Who owns NN, Inc. (NNBR)
Which tracked institutional funds hold NNBR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See NNBR company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-18). 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
The tracked-fund tape on NNBR is one-sided between 2025-Q4 and 2026-Q1: 9 added or opened and 3 trimmed or exited — on balance accumulating.
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
NNBR’s largest tracked holder by dollar value, Corre Partners Management, LLC, sizes it at 13.9% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 13.9pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in NNBR 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 2025-Q4 and 2026-Q1, across 66 tracked filers holding NNBR, 31 increased or opened the position and 27 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 NNBR between the 2025-Q4 and 2026-Q1 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 1
- VANGUARD CAPITAL MANAGEMENT LLC$3M
Full exits 1
- VANGUARD GROUP INC$3M
Largest adds
- Corre Partners Management, LLC$1M
- FIRST MANHATTAN CO. LLC.$993K
- Legion Partners Asset Management, LLC$815K
- RBF Capital, LLC$589K
- Nantahala Capital Management, LLC$415K
- Register Financial Advisors LLC$338K
Largest trims
- NOMURA HOLDINGS INC$1M
- DIMENSIONAL FUND ADVISORS LP$343K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Corre Partners Management, LLC | 6,205,631 | $9M | 16.9% | 2026-Q1 |
| Legion Partners Asset Management, LLC | 4,791,929 | $7M | 13.1% | 2026-Q1 |
| FIRST MANHATTAN CO. LLC. added | 3,336,800 | $5M | 9.1% | 2026-Q1 |
| Nantahala Capital Management, LLC | 2,441,416 | $4M | 6.7% | 2026-Q1 |
| NOMURA HOLDINGS INC trimmed | 1,944,832 | $3M | 5.3% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,931,713 | $3M | 5.3% | 2026-Q1 |
| MORGAN STANLEY trimmed | 1,536,066 | $2M | 4.2% | 2026-Q1 |
| Register Financial Advisors LLC added | 1,311,363 | $2M | 3.6% | 2026-Q1 |
| RBF Capital, LLC added | 834,929 | $1M | 2.3% | 2026-Q1 |
| BlackRock, Inc. added | 741,792 | $1M | 2.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 671,688 | $974K | 1.8% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 549,040 | $796K | 1.5% | 2026-Q1 |
| De Lisle Partners LLP added | 466,421 | $672K | 1.3% | 2026-Q1 |
| Pacific Ridge Capital Partners, LLC added | 413,556 | $600K | 1.1% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 294,531 | $427K | 0.8% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 282,019 | $409K | 0.8% | 2026-Q1 |
| Squarepoint Ops LLC added | 277,425 | $402K | 0.8% | 2026-Q1 |
| Johnson Financial Group, LLC new | 270,494 | $392K | 0.7% | 2026-Q1 |
| GSA CAPITAL PARTNERS LLP trimmed | 265,333 | $385K | 0.7% | 2026-Q1 |
| JANE STREET GROUP, LLC added | 263,960 | $383K | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 255,077 | $370K | 0.7% | 2026-Q1 |
| STATE STREET CORP added | 210,509 | $305K | 0.6% | 2026-Q1 |
| PARADIGM CAPITAL MANAGEMENT INC/NY | 200,000 | $290K | 0.5% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 173,640 | $252K | 0.5% | 2026-Q1 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 169,962 | $246K | 0.5% | 2026-Q1 |
| MARSHALL WACE, LLP trimmed | 115,879 | $168K | 0.3% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 114,535 | $165K | 0.3% | 2026-Q1 |
| Empowered Funds, LLC | 104,459 | $151K | 0.3% | 2026-Q1 |
| XTX Topco Ltd added | 103,169 | $150K | 0.3% | 2026-Q1 |
| Clearstead Advisors, LLC | 100,000 | $145K | 0.3% | 2026-Q1 |
| NORTHERN TRUST CORP | 86,237 | $125K | 0.2% | 2026-Q1 |
| Corient Private Wealth LLC added | 72,500 | $105K | 0.2% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 63,163 | $92K | 0.2% | 2026-Q1 |
| GABELLI FUNDS LLC | 61,000 | $88K | 0.2% | 2026-Q1 |
| CIBC Bancorp USA Inc. new | 60,000 | $87K | 0.2% | 2026-Q1 |
| Centiva Capital, LP added | 57,511 | $83K | 0.2% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ | 50,000 | $72K | 0.1% | 2026-Q1 |
| LAUREL OAK WEALTH MANAGEMENT, LLC new | 50,000 | $72K | 0.1% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 43,571 | $63K | 0.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 28,401 | $41K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 28,423 | $41K | 0.1% | 2026-Q1 |
| WYNNEFIELD CAPITAL INC | 28,128 | $41K | 0.1% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 27,025 | $39K | 0.1% | 2026-Q1 |
| Quinn Opportunity Partners LLC | 25,000 | $36K | 0.1% | 2026-Q1 |
| Quadrature Capital Ltd trimmed | 20,802 | $30K | 0.1% | 2026-Q1 |
| Invesco Ltd. trimmed | 19,073 | $28K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 15,523 | $23K | 0.0% | 2026-Q1 |
| Virtu Financial LLC trimmed | 15,094 | $22K | 0.0% | 2026-Q1 |
| Nierenberg Investment Management Company, LLC | 13,555 | $20K | 0.0% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 13,022 | $19K | 0.0% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC trimmed | 11,831 | $17K | 0.0% | 2026-Q1 |
| Qube Research & Technologies Ltd trimmed | 11,680 | $17K | 0.0% | 2026-Q1 |
| Addison Advisors LLC | 10,822 | $16K | 0.0% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 10,200 | $15K | 0.0% | 2026-Q1 |
| UBS Group AG trimmed | 9,958 | $14K | 0.0% | 2026-Q1 |
| Covestor Ltd | 4,366 | $6K | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC added | 2,202,313 | $3M | 5.3% | 2025-Q4 stale |
| KENNEDY CAPITAL MANAGEMENT LLC trimmed | 488,295 | $1M | 2.1% | 2025-Q1 stale |
| PRIMECAP MANAGEMENT CO/CA/ | 299,200 | $676K | 1.3% | 2025-Q1 stale |
| Ancora Advisors LLC added | 290,770 | $599K | 1.1% | 2025-Q3 stale |
| Y-Intercept (Hong Kong) Ltd added | 163,387 | $343K | 0.6% | 2025-Q2 stale |
| Bank of New York Mellon Corp | 106,615 | $241K | 0.5% | 2025-Q1 stale |
| BARCLAYS PLC added | 60,684 | $237K | 0.4% | 2025-Q3 stale |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. new | 179,677 | $230K | 0.4% | 2025-Q4 stale |
| Nuveen, LLC new | 62,006 | $140K | 0.3% | 2025-Q1 stale |
| AMERICAN CENTURY COMPANIES INC trimmed | 67,106 | $138K | 0.3% | 2025-Q3 stale |
| HSBC HOLDINGS PLC added | 57,753 | $119K | 0.2% | 2025-Q2 stale |
| Aster Capital Management (DIFC) Ltd new | 56,128 | $118K | 0.2% | 2025-Q2 stale |
| RHUMBLINE ADVISERS trimmed | 43,282 | $98K | 0.2% | 2025-Q1 stale |
| Jain Global LLC new | 44,219 | $93K | 0.2% | 2025-Q2 stale |
| CAPTRUST FINANCIAL ADVISORS added | 70,012 | $90K | 0.2% | 2025-Q4 stale |
| INTECH INVESTMENT MANAGEMENT LLC added | 34,794 | $79K | 0.1% | 2025-Q1 stale |
| J.W. COLE ADVISORS, INC. added | 90,600 | $64K | 0.1% | 2025-Q4 stale |
| MILLENNIUM MANAGEMENT LLC trimmed | 48,859 | $63K | 0.1% | 2025-Q4 stale |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 27,576 | $62K | 0.1% | 2025-Q1 stale |
| Corebridge Financial, Inc. trimmed | 22,791 | $52K | 0.1% | 2025-Q1 stale |
| DEUTSCHE BANK AG\ | 21,994 | $50K | 0.1% | 2025-Q1 stale |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 18,629 | $42K | 0.1% | 2025-Q1 stale |
| BAILARD, INC. trimmed | 17,426 | $39K | 0.1% | 2025-Q1 stale |
| Point72 Asia (Singapore) Pte. Ltd. trimmed | 18,657 | $38K | 0.1% | 2025-Q3 stale |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 17,758 | $37K | 0.1% | 2025-Q2 stale |
| SG Americas Securities, LLC trimmed | 15,443 | $35K | 0.1% | 2025-Q1 stale |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 13,360 | $30K | 0.1% | 2025-Q1 stale |
| Mariner, LLC new | 13,085 | $30K | 0.1% | 2025-Q1 stale |
| Hudson Bay Capital Management LP new | 13,840 | $29K | 0.1% | 2025-Q2 stale |
| NINE MASTS CAPITAL Ltd new | 22,422 | $29K | 0.1% | 2025-Q4 stale |
| Catalyst Funds Management Pty Ltd new | 12,900 | $27K | 0.1% | 2025-Q2 stale |
| DRW Securities, LLC new | 12,600 | $26K | 0.0% | 2025-Q2 stale |
| CIBC WORLD MARKETS CORP new | 10,323 | $23K | 0.0% | 2025-Q1 stale |
| ProShare Advisors LLC trimmed | 10,072 | $23K | 0.0% | 2025-Q1 stale |
| WELLS FARGO & COMPANY/MN trimmed | 10,612 | $22K | 0.0% | 2025-Q2 stale |
| Police & Firemen's Retirement System of New Jersey | 9,258 | $21K | 0.0% | 2025-Q1 stale |
| NEW YORK STATE COMMON RETIREMENT FUND | 7,200 | $16K | 0.0% | 2025-Q1 stale |
| TWO SIGMA ADVISERS, LP trimmed | 10,500 | $13K | 0.0% | 2025-Q4 stale |
| RAYMOND JAMES FINANCIAL INC new | 5,900 | $12K | 0.0% | 2025-Q2 stale |
| Ameritas Advisory Services, LLC new | 5,000 | $10K | 0.0% | 2025-Q3 stale |
| Ameritas Investment Partners, Inc. | 4,511 | $10K | 0.0% | 2025-Q1 stale |
| Cubist Systematic Strategies, LLC added | 4,547 | $9K | 0.0% | 2025-Q3 stale |
| Legal & General Group Plc | 3,979 | $9K | 0.0% | 2025-Q1 stale |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 3,337 | $8K | 0.0% | 2025-Q1 stale |
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.