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These shares were sold in multiple transactions at prices ranging from $11.6451 to $11.65, inclusive. The Reporting Person undertakes to\nprovide, upon request by the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price for all\ntransactions reported on this Form 4."}],"balance_after":70047,"source":{"system":"sec-edgar","filing":"0001061630-26-000079","document":"wk-form4_1790898567.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1061630/000106163026000079/wk-form4_1790898567.xml","form_type":"4"}},{"id":4624010,"issuer":{"id":4404,"kind":"organization","name":"BLACKSTONE MORTGAGE TRUST, INC."},"owners":[{"id":34188,"kind":"person","name":"Pena Fernando Austin","position":1,"cik":"0002089544","reported_name":"Pena Fernando Austin","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Class A Common Stock","published_at":"2026-09-18T21:31:30.000Z","date":"2026-09-17","kind":"sale","planned":true,"acquired":false,"shares":1127,"price":13.4241,"value":15128.9607,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 26, 2026 to satisfy certain tax withholding related obligations in connection with the vesting of previously granted restricted stock awards."}],"balance_after":71772,"source":{"system":"sec-edgar","filing":"0001061630-26-000076","document":"wk-form4_1789767088.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1061630/000106163026000076/wk-form4_1789767088.xml","form_type":"4"}},{"id":721788,"issuer":{"id":4404,"kind":"organization","name":"BLACKSTONE MORTGAGE TRUST, INC."},"owners":[{"id":34188,"kind":"person","name":"Pena Fernando Austin","position":1,"cik":"0002089544","reported_name":"Pena Fernando Austin","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Class A Common Stock","published_at":"2026-07-01T22:14:17.000Z","date":"2026-06-30","kind":"sale","planned":true,"acquired":false,"shares":1670,"price":17.0713,"value":28509.071,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to two Rule 10b5-1 trading plans adopted on March 5, 2024 and February 28, 2025 to satisfy certain tax withholding related obligations in connection with the vesting of previously granted restricted stock awards."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.0604 to $17.08, inclusive. The Reporting Person undertakes to\nprovide, upon request by the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price for all\ntransactions reported on this Form 4."}],"balance_after":72899,"source":{"system":"sec-edgar","filing":"0001061630-26-000051","document":"wk-form4_1782944055.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1061630/000106163026000051/wk-form4_1782944055.xml","form_type":"4"}},{"id":724656,"issuer":{"id":4404,"kind":"organization","name":"BLACKSTONE MORTGAGE TRUST, INC."},"owners":[{"id":34188,"kind":"person","name":"Pena Fernando Austin","position":1,"cik":"0002089544","reported_name":"Pena Fernando Austin","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Class A Common Stock","published_at":"2026-06-29T21:49:01.000Z","date":"2026-06-25","kind":"sale","planned":true,"acquired":false,"shares":2398,"price":17.48,"value":41917.04,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 26, 2026 to satisfy certain tax withholding related obligations in connection with the vesting of previously granted restricted stock awards."}],"balance_after":74569,"source":{"system":"sec-edgar","filing":"0001061630-26-000047","document":"wk-form4_1782769738.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1061630/000106163026000047/wk-form4_1782769738.xml","form_type":"4"}},{"id":823357,"issuer":{"id":4404,"kind":"organization","name":"BLACKSTONE MORTGAGE TRUST, INC."},"owners":[{"id":34188,"kind":"person","name":"Pena Fernando Austin","position":1,"cik":"0002089544","reported_name":"Pena Fernando Austin","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Class A Common Stock","published_at":"2026-04-01T22:10:48.000Z","date":"2026-03-31","kind":"sale","planned":true,"acquired":false,"shares":1666,"price":18.8828,"value":31458.7448,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted on March 5, 2024 and February 28, 2025 to satisfy certain tax withholding related obligations in connection with the vesting of previously granted restricted stock awards."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.88 to $18.885, inclusive. The Reporting Person undertakes to provide, upon request by the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price for all transactions reported on this Form 4."}],"balance_after":76967,"source":{"system":"sec-edgar","filing":"0002089544-26-000004","document":"wk-form4_1775081445.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1061630/000208954426000004/wk-form4_1775081445.xml","form_type":"4"}},{"id":955596,"issuer":{"id":4404,"kind":"organization","name":"BLACKSTONE MORTGAGE TRUST, INC."},"owners":[{"id":34188,"kind":"person","name":"Pena Fernando Austin","position":1,"cik":"0002089544","reported_name":"Pena Fernando Austin","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Class A Common Stock","published_at":"2026-01-02T22:21:56.000Z","date":"2025-12-31","kind":"sale","planned":true,"acquired":false,"shares":3131,"price":19.2379,"value":60233.8649,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to Rule 10b5-1 trading plans adopted on March 3, 2023, March 5, 2024, and February 28, 2025 to satisfy certain tax withholding related obligations in\nconnection with the vesting of previously granted restricted stock awards."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.235 to $19.245, inclusive. The Reporting Person undertakes\nto provide, upon request by the Securities and Exchange Commission staff, the issuer or a security holder of the issuer, full information regarding the number of shares sold at each separate price for all\ntransactions reported on this Form 4."}],"balance_after":78633,"source":{"system":"sec-edgar","filing":"0002089544-26-000002","document":"wk-form4_1767392513.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1061630/000208954426000002/wk-form4_1767392513.xml","form_type":"4"}},{"id":965804,"issuer":{"id":4404,"kind":"organization","name":"BLACKSTONE MORTGAGE TRUST, INC."},"owners":[{"id":34188,"kind":"person","name":"Pena Fernando Austin","position":1,"cik":"0002089544","reported_name":"Pena Fernando Austin","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President"}}],"security":"Class A Common Stock","published_at":"2025-12-17T23:46:05.000Z","date":"2025-12-15","kind":"grant","planned":false,"acquired":true,"shares":36843,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of restricted class A common stock of the Issuer granted pursuant to the Issuer's Stock Incentive Plan."}],"balance_after":81764,"source":{"system":"sec-edgar","filing":"0002089544-25-000002","document":"wk-form4_1766015162.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1061630/000208954425000002/wk-form4_1766015162.xml","form_type":"4"}}]}