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NB Bancorp
NBBK

145 hedge funds and large institutions have $339M invested in NB Bancorp in 2025 Q3 according to their latest regulatory filings, with 28 funds opening new positions, 44 increasing their positions, 45 reducing their positions, and 13 closing their positions.

New
Increased
Maintained
Reduced
Closed

30,057% more call options, than puts

Call options by funds: $2.11M | Put options by funds: $7K

115% more first-time investments, than exits

New positions opened: 28 | Existing positions closed: 13

12% more funds holding

Funds holding: 130 → 145 (+15)

2.05% more ownership

Funds ownership: 46.14% → 48.19% (+2.1%)

1% more capital invested

Capital invested by funds: $334M → $339M (+$4.44M)

2% less repeat investments, than reductions

Existing positions increased: 44 | Existing positions reduced: 45

Holders
145
Holders Change
+15
Holders Change %
+11.54%
% of All Funds
1.9%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
28
Increased
44
Reduced
45
Closed
13
Calls
$2.11M
Puts
$7K
Net Calls
+$2.1M
Net Calls Change
+$1.23M

Top Buyers

Rank Fund Capital Flow
1
UBS Group
UBS Group
Switzerland
+$5.04M
2
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management
California
+$2.72M
3
BCM
Bridgeway Capital Management
Texas
+$2.11M
4
First Trust Advisors
First Trust Advisors
Illinois
+$1.82M
5
EF
Empowered Funds
Pennsylvania
+$1.46M

Top Sellers

Rank Fund Capital Flow
1
Deutsche Bank
Deutsche Bank
Germany
-$2.9M
2
Millennium Management
Millennium Management
New York
-$1.83M
3
Bank of America
Bank of America
North Carolina
-$1.18M
4
Victory Capital Management
Victory Capital Management
Texas
-$1.11M
5
BlackRock
BlackRock
New York
-$1.09M
Name Holding Trade Value Shares
Change 		Change in
Stake
BCM
26
Bridgeway Capital Management
Texas
$2.03M +$2.11M +114,812 New
MP
27
Mangrove Partners
Connecticut
$2.01M +$190K +10,374 +10%
Renaissance Technologies
28
Renaissance Technologies
New York
$1.96M -$610K -33,248 -23%
N
29
Nuveen
North Carolina
$1.92M – – –
Bank of New York Mellon
30
Bank of New York Mellon
New York
$1.74M -$86.3K -4,706 -5%
IAIM
31
International Assets Investment Management
Florida
$1.59M – – –
Qube Research & Technologies (QRT)
32
Qube Research & Technologies (QRT)
United Kingdom
$1.53M -$253K -13,797 -14%
CSS
33
Cubist Systematic Strategies
Connecticut
$1.51M +$213K +11,608 +16%
Focus Partners Wealth
34
Focus Partners Wealth
Massachusetts
$1.51M +$1.08K +59 +0.1%
OC
35
Oppenheimer & Close
New York
$1.46M – – –
AQR Capital Management
36
AQR Capital Management
Connecticut
$1.44M +$629K +34,273 +72%
SV
37
Stilwell Value
New York
$1.41M – – –
EF
38
Empowered Funds
Pennsylvania
$1.41M +$1.46M +79,812 New
Ameriprise
39
Ameriprise
Minnesota
$1.38M -$193K -10,500 -12%
TI
40
Trexquant Investment
Connecticut
$1.3M +$403K +21,943 +42%
Bank of America
41
Bank of America
North Carolina
$1.15M -$1.18M -64,532 -50%
Swiss National Bank
42
Swiss National Bank
Switzerland
$1.12M -$227K -12,400 -16%
Legal & General Group
43
Legal & General Group
United Kingdom
$1.09M – – –
Citadel Advisors
44
Citadel Advisors
Florida
$1.05M +$742K +40,432 +214%
LA
45
Lynch & Associates
Indiana
$994K -$9.48K -517 -0.9%
Jane Street
46
Jane Street
New York
$956K +$505K +27,507 +103%
RhumbLine Advisers
47
RhumbLine Advisers
Massachusetts
$939K -$135K -7,342 -12%
Barclays
48
Barclays
United Kingdom
$933K -$532K -29,024 -35%
Invesco
49
Invesco
Georgia
$933K +$186K +10,132 +24%
Rafferty Asset Management
50
Rafferty Asset Management
New York
$930K +$313K +17,039 +48%
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NBBK Hedge Fund Activity: Q3 2025 in Review

145 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in NB Bancorp (NBBK) for Q3 2025, worth a combined $339M — up 1.3% from $334M a quarter earlier.

Buyers outnumbered sellers: 28 funds opened new NBBK positions and 13 closed out — a net gain of 15 holders — while 44 added to existing stakes and 45 trimmed.

The largest buyer was UBS Group, adding an estimated $5.04M. The largest seller was Deutsche Bank, cutting an estimated $2.9M.

  • 145 institutional investors held NB Bancorp (NBBK) as of Q3 2025, up from 130 in Q2 2025.
  • Funds reported $339M of NB Bancorp stock for Q3 2025, up 1.3% quarter-over-quarter.
  • 28 funds opened new NB Bancorp positions in Q3 2025 and 13 closed out, a net change of +15 holders.
  • The largest NB Bancorp buyer in Q3 2025 was UBS Group, an estimated $5.04M added.
  • The largest NB Bancorp seller in Q3 2025 was Deutsche Bank, an estimated $2.9M sold.

Based on aggregated 13F filings for Q3 2025.