{"transactions":[{"id":4619715,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-09-16T20:59:23.000Z","date":"2026-09-14","kind":"grant","planned":false,"acquired":true,"shares":4.8124,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The RSUs, which include an aggregate of 10.1008 Dividend Units, vest in four equal annual installments beginning on April 9, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The RSUs, which include an aggregate of 10.1008 Dividend Units, vest in four equal annual installments beginning on April 9, 2027."}],"balance_after":1406.1008,"derivative":{"underlying":"Common Stock","underlying_shares":4.8124},"source":{"system":"sec-edgar","filing":"0001701764-26-000046","document":"form4-09162026_080918.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1701764/000170176426000046/form4-09162026_080918.xml","form_type":"4"}},{"id":4619714,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-09-16T20:59:23.000Z","date":"2026-09-14","kind":"grant","planned":false,"acquired":true,"shares":2.3261,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The RSUs, which include an aggregate of 12.6733 Dividend Units, vest in three equal annual installments beginning on May 20, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The RSUs, which include an aggregate of 12.6733 Dividend Units, vest in three equal annual installments beginning on May 20, 2027."}],"balance_after":679.6733,"derivative":{"underlying":"Common Stock","underlying_shares":2.3261},"source":{"system":"sec-edgar","filing":"0001701764-26-000046","document":"form4-09162026_080918.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1701764/000170176426000046/form4-09162026_080918.xml","form_type":"4"}},{"id":4619713,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-09-16T20:59:23.000Z","date":"2026-09-14","kind":"grant","planned":false,"acquired":true,"shares":3.7562,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSUs, which include an aggregate of 31.5318 Dividend Units, vest in two equal annual installments beginning on April 29, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The RSUs, which include an aggregate of 31.5318 Dividend Units, vest in two equal annual installments beginning on April 29, 2027."}],"balance_after":1097.5318,"derivative":{"underlying":"Common Stock","underlying_shares":3.7562},"source":{"system":"sec-edgar","filing":"0001701764-26-000046","document":"form4-09162026_080918.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1701764/000170176426000046/form4-09162026_080918.xml","form_type":"4"}},{"id":4619712,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-09-16T20:59:23.000Z","date":"2026-09-14","kind":"grant","planned":false,"acquired":true,"shares":2.0191,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs, which include an aggregate of 16.9452 Dividend Units, vest in two equal annual installments beginning on April 29, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs, which include an aggregate of 16.9452 Dividend Units, vest in two equal annual installments beginning on April 29, 2027."}],"balance_after":589.9452,"derivative":{"underlying":"Common Stock","underlying_shares":2.0191},"source":{"system":"sec-edgar","filing":"0001701764-26-000046","document":"form4-09162026_080918.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1701764/000170176426000046/form4-09162026_080918.xml","form_type":"4"}},{"id":4619711,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-09-16T20:59:23.000Z","date":"2026-09-14","kind":"grant","planned":false,"acquired":true,"shares":1.9191,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs, which include an aggregate of 23.7588 Dividend Units, vest on April 11, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs, which include an aggregate of 23.7588 Dividend Units, vest on April 11, 2027."}],"balance_after":560.7588,"derivative":{"underlying":"Common Stock","underlying_shares":1.9191},"source":{"system":"sec-edgar","filing":"0001701764-26-000046","document":"form4-09162026_080918.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1701764/000170176426000046/form4-09162026_080918.xml","form_type":"4"}},{"id":4619710,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-09-16T20:59:23.000Z","date":"2026-09-14","kind":"grant","planned":false,"acquired":true,"shares":1.0936,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 13.5383 Dividend Units, vest on April 11, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 13.5383 Dividend Units, vest on April 11, 2027."}],"balance_after":319.5383,"derivative":{"underlying":"Common Stock","underlying_shares":1.0936},"source":{"system":"sec-edgar","filing":"0001701764-26-000046","document":"form4-09162026_080918.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1701764/000170176426000046/form4-09162026_080918.xml","form_type":"4"}},{"id":674091,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2026-08-27T23:36:26.000Z","date":"2026-08-25","kind":"sale","planned":true,"acquired":false,"shares":400,"price":174.2592,"value":69703.68,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $174.0925 to $174.71, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 10, 2025."}],"balance_after":11153,"source":{"system":"sec-edgar","filing":"0001701764-26-000043","document":"form4-08272026_110822.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176426000043/form4-08272026_110822.xml","form_type":"4"}},{"id":674090,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2026-08-27T23:36:26.000Z","date":"2026-08-25","kind":"sale","planned":true,"acquired":false,"shares":1307,"price":173.3354,"value":226549.3678,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $172.995 to $173.72, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 10, 2025."}],"balance_after":11553,"source":{"system":"sec-edgar","filing":"0001701764-26-000043","document":"form4-08272026_110822.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176426000043/form4-08272026_110822.xml","form_type":"4"}},{"id":674089,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2026-08-27T23:36:26.000Z","date":"2026-08-25","kind":"sale","planned":true,"acquired":false,"shares":543,"price":172.3039,"value":93561.0177,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $171.88 to $172.85, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 10, 2025."}],"balance_after":12860,"source":{"system":"sec-edgar","filing":"0001701764-26-000043","document":"form4-08272026_110822.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176426000043/form4-08272026_110822.xml","form_type":"4"}},{"id":736693,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-06-16T22:05:20.000Z","date":"2026-06-12","kind":"grant","planned":false,"acquired":true,"shares":2.5562,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The RSUs, which include an aggregate of 27.7756 Dividend Units, vest in two equal annual installments beginning on April 29, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The RSUs, which include an aggregate of 27.7756 Dividend Units, vest in two equal annual installments beginning on April 29, 2027."}],"balance_after":1093.7756,"derivative":{"underlying":"Common Stock","underlying_shares":4.1278},"source":{"system":"sec-edgar","filing":"0001701764-26-000037","document":"form4-06162026_100615.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176426000037/form4-06162026_100615.xml","form_type":"4"}},{"id":736691,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-06-16T22:05:20.000Z","date":"2026-06-12","kind":"grant","planned":false,"acquired":true,"shares":2.2187,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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The shares were sold in multiple transactions at prices ranging from $147.00 to $147.78, inclusive.  The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 10, 2025."}],"balance_after":14847,"source":{"system":"sec-edgar","filing":"0001701764-26-000031","document":"form4-05202026_090521.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176426000031/form4-05202026_090521.xml","form_type":"4"}},{"id":770490,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2026-05-20T21:53:25.000Z","date":"2026-05-19","kind":"sale","planned":true,"acquired":false,"shares":250,"price":146.3663,"value":36591.575,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price.  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The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 10, 2025."}],"balance_after":15247,"source":{"system":"sec-edgar","filing":"0001701764-26-000031","document":"form4-05202026_090521.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176426000031/form4-05202026_090521.xml","form_type":"4"}},{"id":796018,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2026-05-01T21:13:34.000Z","date":"2026-04-29","kind":"exercise","planned":false,"acquired":false,"shares":293.3649,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The RSUs, which include an aggregate of 7.1597 Dividend Units, vest in four equal annual installments beginning on May 20, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The RSUs, which include an aggregate of 7.1597 Dividend Units, vest in four equal annual installments beginning on May 20, 2026."}],"balance_after":896.1597,"derivative":{"underlying":"Common Stock","underlying_shares":2.5445},"source":{"system":"sec-edgar","filing":"0001701764-25-000013","document":"form4-12162025_111213.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000013/form4-12162025_111213.xml","form_type":"4"}},{"id":968108,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-12-16T23:02:17.000Z","date":"2025-12-12","kind":"grant","planned":false,"acquired":true,"shares":2.4871,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The RSUs, which include an aggregate of 15.9206 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The RSUs, which include an aggregate of 15.9206 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."}],"balance_after":875.9206,"derivative":{"underlying":"Common Stock","underlying_shares":2.4871},"source":{"system":"sec-edgar","filing":"0001701764-25-000013","document":"form4-12162025_111213.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000013/form4-12162025_111213.xml","form_type":"4"}},{"id":968107,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-12-16T23:02:17.000Z","date":"2025-12-12","kind":"grant","planned":false,"acquired":true,"shares":3.1474,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSUs, which include an aggregate of 35.4327 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The RSUs, which include an aggregate of 35.4327 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."}],"balance_after":1108.4327,"derivative":{"underlying":"Common Stock","underlying_shares":3.1474},"source":{"system":"sec-edgar","filing":"0001701764-25-000013","document":"form4-12162025_111213.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000013/form4-12162025_111213.xml","form_type":"4"}},{"id":968106,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-12-16T23:02:17.000Z","date":"2025-12-12","kind":"grant","planned":false,"acquired":true,"shares":1.7922,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs, which include an aggregate of 20.1779 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs, which include an aggregate of 20.1779 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."}],"balance_after":631.1779,"derivative":{"underlying":"Common Stock","underlying_shares":1.7922},"source":{"system":"sec-edgar","filing":"0001701764-25-000013","document":"form4-12162025_111213.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000013/form4-12162025_111213.xml","form_type":"4"}},{"id":968105,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-12-16T23:02:17.000Z","date":"2025-12-12","kind":"grant","planned":false,"acquired":true,"shares":1.6295,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs, which include an aggregate of 25.8705 Dividend Units, vest on March 10, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs, which include an aggregate of 25.8705 Dividend Units, vest on March 10, 2026."}],"balance_after":573.8705,"derivative":{"underlying":"Common Stock","underlying_shares":1.6295},"source":{"system":"sec-edgar","filing":"0001701764-25-000013","document":"form4-12162025_111213.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000013/form4-12162025_111213.xml","form_type":"4"}},{"id":968104,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-12-16T23:02:17.000Z","date":"2025-12-12","kind":"grant","planned":false,"acquired":true,"shares":1.1329,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 17.9839 Dividend Units, vest on March 10, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 17.9839 Dividend Units, vest on March 10, 2026."}],"balance_after":398.9839,"derivative":{"underlying":"Common Stock","underlying_shares":1.1329},"source":{"system":"sec-edgar","filing":"0001701764-25-000013","document":"form4-12162025_111213.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000013/form4-12162025_111213.xml","form_type":"4"}},{"id":990531,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-11-24T22:28:08.000Z","date":"2025-11-20","kind":"sale","planned":true,"acquired":false,"shares":30,"price":176.3925,"value":5291.775,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $176.31 to $176.8050, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":15573,"source":{"system":"sec-edgar","filing":"0001701764-25-000010","document":"form4-11242025_101104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000010/form4-11242025_101104.xml","form_type":"4"}},{"id":990530,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-11-24T22:28:08.000Z","date":"2025-11-20","kind":"sale","planned":true,"acquired":false,"shares":60,"price":175.4279,"value":10525.674,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $175.22 to $175.75, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":15603,"source":{"system":"sec-edgar","filing":"0001701764-25-000010","document":"form4-11242025_101104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000010/form4-11242025_101104.xml","form_type":"4"}},{"id":990529,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-11-24T22:28:08.000Z","date":"2025-11-20","kind":"sale","planned":true,"acquired":false,"shares":343,"price":174.8737,"value":59981.6791,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $174.60 to $175.20, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":15663,"source":{"system":"sec-edgar","filing":"0001701764-25-000010","document":"form4-11242025_101104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000010/form4-11242025_101104.xml","form_type":"4"}},{"id":990528,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-11-24T22:28:08.000Z","date":"2025-11-20","kind":"sale","planned":true,"acquired":false,"shares":1317,"price":174.1586,"value":229366.8762,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $173.59 to $174.56, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":16006,"source":{"system":"sec-edgar","filing":"0001701764-25-000010","document":"form4-11242025_101104.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000010/form4-11242025_101104.xml","form_type":"4"}},{"id":1039697,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-09-16T23:03:45.000Z","date":"2025-09-12","kind":"grant","planned":false,"acquired":true,"shares":2.2041,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The RSUs, which include an aggregate of 4.6152 Dividend Units, vest in four equal annual installments beginning on May 20, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The RSUs, which include an aggregate of 4.6152 Dividend Units, vest in four equal annual installments beginning on May 20, 2026."}],"balance_after":893.6152,"derivative":{"underlying":"Common Stock","underlying_shares":2.2041},"source":{"system":"sec-edgar","filing":"0001701764-25-000004","document":"form4-09162025_110941.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000004/form4-09162025_110941.xml","form_type":"4"}},{"id":1039696,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-09-16T23:03:45.000Z","date":"2025-09-12","kind":"grant","planned":false,"acquired":true,"shares":2.1544,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The RSUs, which include an aggregate of 13.4335 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The RSUs, which include an aggregate of 13.4335 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."}],"balance_after":873.4335,"derivative":{"underlying":"Common Stock","underlying_shares":2.1544},"source":{"system":"sec-edgar","filing":"0001701764-25-000004","document":"form4-09162025_110941.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000004/form4-09162025_110941.xml","form_type":"4"}},{"id":1039695,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-09-16T23:03:45.000Z","date":"2025-09-12","kind":"grant","planned":false,"acquired":true,"shares":2.7262,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSUs, which include an aggregate of 32.2853 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The RSUs, which include an aggregate of 32.2853 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."}],"balance_after":1105.2853,"derivative":{"underlying":"Common Stock","underlying_shares":2.7262},"source":{"system":"sec-edgar","filing":"0001701764-25-000004","document":"form4-09162025_110941.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000004/form4-09162025_110941.xml","form_type":"4"}},{"id":1039694,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-09-16T23:03:45.000Z","date":"2025-09-12","kind":"grant","planned":false,"acquired":true,"shares":1.5524,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs, which include an aggregate of 18.3857 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs, which include an aggregate of 18.3857 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."}],"balance_after":629.3857,"derivative":{"underlying":"Common Stock","underlying_shares":1.5524},"source":{"system":"sec-edgar","filing":"0001701764-25-000004","document":"form4-09162025_110941.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000004/form4-09162025_110941.xml","form_type":"4"}},{"id":1039693,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-09-16T23:03:45.000Z","date":"2025-09-12","kind":"grant","planned":false,"acquired":true,"shares":1.4114,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs, which include an aggregate of 24.2410 Dividend Units, vest on March 10, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs, which include an aggregate of 24.2410 Dividend Units, vest on March 10, 2026."}],"balance_after":572.241,"derivative":{"underlying":"Common Stock","underlying_shares":1.4114},"source":{"system":"sec-edgar","filing":"0001701764-25-000004","document":"form4-09162025_110941.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000004/form4-09162025_110941.xml","form_type":"4"}},{"id":1039692,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-09-16T23:03:45.000Z","date":"2025-09-12","kind":"grant","planned":false,"acquired":true,"shares":0.9813,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 16.8510 Dividend Units, vest on March 10, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 16.8510 Dividend Units, vest on March 10, 2026."}],"balance_after":397.851,"derivative":{"underlying":"Common Stock","underlying_shares":0.9813},"source":{"system":"sec-edgar","filing":"0001701764-25-000004","document":"form4-09162025_110941.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000170176425000004/form4-09162025_110941.xml","form_type":"4"}},{"id":1058588,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-08-22T20:41:50.000Z","date":"2025-08-20","kind":"sale","planned":true,"acquired":false,"shares":519,"price":188.1333,"value":97641.1827,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $187.74 to $190.27, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":17323,"source":{"system":"sec-edgar","filing":"0001415889-25-022765","document":"form4-08222025_080844.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925022765/form4-08222025_080844.xml","form_type":"4"}},{"id":1058587,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-08-22T20:41:50.000Z","date":"2025-08-20","kind":"sale","planned":true,"acquired":false,"shares":996,"price":187.2999,"value":186550.7004,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $186.71 to $187.65, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":17842,"source":{"system":"sec-edgar","filing":"0001415889-25-022765","document":"form4-08222025_080844.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925022765/form4-08222025_080844.xml","form_type":"4"}},{"id":1058586,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-08-22T20:41:50.000Z","date":"2025-08-20","kind":"sale","planned":true,"acquired":false,"shares":235,"price":186.4189,"value":43808.4415,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $185.7250 to $186.68, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":18838,"source":{"system":"sec-edgar","filing":"0001415889-25-022765","document":"form4-08222025_080844.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925022765/form4-08222025_080844.xml","form_type":"4"}},{"id":1108566,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-06-17T21:27:18.000Z","date":"2025-06-13","kind":"grant","planned":false,"acquired":true,"shares":2.4111,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The RSUs, which include an aggregate of 2.4111 Dividend Units, vest in four equal annual installments beginning on May 20, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The RSUs, which include an aggregate of 2.4111 Dividend Units, vest in four equal annual installments beginning on May 20, 2026."}],"balance_after":891.4111,"derivative":{"underlying":"Common Stock","underlying_shares":2.4111},"source":{"system":"sec-edgar","filing":"0001415889-25-017572","document":"form4-06172025_090614.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925017572/form4-06172025_090614.xml","form_type":"4"}},{"id":1108565,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-06-17T21:27:18.000Z","date":"2025-06-13","kind":"grant","planned":false,"acquired":true,"shares":2.3565,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The RSUs, which include an aggregate of 11.2791 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The RSUs, which include an aggregate of 11.2791 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."}],"balance_after":871.2791,"derivative":{"underlying":"Common Stock","underlying_shares":2.3565},"source":{"system":"sec-edgar","filing":"0001415889-25-017572","document":"form4-06172025_090614.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925017572/form4-06172025_090614.xml","form_type":"4"}},{"id":1108564,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-06-17T21:27:18.000Z","date":"2025-06-13","kind":"grant","planned":false,"acquired":true,"shares":2.982,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSUs, which include an aggregate of 29.5591 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The RSUs, which include an aggregate of 29.5591 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."}],"balance_after":1102.5591,"derivative":{"underlying":"Common Stock","underlying_shares":2.982},"source":{"system":"sec-edgar","filing":"0001415889-25-017572","document":"form4-06172025_090614.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925017572/form4-06172025_090614.xml","form_type":"4"}},{"id":1108563,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-06-17T21:27:18.000Z","date":"2025-06-13","kind":"grant","planned":false,"acquired":true,"shares":1.698,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs, which include an aggregate of 16.8333 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs, which include an aggregate of 16.8333 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."}],"balance_after":627.8333,"derivative":{"underlying":"Common Stock","underlying_shares":1.698},"source":{"system":"sec-edgar","filing":"0001415889-25-017572","document":"form4-06172025_090614.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925017572/form4-06172025_090614.xml","form_type":"4"}},{"id":1108562,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-06-17T21:27:18.000Z","date":"2025-06-13","kind":"grant","planned":false,"acquired":true,"shares":1.5439,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs, which include an aggregate of 22.8296 Dividend Units, vest on March 10, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs, which include an aggregate of 22.8296 Dividend Units, vest on March 10, 2026."}],"balance_after":570.8296,"derivative":{"underlying":"Common Stock","underlying_shares":1.5439},"source":{"system":"sec-edgar","filing":"0001415889-25-017572","document":"form4-06172025_090614.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925017572/form4-06172025_090614.xml","form_type":"4"}},{"id":1108561,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-06-17T21:27:18.000Z","date":"2025-06-13","kind":"grant","planned":false,"acquired":true,"shares":1.0734,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 15.8697 Dividend Units, vest on March 10, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 15.8697 Dividend Units, vest on March 10, 2026."}],"balance_after":396.8697,"derivative":{"underlying":"Common Stock","underlying_shares":1.0734},"source":{"system":"sec-edgar","filing":"0001415889-25-017572","document":"form4-06172025_090614.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925017572/form4-06172025_090614.xml","form_type":"4"}},{"id":1137866,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-05-22T21:55:44.000Z","date":"2025-05-20","kind":"grant","planned":false,"acquired":true,"shares":889,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs (\"Dividend Units\") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest in four equal annual installments beginning on May 20, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest in four equal annual installments beginning on May 20, 2026."}],"balance_after":889,"derivative":{"underlying":"Common Stock","underlying_shares":889},"source":{"system":"sec-edgar","filing":"0001415889-25-014235","document":"form4-05222025_090541.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925014235/form4-05222025_090541.xml","form_type":"4"}},{"id":1149728,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-14T21:20:47.000Z","date":"2025-05-12","kind":"sale","planned":true,"acquired":false,"shares":256,"price":192.03,"value":49159.68,"ownership":{"direct":true},"balance_after":19073,"source":{"system":"sec-edgar","filing":"0001415889-25-012921","document":"form4-05142025_090543.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925012921/form4-05142025_090543.xml","form_type":"4"}},{"id":1149727,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-14T21:20:47.000Z","date":"2025-05-12","kind":"sale","planned":true,"acquired":false,"shares":108,"price":190.0515,"value":20525.562,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $190.0350 to $190.13, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."}],"balance_after":19329,"source":{"system":"sec-edgar","filing":"0001415889-25-012921","document":"form4-05142025_090543.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925012921/form4-05142025_090543.xml","form_type":"4"}},{"id":1149726,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-14T21:20:47.000Z","date":"2025-05-12","kind":"sale","planned":true,"acquired":false,"shares":363,"price":189.031,"value":68618.253,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $189.00 to $189.2475, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."}],"balance_after":19437,"source":{"system":"sec-edgar","filing":"0001415889-25-012921","document":"form4-05142025_090543.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925012921/form4-05142025_090543.xml","form_type":"4"}},{"id":1149725,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-14T21:20:47.000Z","date":"2025-05-12","kind":"sale","planned":true,"acquired":false,"shares":666,"price":187.3824,"value":124796.6784,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $187.1050 to $188.00, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."}],"balance_after":19800,"source":{"system":"sec-edgar","filing":"0001415889-25-012921","document":"form4-05142025_090543.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925012921/form4-05142025_090543.xml","form_type":"4"}},{"id":1149724,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-14T21:20:47.000Z","date":"2025-05-12","kind":"sale","planned":true,"acquired":false,"shares":328,"price":186.97,"value":61326.16,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $186.0950 to $187.00, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."}],"balance_after":20466,"source":{"system":"sec-edgar","filing":"0001415889-25-012921","document":"form4-05142025_090543.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925012921/form4-05142025_090543.xml","form_type":"4"}},{"id":1149723,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-14T21:20:47.000Z","date":"2025-05-12","kind":"sale","planned":true,"acquired":false,"shares":29,"price":185.6221,"value":5383.0409,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $185.06 to $186.0175, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."}],"balance_after":20794,"source":{"system":"sec-edgar","filing":"0001415889-25-012921","document":"form4-05142025_090543.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925012921/form4-05142025_090543.xml","form_type":"4"}},{"id":1162721,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-05-01T21:21:51.000Z","date":"2025-04-29","kind":"exercise","planned":false,"acquired":false,"shares":288.9672,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 8.9226 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 8.9226 Dividend Units, vest in three equal annual installments beginning on April 29, 2026."}],"balance_after":868.9226,"derivative":{"underlying":"Common Stock","underlying_shares":1157.8898},"source":{"system":"sec-edgar","filing":"0001415889-25-011670","document":"form4-05012025_090547.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925011670/form4-05012025_090547.xml","form_type":"4"}},{"id":1162720,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-01T21:21:51.000Z","date":"2025-04-29","kind":"tax_withholding","planned":false,"acquired":false,"shares":136,"price":162.69,"value":22125.84,"ownership":{"direct":true},"balance_after":20823,"source":{"system":"sec-edgar","filing":"0001415889-25-011670","document":"form4-05012025_090547.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925011670/form4-05012025_090547.xml","form_type":"4"}},{"id":1162719,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-01T21:21:51.000Z","date":"2025-04-29","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":2.9672,"price":162.69,"value":482.733768,"ownership":{"direct":true},"balance_after":20959,"source":{"system":"sec-edgar","filing":"0001415889-25-011670","document":"form4-05012025_090547.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925011670/form4-05012025_090547.xml","form_type":"4"}},{"id":1162718,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-05-01T21:21:51.000Z","date":"2025-04-29","kind":"exercise","planned":false,"acquired":true,"shares":288.9672,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."}],"balance_after":20961.9672,"source":{"system":"sec-edgar","filing":"0001415889-25-011670","document":"form4-05012025_090547.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925011670/form4-05012025_090547.xml","form_type":"4"}},{"id":1172102,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-04-15T22:23:19.000Z","date":"2025-04-11","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":313.58,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 15.1353 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 15.1353 Dividend Units, vest in two equal annual installments beginning on April 11, 2026."}],"balance_after":626.1353,"derivative":{"underlying":"Common Stock","underlying_shares":939.7153},"source":{"system":"sec-edgar","filing":"0001415889-25-010729","document":"form4-04152025_100415.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925010729/form4-04152025_100415.xml","form_type":"4"}},{"id":1172101,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-04-15T22:23:19.000Z","date":"2025-04-11","kind":"tax_withholding","planned":false,"acquired":false,"shares":136,"price":167.9,"value":22834.4,"ownership":{"direct":true},"balance_after":20673,"source":{"system":"sec-edgar","filing":"0001415889-25-010729","document":"form4-04152025_100415.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925010729/form4-04152025_100415.xml","form_type":"4"}},{"id":1172100,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-04-15T22:23:19.000Z","date":"2025-04-11","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":7.58,"price":167.9,"value":1272.682,"ownership":{"direct":true},"balance_after":20809,"source":{"system":"sec-edgar","filing":"0001415889-25-010729","document":"form4-04152025_100415.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925010729/form4-04152025_100415.xml","form_type":"4"}},{"id":1172099,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-04-15T22:23:19.000Z","date":"2025-04-11","kind":"exercise","planned":false,"acquired":true,"shares":313.58,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."}],"balance_after":20816.58,"source":{"system":"sec-edgar","filing":"0001415889-25-010729","document":"form4-04152025_100415.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925010729/form4-04152025_100415.xml","form_type":"4"}},{"id":1191353,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-03-26T21:27:44.000Z","date":"2025-03-22","kind":"exercise","planned":false,"acquired":false,"shares":758.6932,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs, which include an aggregate of 37.6932 Dividend Units, vested on March 22, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs, which include an aggregate of 37.6932 Dividend Units, vested on March 22, 2025."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":758.6932},"source":{"system":"sec-edgar","filing":"0001415889-25-009055","document":"form4-03262025_090341.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925009055/form4-03262025_090341.xml","form_type":"4"}},{"id":1191352,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Restricted Stock Units","published_at":"2025-03-26T21:27:44.000Z","date":"2025-03-22","kind":"exercise","planned":false,"acquired":false,"shares":421.9613,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 20.9613 Dividend Units, vested on March 22, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 20.9613 Dividend Units, vested on March 22, 2025."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":421.9613},"source":{"system":"sec-edgar","filing":"0001415889-25-009055","document":"form4-03262025_090341.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925009055/form4-03262025_090341.xml","form_type":"4"}},{"id":1191351,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-03-26T21:27:44.000Z","date":"2025-03-22","kind":"tax_withholding","planned":false,"acquired":false,"shares":212,"price":180.14,"value":38189.68,"ownership":{"direct":true},"balance_after":20503,"source":{"system":"sec-edgar","filing":"0001415889-25-009055","document":"form4-03262025_090341.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925009055/form4-03262025_090341.xml","form_type":"4"}},{"id":1191350,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":19166,"kind":"person","name":"Yellin Jonathan D","position":1,"cik":"0001701764","reported_name":"Yellin Jonathan D","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP AND GENERAL COUNSEL"}}],"security":"Common Stock","published_at":"2025-03-26T21:27:44.000Z","date":"2025-03-22","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":37.6932,"price":180.14,"value":6790.053048,"ownership":{"direct":true},"balance_after":20715,"source":{"system":"sec-edgar","filing":"0001415889-25-009055","document":"form4-03262025_090341.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925009055/form4-03262025_090341.xml","form_type":"4"}}],"next_cursor":"2025-03-26T21:27:44.000000Z,1191350"}