Who owns FONAR Corporation (FONR)
Which tracked institutional funds hold FONR, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See FONR company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-21). 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
10 tracked funds added or opened FONR while 8 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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
FONR’s largest tracked holder by dollar value, MONEY CONCEPTS CAPITAL CORP, sizes it at 0.5% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.5pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in FONR 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 42 tracked filers holding FONR, 20 increased or opened the position and 24 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 FONR 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 8
- VANGUARD CAPITAL MANAGEMENT LLC$6M
- FNY Investment Advisers, LLC$5M
- Groupe la Francaise$2M
- GABELLI FUNDS LLC$2M
- TWO SIGMA INVESTMENTS, LP$1M
- CREDIT INDUSTRIEL ET COMMERCIAL$1M
Full exits 7
- VANGUARD GROUP INC$7M
- RENAISSANCE TECHNOLOGIES LLC$6M
- KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC$5M
- Truffle Hound Capital, LLC$2M
- BRIDGEWAY CAPITAL MANAGEMENT, LLC$894K
- MARSHALL WACE, LLP$523K
Largest adds
- AMERICAN CENTURY COMPANIES INC$705K
- RBF Capital, LLC$261K
Largest trims
- DIMENSIONAL FUND ADVISORS LP$1M
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 |
|---|---|---|---|---|
| MONEY CONCEPTS CAPITAL CORP trimmed | 497,482 | $9M | 12.9% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 333,269 | $6M | 8.7% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 315,471 | $6M | 8.2% | 2026-Q1 |
| FNY Investment Advisers, LLC added | 252,806 | $5M | 6.6% | 2026-Q1 |
| Groupe la Francaise new | 118,800 | $2M | 3.1% | 2026-Q1 |
| Peapod Lane Capital LLC added | 113,662 | $2M | 3.0% | 2026-Q1 |
| BlackRock, Inc. trimmed | 91,443 | $2M | 2.4% | 2026-Q1 |
| GABELLI FUNDS LLC new | 90,514 | $2M | 2.4% | 2026-Q1 |
| RBF Capital, LLC added | 89,534 | $2M | 2.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 80,710 | $1M | 2.1% | 2026-Q1 |
| CREDIT INDUSTRIEL ET COMMERCIAL new | 79,200 | $1M | 2.1% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 71,065 | $1M | 1.8% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 68,016 | $1M | 1.8% | 2026-Q1 |
| GABELLI & Co INVESTMENT ADVISERS, INC. new | 53,950 | $1M | 1.4% | 2026-Q1 |
| Virtu Financial LLC added | 49,426 | $917K | 1.3% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 37,861 | $703K | 1.0% | 2026-Q1 |
| NORTHERN TRUST CORP added | 33,123 | $615K | 0.9% | 2026-Q1 |
| STATE STREET CORP added | 32,334 | $600K | 0.8% | 2026-Q1 |
| Lakewood Asset Management LLC | 19,057 | $354K | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 18,224 | $338K | 0.5% | 2026-Q1 |
| PenderFund Capital Management Ltd. added | 17,300 | $321K | 0.4% | 2026-Q1 |
| UBS Group AG added | 13,067 | $243K | 0.3% | 2026-Q1 |
| EXCHANGE TRADED CONCEPTS, LLC new | 12,575 | $233K | 0.3% | 2026-Q1 |
| OSAIC HOLDINGS, INC. trimmed | 3,760 | $70K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO | 2,987 | $55K | 0.1% | 2026-Q1 |
| LOM Asset Management Ltd | 2,800 | $52K | 0.1% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 2,310 | $43K | 0.1% | 2026-Q1 |
| FMR LLC | 2,275 | $42K | 0.1% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. | 969 | $18K | 0.0% | 2026-Q1 |
| Tower Research Capital LLC (TRC) trimmed | 566 | $11K | 0.0% | 2026-Q1 |
| MORGAN STANLEY trimmed | 460 | $9K | 0.0% | 2026-Q1 |
| Vermillion Wealth Management, Inc. | 353 | $7K | 0.0% | 2026-Q1 |
| Federation des caisses Desjardins du Quebec | 350 | $6K | 0.0% | 2026-Q1 |
| CWM, LLC | 300 | $6K | 0.0% | 2026-Q1 |
| RHUMBLINE ADVISERS | 298 | $6K | 0.0% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 39 | $725 | 0.0% | 2026-Q1 |
| Archer Investment Corp | 10 | $186 | 0.0% | 2026-Q1 |
| SBI Securities Co., Ltd. | 1 | $19 | 0.0% | 2026-Q1 |
| Bernard Wealth Management Corp. | 1 | $19 | 0.0% | 2026-Q1 |
| CITIGROUP INC trimmed | 1 | $19 | 0.0% | 2026-Q1 |
| HUNTINGTON NATIONAL BANK | 1 | — | 0.0% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 1 | — | 0.0% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 363,788 | $7M | 9.4% | 2025-Q4 stale |
| RENAISSANCE TECHNOLOGIES LLC added | 315,716 | $6M | 8.2% | 2025-Q4 stale |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC trimmed | 251,350 | $5M | 6.5% | 2025-Q4 stale |
| Truffle Hound Capital, LLC | 90,000 | $2M | 2.3% | 2025-Q4 stale |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 48,185 | $894K | 1.3% | 2025-Q4 stale |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC added | 41,595 | $626K | 0.9% | 2025-Q3 stale |
| MARSHALL WACE, LLP added | 28,181 | $523K | 0.7% | 2025-Q4 stale |
| Empowered Funds, LLC added | 27,765 | $515K | 0.7% | 2025-Q4 stale |
| Linden Thomas Advisory Services, LLC added | 34,054 | $477K | 0.7% | 2025-Q1 stale |
| Rangeley Capital, LLC new | 25,113 | $466K | 0.7% | 2025-Q4 stale |
| CORSAIR CAPITAL MANAGEMENT, L.P. | 32,972 | $462K | 0.6% | 2025-Q1 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 31,916 | $447K | 0.6% | 2025-Q1 stale |
| CITADEL ADVISORS LLC added | 20,631 | $383K | 0.5% | 2025-Q4 stale |
| Hikari Tsushin, Inc. | 14,158 | $263K | 0.4% | 2025-Q4 stale |
| RITHOLTZ WEALTH MANAGEMENT added | 17,417 | $262K | 0.4% | 2025-Q3 stale |
| Inspire Advisors, LLC added | 14,341 | $216K | 0.3% | 2025-Q3 stale |
| Integrated Wealth Concepts LLC new | 14,427 | $216K | 0.3% | 2025-Q2 stale |
| CIBC Private Wealth Group LLC | 6,000 | $111K | 0.2% | 2025-Q4 stale |
| LSV ASSET MANAGEMENT trimmed | 1,891 | $35K | 0.0% | 2025-Q4 stale |
| BARCLAYS PLC trimmed | 1,294 | $24K | 0.0% | 2025-Q4 stale |
| GLOBEFLEX CAPITAL L P | 1,564 | $23K | 0.0% | 2025-Q2 stale |
| LAZARD ASSET MANAGEMENT LLC added | 1,528 | $22K | 0.0% | 2025-Q2 stale |
| Allworth Financial LP new | 1,000 | $15K | 0.0% | 2025-Q2 stale |
| RAYMOND JAMES FINANCIAL INC new | 536 | $8K | 0.0% | 2025-Q2 stale |
| BNP PARIBAS FINANCIAL MARKETS | 96 | $1K | 0.0% | 2025-Q2 stale |
| ELEVATION POINT WEALTH PARTNERS, LLC new | 41 | $613 | 0.0% | 2025-Q2 stale |
| Sound Income Strategies, LLC | 40 | $560 | 0.0% | 2025-Q1 stale |
| NewEdge Advisors, LLC trimmed | 25 | $464 | 0.0% | 2025-Q4 stale |
| BANK OF AMERICA CORP /DE/ added | 17 | $316 | 0.0% | 2025-Q4 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 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.