BeStock  

NB Bancorp NBBK

US equityMarket cap rank #3264Banks - Regional
$22.27 −$0.19 (-0.85%)
Pre-market · Oct 8, 8:10 am ET · After hours $22.27 0.00%
Open$22.13
Prev close$22.46
Day range$22.08 – $22.41
Volume160.6K
Market cap$975.84M
P/E (TTM)14.7
Dividend yield1.26%

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership64.1%+0.13 pts vs. prior quarter
Institutions holding201+0 vs. prior quarter
Insider trades (recent)39 buys / 8 sellsNet buying
Short interest3.84% of floatDays to cover 6.5 · as of 15 Sep 2026
Short-sale volume share28.4%5-day average of daily volume

Short-sale volume as % of daily volume

19%25%30%36%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: +$547.9K (7 inflow days, 13 outflow days).

Net flow by order size, last 20 sessions

+$582.7KSuper−$34.8KBig+$474.2KMid+$186.6KSmall

Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.

The five largest holders on file together own 28.7% of shares outstanding.

Largest holders

  • BlackRock8.16%
  • Needham Bank Employee Stock Ownership Plan8.16%
  • Vanguard Capital Management, LLC4.71%
  • AltraVue Capital, LLC4.05%
  • Pertento Partners LLP3.61%
  • State Street Global Advisors3.60%
  • Geode Capital Management, LLC2.82%
  • Dimensional Fund Advisors1.85%

By investor type

  • Mutual Fund40.34%
  • Hedge Fund11.25%
  • Corporate Pension Plan8.16%
  • Individual/Insider5.89%
  • Public Company2.35%
  • Government Pension Fund1.10%
  • Private Company0.60%
  • Insurance Company0.13%

Reported short interest has fallen from 3.93% to 3.84% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Recent institutional activity

HolderTypePeriodShare changeNew stake
Nuveen Asset Management LLC Insurance Company 2026/Q3 +53,736 0.1%
AltraVue Capital, LLC Hedge Fund 2026/Q3 +351,028 4.1%
BlackRock Mutual Fund 2026/Q3 +247,322 8.2%
Dimensional Fund Advisors Mutual Fund 2026/Q3 +230,936 1.8%
State Street Global Advisors Mutual Fund 2026/Q3 +178,228 3.6%
Citadel Advisors LLC Hedge Fund 2026/Q3 +173,443 0.7%
Marshall Wace LLP Hedge Fund 2026/Q3 +123,112 0.3%
Legato Capital Management, LLC Mutual Fund 2026/Q3 +90,020 0.9%
New York State Common Retirement Fund Government Pension Fund 2026/Q3 +85,570 0.8%
D. E. Shaw & Co., L.P. Hedge Fund 2026/Q3 +79,546 0.4%
CA Indosuez (Switzerland) SA Private Company 2026/Q3 +70,000 0.2%
UBS Asset Management Mutual Fund 2026/Q3 +63,282 0.4%
FMR Mutual Fund 2026/Q3 +59,941 1.2%
Y-Intercept (Hong Kong) Limited Mutual Fund 2026/Q3 +54,541 0.1%
Geode Capital Management, LLC Mutual Fund 2026/Q3 +54,287 2.8%

Institutional buy/sell activity by reporting period, largest moves first.

Insider transactions

DateInsiderTitleTransactionSharesPriceHeld after
19 Aug 2026 Joseph Campanelli Chairperson & CEO Open Market Acquisition +2,000 $21.75 484,687
19 Aug 2026 Jean-Pierre Lapointe Chief Financial Officer Open Market Acquisition +200 $21.80 116,649
13 Aug 2026 Kevin Henkin Chief Credit Officer Open Market Disposition -2,000 $22.93 15,180
14 May 2026 Joseph Campanelli Chairperson & CEO Open Market Acquisition +3,000 $19.21 481,937
23 Apr 2026 Joseph Campanelli Chairperson & CEO Sale to Issuer -24,371 $19.82 478,937
23 Apr 2026 Joseph Campanelli Chairperson & CEO Open Market Acquisition +2,500 $19.63 478,937
23 Apr 2026 Hope Pascucci Independent Director Open Market Acquisition +20,000 $19.49 222,402
23 Apr 2026 Christine Roberts Chief Operating Officer Sale to Issuer -3,589 $19.82 71,081
18 Mar 2026 Joseph Campanelli Chairperson & CEO Open Market Acquisition +2,500 $20.16 499,935
8 Mar 2026 Jean-Pierre Lapointe Chief Financial Officer Open Market Acquisition +1,000 $20.42 116,128
8 Mar 2026 Matthew Schulman Other Acquisition +6,980 – 6,980
5 Mar 2026 Joseph Campanelli Chairperson & CEO Open Market Acquisition +5,000 $20.78 497,435
1 Mar 2026 Matthew Schulman Initial Statement of Beneficial +0 – –
24 Feb 2026 Paul Evangelista Executive VP & Director of Specialized Banking Center Other Acquisition +6,874 – 51,771
24 Feb 2026 Joseph Campanelli Chairperson & CEO Other Acquisition +63,015 – 492,435
24 Feb 2026 Stephanie Maiona Executive VP & Senior Commercial Lender Other Acquisition +6,874 – 50,726
24 Feb 2026 Kevin Henkin Chief Credit Officer Other Acquisition +6,874 – 17,180
24 Feb 2026 Christine Roberts Chief Operating Officer Other Acquisition +13,749 – 74,670
24 Feb 2026 Jean-Pierre Lapointe Chief Financial Officer Other Acquisition +13,749 – 115,128
24 Feb 2026 James White Executive Vice President Other Acquisition +6,874 – 60,473

From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 1,684,193 3.8% 6.5
31 Aug 2026 1,449,345 3.3% 4.5
14 Aug 2026 1,599,676 3.7% 5.0
31 Jul 2026 1,668,898 3.8% 4.1
15 Jul 2026 1,833,785 4.2% 9.5
30 Jun 2026 1,723,780 3.9% 5.0

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