NBBK Institutional Ownership
Who owns NB Bancorp, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 161 funds reported holding NBBK at Jun 30, 2026, together owning 51.5% of the company.
- ●79 buying vs 73 selling
- ▼Held by funds -1.2 pts
- ▼Funds holding -16
- ▼Superinvestors: 1 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 161 | 177 | −9.0% |
| In funds' top 10 | 0 | 2 | −100.0% |
| 13F shares | 22.5M | 23.1M | −2.3% |
| Held by funds | 51.5% | 52.7% | −1.2 pts |
| New positions | 12 | 26 | −53.8% |
| Increased | 67 | 65 | +3.1% |
| Reduced | 47 | 44 | +6.8% |
| Sold out | 26 | 17 | +52.9% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in NBBK
All superinvestors →
Who owns NBBK
share of fund held shares- Index and passive funds44.6%
- Active managers and hedge funds45.9%
- Banks and brokers7.4%
- Pensions, insurers and other2.1%
The top 10 holders own 58.2% of all NBBK shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
26 funds changed their position- Mackenzie Financial CorpTrimmed−46K sh
- Principal Financial Group IncAdded+45K sh
- Creative PlanningAdded+24K sh
- Sterling Capital Management LLCAdded+13K sh
- Cambridge Investment Research Advisors, Inc.Trimmed−10K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 7.60% | 3.3M | $70.4M | +247K |
| 2 | Vanguard Capital Management LLC | 3.81% | 1.7M | $35.3M | −33K |
| 3 | AltraVue Capital, LLC | 3.78% | 1.7M | $35M | +351K |
| 4 | Pertento Partners LLP | 3.37% | 1.5M | $31.2M | −731K |
| 5 | State Street Corp | 3.36% | 1.5M | $31.1M | +178K |
| 6 | Geode Capital Management, LLC | 2.63% | 1.2M | $24.4M | +54K |
| 7 | Dimensional Fund Advisors LP | 1.72% | 753K | $15.9M | +231K |
| 8 | Goldman Sachs Group Inc | 1.31% | 572K | $12.1M | −120K |
| 9 | Tieton Capital Management, LLC | 1.25% | 547K | $11.6M | −6,970 |
| 10 | Hotchkis & Wiley Capital Management LLC | 1.14% | 501K | $10.6M | +50K |
- AltraVue Capital, LLC+351K sh+$7.4M
- BlackRock, Inc.+247K sh+$5.2M
- Dimensional Fund Advisors LP+231K sh+$4.9M
- State Street Corp+178K sh+$3.8M
- Citadel Advisors LLC+173K sh+$3.7M
- Marshall Wace, LLP+123K sh+$2.6M
- Legato Capital Management LLC+90K sh+$1.9M
- New York State Common Retirement Fund+86K sh+$1.8M
- Pertento Partners LLP−731K sh−$15.4M
- Wellington Management Group LLP−710K sh−$15M
- Sei Investments Co−160K sh−$3.4M
- Renaissance Technologies LLC−132K sh−$2.8M
- Goldman Sachs Group Inc−120K sh−$2.5M
- Two Sigma Investments, LP−95K sh−$2M
- Millennium Management LLC−77K sh−$1.6M
- Bank of America Corp /de/−70K sh−$1.5M
NBBK institutional ownership FAQ
Who owns the most NBBK stock?
In Q2 2026 13F filings the largest holder of NBBK was BlackRock, Inc., followed by Vanguard Capital Management LLC and AltraVue Capital, LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of NBBK is owned by institutions?
Funds that file 13F reports held 51.5% of NBBK's shares at Jun 30, 2026, compared with 52.7% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying NBBK?
In Q2 2026, 79 funds bought NBBK (12 of them new positions) and 73 sold (26 sold out completely). Among well known investors, 1 added and 2 cut. Our fund sentiment for NBBK is bearish.
What is NBBK's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this NBBK ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.