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Segment Information - Schedule of Business Segment Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | [1]
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Interest income | $ 299,531 |  | $ 248,643 | $ 855,961 |  | $ 678,800 |
Interest expense | (284,537) |  | (223,145) | (799,191) |  | (603,799) |
Net Interest Income | 14,994 |  | 25,498 | 56,770 |  | 75,001 |
Non-Interest Income |  |  |  |  |  |  |
Mortgage banking activities, net, excluding risk management derivatives | 42,540 |  | 4,967 | 50,473 |  | 45,235 |
Risk management derivatives (losses) gains, net | (2,408) |  | 34,602 | 63,569 |  | 27,814 |
Total Mortgage banking activities, net | 40,132 |  | 39,569 | 114,042 |  | 73,049 |
Investment fair value changes, net | (6,971) |  | (12,202) | (96,863) |  | 10,733 |
HEI income (loss), net | 454 |  | 10,727 | (2,279) |  | 35,696 |
Servicing income, net | 1,416 |  | 251 | 6,431 |  | 8,025 |
Fee income (loss), net | 4,579 |  | 4,788 | 9,139 |  | 7,452 |
Other income (loss), net | (183) |  | 880 | 1,719 |  | 1,142 |
Realized gains, net | (48) |  | 211 | 1,159 |  | 620 |
Total non-interest income, net | 39,379 |  | 44,224 | 33,348 |  | 136,717 |
General and administrative expenses | (38,707) |  | (36,008) | (113,161) |  | (103,861) |
Portfolio management costs | (6,981) |  | (6,356) | (23,500) |  | (14,817) |
Loan acquisition costs | (4,355) |  | (3,176) | (12,704) |  | (9,077) |
Other expenses | (5,681) |  | (2,228) | (13,625) |  | (10,766) |
(Provision for) benefit from income taxes | (6,353) |  | (7,128) | (17,177) |  | (12,575) |
Net Income (Loss) | (7,704) |  | 14,826 | (90,049) |  | 60,622 |
Total Assets | 22,600,766 | [1] | 18,427,426 | 22,600,766 | [1] | 18,427,426 | $ 18,258,344
Investment fair value changes, net, excluding risk management derivatives |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | (5,061) |  | (3,051) | (132,574) |  | 10,474 |
Risk management derivatives gains (losses), net |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | (1,910) |  | (9,151) | 35,711 |  | 259 |
Sequoia Mortgage Banking |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Total Mortgage banking activities, net | 28,719 |  | 26,715 | 75,266 |  | 40,787 |
CoreVest Mortgage Banking |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Total Mortgage banking activities, net | 11,413 |  | 12,854 | 38,776 |  | 32,262 |
Operating Segments | Sequoia Mortgage Banking |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Interest income | 47,890 |  | 26,318 | 116,594 |  | 61,728 |
Interest expense | (26,657) |  | (16,770) | (61,498) |  | (34,958) |
Net Interest Income | 21,233 |  | 9,548 | 55,096 |  | 26,770 |
Non-Interest Income |  |  |  |  |  |  |
Mortgage banking activities, net, excluding risk management derivatives | 31,145 |  | (7,336) | 9,877 |  | 15,666 |
Risk management derivatives (losses) gains, net | (2,426) |  | 34,051 | 65,389 |  | 25,121 |
Total Mortgage banking activities, net | 28,719 |  | 26,715 | 75,266 |  | 40,787 |
Investment fair value changes, net | 0 |  | 0 | 0 |  | 0 |
HEI income (loss), net | 0 |  | 0 | 0 |  | 0 |
Servicing income, net | 0 |  | 0 | 0 |  | 0 |
Fee income (loss), net | 0 |  | 0 | 0 |  | 0 |
Other income (loss), net | 0 |  | 0 | 0 |  | 0 |
Realized gains, net | 0 |  | 0 | 0 |  | 0 |
Total non-interest income, net | 28,719 |  | 26,715 | 75,266 |  | 40,787 |
General and administrative expenses | (7,774) |  | (5,240) | (21,325) |  | (14,986) |
Portfolio management costs | 0 |  | 0 | 0 |  | 0 |
Loan acquisition costs | (2,395) |  | (1,291) | (4,733) |  | (2,843) |
Other expenses | 0 |  | 0 | 0 |  | 0 |
(Provision for) benefit from income taxes | (5,464) |  | (6,977) | (22,015) |  | (10,031) |
Net Income (Loss) | 34,319 |  | 22,755 | 82,289 |  | 39,697 |
Total Assets | 2,659,250 |  | 1,543,380 | 2,659,250 |  | 1,543,380 |
Operating Segments | Sequoia Mortgage Banking | Investment fair value changes, net, excluding risk management derivatives |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | 0 |  | 0 | 0 |  | 0 |
Operating Segments | Sequoia Mortgage Banking | Risk management derivatives gains (losses), net |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | 0 |  | 0 | 0 |  | 0 |
Operating Segments | CoreVest Mortgage Banking |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Interest income | 4,052 |  | 4,868 | 12,182 |  | 15,647 |
Interest expense | (2,554) |  | (3,099) | (6,846) |  | (11,480) |
Net Interest Income | 1,498 |  | 1,769 | 5,336 |  | 4,167 |
Non-Interest Income |  |  |  |  |  |  |
Mortgage banking activities, net, excluding risk management derivatives | 11,395 |  | 12,303 | 40,596 |  | 29,569 |
Risk management derivatives (losses) gains, net | 18 |  | 551 | (1,820) |  | 2,693 |
Total Mortgage banking activities, net | 11,413 |  | 12,854 | 38,776 |  | 32,262 |
Investment fair value changes, net | 0 |  | 0 | 0 |  | 0 |
HEI income (loss), net | 0 |  | 0 | 0 |  | 0 |
Servicing income, net | 0 |  | 0 | 0 |  | 0 |
Fee income (loss), net | 5,247 |  | 5,434 | 11,109 |  | 7,233 |
Other income (loss), net | (928) |  | 0 | 1,468 |  | 0 |
Realized gains, net | 0 |  | 0 | 0 |  | 0 |
Total non-interest income, net | 15,732 |  | 18,288 | 51,353 |  | 39,495 |
General and administrative expenses | (9,971) |  | (9,306) | (30,786) |  | (30,407) |
Portfolio management costs | 0 |  | 0 | 0 |  | 0 |
Loan acquisition costs | (1,804) |  | (1,885) | (7,816) |  | (5,982) |
Other expenses | (2,011) |  | (2,202) | (6,416) |  | (7,210) |
(Provision for) benefit from income taxes | 48 |  | (981) | 975 |  | 706 |
Net Income (Loss) | 3,492 |  | 5,683 | 12,646 |  | 769 |
Total Assets | 393,790 |  | 357,432 | 393,790 |  | 357,432 |
Operating Segments | CoreVest Mortgage Banking | Investment fair value changes, net, excluding risk management derivatives |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | 0 |  | 0 | 0 |  | 0 |
Operating Segments | CoreVest Mortgage Banking | Risk management derivatives gains (losses), net |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | 0 |  | 0 | 0 |  | 0 |
Operating Segments | Redwood Investments |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Interest income | 225,521 |  | 177,136 | 646,834 |  | 471,952 |
Interest expense | (207,939) |  | (150,238) | (585,540) |  | (397,286) |
Net Interest Income | 17,582 |  | 26,898 | 61,294 |  | 74,666 |
Non-Interest Income |  |  |  |  |  |  |
Mortgage banking activities, net, excluding risk management derivatives | 0 |  | 0 | 0 |  | 0 |
Risk management derivatives (losses) gains, net | 0 |  | 0 | 0 |  | 0 |
Total Mortgage banking activities, net | 0 |  | 0 | 0 |  | 0 |
Investment fair value changes, net | (1,742) |  | (9,127) | (7,117) |  | 31,511 |
HEI income (loss), net | 745 |  | 32 | 926 |  | 32 |
Servicing income, net | 1,416 |  | 251 | 6,431 |  | 8,025 |
Fee income (loss), net | 270 |  | 64 | 823 |  | 797 |
Other income (loss), net | 392 |  | 932 | 1,156 |  | 2,139 |
Realized gains, net | 0 |  | 211 | 1,207 |  | 525 |
Total non-interest income, net | 1,081 |  | (7,637) | 3,426 |  | 43,029 |
General and administrative expenses | (1,599) |  | (1,861) | (4,477) |  | (6,024) |
Portfolio management costs | (3,524) |  | (1,550) | (8,178) |  | (3,760) |
Loan acquisition costs | 0 |  | 0 | 0 |  | (14) |
Other expenses | (3,170) |  | (26) | (6,709) |  | (3,556) |
(Provision for) benefit from income taxes | (30) |  | 606 | 1,841 |  | (3,454) |
Net Income (Loss) | 10,340 |  | 16,430 | 47,197 |  | 100,887 |
Total Assets | 16,906,766 |  | 12,815,147 | 16,906,766 |  | 12,815,147 |
Operating Segments | Redwood Investments | Investment fair value changes, net, excluding risk management derivatives |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | (1,682) |  | (9,127) | (51,307) |  | 33,478 |
Operating Segments | Redwood Investments | Risk management derivatives gains (losses), net |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | (60) |  | 0 | 44,190 |  | (1,967) |
Operating Segments | Legacy Investments |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Interest income | 21,476 |  | 39,921 | 79,077 |  | 126,744 |
Interest expense | (30,528) |  | (38,445) | (95,741) |  | (117,131) |
Net Interest Income | (9,052) |  | 1,476 | (16,664) |  | 9,613 |
Non-Interest Income |  |  |  |  |  |  |
Mortgage banking activities, net, excluding risk management derivatives | 0 |  | 0 | 0 |  | 0 |
Risk management derivatives (losses) gains, net | 0 |  | 0 | 0 |  | 0 |
Total Mortgage banking activities, net | 0 |  | 0 | 0 |  | 0 |
Investment fair value changes, net | (6,741) |  | (2,839) | (91,046) |  | (19,741) |
HEI income (loss), net | (291) |  | 10,695 | (3,205) |  | 35,664 |
Servicing income, net | 0 |  | 0 | 0 |  | 0 |
Fee income (loss), net | (938) |  | (865) | (2,793) |  | (733) |
Other income (loss), net | (532) |  | 0 | (532) |  | 0 |
Realized gains, net | 0 |  | 0 | 0 |  | 0 |
Total non-interest income, net | (8,502) |  | 6,991 | (97,576) |  | 15,190 |
General and administrative expenses | (23) |  | 0 | (95) |  | (53) |
Portfolio management costs | (3,426) |  | (4,791) | (15,291) |  | (11,017) |
Loan acquisition costs | (156) |  | 0 | (155) |  | (238) |
Other expenses | (500) |  | 0 | (500) |  | 0 |
(Provision for) benefit from income taxes | (571) |  | 0 | 1,964 |  | 0 |
Net Income (Loss) | (22,230) |  | 3,676 | (128,317) |  | 13,495 |
Total Assets | 2,305,179 |  | 3,337,646 | 2,305,179 |  | 3,337,646 |
Operating Segments | Legacy Investments | Investment fair value changes, net, excluding risk management derivatives |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | (4,891) |  | 6,312 | (82,567) |  | (21,967) |
Operating Segments | Legacy Investments | Risk management derivatives gains (losses), net |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | (1,850) |  | (9,151) | (8,479) |  | 2,226 |
Corporate/ Other |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |
Interest income | 592 |  | 400 | 1,274 |  | 2,729 |
Interest expense | (16,859) |  | (14,593) | (49,566) |  | (42,944) |
Net Interest Income | (16,267) |  | (14,193) | (48,292) |  | (40,215) |
Non-Interest Income |  |  |  |  |  |  |
Mortgage banking activities, net, excluding risk management derivatives | 0 |  | 0 | 0 |  | 0 |
Risk management derivatives (losses) gains, net | 0 |  | 0 | 0 |  | 0 |
Total Mortgage banking activities, net | 0 |  | 0 | 0 |  | 0 |
Investment fair value changes, net | 1,512 |  | (236) | 1,300 |  | (1,037) |
HEI income (loss), net | 0 |  | 0 | 0 |  | 0 |
Servicing income, net | 0 |  | 0 | 0 |  | 0 |
Fee income (loss), net | 0 |  | 155 | 0 |  | 155 |
Other income (loss), net | 885 |  | (52) | (373) |  | (997) |
Realized gains, net | (48) |  | 0 | (48) |  | 95 |
Total non-interest income, net | 2,349 |  | (133) | 879 |  | (1,784) |
General and administrative expenses | (19,340) |  | (19,601) | (56,478) |  | (52,391) |
Portfolio management costs | (31) |  | (15) | (31) |  | (40) |
Loan acquisition costs | 0 |  | 0 | 0 |  | 0 |
Other expenses | 0 |  | 0 | 0 |  | 0 |
(Provision for) benefit from income taxes | (336) |  | 224 | 58 |  | 204 |
Net Income (Loss) | (33,625) |  | (33,718) | (103,864) |  | (94,226) |
Total Assets | 335,781 |  | 373,821 | 335,781 |  | 373,821 |
Corporate/ Other | Investment fair value changes, net, excluding risk management derivatives |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | 1,512 |  | (236) | 1,300 |  | (1,037) |
Corporate/ Other | Risk management derivatives gains (losses), net |  |  |  |  |  |  |
Non-Interest Income |  |  |  |  |  |  |
Investment fair value changes, net | $ 0 |  | $ 0 | $ 0 |  | $ 0 |
[1] | Our consolidated balance sheets include assets of consolidated variable interest entities (“VIEs”) that can only be used to settle obligations of these VIEs and liabilities of consolidated VIEs for which creditors do not have recourse to Redwood Trust, Inc. or its affiliates. At September 30, 2025 and December 31, 2024, assets of consolidated VIEs totaled $18,284,133 and $14,654,942, respectively. At September 30, 2025 and December 31, 2024, liabilities of consolidated VIEs totaled $17,164,811 and $13,620,239, respectively. See Note 16 for further discussion.

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