DOSSIER · 13F Holders · Q2 2026
NBBK

NB BANCORP INC

172 institutions still hold NB BANCORP INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 63945M107·172 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$353M
visible holders
Holders
172
filers reporting
Concentration
19.94%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

172 institutions reported NBBK in Q2 2026. BlackRock, Inc. leads at 19.9% of the visible book.

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$70M3.3M0.00%Q2 2026
02
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$35M1.7M0.00%Q2 2026
03
AltraVue Capital, LLC
CIK 0001740837
$35M1.7M2.52%Q2 2026
04
Pertento Partners LLP
CIK 0001894571
$31M1.5M1.68%Q2 2026
05
STATE STREET CORP
CIK 0000093751
$31M1.5M0.00%Q2 2026
06
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$24M1.2M0.00%Q2 2026
07
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$16M753K0.00%Q2 2026
08
GOLDMAN SACHS GROUP INC
CIK 0000886982
$12M572K0.00%Q2 2026
09
Nuveen, LLC
CIK 0001871926
$11M499K0.00%Q2 2026
10
FMR LLC
CIK 0000315066
$11M497K0.00%Q2 2026
11
Tieton Capital Management, LLC
CIK 0001381954
$10M525K3.56%Q4 2025
12
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC
CIK 0001164833
$9M451K0.03%Q1 2026
13
Vanguard Portfolio Management
CIK 0002100121· Index
$8M397K0.00%Q2 2026
14
Legato Capital Management LLC
CIK 0001442641
$8M366K0.64%Q2 2026
15
NORTHERN TRUST CORP
CIK 0000073124· Index
$8M360K0.00%Q2 2026
16
CITADEL ADVISORS LLC
CIK 0001423053
$8M355K0.00%Q2 2026
17
NEW YORK STATE COMMON RETIREMENT FUND
CIK 0000810265
$7M346K0.01%Q2 2026
18
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$7M319K0.00%Q2 2026
19
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$6M277K0.00%Q2 2026
20
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$6M262K0.00%Q2 2026
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Insiders at NB BANCORP INC
Campanelli Joseph PLapointe Jean-PierreRoberts ChristineLynch Christopher R.Montgomery Kenneth C.Nolan Joseph R JrWhalen MarkJackson Angela