MBIA INC (MBI) Stock Institutional Trading Activity
MBIA INC (MBI) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Kahn Brothers Group, Chou Associates Management, Miller Value Partners, and Fairfax Financial Holdings. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q3 2018 | Chou Associates Management | Sell | -122,700 | 958,097 | $10,242 |
| Q2 2018 | Kahn Brothers Group | Sell | -11,900 | 4,614,060 | $41,711,102 |
| Q1 2018 | Kahn Brothers Group | Buy | 35,932 | 4,625,960 | $42,836,390 |
| Q1 2018 | Miller Value Partners | Sell | -2,400 | 67,600 | $626 |
| Q4 2017 | Kahn Brothers Group | Buy | 1,613,223 | 4,590,028 | $33,599,005 |
| Q3 2017 | Kahn Brothers Group | Sell | -1,506,793 | 2,976,805 | $37,727,498 |
| Q3 2017 | Renaissance Technologies LLC | Sell | -245,379 | 529,500 | $4,607 |
| Q2 2017 | Kahn Brothers Group | Buy | 57,400 | 4,483,598 | $42,280,330 |
| Q2 2017 | Miller Value Partners | Buy | 70,000 | 70,000 | $660 |
| Q2 2017 | Renaissance Technologies LLC | Buy | 517,879 | 774,879 | $7,307 |
| Q1 2017 | Kahn Brothers Group | Buy | 58,034 | 4,426,198 | $37,489,898 |
| Q1 2017 | Renaissance Technologies LLC | Sell | -888,600 | 257,000 | $2,177 |
| Q4 2016 | Kahn Brothers Group | Buy | 23,000 | 4,368,164 | $46,739,355 |
| Q4 2016 | Renaissance Technologies LLC | Buy | 1,023,600 | 1,145,600 | $12,258 |
| Q3 2016 | Kahn Brothers Group | Sell | -10,043 | 4,345,164 | $33,848,828 |
| Q3 2016 | Renaissance Technologies LLC | Sell | -273,520 | 122,000 | $950 |
| Q2 2016 | Kahn Brothers Group | Sell | -34,100 | 4,355,207 | $29,746,064 |
| Q1 2016 | Kahn Brothers Group | Sell | -19,917 | 4,389,307 | $38,845,367 |
| Q4 2015 | Kahn Brothers Group | Sell | -76,732 | 4,409,224 | $28,571,771 |
| Q3 2015 | Kahn Brothers Group | Buy | 1,024,600 | 4,485,956 | $27,274,612 |
| Q3 2015 | Fairfax Financial Holdings | Buy | 35,000 | 105,000 | $638 |
| Q2 2015 | Kahn Brothers Group | Buy | 1,499,964 | 3,461,356 | $20,802,750 |
| Q2 2015 | Fairfax Financial Holdings | Buy | 20,000 | 70,000 | $421 |
| Q1 2015 | Kahn Brothers Group | Sell | -20,450 | 1,961,392 | $18,240,946 |
| Q1 2015 | Fairfax Financial Holdings | Buy | 20,000 | 50,000 | $465 |
| Q4 2014 | Kahn Brothers Group | Sell | -355,597 | 1,981,842 | $18,906,772 |
| Q4 2014 | Renaissance Technologies LLC | Buy | 275,896 | 395,520 | $3,773 |
| Q3 2014 | Kahn Brothers Group | Sell | -185,300 | 2,337,439 | $21,457,690 |
| Q3 2014 | Renaissance Technologies LLC | Sell | -1,179,576 | 119,624 | $1,098 |
| Q2 2014 | Kahn Brothers Group | Sell | -18,500 | 2,522,739 | $27,851,039 |
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.