NB Bancorp
NBBK
161 hedge funds and large institutions have $475M invested in NB Bancorp in 2026 Q2 according to their latest regulatory filings, with 13 funds opening new positions, 68 increasing their positions, 49 reducing their positions, and 26 closing their positions.
207% more call options, than puts
Call options by funds: $2.71M | Put options by funds: $885K
39% more repeat investments, than reductions
Existing positions increased: 68 | Existing positions reduced: 49
0.36% less ownership
Funds ownership: 50.62% → 50.27% (-0.36%)
2% less capital invested
Capital invested by funds: $486M → $475M (-$11.4M)
9% less funds holding
Funds holding: 177 → 161 (-16)
50% less first-time investments, than exits
New positions opened: 13 | Existing positions closed: 26
100% less funds holding in top 10
Funds holding in top 10: 2 → 0 (-2)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AC
AltraVue Capital
Bellevue,
Washington
|
+$7.22M |
| 2 |
BlackRock
New York
|
+$5.09M |
| 3 |
Dimensional Fund Advisors
Austin,
Texas
|
+$4.75M |
| 4 |
State Street
Boston,
Massachusetts
|
+$3.67M |
| 5 |
Citadel Advisors
Miami,
Florida
|
+$3.57M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
PP
Pertento Partners
London,
United Kingdom
|
-$15M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$15M |
| 3 |
SEI Investments
Oaks,
Pennsylvania
|
-$3.29M |
| 4 |
Renaissance Technologies
New York
|
-$2.73M |
| 5 |
Goldman Sachs
New York
|
-$2.46M |
NBBK Hedge Fund Activity: Q2 2026 in Review
161 of the 8,349 institutional investors tracked by Wall St. Rank reported a position in NB Bancorp (NBBK) for Q2 2026, worth a combined $475M — down 2.3% from $486M a quarter earlier.
Sellers outnumbered buyers: 26 funds closed out of NBBK and 13 opened new positions — a net loss of 13 holders — while 49 trimmed existing stakes and 68 added.
The largest buyer was AltraVue Capital, adding an estimated $7.22M. The largest seller was Pertento Partners, cutting an estimated $15M.
- 161 institutional investors held NB Bancorp (NBBK) as of Q2 2026, down from 177 in Q1 2026.
- Funds reported $475M of NB Bancorp stock for Q2 2026, down 2.3% quarter-over-quarter.
- 13 funds opened new NB Bancorp positions in Q2 2026 and 26 closed out, a net change of -13 holders.
- The largest NB Bancorp buyer in Q2 2026 was AltraVue Capital, an estimated $7.22M added.
- The largest NB Bancorp seller in Q2 2026 was Pertento Partners, an estimated $15M sold.
Based on aggregated 13F filings for Q2 2026.