MBI · Insider trading · 13F holders · Congress trades
Mbia Inc (MBI)
Who is buying and selling MBI: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 7
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
MBI at a glance
- No open-market insider purchases or sales of MBI were filed in the last 90 days.
- 7 13F filers hold MBI among their 50 largest positions, worth $58.0M combined, including Kahn Brothers Group and Francis Chou. The biggest bets by portfolio weight are Kahn Brothers Group (4.3%), Valueworks LLC (2.7%) and Wolf Hill Capital Management, LP (1.3%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
- No member of Congress has disclosed a trade in MBI.
MBI insider trading
No open-market insider purchases or sales of MBI were filed in the last 90 days.
Who owns MBI? Hedge funds and superinvestors
7 13F filers hold MBI among their 50 largest positions, worth $58.0M combined, including Kahn Brothers Group and Francis Chou. The biggest bets by portfolio weight are Kahn Brothers Group (4.3%), Valueworks LLC (2.7%) and Wolf Hill Capital Management, LP (1.3%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
Superinvestors holding MBI: Kahn Brothers Group 4.3% · Francis Chou 1.0%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Kahn Brothers GroupSuperinvestor · Investment manager | 4.3% | $27.5M | 4,213,920 | +104.9% shares | Q2 2026 |
| Wolf Hill Capital Management, LPHedge fund | 1.3% | $13.8M | 2,118,014 | -16.8% shares | Q2 2026 |
| Valueworks LLCHedge fund | 2.7% | $12.8M | 1,967,228 | +1.8% shares | Q2 2026 |
| Francis ChouSuperinvestor · Investment manager | 1.0% | $2.1M | 321,000 | +0.0% shares | Q2 2026 |
| Alta Fundamental Advisers LLCInstitutional asset manager | 0.4% | $969K | 148,662 | +0.0% shares | Q2 2026 |
| Bluefin Capital Management, LLCHedge fund | 0.2% | $750K | 115,006 | +18.6% shares | Q2 2026 |
| 46 Peaks LLCWealth manager | 0.1% | $126K | 19,398 | New | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 7). Screen MBI in the grand portfolio →
MBI stock trades by members of Congress
No member of Congress has disclosed a trade in MBI.
MBI questions and answers
Are insiders buying MBI stock?
No open-market insider purchases or sales of MBI were filed in the last 90 days.
Which hedge funds own MBI?
7 13F filers hold MBI among their 50 largest positions, worth $58.0M combined, including Kahn Brothers Group and Francis Chou. The biggest bets by portfolio weight are Kahn Brothers Group (4.3%), Valueworks LLC (2.7%) and Wolf Hill Capital Management, LP (1.3%). In their latest 13Fs, 1 manager opened a new position and 2 added to one.
Has Congress traded MBI?
No member of Congress has disclosed a trade in MBI.
Who is the largest holder of MBI?
Among 13F filers, Kahn Brothers Group reports the largest MBI position, $27.5M (4,213,920 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Kahn Brothers Group's: 4.3% of its portfolio.
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