{"transactions":[{"id":4632541,"issuer":{"id":6037,"kind":"organization","name":"TCW STRATEGIC INCOME FUND INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Shares","published_at":"2026-09-30T15:38:55.000Z","date":"2026-09-29","kind":"purchase","planned":false,"acquired":false,"shares":63000,"price":4.2419,"value":267239.7,"ownership":{"direct":true},"balance_after":22722.203,"source":{"system":"sec-edgar","filing":"0001193125-26-408652","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/809559/000119312526408652/ownership.xml","form_type":"4"}},{"id":825795,"issuer":{"id":6037,"kind":"organization","name":"TCW STRATEGIC INCOME FUND INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Subscription Rights for Shares of Common Stock (right to buy","published_at":"2026-03-31T01:53:19.000Z","date":"2026-03-27","kind":"other","planned":false,"acquired":false,"shares":64290,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"TCW Strategic Income Fund, Inc. (NYSE: TSI) (the \"Fund\") issued to the stockholders of record (the \"Record Date Stockholders\") at the close of business on February 19, 2026 (the \"Record Date\") transferable rights (each a \"Right\" and, collectively, the \"Rights\") entitling such Record Date Stockholders to subscribe for shares of common stock, par value $0.01 per share (the \"Common Stock\"), of the Fund (the \"Offer\") at a discount to the market price of the shares of Common Stock. The Fund distributed to Record Date Stockholders one Right for each share of Common Stock held on the Record Date. Record Date Stockholders were entitled to purchase one new share of Common Stock for every three Rights held (1-for-3); however, any Record Date Stockholder who owned fewer than three shares of Common Stock as of the Record Date was entitled to subscribe for one share of Common Stock. Fractional shares of Common Stock were not issued."},{"field":"security","element":"securityTitle","label":"F2","text":"(Continued from footnote 1) The subscription period commenced on the Record Date and expired on March 18, 2026."},{"field":"security","element":"securityTitle","label":"F3","text":"The final subscription price of $4.47 per share of Common Stock was determined based upon the terms of the Offer. Record Date Stockholders who exercised all of their primary subscription Rights (other than those Rights to acquire less than one share of Common Stock that could not be exercised) were eligible for an over-subscription privilege entitling Record Date Stockholders to subscribe for additional shares of Common Stock not purchased pursuant to the primary subscription. The Offer was over-subscribed. The over-subscription requests exceeded the over subscription shares of Common Stock available. Accordingly, the shares of Common Stock subscribed for pursuant to the over-subscription privilege of the Offer were allocated pro rata among those fully exercising record date shareholders who over-subscribed based on the number of shares of Common Stock they owned on Record Date."},{"field":"security","element":"securityTitle","label":"F4","text":"(Continued from footnoote 2) The number of shares of Common Stock acquired was confirmed to exercising Rights holders on March 27, 2026, following the pro-ration and allocation of shares of Common Stock pursuant to the over-subscription privilege."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"TCW Strategic Income Fund, Inc. (NYSE: TSI) (the \"Fund\") issued to the stockholders of record (the \"Record Date Stockholders\") at the close of business on February 19, 2026 (the \"Record Date\") transferable rights (each a \"Right\" and, collectively, the \"Rights\") entitling such Record Date Stockholders to subscribe for shares of common stock, par value $0.01 per share (the \"Common Stock\"), of the Fund (the \"Offer\") at a discount to the market price of the shares of Common Stock. The Fund distributed to Record Date Stockholders one Right for each share of Common Stock held on the Record Date. Record Date Stockholders were entitled to purchase one new share of Common Stock for every three Rights held (1-for-3); however, any Record Date Stockholder who owned fewer than three shares of Common Stock as of the Record Date was entitled to subscribe for one share of Common Stock. Fractional shares of Common Stock were not issued."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"(Continued from footnote 1) The subscription period commenced on the Record Date and expired on March 18, 2026."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The final subscription price of $4.47 per share of Common Stock was determined based upon the terms of the Offer. Record Date Stockholders who exercised all of their primary subscription Rights (other than those Rights to acquire less than one share of Common Stock that could not be exercised) were eligible for an over-subscription privilege entitling Record Date Stockholders to subscribe for additional shares of Common Stock not purchased pursuant to the primary subscription. The Offer was over-subscribed. The over-subscription requests exceeded the over subscription shares of Common Stock available. Accordingly, the shares of Common Stock subscribed for pursuant to the over-subscription privilege of the Offer were allocated pro rata among those fully exercising record date shareholders who over-subscribed based on the number of shares of Common Stock they owned on Record Date."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"(Continued from footnoote 2) The number of shares of Common Stock acquired was confirmed to exercising Rights holders on March 27, 2026, following the pro-ration and allocation of shares of Common Stock pursuant to the over-subscription privilege."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"TCW Strategic Income Fund, Inc. (NYSE: TSI) (the \"Fund\") issued to the stockholders of record (the \"Record Date Stockholders\") at the close of business on February 19, 2026 (the \"Record Date\") transferable rights (each a \"Right\" and, collectively, the \"Rights\") entitling such Record Date Stockholders to subscribe for shares of common stock, par value $0.01 per share (the \"Common Stock\"), of the Fund (the \"Offer\") at a discount to the market price of the shares of Common Stock. The Fund distributed to Record Date Stockholders one Right for each share of Common Stock held on the Record Date. Record Date Stockholders were entitled to purchase one new share of Common Stock for every three Rights held (1-for-3); however, any Record Date Stockholder who owned fewer than three shares of Common Stock as of the Record Date was entitled to subscribe for one share of Common Stock. Fractional shares of Common Stock were not issued."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(Continued from footnote 1) The subscription period commenced on the Record Date and expired on March 18, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The final subscription price of $4.47 per share of Common Stock was determined based upon the terms of the Offer. Record Date Stockholders who exercised all of their primary subscription Rights (other than those Rights to acquire less than one share of Common Stock that could not be exercised) were eligible for an over-subscription privilege entitling Record Date Stockholders to subscribe for additional shares of Common Stock not purchased pursuant to the primary subscription. The Offer was over-subscribed. The over-subscription requests exceeded the over subscription shares of Common Stock available. Accordingly, the shares of Common Stock subscribed for pursuant to the over-subscription privilege of the Offer were allocated pro rata among those fully exercising record date shareholders who over-subscribed based on the number of shares of Common Stock they owned on Record Date."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"(Continued from footnoote 2) The number of shares of Common Stock acquired was confirmed to exercising Rights holders on March 27, 2026, following the pro-ration and allocation of shares of Common Stock pursuant to the over-subscription privilege."}],"balance_after":0,"derivative":{"exercise_date":"2026-02-19","expiration_date":"2026-03-18","underlying":"Common  Stock","underlying_shares":21430},"source":{"system":"sec-edgar","filing":"0001193125-26-132934","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/809559/000119312526132934/ownership.xml","form_type":"4"}},{"id":825794,"issuer":{"id":6037,"kind":"organization","name":"TCW STRATEGIC INCOME FUND INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-03-31T01:53:19.000Z","date":"2026-03-27","kind":"other","planned":false,"acquired":true,"shares":21430,"price":4.47,"value":95792.1,"ownership":{"direct":true},"balance_after":85722.203,"source":{"system":"sec-edgar","filing":"0001193125-26-132934","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/809559/000119312526132934/ownership.xml","form_type":"4"}},{"id":2323667,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2022-03-21T21:16:53.000Z","date":"2022-03-17","kind":"sale","acquired":false,"shares":318,"price":164.545,"value":52325.31,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"All shares sold at an exact price."}],"balance_after":3062,"source":{"system":"sec-edgar","filing":"0000831641-22-000016","document":"wf-form4_164789739826045.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164122000016/wf-form4_164789739826045.xml","form_type":"4"}},{"id":2496694,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)","published_at":"2021-11-25T00:59:43.000Z","date":"2021-11-23","kind":"grant","acquired":true,"shares":318,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The restricted stock units (RSUs) become 100% vested as to the shares underlying the RSUs on November 18, 2022."}],"balance_after":318,"derivative":{"exercise_price":0,"exercise_date":"2022-11-18","expiration_date":"2022-11-19","underlying":"COMMON STOCK","underlying_shares":318},"source":{"system":"sec-edgar","filing":"0000831641-21-000138","document":"wf-form4_163780196827794.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000138/wf-form4_163780196827794.xml","form_type":"4"}},{"id":2496693,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2021-11-25T00:59:43.000Z","date":"2021-11-24","kind":"sale","acquired":false,"shares":110,"price":189.8494,"value":20883.434,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All shares sold at an exact price."}],"balance_after":3380,"source":{"system":"sec-edgar","filing":"0000831641-21-000138","document":"wf-form4_163780196827794.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000138/wf-form4_163780196827794.xml","form_type":"4"}},{"id":2496692,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2021-11-25T00:59:43.000Z","date":"2021-11-24","kind":"sale","acquired":false,"shares":2200,"price":188.94,"value":415668.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"$188.94 is an average price. Shares were sold at prices ranging from $188.76 to $189.16 per share."}],"balance_after":3490,"source":{"system":"sec-edgar","filing":"0000831641-21-000138","document":"wf-form4_163780196827794.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000138/wf-form4_163780196827794.xml","form_type":"4"}},{"id":2496691,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2021-11-25T00:59:43.000Z","date":"2021-11-23","kind":"sale","acquired":false,"shares":410,"price":186.03,"value":76272.3,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All shares sold at an exact price."}],"balance_after":5690,"source":{"system":"sec-edgar","filing":"0000831641-21-000138","document":"wf-form4_163780196827794.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000138/wf-form4_163780196827794.xml","form_type":"4"}},{"id":2496690,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2021-11-25T00:59:43.000Z","date":"2021-11-23","kind":"grant","acquired":true,"shares":2310,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares acquired pursuant to vesting of performance stock units (PSUs) earned under 2018 Equity Incentive Plan."}],"balance_after":6100,"source":{"system":"sec-edgar","filing":"0000831641-21-000138","document":"wf-form4_163780196827794.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000138/wf-form4_163780196827794.xml","form_type":"4"}},{"id":2501685,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)","published_at":"2021-11-23T00:41:42.000Z","date":"2021-11-18","kind":"exercise","acquired":false,"shares":410,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The restricted stock units (RSUs) become 100% vested as to the shares underlying the RSUs on November 18, 2021."}],"balance_after":0,"derivative":{"exercise_price":0,"exercise_date":"2021-11-18","expiration_date":"2021-11-19","underlying":"COMMON STOCK","underlying_shares":410},"source":{"system":"sec-edgar","filing":"0000831641-21-000097","document":"wf-form4_163762808887027.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000097/wf-form4_163762808887027.xml","form_type":"4"}},{"id":2501684,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2021-11-23T00:41:42.000Z","date":"2021-11-18","kind":"exercise","acquired":true,"shares":410,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares automatically acquired upon the vesting of restricted stock units (RSUs)."}],"balance_after":3790,"source":{"system":"sec-edgar","filing":"0000831641-21-000097","document":"wf-form4_163762808887027.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000097/wf-form4_163762808887027.xml","form_type":"4"}},{"id":2575276,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2021-09-09T23:00:50.000Z","date":"2021-09-07","kind":"sale","acquired":false,"shares":5400,"price":147.8826,"value":798566.04,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"$147.8826 is an average price. Shares were sold at prices ranging from $147.802 to $147.90 per share."}],"balance_after":3380,"source":{"system":"sec-edgar","filing":"0000831641-21-000068","document":"wf-form4_163122843145748.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164121000068/wf-form4_163122843145748.xml","form_type":"4"}},{"id":2966978,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-25T22:10:56.000Z","date":"2020-11-24","kind":"sale","acquired":false,"shares":4182,"price":123.2899,"value":515598.3618,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"$123.2899 is an average price. Shares were sold at prices ranging from $123.10 to $123.40 per share."}],"balance_after":8780,"source":{"system":"sec-edgar","filing":"0000831641-20-000162","document":"wf-form4_160634223860191.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000162/wf-form4_160634223860191.xml","form_type":"4"}},{"id":2971918,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)","published_at":"2020-11-20T21:55:34.000Z","date":"2020-11-19","kind":"grant","acquired":true,"shares":410,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The restricted stock units (RSUs) become 100% vested as to the shares underlying the RSUs on November 18, 2021."}],"balance_after":410,"derivative":{"exercise_price":0,"exercise_date":"2021-11-18","expiration_date":"2021-11-19","underlying":"COMMON STOCK","underlying_shares":410},"source":{"system":"sec-edgar","filing":"0000831641-20-000122","document":"wf-form4_160590932217232.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000122/wf-form4_160590932217232.xml","form_type":"4"}},{"id":2976401,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-18","kind":"exercise","acquired":false,"shares":582,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The restricted stock units (RSUs) became vested as to 100% of the shares underlying the RSUs on November 18, 2020."}],"balance_after":0,"derivative":{"exercise_price":0,"exercise_date":"2020-11-18","expiration_date":"2020-11-21","underlying":"COMMON STOCK","underlying_shares":582},"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976400,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION (RIGHT TO BUY)","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":false,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option became exercisable as to 100% of the shares on the anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The option granted expires 10 years after the grant date."}],"balance_after":0,"derivative":{"exercise_price":47.95,"exercise_date":"2018-11-17","expiration_date":"2027-11-17","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976399,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION (RIGHT TO BUY)","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":false,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option became exercisable as to 100% of the shares on the anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The option granted expires 10 years after the grant date."}],"balance_after":0,"derivative":{"exercise_price":40.8,"exercise_date":"2017-11-20","expiration_date":"2026-11-20","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976398,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION (RIGHT TO BUY)","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":false,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option became exercisable as to 100% of the shares on the anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The option granted expires 8 years after the grant date."}],"balance_after":0,"derivative":{"exercise_price":27.16,"exercise_date":"2016-11-20","expiration_date":"2025-11-20","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976397,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION (RIGHT TO BUY)","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":false,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option became exercisable as to 100% of the shares on the anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The option granted expires 8 years after the grant date."}],"balance_after":0,"derivative":{"exercise_price":27.26,"exercise_date":"2015-11-21","expiration_date":"2023-11-21","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976396,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION (RIGHT TO BUY)","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":false,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The option became exercisable as to 100% of the shares on the anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The option granted expires 8 years after the grant date."}],"balance_after":0,"derivative":{"exercise_price":28.58,"exercise_date":"2014-11-22","expiration_date":"2021-11-22","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976395,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-18","kind":"grant","acquired":true,"shares":3600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"Shares acquired pursuant to vesting of performance stock units (PSUs) earned under 2015 Equity Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"Each PSU represents the right to receive one share of Tetra Tech common stock."}],"balance_after":12962,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976394,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-18","kind":"exercise","acquired":true,"shares":582,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares automatically acquired upon the vesting of restricted stock units (RSUs)."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each RSU represented the right to receive one share of Tetra Tech common stock."}],"balance_after":9362,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976393,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"sale","acquired":false,"shares":21000,"price":122.8257,"value":2579339.7,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"$122.8257 is an average price. Shares were sold at prices ranging from $118.80 to $124.68 per share."}],"balance_after":8780,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976392,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":true,"shares":4200,"price":47.95,"value":201390.0,"ownership":{"direct":true},"balance_after":29780,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976391,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":true,"shares":4200,"price":40.8,"value":171360.0,"ownership":{"direct":true},"balance_after":25580,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976390,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":true,"shares":4200,"price":27.16,"value":114072.0,"ownership":{"direct":true},"balance_after":21380,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976389,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":true,"shares":4200,"price":27.26,"value":114492.0,"ownership":{"direct":true},"balance_after":17180,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":2976388,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2020-11-19T01:04:27.000Z","date":"2020-11-16","kind":"exercise","acquired":true,"shares":4200,"price":28.58,"value":120036.0,"ownership":{"direct":true},"balance_after":12980,"source":{"system":"sec-edgar","filing":"0000831641-20-000103","document":"wf-form4_160574785188983.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164120000103/wf-form4_160574785188983.xml","form_type":"4"}},{"id":3351553,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"EMPLOYEE STOCK OPTION (RIGHT TO BUY)","published_at":"2019-12-05T22:22:43.000Z","date":"2019-12-03","kind":"exercise","acquired":false,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The option became exercisable as to 100% of the shares on the anniversary of the grant date."}],"balance_after":0,"derivative":{"exercise_price":24.26,"exercise_date":"2013-11-16","expiration_date":"2020-11-16","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0000831641-19-000199","document":"wf-form4_157558454556059.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000199/wf-form4_157558454556059.xml","form_type":"4"}},{"id":3351552,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-12-05T22:22:43.000Z","date":"2019-12-03","kind":"sale","acquired":false,"shares":3830,"price":86.2394,"value":330296.902,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"$86.2394 is an average price. Shares were sold at prices ranging from $86.00 to $87.00 per share."}],"balance_after":8780,"source":{"system":"sec-edgar","filing":"0000831641-19-000199","document":"wf-form4_157558454556059.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000199/wf-form4_157558454556059.xml","form_type":"4"}},{"id":3351551,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-12-05T22:22:43.000Z","date":"2019-12-03","kind":"sale","acquired":false,"shares":4200,"price":86.4536,"value":363105.12,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"$86.4536 is an average price. Shares were sold at prices ranging from $86.00 to $87.05 per share."}],"balance_after":12610,"source":{"system":"sec-edgar","filing":"0000831641-19-000199","document":"wf-form4_157558454556059.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000199/wf-form4_157558454556059.xml","form_type":"4"}},{"id":3351550,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-12-05T22:22:43.000Z","date":"2019-12-03","kind":"exercise","acquired":true,"shares":4200,"price":24.26,"value":101892.0,"ownership":{"direct":true},"balance_after":16810,"source":{"system":"sec-edgar","filing":"0000831641-19-000199","document":"wf-form4_157558454556059.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000199/wf-form4_157558454556059.xml","form_type":"4"}},{"id":3361935,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)","published_at":"2019-11-22T21:35:52.000Z","date":"2019-11-21","kind":"grant","acquired":true,"shares":582,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each RSU represents the right to receive one share of common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The restricted stock units (RSUs) become 100% vested as to the shares underlying the RSUs on November 18, 2020."}],"balance_after":582,"derivative":{"exercise_price":0,"exercise_date":"2020-11-18","expiration_date":"2020-11-21","underlying":"COMMON STOCK","underlying_shares":582},"source":{"system":"sec-edgar","filing":"0000831641-19-000175","document":"wf-form4_157445853738953.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000175/wf-form4_157445853738953.xml","form_type":"4"}},{"id":3364894,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)","published_at":"2019-11-21T01:32:42.000Z","date":"2019-11-18","kind":"exercise","acquired":true,"shares":770,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Represents an award of restricted stock units (RSUs), each unit of which represents a contingent right to receive one share of Tetra Tech common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The restricted stock units (RSUs) vested on November 18, 2019."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The restricted stock units (RSUs) vested on November 18, 2019."}],"balance_after":0,"derivative":{"exercise_price":0,"exercise_date":"2019-11-18","expiration_date":"2019-11-18","underlying":"COMMON STOCK","underlying_shares":770},"source":{"system":"sec-edgar","filing":"0000831641-19-000133","document":"wf-form4_157429994479953.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000133/wf-form4_157429994479953.xml","form_type":"4"}},{"id":3364893,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-11-21T01:32:42.000Z","date":"2019-11-18","kind":"grant","acquired":true,"shares":3060,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares acquired pursuant to vesting of performance stock units (PSUs) earned under 2015 Equity Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Each PSU represented the right to receive one share of Tetra Tech common stock."}],"balance_after":12610,"source":{"system":"sec-edgar","filing":"0000831641-19-000133","document":"wf-form4_157429994479953.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000133/wf-form4_157429994479953.xml","form_type":"4"}},{"id":3364892,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-11-21T01:32:42.000Z","date":"2019-11-18","kind":"exercise","acquired":true,"shares":770,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares automatically acquired upon the vesting of restricted stock units (RSUs)."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Shares automatically acquired upon the vesting of restricted stock units (RSUs)."}],"balance_after":9550,"source":{"system":"sec-edgar","filing":"0000831641-19-000133","document":"wf-form4_157429994479953.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000133/wf-form4_157429994479953.xml","form_type":"4"}},{"id":3422490,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION (RIGHT TO BUY)","published_at":"2019-09-05T20:57:36.000Z","date":"2019-09-03","kind":"exercise","acquired":false,"shares":8000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option became exercisable as to 100% of the shares on the anniversary of the grant date."}],"balance_after":0,"derivative":{"exercise_price":25.27,"exercise_date":"2013-02-28","expiration_date":"2020-03-01","underlying":"COMMON STOCK","underlying_shares":8000},"source":{"system":"sec-edgar","filing":"0000831641-19-000073","document":"wf-form4_156771704125871.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000073/wf-form4_156771704125871.xml","form_type":"4"}},{"id":3422489,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-09-05T20:57:36.000Z","date":"2019-09-03","kind":"sale","acquired":false,"shares":8000,"price":80.624,"value":644992.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"$80.624 is an average price. Shares were sold at prices ranging from $80.62 to $80.78 per share."}],"balance_after":8780,"source":{"system":"sec-edgar","filing":"0000831641-19-000073","document":"wf-form4_156771704125871.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000073/wf-form4_156771704125871.xml","form_type":"4"}},{"id":3422488,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-09-05T20:57:36.000Z","date":"2019-09-03","kind":"exercise","acquired":true,"shares":8000,"price":25.27,"value":202160.0,"ownership":{"direct":true},"balance_after":16780,"source":{"system":"sec-edgar","filing":"0000831641-19-000073","document":"wf-form4_156771704125871.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000073/wf-form4_156771704125871.xml","form_type":"4"}},{"id":3643403,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2019-02-21T23:45:18.000Z","date":"2019-02-19","kind":"sale","acquired":false,"shares":3780,"price":58.46,"value":220978.8,"ownership":{"direct":true},"balance_after":8780,"source":{"system":"sec-edgar","filing":"0000831641-19-000028","document":"wf-form4_155079270434354.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164119000028/wf-form4_155079270434354.xml","form_type":"4"}},{"id":3755580,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2018-11-22T01:08:54.000Z","date":"2018-11-20","kind":"grant","acquired":true,"shares":2880,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares acquired pursuant to vesting of performance stock units (PSUs) earned under 2015 Equity Incentive Plan."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each PSU represented the right to receive one share of common stock."}],"balance_after":12560,"source":{"system":"sec-edgar","filing":"0000831641-18-000182","document":"wf-form4_154284891668556.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164118000182/wf-form4_154284891668556.xml","form_type":"4"}},{"id":3762340,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)","published_at":"2018-11-16T22:12:52.000Z","date":"2018-11-15","kind":"grant","acquired":true,"shares":770,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents an award of restricted stock units (RSUs), each unit of which represents a contingent right to receive one share of Tetra Tech common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The restricted stock units (RSUs) become vested as to 100% of the shares underlying the RSUs on November 18, 2019."}],"balance_after":770,"derivative":{"exercise_price":0,"exercise_date":"2019-11-18","expiration_date":"2019-11-18","underlying":"COMMON STOCK","underlying_shares":770},"source":{"system":"sec-edgar","filing":"0000831641-18-000110","document":"wf-form4_154240635507697.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164118000110/wf-form4_154240635507697.xml","form_type":"4"}},{"id":4035498,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2018-02-26T23:10:38.000Z","date":"2018-02-23","kind":"sale","acquired":false,"shares":4401,"price":50.1617,"value":220761.6417,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"$50.1617 is an average price. Shares were sold at prices ranging from $50.15 to $50.175 per share."}],"balance_after":9680,"source":{"system":"sec-edgar","filing":"0000831641-18-000027","document":"wf-form4_151968662414371.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164118000027/wf-form4_151968662414371.xml","form_type":"4"}},{"id":4153413,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2017-11-22T21:23:33.000Z","date":"2017-11-21","kind":"grant","acquired":true,"shares":1701,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Each performance share unit (\"PSU\") represents the right to receive one share of Common Stock.  The PSUs awarded cliff-vest after a 3-year performance period.  The Performance Period was the Company's fiscal years 2015, 2016 and 2017.  The number of PSUs earned by the Awardee for the Performance Period was determined at the end of the Performance Period by measuring relative total shareholder return (\"TSR\"), with equal weight given to the selected industry peer group and to the S&P 1000.  The TSR peer group performance percentile was 89%, and the TSR S&P 1000 performance percentile was 82%.  Straight line interpolation determined the vesting credit percentage.  Therefore, 189% of the 900 PSUs awarded on November 21, 2014 were earned and vested on November 21, 2017."}],"balance_after":14081,"source":{"system":"sec-edgar","filing":"0000831641-17-000097","document":"wf-form4_151138579979414.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164117000097/wf-form4_151138579979414.xml","form_type":"4"}},{"id":4153412,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2017-11-22T21:23:33.000Z","date":"2017-11-21","kind":"grant","acquired":true,"shares":1800,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each performance share unit (\"PSU\") represents the right to receive one share of Common Stock.  The PSUs awarded cliff-vest after a 3-year performance period.  The Performance Period was the Company's fiscal years 2015, 2016 and 2017.  The number of PSUs earned by the Awardee was determined at the end of the Performance Period by measuring earnings per share (\"EPS\") growth, which was  35% year-over-year growth.  Therefore, 200% of the 900 PSUs awarded on November 21, 2014 were earned and vested on November 21, 2017."}],"balance_after":12380,"source":{"system":"sec-edgar","filing":"0000831641-17-000097","document":"wf-form4_151138579979414.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164117000097/wf-form4_151138579979414.xml","form_type":"4"}},{"id":4155402,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION (RIGHT TO BUY)","published_at":"2017-11-21T22:14:00.000Z","date":"2017-11-17","kind":"grant","acquired":true,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The option becomes exercisable as to 100% of the shares on the anniversary of the grant date."}],"balance_after":4200,"derivative":{"exercise_price":47.95,"exercise_date":"2018-11-17","expiration_date":"2027-11-17","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0000831641-17-000054","document":"wf-form4_151130242606640.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164117000054/wf-form4_151130242606640.xml","form_type":"4"}},{"id":4155401,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2017-11-21T22:14:00.000Z","date":"2017-11-17","kind":"grant","acquired":true,"shares":900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"900 restricted stock units (RSUs) were awarded to the reporting person on November 17, 2017.  The RSUs will become vested as to 100% of the shares on November 18, 2018."}],"balance_after":10580,"source":{"system":"sec-edgar","filing":"0000831641-17-000054","document":"wf-form4_151130242606640.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000083164117000054/wf-form4_151130242606640.xml","form_type":"4"}},{"id":4465146,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION","published_at":"2017-02-08T01:08:43.000Z","date":"2017-02-06","kind":"exercise","acquired":false,"shares":8000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each stock option became exercisable as to 100% of the shares on the anniversary of its grant date."}],"balance_after":0,"derivative":{"exercise_price":22.81,"exercise_date":"2012-03-01","expiration_date":"2021-03-02","underlying":"COMMON STOCK","underlying_shares":8000},"source":{"system":"sec-edgar","filing":"0001183870-17-000002","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387017000002/edgar.xml","form_type":"4"}},{"id":4465145,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION","published_at":"2017-02-08T01:08:43.000Z","date":"2017-02-06","kind":"exercise","acquired":false,"shares":8000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each stock option became exercisable as to 100% of the shares on the anniversary of its grant date."}],"balance_after":0,"derivative":{"exercise_price":22.4,"exercise_date":"2010-03-01","expiration_date":"2019-03-01","underlying":"COMMON STOCK","underlying_shares":8000},"source":{"system":"sec-edgar","filing":"0001183870-17-000002","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387017000002/edgar.xml","form_type":"4"}},{"id":4465144,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2017-02-08T01:08:43.000Z","date":"2017-02-06","kind":"sale","acquired":false,"shares":1740,"price":41.2743,"value":71817.282,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"$41.2743 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $41.25 to $41.28."}],"balance_after":9680,"source":{"system":"sec-edgar","filing":"0001183870-17-000002","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387017000002/edgar.xml","form_type":"4"}},{"id":4465143,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2017-02-08T01:08:43.000Z","date":"2017-02-06","kind":"sale","acquired":false,"shares":16000,"price":41.342,"value":661472.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"$41.342 is a weighted average price.  These shares were sold in multiple transactions at prices ranging from $41.25 to $41.45."}],"balance_after":11420,"source":{"system":"sec-edgar","filing":"0001183870-17-000002","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387017000002/edgar.xml","form_type":"4"}},{"id":4465142,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2017-02-08T01:08:43.000Z","date":"2017-02-06","kind":"exercise","acquired":true,"shares":8000,"price":22.81,"value":182480.0,"ownership":{"direct":true},"balance_after":27420,"source":{"system":"sec-edgar","filing":"0001183870-17-000002","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387017000002/edgar.xml","form_type":"4"}},{"id":4465141,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2017-02-08T01:08:43.000Z","date":"2017-02-06","kind":"exercise","acquired":true,"shares":8000,"price":22.4,"value":179200.0,"ownership":{"direct":true},"balance_after":19420,"source":{"system":"sec-edgar","filing":"0001183870-17-000002","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387017000002/edgar.xml","form_type":"4"}},{"id":4545998,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"STOCK OPTION","published_at":"2016-11-22T22:42:45.000Z","date":"2016-11-18","kind":"grant","acquired":true,"shares":4200,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option becomes exercisable as to 100% of the shares on the anniversary of the grant date."}],"balance_after":4200,"derivative":{"exercise_price":40.8,"exercise_date":"2017-11-20","expiration_date":"2026-11-20","underlying":"COMMON STOCK","underlying_shares":4200},"source":{"system":"sec-edgar","filing":"0001183870-16-000008","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387016000008/edgar.xml","form_type":"4"}},{"id":4545997,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2016-11-22T22:42:45.000Z","date":"2016-11-22","kind":"grant","acquired":true,"shares":240,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"In accordance with our compensation policy for Directors, 140% of the applicable restricted stock installment granted on 11/22/2013 became vested on 11/22/2016, and 240 additional shares were issued to the reporting person."}],"balance_after":11420,"source":{"system":"sec-edgar","filing":"0001183870-16-000008","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387016000008/edgar.xml","form_type":"4"}},{"id":4545996,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2016-11-22T22:42:45.000Z","date":"2016-11-18","kind":"grant","acquired":true,"shares":900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"900 restricted stock units (RSUs) were awarded to the reporting person on November 18, 2016.  The RSUs will become vested as to 100% of the shares on the anniversary of the grant date."}],"balance_after":11180,"source":{"system":"sec-edgar","filing":"0001183870-16-000008","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387016000008/edgar.xml","form_type":"4"}},{"id":4551494,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"RESTRICTED STOCK UNITS","published_at":"2016-11-18T02:37:32.000Z","date":"2016-11-16","kind":"exercise","acquired":false,"shares":225,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 16, 2016, 225 restricted stock units (RSUs) awarded in November 2012 vested.  The shares of common stock into which such vested RSUs converted are reported in Table I of this Form 4."}],"balance_after":0,"derivative":{"exercise_price":0,"exercise_date":"2016-11-16","expiration_date":"2016-11-16","underlying":"COMMON STOCK","underlying_shares":225},"source":{"system":"sec-edgar","filing":"0001183870-16-000006","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387016000006/edgar.xml","form_type":"4"}},{"id":4551493,"issuer":{"id":3570,"kind":"organization","name":"TETRA TECH INC"},"owners":[{"id":55469,"kind":"person","name":"HADEN PATRICK C","position":1,"cik":"0001183870","reported_name":"HADEN PATRICK C","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"COMMON STOCK","published_at":"2016-11-18T02:37:32.000Z","date":"2016-11-16","kind":"exercise","acquired":true,"shares":225,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents the conversion upon vesting of restricted stock units into common stock."}],"balance_after":10280,"source":{"system":"sec-edgar","filing":"0001183870-16-000006","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/831641/000118387016000006/edgar.xml","form_type":"4"}}]}