MBIA INC (MBI) Institutional Buying Activity
Institutional investors tracked by InsiderSet increased exposure to MBIA INC (MBI) during the quarter ended March 31, 2026 through a combination of new purchases and expanded existing positions disclosed in SEC Form 13F filings.
The largest institutional buyer of MBI during the latest reporting period was Kahn Brothers Group, which increased its reported MBI position by approximately $39.50M based on quarter-end filing values. Several additional hedge funds and long-term asset managers also reported meaningful increases in MBI exposure during the quarter.
Institutional buying activity can provide insight into investor conviction, sector allocation trends, and smart money positioning toward MBIA INC (MBI). InsiderSet tracks quarterly accumulation trends, new institutional positions, ownership increases, and estimated performance of newly disclosed holdings using SEC filing data and recent market prices.
The investors highlighted on this page collectively added approximately $112.77M in reported MBI exposure during the latest filing period, reflecting continued institutional interest in MBIA INC's growth initiatives and strategic positioning.
| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q1 2026 | Kahn Brothers Group | Buy | 1,027,650 | 2,056,434 | $12,153,524 |
| Q1 2026 | Renaissance Technologies LLC | Buy | 268,100 | 409,892 | $2,422,462 |
| Q4 2025 | Renaissance Technologies LLC | Buy | 81,792 | 141,792 | $1,015,231 |
| Q3 2025 | Kahn Brothers Group | Buy | 1,019,194 | 1,029,794 | $7,671,965 |
| Q2 2025 | Renaissance Technologies LLC | Buy | 54,500 | 133,600 | $579,824 |
| Q3 2024 | Renaissance Technologies LLC | Buy | 281,104 | 400,278 | $1,428,992 |
| Q2 2024 | Kahn Brothers Group | Buy | 393,650 | 5,570,263 | $30,580,277 |
| Q2 2024 | Chou Associates Management | Buy | 121,470 | 321,000 | $1,762,290 |
| Q2 2024 | Renaissance Technologies LLC | Buy | 96,600 | 119,174 | $654,265 |
| Q1 2024 | Kahn Brothers Group | Buy | 347,007 | 5,176,613 | $34,993,451 |
| Q4 2023 | Renaissance Technologies LLC | Buy | 159,088 | 267,647 | $1,638 |
| Q4 2023 | Kahn Brothers Group | Buy | 20,222 | 4,829,606 | $29,556,809 |
| Q3 2023 | Renaissance Technologies LLC | Buy | 54,585 | 108,559 | $783 |
| Q2 2023 | Kahn Brothers Group | Buy | 103,933 | 4,838,495 | $41,804,606 |
| Q4 2022 | Renaissance Technologies LLC | Buy | 89,700 | 171,074 | $2,198 |
| Q4 2022 | Kahn Brothers Group | Buy | 6,808 | 4,817,282 | $61,902,114 |
| Q2 2022 | Kahn Brothers Group | Buy | 7,159 | 4,836,404 | $59,729,140 |
| Q4 2021 | Renaissance Technologies LLC | Buy | 43,400 | 140,574 | $2,220 |
| Q4 2021 | Kahn Brothers Group | Buy | 11,067 | 4,978,900 | $78,616,832 |
| Q2 2021 | Kahn Brothers Group | Buy | 148,563 | 5,043,329 | $55,476,619 |
| Q1 2021 | Chou Associates Management | Buy | 33,001 | 652,531 | $4,659 |
| Q4 2020 | Kahn Brothers Group | Buy | 259,517 | 4,907,791 | $32,293,264 |
| Q1 2020 | Renaissance Technologies LLC | Buy | 128,800 | 785,792 | $5,611 |
| Q4 2019 | Renaissance Technologies LLC | Buy | 428,618 | 656,992 | $6,110 |
| Q2 2019 | Kahn Brothers Group | Buy | 1,202,254 | 5,614,736 | $52,273,192 |
| Q1 2018 | Kahn Brothers Group | Buy | 35,932 | 4,625,960 | $42,836,390 |
| Q4 2017 | Kahn Brothers Group | Buy | 1,613,223 | 4,590,028 | $33,599,005 |
| Q2 2017 | Renaissance Technologies LLC | Buy | 517,879 | 774,879 | $7,307 |
| Q2 2017 | Miller Value Partners | Buy | 70,000 | 70,000 | $660 |
| Q2 2017 | Kahn Brothers Group | Buy | 57,400 | 4,483,598 | $42,280,330 |
Frequently asked questions about MBI activity
Which institutional owners are buying MBI?
Institutional owners buying MBI include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in MBI activity?
"Buy" means an investor increased their reported position in MBI compared to the prior reporting period. This reflects growing exposure to MBIA INC (MBI) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in MBI increasing?
Institutional interest in MBI can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.