Mbia Inc: which funds bought and sold

Institutions that bought and sold Mbia shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 68 institutions that filed 13F reports for both quarters added to or opened positions in Mbia, and 53 cut or closed them. Together they added a net 1.8M shares, +7.1% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 809K shares (−11.0%); index fund managers were net buyers of 467K shares (+5.2%). 17 opened a new position and 20 sold out entirely.

Bought, Q2 2026 68 institutions, 17 of them new holders Sold, Q2 2026 53 institutions, 20 of them sold out

Net change, all compared +1.8M shares (+7.1%)

Net change, active managers −809K shares (−11.0%), 10 bought, 17 sold

Buyers versus sellers

institutions compared, 149

68 bought 28 53 sold

Active managers and hedge funds 10 bought · 17 sold · −809K

Index fund managers 8 bought · 1 sold · +467K

Other institutions 50 bought · 35 sold · +2.2M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Kahn Brothers Group Inc	+2.2M +104.9%	4.2M	$27.5M
Cerity Partners LLC	+655K +151.6%	1.1M	$7.1M
Blackrock, Inc. Index funds	+280K +8.3%	3.7M	$23.9M
AQR Capital Management LLC Hedge fund	+115K +448.0%	141K	$919,209
Group One Trading LLC	+57K +78.9%	129K	$841,367
Geode Capital Management, LLC Index funds	+56K +5.1%	1.1M	$7.4M
Vanguard Portfolio Management LLC Index funds	+47K +17.8%	311K	$2M
Empirical Asset Management, LLC	+42K New position	42K	$275,796
Trexquant Investment LP Hedge fund	+41K +165.0%	66K	$433,306
Northern Trust Corp Index funds	+40K +9.8%	444K	$2.9M
Valueworks LLC	+35K +1.8%	2.0M	$12.8M
Quantinno Capital Management LP	+33K +34.9%	128K	$833,543
Empowered Funds, LLC	+32K New position	32K	$210,172
Russell Investments Group, Ltd.	+29K +6.8%	459K	$3M
Price T Rowe Associates Inc Active manager	+28K +23.3%	147K	$956,000
TCW Group Inc Active manager	+27K +2.6%	1.1M	$6.9M
State Street Corp Index funds	+24K +2.3%	1.1M	$7.1M
Marshall Wace, LLP Hedge fund	+24K New position	24K	$157,080
Hightower Advisors, LLC	+23K +50.0%	69K	$452,468
State Of Wisconsin Investment Board	+22K +24.6%	113K	$736,845

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
AQR Capital Management LLC Hedge fund	+115K +448.0%	141K	$919,209
Trexquant Investment LP Hedge fund	+41K +165.0%	66K	$433,306
Price T Rowe Associates Inc Active manager	+28K +23.3%	147K	$956,000
TCW Group Inc Active manager	+27K +2.6%	1.1M	$6.9M
Marshall Wace, LLP Hedge fund	+24K New position	24K	$157,080
Two Sigma Investments, LP Hedge fund	+15K +87.7%	32K	$206,528
Exoduspoint Capital Management, LP Hedge fund	+13K +37.9%	46K	$299,985
Bridgeway Capital Management, LLC Active manager	+7,200 +9.7%	82K	$532,684
Alliancebernstein L.P. Active manager	+3,200 +4.3%	77K	$457,670
FMR LLC Active manager	+762 +7.2%	11K	$73,992

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Wolf Hill Capital Management, LP Hedge fund	−428K −16.8%	2.1M	$13.8M
UBS Group AG	−266K −40.0%	400K	$2.6M
Susquehanna International Group, LLP	−225K Sold out	0	—
Jane Street Group, LLC	−213K −68.7%	97K	$632,010
Citadel Advisors LLC Hedge fund	−135K −76.7%	41K	$267,020
Xtx Topco Ltd	−120K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−99K −24.2%	311K	$2M
Bank Of America Corp	−94K −55.0%	77K	$499,993
Walleye Capital LLC Hedge fund	−92K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−76K −42.7%	102K	$664,114
Tudor Investment Corp Et Al Hedge fund	−51K −14.5%	298K	$1.9M
Hosking Partners LLP Active manager	−36K −2.2%	1.5M	$10.1M
Frec Markets, Inc.	−35K Sold out	0	—
Goldman Sachs Group Inc	−35K −10.7%	289K	$1.9M
D. E. Shaw & Co., Inc. Hedge fund	−31K −73.8%	11K	$72,789
Quadrature Capital Ltd Hedge fund	−31K Sold out	0	—
Mirabella Financial Services LLP	−26K Sold out	0	—
Centiva Capital, LP Hedge fund	−24K Sold out	0	—
Point72 Asset Management, L.P. Hedge fund	−22K Sold out	0	—
State Of Wyoming	−21K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Wolf Hill Capital Management, LP Hedge fund	−428K −16.8%	2.1M	$13.8M
Citadel Advisors LLC Hedge fund	−135K −76.7%	41K	$267,020
Renaissance Technologies LLC Hedge fund	−99K −24.2%	311K	$2M
Walleye Capital LLC Hedge fund	−92K Sold out	0	—
Squarepoint Ops LLC Hedge fund	−76K −42.7%	102K	$664,114
Tudor Investment Corp Et Al Hedge fund	−51K −14.5%	298K	$1.9M
Hosking Partners LLP Active manager	−36K −2.2%	1.5M	$10.1M
D. E. Shaw & Co., Inc. Hedge fund	−31K −73.8%	11K	$72,789
Quadrature Capital Ltd Hedge fund	−31K Sold out	0	—
Centiva Capital, LP Hedge fund	−24K Sold out	0	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Empirical Asset Management, LLC	42K	$275,796
Empowered Funds, LLC	32K	$210,172
Marshall Wace, LLPHedge fund	24K	$157,080
46 Peaks LLC	19K	$126,475
Sequoia Financial Advisors, LLC	14K	$92,193
Voya Investment Management LLC	11K	$74,419
Dynamic Technology Lab Private Ltd	11K	$72,000
Savant Capital, LLC	11K	$69,979
Arax Advisory Partners	9,079	$59,195
Walleye Trading LLC	2,479	$16,163

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Susquehanna International Group, LLP	225K	$1.3M
Xtx Topco Ltd	120K	$707,841
Walleye Capital LLCHedge fund	92K	$542,544
Frec Markets, Inc.	35K	$205,207
Quadrature Capital LtdHedge fund	31K	$182,418
Mirabella Financial Services LLP	26K	$156,243
Centiva Capital, LPHedge fund	24K	$140,416
Point72 Asset Management, L.P.Hedge fund	22K	$127,290
State Of Wyoming	21K	$126,279
HRT Financial LP	14K	$81,000

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 129
Ten largest holders: 71.9%
Index fund managers: 33.9%
Active managers and hedge funds: 23.6%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	10	17	1	6	−809K	−11.0%
Index fund managers	8	1	0	0	+467K	+5.2%
Other institutions	50	35	16	14	+2.2M	+22.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Mbia.

Only managers that filed a holdings report for both quarters are compared (149 here). 1 other holder is left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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