DOSSIER · 13F Holders · Q1 2026
NBBK

NB BANCORP INC

184 institutions still hold NB BANCORP INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 63945M107·184 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$353M
visible holders
Holders
184
filers reporting
Concentration
18.41%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

184 institutions reported NBBK in Q1 2026. BlackRock, Inc. leads at 18.4% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$65M3.1M0.00%Q1 2026
02
Pertento Partners LLP
CIK 0001894571
$46M2.2M3.40%Q1 2026
03
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$36M1.7M0.00%Q1 2026
04
AltraVue Capital, LLC
CIK 0001740837
$27M1.3M2.37%Q1 2026
05
STATE STREET CORP
CIK 0000093751
$27M1.3M0.00%Q1 2026
06
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$23M1.1M0.00%Q1 2026
07
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$15M710K0.00%Q1 2026
08
GOLDMAN SACHS GROUP INC
CIK 0000886982
$15M692K0.00%Q1 2026
09
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$11M522K0.00%Q1 2026
10
Tieton Capital Management, LLC
CIK 0001381954
$10M525K3.56%Q4 2025
11
Nuveen, LLC
CIK 0001871926
$10M488K0.00%Q1 2026
12
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC
CIK 0001164833
$9M451K0.03%Q1 2026
13
FMR LLC
CIK 0000315066
$9M438K0.00%Q1 2026
14
Vanguard Portfolio Management
CIK 0002100121· Index
$8M386K0.00%Q1 2026
15
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$8M372K0.01%Q1 2026
16
NORTHERN TRUST CORP
CIK 0000073124· Index
$7M335K0.00%Q1 2026
17
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$7M318K0.00%Q1 2026
18
SEI INVESTMENTS CO
CIK 0000350894
$6M302K0.01%Q1 2026
19
MORGAN STANLEY
CIK 0000895421
$6M280K0.00%Q1 2026
20
Legato Capital Management LLC
CIK 0001442641
$6M276K0.53%Q1 2026
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164 more holders available. Log in →
Insiders at NB BANCORP INC
Roberts ChristineLynch Christopher R.Montgomery Kenneth C.Nolan Joseph R JrWhalen MarkJackson AngelaDarcey WilliamCampanelli Joseph P