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MBIA
MBI

121 hedge funds and large institutions have $183M invested in MBIA in 2025 Q3 according to their latest regulatory filings, with 23 funds opening new positions, 34 increasing their positions, 38 reducing their positions, and 13 closing their positions.

New
Increased
Maintained
Reduced
Closed

461% more call options, than puts

Call options by funds: $15.1M | Put options by funds: $2.69M

80% more capital invested

Capital invested by funds: $102M → $183M (+$81.5M)

77% more first-time investments, than exits

New positions opened: 23 | Existing positions closed: 13

9% more funds holding

Funds holding: 111 → 121 (+10)

2.22% more ownership

Funds ownership: 46.5% → 48.72% (+2.2%)

11% less repeat investments, than reductions

Existing positions increased: 34 | Existing positions reduced: 38

Holders
121
Holders Change
+10
Holders Change %
+9.01%
% of All Funds
1.59%
Holding in Top 10
1
Holding in Top 10 Change
+1
Holding in Top 10 Change %
% of All Funds
0.01%
New
23
Increased
34
Reduced
38
Closed
13
Calls
$15.1M
Puts
$2.69M
Net Calls
+$12.4M
Net Calls Change
+$12.3M

Top Buyers

Rank Fund Capital Flow
1
KBG
Kahn Brothers Group
New York
+$6.53M
2
UBS Group
UBS Group
Switzerland
+$2.74M
3
Jane Street
Jane Street
New York
+$1.42M
4
PFMOSF
Philadelphia Financial Management of San Francisco
California
+$1.34M
5
Simplex Trading
Simplex Trading
Illinois
+$1.32M

Top Sellers

Rank Fund Capital Flow
1
Marshall Wace
Marshall Wace
United Kingdom
-$1.81M
2
FCH
Freestone Capital Holdings
Washington
-$1.32M
3
V
ValueWorks
New York
-$1M
4
Morgan Stanley
Morgan Stanley
New York
-$893K
5
Two Sigma Investments
Two Sigma Investments
New York
-$487K
Name Holding Trade Value Shares
Change 		Change in
Stake
Wells Fargo
26
Wells Fargo
California
$1.2M +$105K +16,581 +12%
AFA
27
Alta Fundamental Advisers
New York
$1.11M +$943K +148,662 New
Two Sigma Investments
28
Two Sigma Investments
New York
$1.09M -$487K -76,798 -34%
Bank of New York Mellon
29
Bank of New York Mellon
New York
$1.05M +$42.3K +6,673 +5%
GCP
30
GSA Capital Partners
United Kingdom
$996K -$129K -20,420 -13%
JP Morgan Chase
31
JP Morgan Chase
New York
$945K +$116K +18,233 +17%
N
32
Nuveen
North Carolina
$899K – – –
Cerity Partners
33
Cerity Partners
New York
$775K +$660K +104,045 New
T. Rowe Price Associates
34
T. Rowe Price Associates
Maryland
$773K +$14.3K +2,256 +2%
NS
35
NBC Securities
Alabama
$732K – – –
State of Wisconsin Investment Board
36
State of Wisconsin Investment Board
Wisconsin
$636K -$214K -33,698 -28%
AllianceBernstein
37
AllianceBernstein
Tennessee
$585K +$12K +1,900 +2%
Two Sigma Advisers
38
Two Sigma Advisers
New York
$564K -$148K -23,300 -24%
Russell Investments Group
39
Russell Investments Group
United Kingdom
$525K -$48.4K -7,640 -10%
BCM
40
Bluefin Capital Management
New York
$507K -$288K -45,490 -40%
RhumbLine Advisers
41
RhumbLine Advisers
Massachusetts
$504K -$13.9K -2,186 -3%
Royal Bank of Canada
42
Royal Bank of Canada
Ontario, Canada
$497K +$52.9K +8,347 +14%
Barclays
43
Barclays
United Kingdom
$479K -$77.3K -12,188 -16%
Renaissance Technologies
44
Renaissance Technologies
New York
$447K -$467K -73,600 -55%
BCM
45
Bridgeway Capital Management
Texas
$447K -$127K -20,000 -25%
PEAK6
46
PEAK6
Illinois
$430K +$165K +25,970 +82%
D.E. Shaw & Co
47
D.E. Shaw & Co
New York
$404K -$27.2K -4,291 -7%
QCM
48
Quantinno Capital Management
New York
$401K +$153K +24,155 +81%
Invesco
49
Invesco
Georgia
$387K +$66.6K +10,503 +25%
Franklin Resources
50
Franklin Resources
California
$385K +$327K +51,635 New
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MBI Hedge Fund Activity: Q3 2025 in Review

121 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in MBIA (MBI) for Q3 2025, worth a combined $183M — up 80% from $102M a quarter earlier.

Buyers outnumbered sellers: 23 funds opened new MBI positions and 13 closed out — a net gain of 10 holders — while 34 added to existing stakes and 38 trimmed.

The largest buyer was Kahn Brothers Group, opening a new position worth an estimated $6.53M. The largest seller was Marshall Wace, exiting entirely with an estimated $1.81M sold.

  • 121 institutional investors held MBIA (MBI) as of Q3 2025, up from 111 in Q2 2025.
  • Funds reported $183M of MBIA stock for Q3 2025, up 80% quarter-over-quarter.
  • 23 funds opened new MBIA positions in Q3 2025 and 13 closed out, a net change of +10 holders.
  • The largest MBIA buyer in Q3 2025 was Kahn Brothers Group, an estimated $6.53M added.
  • The largest MBIA seller in Q3 2025 was Marshall Wace, an estimated $1.81M sold.

Based on aggregated 13F filings for Q3 2025.