Nb Bancorp Inc
$22.46+0.4%
+$36.1M
Net Activity
+2.06% total shares
Institutions Holding
162
Popularity Rank
#3507
Avg Weight
0.08%
Total Value
$523.5M
Market Cap
$845.1M
162 institutions currently hold NBBK, with 86 net buyers and 72 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
72
Net Buying Institutions
86
Top 5 by Value
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Across its top 20 institutional holders, NBBK's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 7/100, avg. turnover score 36/100).
NBBK ranks #3507 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
162 institutions disclose a position in NBBK, but none treat it as a major bet — even Tieton Capital Management, LLC, its most concentrated holder, allocates just 3.3% of its own portfolio to it.
California State Teachers Retirement System has added to its NBBK position for two straight quarters, increasing it by $38.3M to reach $39.0M today.
EJF Capital LP has trimmed its NBBK position for two straight quarters, cutting it by $2.6M while still holding $861.1K.
NBBK is up 0.4% today, and institutions have been net buyers of $36.1M this quarter — today's price move and the underlying institutional flow are pointing the same direction.
NBBK closed its latest fiscal year with net income of $50.3M, and currently trades at a P/E of 16.8.
+$100.9M
Total Buy Value
$60.8M
Total Sell Value
86
Net Buyers
72
Net Sellers
NBBK
Q2 2026
Top 5 Institutional Movers
-$15.3M
-$15.0M
+$7.5M
NBBK does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
No Form 144 planned sale filings in the last 90 days
No Schedule 13D/13G filings for this ticker
1
Filings (14d)
NB Bancorp, Inc., the holding company for Needham Bank, issued a press release on July 22, 2026, announcing its financial results for the quarter ending June 30, 2026. The release is included as Exhibit 99.1 to this 8-K filing. The filing excerpt does not include specific financial numbers.
View Full Filing (SEC EDGAR)63945M107
The most-added stocks by 13F institutions this quarter
Institutions Holding
6,242
Total reported value
$2.2T
3229 13F institutions increased their position this quarter
Institutions Holding
5,990
Total reported value
$3.6T
3033 13F institutions increased their position this quarter
Institutions Holding
6,153
Total reported value
$1.8T
2971 13F institutions increased their position this quarter
The most widely held stocks tracked across all 13F institutions
Institutions Holding
4,323
Total reported value
$864.3B
Held by 4323 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,246
Total reported value
$320.5B
Held by 4246 institutions — one of the most-tracked stocks on AlphaSMO
Institutions Holding
4,231
Total reported value
$346.4B
Held by 4231 institutions — one of the most-tracked stocks on AlphaSMO
Access NBBK's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/NBBKCLI
npx alphasmo stocks get NBBK