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NB Bancorp
NBBK

130 hedge funds and large institutions have $334M invested in NB Bancorp in 2025 Q2 according to their latest regulatory filings, with 21 funds opening new positions, 44 increasing their positions, 45 reducing their positions, and 11 closing their positions.

New
Increased
Maintained
Reduced
Closed

91% more first-time investments, than exits

New positions opened: 21 | Existing positions closed: 11

7% more funds holding

Funds holding: 121 → 130 (+9)

2.29% more ownership

Funds ownership: 43.85% → 46.14% (+2.3%)

1% more capital invested

Capital invested by funds: $331M → $334M (+$3.05M)

2% less repeat investments, than reductions

Existing positions increased: 44 | Existing positions reduced: 45

100% less funds holding in top 10

Funds holding in top 10: 1 → 0 (-1)

Holders
130
Holders Change
+9
Holders Change %
+7.44%
% of All Funds
1.71%
Holding in Top 10
–
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-100%
% of All Funds
–
New
21
Increased
44
Reduced
45
Closed
11
Calls
$870K
Puts
–
Net Calls
+$870K
Net Calls Change
-$1.47M

Top Buyers

Rank Fund Capital Flow
1
Millennium Management
Millennium Management
New York
+$6.58M
2
Wellington Management Group
Wellington Management Group
Massachusetts
+$4.22M
3
Marshall Wace
Marshall Wace
United Kingdom
+$3.32M
4
PP
Pertento Partners
United Kingdom
+$2.29M
5
Financial Engines Advisors
Financial Engines Advisors
California
+$2M

Top Sellers

Rank Fund Capital Flow
1
BlackRock
BlackRock
New York
-$4.38M
2
ECA
Endeavour Capital Advisors
Connecticut
-$2.97M
3
Bank of America
Bank of America
North Carolina
-$2.93M
4
Vanguard Group
Vanguard Group
Pennsylvania
-$2.14M
5
GOCP
Great Oak Capital Partners
Massachusetts
-$2.09M
Name Holding Trade Value Shares
Change 		Change in
Stake
UBS Group
26
UBS Group
Switzerland
$1.85M +$776K +45,948 +79%
MP
27
Mangrove Partners
Connecticut
$1.85M – – –
Bank of New York Mellon
28
Bank of New York Mellon
New York
$1.85M +$32.2K +1,909 +2%
Qube Research & Technologies (QRT)
29
Qube Research & Technologies (QRT)
United Kingdom
$1.8M +$356K +21,072 +26%
JP Morgan Chase
30
JP Morgan Chase
New York
$1.79M -$1.9M -112,339 -53%
UBS AM
31
UBS AM
Illinois
$1.67M +$511K +30,247 +48%
Two Sigma Advisers
32
Two Sigma Advisers
New York
$1.6M +$233K +13,800 +18%
Ameriprise
33
Ameriprise
Minnesota
$1.59M +$162K +9,600 +12%
IAIM
34
International Assets Investment Management
Florida
$1.55M +$545K +32,300 +59%
Focus Partners Wealth
35
Focus Partners Wealth
Massachusetts
$1.52M +$557 +33 +0%
OC
36
Oppenheimer & Close
New York
$1.48M – – –
Barclays
37
Barclays
United Kingdom
$1.46M +$381K +22,570 +38%
SV
38
Stilwell Value
New York
$1.43M – – –
Swiss National Bank
39
Swiss National Bank
Switzerland
$1.36M -$45.6K -2,700 -3%
CSS
40
Cubist Systematic Strategies
Connecticut
$1.32M +$1.25M +73,914 New
GOCP
41
Great Oak Capital Partners
Massachusetts
$1.17M -$2.09M -124,032 -67%
Susquehanna International Group
42
Susquehanna International Group
Pennsylvania
$1.12M -$153K -9,044 -13%
Legal & General Group
43
Legal & General Group
United Kingdom
$1.11M +$37.8K +2,237 +4%
American Century Companies
44
American Century Companies
Missouri
$1.11M +$612K +36,238 +141%
RhumbLine Advisers
45
RhumbLine Advisers
Massachusetts
$1.08M +$164K +9,714 +19%
LA
46
Lynch & Associates
Indiana
$1.02M -$57K -3,375 -6%
FC
47
Farley Capital
New York
$975K – – –
XT
48
XTX Topco
Cayman Islands
$940K +$889K +52,620 New
TI
49
Trexquant Investment
Connecticut
$925K +$874K +51,781 New
SIM
50
SummerHaven Investment Management
Connecticut
$908K +$14.3K +849 +2%
1
2
3 4 5

NBBK Hedge Fund Activity: Q2 2025 in Review

130 of the 7,595 institutional investors tracked by Wall St. Rank reported a position in NB Bancorp (NBBK) for Q2 2025, worth a combined $334M — up 0.92% from $331M a quarter earlier.

Buyers outnumbered sellers: 21 funds opened new NBBK positions and 11 closed out — a net gain of 10 holders — while 44 added to existing stakes and 45 trimmed.

The largest buyer was Millennium Management, adding an estimated $6.58M. The largest seller was BlackRock, cutting an estimated $4.38M.

  • 130 institutional investors held NB Bancorp (NBBK) as of Q2 2025, up from 121 in Q1 2025.
  • Funds reported $334M of NB Bancorp stock for Q2 2025, up 0.92% quarter-over-quarter.
  • 21 funds opened new NB Bancorp positions in Q2 2025 and 11 closed out, a net change of +10 holders.
  • The largest NB Bancorp buyer in Q2 2025 was Millennium Management, an estimated $6.58M added.
  • The largest NB Bancorp seller in Q2 2025 was BlackRock, an estimated $4.38M sold.

Based on aggregated 13F filings for Q2 2025.