Who owns Northfield Bancorp (NFBK)
Which tracked institutional funds hold NFBK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See NFBK company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
36 tracked funds added or opened NFBK while 21 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
NFBK’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in NFBK divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 137 tracked filers holding NFBK, 67 increased or opened the position and 85 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in NFBK between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 2
- WITTENBERG INVESTMENT MANAGEMENT, INC.$740K
- Y-Intercept (Hong Kong) Ltd$646K
Full exits 15
- M3F, Inc.$11M
- O'SHAUGHNESSY ASSET MANAGEMENT, LLC$3M
- CSS LLC/IL$1M
- Point72 Asset Management, L.P.$1M
- Empowered Funds, LLC$1M
- Integrated Quantitative Investments LLC$963K
Largest adds
- BlackRock, Inc.$9M
- TWO SIGMA INVESTMENTS, LP$7M
- RENAISSANCE TECHNOLOGIES LLC$5M
- UBS Group AG$5M
- Ursa Fund Management, LLC$5M
- AMERICAN CENTURY COMPANIES INC$4M
Largest trims
- AQR CAPITAL MANAGEMENT LLC$2M
- Alpine Global Management, LLC$926K
- BALYASNY ASSET MANAGEMENT L.P.$809K
- BRIDGEWAY CAPITAL MANAGEMENT, LLC$703K
- IEQ CAPITAL, LLC$463K
- Yakira Capital Management, Inc.$318K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 5,401,179 | $80M | 21.3% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 2,534,326 | $37M | 10.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,706,161 | $25M | 6.7% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,567,649 | $23M | 6.2% | 2026-Q2 |
| STATE STREET CORP added | 1,243,344 | $18M | 4.9% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 1,070,028 | $16M | 4.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 977,285 | $14M | 3.8% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 967,405 | $14M | 3.8% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 939,494 | $14M | 3.7% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 814,732 | $12M | 3.2% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 715,886 | $11M | 2.8% | 2026-Q2 |
| UBS Group AG added | 464,408 | $7M | 1.8% | 2026-Q2 |
| Ursa Fund Management, LLC added | 400,000 | $6M | 1.6% | 2026-Q2 |
| FMR LLC added | 356,070 | $5M | 1.4% | 2026-Q2 |
| NORTHERN TRUST CORP added | 351,390 | $5M | 1.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 323,822 | $5M | 1.3% | 2026-Q2 |
| LMR Partners LLP | 323,091 | $5M | 1.3% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 317,068 | $5M | 1.2% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 316,355 | $5M | 1.2% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 313,624 | $5M | 1.2% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 308,645 | $5M | 1.2% | 2026-Q2 |
| Verition Fund Management LLC added | 250,000 | $4M | 1.0% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC added | 248,906 | $4M | 1.0% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 247,183 | $4M | 1.0% | 2026-Q2 |
| Bank of New York Mellon Corp added | 232,096 | $3M | 0.9% | 2026-Q2 |
| MORGAN STANLEY added | 218,891 | $3M | 0.9% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 216,252 | $3M | 0.9% | 2026-Q2 |
| Creative Planning added | 189,461 | $3M | 0.7% | 2026-Q2 |
| Quantinno Capital Management LP added | 130,024 | $2M | 0.5% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 123,556 | $2M | 0.5% | 2026-Q2 |
| TORONTO DOMINION BANK added | 119,900 | $2M | 0.5% | 2026-Q2 |
| Yakira Capital Management, Inc. trimmed | 109,874 | $2M | 0.4% | 2026-Q2 |
| Nuveen, LLC added | 106,547 | $2M | 0.4% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 101,800 | $1M | 0.4% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 79,283 | $1M | 0.3% | 2026-Q2 |
| Alpine Global Management, LLC trimmed | 75,000 | $1M | 0.3% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 74,326 | $1M | 0.3% | 2026-Q2 |
| HSBC HOLDINGS PLC | 67,111 | $980K | 0.3% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC added | 66,387 | $978K | 0.3% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 60,072 | $885K | 0.2% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 59,093 | $800K | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 57,826 | $852K | 0.2% | 2026-Q2 |
| WITTENBERG INVESTMENT MANAGEMENT, INC. new | 50,253 | $740K | 0.2% | 2026-Q2 |
| STRS OHIO added | 49,300 | $726K | 0.2% | 2026-Q2 |
| Invesco Ltd. added | 48,625 | $716K | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 48,024 | $707K | 0.2% | 2026-Q2 |
| LPL Financial LLC trimmed | 46,994 | $692K | 0.2% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 43,835 | $646K | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 43,212 | $637K | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 40,899 | $602K | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 38,502 | $567K | 0.2% | 2026-Q2 |
| CITIGROUP INC added | 34,623 | $510K | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 34,402 | $507K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 34,022 | $501K | 0.1% | 2026-Q2 |
| BARCLAYS PLC added | 32,958 | $485K | 0.1% | 2026-Q2 |
| Graham Capital Management, L.P. added | 28,562 | $421K | 0.1% | 2026-Q2 |
| Herold Advisors, Inc. | 25,926 | $382K | 0.1% | 2026-Q2 |
| MARSHALL WACE, LLP added | 25,220 | $371K | 0.1% | 2026-Q2 |
| World Investment Advisors | 22,573 | $306K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 22,554 | $332K | 0.1% | 2026-Q2 |
| Rafferty Asset Management, LLC added | 21,260 | $313K | 0.1% | 2026-Q2 |
| Rangeley Capital, LLC new | 21,000 | $309K | 0.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 19,354 | $285K | 0.1% | 2026-Q2 |
| MERCER GLOBAL ADVISORS INC /ADV trimmed | 18,905 | $278K | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 18,812 | $277K | 0.1% | 2026-Q2 |
| Sterling Capital Management LLC trimmed | 18,645 | $275K | 0.1% | 2026-Q2 |
| IEQ CAPITAL, LLC trimmed | 18,321 | $270K | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 17,358 | $256K | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 17,090 | $250K | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP trimmed | 16,520 | $243K | 0.1% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 15,439 | $227K | 0.1% | 2026-Q2 |
| IRONWOOD INVESTMENT MANAGEMENT LLC | 14,472 | $213K | 0.1% | 2026-Q2 |
| XTX Topco Ltd trimmed | 14,409 | $212K | 0.1% | 2026-Q2 |
| Vanguard Personalized Indexing Management, LLC added | 14,358 | $211K | 0.1% | 2026-Q2 |
| Princeton Global Asset Management LLC | 14,076 | $207K | 0.1% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 14,004 | $206K | 0.1% | 2026-Q2 |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC trimmed | 13,781 | $200K | 0.1% | 2026-Q2 |
| Steward Partners Investment Advisory, LLC added | 13,578 | $200K | 0.1% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 13,266 | $195K | 0.1% | 2026-Q2 |
| TIAA-CREF INDIVIDUAL & INSTITUTIONAL SERVICES, LLC | 12,890 | $190K | 0.1% | 2026-Q2 |
| Mariner, LLC trimmed | 12,382 | $182K | 0.0% | 2026-Q2 |
| KELLEHER FINANCIAL ADVISORS trimmed | 12,158 | $179K | 0.0% | 2026-Q2 |
| Vise Technologies, Inc. new | 12,057 | $178K | 0.0% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | 11,843 | $174K | 0.0% | 2026-Q2 |
| Atom Investors LP new | 11,776 | $173K | 0.0% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 11,373 | $168K | 0.0% | 2026-Q2 |
| Police & Firemen's Retirement System of New Jersey | 11,300 | $166K | 0.0% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC trimmed | 11,261 | $166K | 0.0% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND | 11,035 | $163K | 0.0% | 2026-Q2 |
| LONGFELLOW INVESTMENT MANAGEMENT CO LLC added | 10,365 | $153K | 0.0% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC trimmed | 10,223 | $151K | 0.0% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 5,415 | $80K | 0.0% | 2026-Q2 |
| SOA Wealth Advisors, LLC. added | 4,878 | $72K | 0.0% | 2026-Q2 |
| Rockefeller Capital Management L.P. trimmed | 3,803 | $56K | 0.0% | 2026-Q2 |
| Legal & General Group Plc added | 3,668 | $54K | 0.0% | 2026-Q2 |
| Allworth Financial LP trimmed | 3,295 | $49K | 0.0% | 2026-Q2 |
| Ameritas Investment Partners, Inc. | 3,026 | $45K | 0.0% | 2026-Q2 |
| SIGNATUREFD, LLC trimmed | 2,641 | $39K | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) trimmed | 2,246 | $33K | 0.0% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 1,808 | $27K | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.