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Institutional Ownership · SEC Form 13F

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.

42
Institutional holders
3M
Shares held (tracked funds)

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).

FundSharesReported value% of valueQuarter
MONEY CONCEPTS CAPITAL CORP trimmed497,482$9M12.9%2026-Q1
VANGUARD CAPITAL MANAGEMENT LLC new333,269$6M8.7%2026-Q1
DIMENSIONAL FUND ADVISORS LP trimmed315,471$6M8.2%2026-Q1
FNY Investment Advisers, LLC added252,806$5M6.6%2026-Q1
Groupe la Francaise new118,800$2M3.1%2026-Q1
Peapod Lane Capital LLC added113,662$2M3.0%2026-Q1
BlackRock, Inc. trimmed91,443$2M2.4%2026-Q1
GABELLI FUNDS LLC new90,514$2M2.4%2026-Q1
RBF Capital, LLC added89,534$2M2.3%2026-Q1
TWO SIGMA INVESTMENTS, LP added80,710$1M2.1%2026-Q1
CREDIT INDUSTRIEL ET COMMERCIAL new79,200$1M2.1%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added71,065$1M1.8%2026-Q1
AMERICAN CENTURY COMPANIES INC added68,016$1M1.8%2026-Q1
GABELLI & Co INVESTMENT ADVISERS, INC. new53,950$1M1.4%2026-Q1
Virtu Financial LLC added49,426$917K1.3%2026-Q1
VANGUARD FIDUCIARY TRUST CO new37,861$703K1.0%2026-Q1
NORTHERN TRUST CORP added33,123$615K0.9%2026-Q1
STATE STREET CORP added32,334$600K0.8%2026-Q1
Lakewood Asset Management LLC19,057$354K0.5%2026-Q1
Bank of New York Mellon Corp trimmed18,224$338K0.5%2026-Q1
PenderFund Capital Management Ltd. added17,300$321K0.4%2026-Q1
UBS Group AG added13,067$243K0.3%2026-Q1
EXCHANGE TRADED CONCEPTS, LLC new12,575$233K0.3%2026-Q1
OSAIC HOLDINGS, INC. trimmed3,760$70K0.1%2026-Q1
JPMORGAN CHASE & CO2,987$55K0.1%2026-Q1
LOM Asset Management Ltd2,800$52K0.1%2026-Q1
Vanguard Global Advisers, LLC new2,310$43K0.1%2026-Q1
FMR LLC2,275$42K0.1%2026-Q1
PNC FINANCIAL SERVICES GROUP, INC.969$18K0.0%2026-Q1
Tower Research Capital LLC (TRC) trimmed566$11K0.0%2026-Q1
MORGAN STANLEY trimmed460$9K0.0%2026-Q1
Vermillion Wealth Management, Inc.353$7K0.0%2026-Q1
Federation des caisses Desjardins du Quebec350$6K0.0%2026-Q1
CWM, LLC300$6K0.0%2026-Q1
RHUMBLINE ADVISERS298$6K0.0%2026-Q1
WELLS FARGO & COMPANY/MN added39$7250.0%2026-Q1
Archer Investment Corp10$1860.0%2026-Q1
SBI Securities Co., Ltd.1$190.0%2026-Q1
Bernard Wealth Management Corp.1$190.0%2026-Q1
CITIGROUP INC trimmed1$190.0%2026-Q1
HUNTINGTON NATIONAL BANK10.0%2026-Q1
ROYAL BANK OF CANADA trimmed10.0%2026-Q1
VANGUARD GROUP INC trimmed363,788$7M9.4%2025-Q4 stale
RENAISSANCE TECHNOLOGIES LLC added315,716$6M8.2%2025-Q4 stale
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC trimmed251,350$5M6.5%2025-Q4 stale
Truffle Hound Capital, LLC90,000$2M2.3%2025-Q4 stale
BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed48,185$894K1.3%2025-Q4 stale
O'SHAUGHNESSY ASSET MANAGEMENT, LLC added41,595$626K0.9%2025-Q3 stale
MARSHALL WACE, LLP added28,181$523K0.7%2025-Q4 stale
Empowered Funds, LLC added27,765$515K0.7%2025-Q4 stale
Linden Thomas Advisory Services, LLC added34,054$477K0.7%2025-Q1 stale
Rangeley Capital, LLC new25,113$466K0.7%2025-Q4 stale
CORSAIR CAPITAL MANAGEMENT, L.P.32,972$462K0.6%2025-Q1 stale
SUSQUEHANNA INTERNATIONAL GROUP, LLP added31,916$447K0.6%2025-Q1 stale
CITADEL ADVISORS LLC added20,631$383K0.5%2025-Q4 stale
Hikari Tsushin, Inc.14,158$263K0.4%2025-Q4 stale
RITHOLTZ WEALTH MANAGEMENT added17,417$262K0.4%2025-Q3 stale
Inspire Advisors, LLC added14,341$216K0.3%2025-Q3 stale
Integrated Wealth Concepts LLC new14,427$216K0.3%2025-Q2 stale
CIBC Private Wealth Group LLC6,000$111K0.2%2025-Q4 stale
LSV ASSET MANAGEMENT trimmed1,891$35K0.0%2025-Q4 stale
BARCLAYS PLC trimmed1,294$24K0.0%2025-Q4 stale
GLOBEFLEX CAPITAL L P1,564$23K0.0%2025-Q2 stale
LAZARD ASSET MANAGEMENT LLC added1,528$22K0.0%2025-Q2 stale
Allworth Financial LP new1,000$15K0.0%2025-Q2 stale
RAYMOND JAMES FINANCIAL INC new536$8K0.0%2025-Q2 stale
BNP PARIBAS FINANCIAL MARKETS96$1K0.0%2025-Q2 stale
ELEVATION POINT WEALTH PARTNERS, LLC new41$6130.0%2025-Q2 stale
Sound Income Strategies, LLC40$5600.0%2025-Q1 stale
NewEdge Advisors, LLC trimmed25$4640.0%2025-Q4 stale
BANK OF AMERICA CORP /DE/ added17$3160.0%2025-Q4 stale
CONCOURSE FINANCIAL GROUP SECURITIES, INC.00.0%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.

HoldersTotal shares

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.

Learn how to read institutional ownership