FONR · Fonar Corp
$19.09
+0.00 (+0.00%)
At close · Jun 3
Market Cap
$13.29M
Shares
696,097
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 41
Total Value: $53,449,249
Total Shares: 2,879,810
Institutional Ownership Trend
25 quarters
Holder Concentration
Across 41 13F filers · Δ vs Dec 31, 2025Top Holder
19.8%
+0.1 pts
Top 5
60.6%
−9.6 pts
Top 10
79.1%
−7.7 pts
HHI
965
Broadly held−146
Quarterly Activity
vs Dec 31, 2025
New
10
Increased
10
Decreased
9
Sold Out
14
Unchanged
12
Holder count:
-4
Institutional value:
+11.3%
Shares held:
+11.3%
Top Buyers
vs Dec 31, 2025| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega AMERICAN CENTURY COMPANIES INC | +37,969 | 68,016 | |
| Mid RBF Capital, LLC | +14,087 | 89,534 | |
| Mega UBS Group AG | +12,165 | 13,067 | |
| Mega STATE STREET CORP | +9,840 | 32,334 | |
| Small PenderFund Capital Management Ltd. | +9,200 | 17,300 |
Top Sellers
vs Dec 31, 2025| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mega DIMENSIONAL FUND ADVISORS LP | −57,846 | 315,471 | |
| Small MONEY CONCEPTS CAPITAL CORP | −13,190 | 497,482 | |
| Mega Bank of New York Mellon Corp | −4,284 | 18,224 | |
| Mega MORGAN STANLEY | −1,540 | 460 | |
| Large OSAIC HOLDINGS, INC. | −206 | 3,760 |
Top New Positions
vs Dec 31, 2025| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD CAPITAL MANAGEMENT LLC | 706,709 | $13,116,518 | |
| Small FNY Investment Advisers, LLC | 252,806 | $4,692,079 | |
| Mid Groupe la Francaise | 118,800 | $2,204,928 | |
| Large GABELLI FUNDS LLC | 90,514 | $1,679,939 | |
| Mega TWO SIGMA INVESTMENTS, LP | 80,710 | $1,497,977 |
Top Sold-Out Positions
vs Dec 31, 2025| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mega VANGUARD GROUP INC | 363,788 | $6,751,904 | |
| Large RENAISSANCE TECHNOLOGIES LLC | 315,716 | $5,859,688 | |
| Large KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC | 251,350 | $4,665,056 | |
| Small Truffle Hound Capital, LLC | 90,000 | $1,670,400 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | 48,185 | $894,313 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Small MONEY CONCEPTS CAPITAL CORP | $9,233,265 | 17.27% | 497,482 | Shares | Sole | 2026-04-30 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $6,931,046 | 12.97% | 373,440 | Shares | Sole | 2026-04-29 | ||||
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $6,185,472 | 11.57% | 333,269 | Shares | Defined | 2026-05-15 | ||||
| Mega DIMENSIONAL FUND ADVISORS LP | $5,855,141 | 10.95% | 315,471 | Shares | Sole | 2026-05-07 | ||||
| Small FNY Investment Advisers, LLC | $4,692,079 | 8.78% | 252,806 | Shares | Sole | 2026-04-15 | ||||
| Mid Groupe la Francaise | $2,204,928 | 4.13% | 118,800 | Shares | Defined | 2026-05-21 | ||||
| Small Peapod Lane Capital LLC | $2,109,566 | 3.95% | 113,662 | Shares | Sole | 2026-05-04 | ||||
| Mega BlackRock, Inc. | $1,697,181 | 3.18% | 91,443 | Shares | Sole | 2026-05-13 | ||||
| Large GABELLI FUNDS LLC | $1,679,939 | 3.14% | 90,514 | Shares | Sole | 2026-05-14 | ||||
| Mid RBF Capital, LLC | $1,661,751 | 3.11% | 89,534 | Shares | Sole | 2026-05-18 | ||||
| Mega TWO SIGMA INVESTMENTS, LP | $1,497,977 | 2.80% | 80,710 | Shares | Sole | 2026-05-15 | ||||
| Small CREDIT INDUSTRIEL ET COMMERCIAL | $1,469,952 | 2.75% | 79,200 | Shares | Defined | 2026-04-29 | ||||
| Mega GEODE CAPITAL MANAGEMENT, LLC | $1,318,966 | 2.47% | 71,065 | Shares | Defined | 2026-05-15 | ||||
| Mega AMERICAN CENTURY COMPANIES INC | $1,262,376 | 2.36% | 68,016 | Shares | Defined | 2026-05-15 | ||||
| Small GABELLI & Co INVESTMENT ADVISERS, INC. | $1,001,312 | 1.87% | 53,950 | Shares | Sole | 2026-05-14 | ||||
| Mid Virtu Financial LLC | $917,346 | 1.72% | 49,426 | Shares | Defined | 2026-05-14 | ||||
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $702,700 | 1.31% | 37,861 | Shares | Defined | 2026-05-08 | ||||
| Mega NORTHERN TRUST CORP Bank | $614,762 | 1.15% | 33,123 | Shares | Defined | 2026-05-14 | ||||
| Mega STATE STREET CORP | $600,119 | 1.12% | 32,334 | Shares | Defined | 2026-05-15 | ||||
| Micro Lakewood Asset Management LLC | $353,697 | 0.66% | 19,057 | Shares | Sole | 2026-04-23 | ||||
| Mega Bank of New York Mellon Corp Bank | $338,236 | 0.63% | 18,224 | Shares | Defined | 2026-05-05 | ||||
| Small PenderFund Capital Management Ltd. | $321,088 | 0.60% | 17,300 | Shares | Sole | 2026-05-15 | ||||
| Mega UBS Group AG | $242,523 | 0.45% | 13,067 | Shares | Defined | 2026-05-05 | ||||
| Large EXCHANGE TRADED CONCEPTS, LLC | $233,392 | 0.44% | 12,575 | Shares | Sole | 2026-04-15 | ||||
| Large OSAIC HOLDINGS, INC. | $69,785 | 0.13% | 3,760 | Shares | Defined | 2026-05-15 | ||||
| Mega JPMORGAN CHASE & CO | $55,438 | 0.10% | 2,987 | Shares | Defined | 2026-05-13 | ||||
| Small LOM Asset Management Ltd | $51,968 | 0.10% | 2,800 | Shares | Sole | 2026-05-05 | ||||
| Mega Vanguard Global Advisers, LLC | $42,873 | 0.08% | 2,310 | Shares | Defined | 2026-05-08 | ||||
| Mega FMR LLC | $42,224 | 0.08% | 2,275 | Shares | Defined | 2026-05-15 | ||||
| Mega PNC FINANCIAL SERVICES GROUP, INC. | $17,982 | 0.03% | 969 | Shares | Defined | 2026-05-08 | ||||
| Mid Tower Research Capital LLC (TRC) | $10,504 | 0.02% | 566 | Shares | Defined | 2026-05-15 | ||||
| Mega MORGAN STANLEY | $8,536 | 0.02% | 460 | Shares | Defined | 2026-05-15 | ||||
| Micro Vermillion Wealth Management, Inc. | $6,551 | 0.01% | 353 | Shares | Sole | 2026-04-17 | ||||
| Large Federation des caisses Desjardins du Quebec | $6,496 | 0.01% | 350 | Shares | Defined | 2026-05-14 | ||||
| Large CWM, LLC | $5,568 | 0.01% | 300 | Shares | Sole | 2026-05-14 | ||||
| Mega RHUMBLINE ADVISERS | $5,530 | 0.01% | 298 | Shares | Sole | 2026-05-12 | ||||
| Mega WELLS FARGO & COMPANY/MN | $723 | 0.00% | 39 | Shares | Defined | 2026-05-11 | ||||
| Small Archer Investment Corp | $185 | 0.00% | 10 | Shares | Sole | 2026-05-04 | ||||
| Mid SBI Securities Co., Ltd. Broker-Dealer | $18 | 0.00% | 1 | Shares | Defined | 2026-04-28 | ||||
| Mega CITIGROUP INC | $18 | 0.00% | 1 | Shares | Defined | 2026-05-11 | ||||
| Mega ROYAL BANK OF CANADA Bank | $18 | 0.00% | 1 | Shares | Defined | 2026-05-15 | ||||
| Small Bernard Wealth Management Corp. | $18 | 0.00% | 1 | Shares | Sole | 2026-05-15 | ||||
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