RadNet, Inc. (RDNT) Ownership
RDNT ownership summary
as of October 18, 2026- Institutions
- 106.1% of shares outstanding
- Insiders
- 9.96% of shares outstanding
- Shares outstanding
- 78.7M
- Float
- 65.8M shares available to trade
- Short interest
- 14.07% 9.4M shares short
- Days to cover
- 11.99 short interest down 3.2% vs prior month
- Institutions 106.08%
- Insiders 9.96%
RDNT top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 13.92% | 11.0M | $753.9M | +922,074 (+9.2%) | June 30, 2026 |
| 2 | RTW INVESTMENTS, LLC | 6.16% | 4.8M | $333.5M | +561,958 (+13.1%) | June 30, 2026 |
| 3 | T. Rowe Price Associates, Inc. | 5.72% | 4.5M | $309.7M | +346,332 (+8.3%) | June 30, 2026 |
| 4 | Vanguard Portfolio Management, LLC | 5.17% | 4.1M | $279.8M | +167,804 (+4.3%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.06% | 3.2M | $219.7M | +82,553 (+2.7%) | June 30, 2026 |
| 6 | Beck, Mack & Oliver LLC | 4.02% | 3.2M | $217.7M | −2,600 (−0.1%) | June 30, 2026 |
| 7 | State Street Corp | 3.61% | 2.8M | $195.6M | +190,859 (+7.2%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 2.36% | 1.9M | $127.9M | +134,901 (+7.8%) | June 30, 2026 |
| 9 | Amvescap Plc. | 2.09% | 1.6M | $112.9M | +7,797 (+0.5%) | June 30, 2026 |
| 10 | American Century Companies Inc | 2.06% | 1.6M | $111.3M | +716,232 (+79.4%) | June 30, 2026 |
| 11 | ClearBridge Advisors, LLC | 1.97% | 1.5M | $106.4M | +268,112 (+21.0%) | June 30, 2026 |
| 12 | Dimensional Fund Advisors, Inc. | 1.89% | 1.5M | $102.6M | +112,037 (+8.1%) | June 30, 2026 |
| 13 | Hood River Capital Management LLC | 1.85% | 1.5M | $100.2M | +44,708 (+3.2%) | June 30, 2026 |
| 14 | Jb Capital Partners LP | 1.81% | 1.4M | $98.0M | — | June 30, 2026 |
| 15 | BAMCO Inc | 1.60% | 1.3M | $86.8M | +450,926 (+55.7%) | June 30, 2026 |
| 16 | Van Berkom and Associates Inc | 1.52% | 1.2M | $82.1M | −864,104 (−42.0%) | June 30, 2026 |
| 17 | The Goldman Sachs Group Inc | 1.50% | 1.2M | $81.1M | −11,903 (−1.0%) | June 30, 2026 |
| 18 | Alyeska Investment Group, L.P. | 1.49% | 1.2M | $80.6M | −137,587 (−10.5%) | June 30, 2026 |
| 19 | Penserra Capital Management, LLC | 1.45% | 1.1M | $78.7M | +598,148 (+109.7%) | June 30, 2026 |
| 20 | Defiance ETFs, LLC | 1.45% | 1.1M | $78.7M | +598,148 (+109.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 5.2M shares and 4 cut 1.0M.
RDNT top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.39% | 4.2M | $291.7M | — | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.87% | 2.3M | $155.4M | −3,315 (−0.1%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.35% | 1.9M | $127.3M | −21,312 (−1.1%) | September 30, 2026 |
| 4 | T. Rowe Price Mid-Cap Value | 2.25% | 1.8M | $122.1M | +23,298 (+1.3%) | September 30, 2026 |
| 5 | Vanguard Small Cap Index | 2.02% | 1.6M | $109.6M | −35,334 (−2.2%) | September 30, 2026 |
| 6 | Defiance Quantum ETF | 1.43% | 1.1M | $77.2M | +6,004 (+0.5%) | September 30, 2026 |
| 7 | Baron Small Cap Retail | 1.27% | 1.0M | $68.8M | — | September 30, 2026 |
| 8 | American Century Small Cap Growth Inv | 1.23% | 969K | $66.7M | −11,972 (−1.2%) | September 30, 2026 |
| 9 | Invesco Discovery A | 1.14% | 897K | $61.7M | +74,090 (+9.0%) | August 31, 2026 |
| 10 | Vanguard MStar Small Cap Growth Indx Inv | 1.13% | 888K | $61.1M | −47,286 (−5.1%) | September 30, 2026 |
| 11 | Vanguard Explorer Inv | 1.10% | 867K | $59.7M | +272,468 (+45.8%) | June 30, 2026 |
| 12 | Fidelity Small Cap Index | 0.99% | 782K | $53.8M | +6,609 (+0.9%) | July 31, 2026 |
| 13 | Hood River Small-Cap Growth Instl | 0.93% | 729K | $50.1M | −9,575 (−1.3%) | June 30, 2026 |
| 14 | iShares Russell 2000 Growth ETF | 0.85% | 669K | $46.1M | −847 (−0.1%) | September 30, 2026 |
| 15 | State Street SPDR Port S&P 600 Sm CpETF | 0.82% | 644K | $44.3M | — | September 30, 2026 |
| 16 | Polar Capital Healthcare Opports Inc | 0.74% | 580K | $39.9M | — | August 31, 2026 |
| 17 | FullerThaler Behavioral Sm-Cp Gr R6 | 0.66% | 523K | $36.0M | +45,800 (+9.6%) | March 31, 2026 |
| 18 | Harbor Small Cap Growth Instl | 0.66% | 520K | $35.7M | +45,470 (+9.6%) | September 30, 2026 |
| 19 | T. Rowe Price Integrated US Sm Gr Eq | 0.65% | 515K | $35.4M | — | September 30, 2026 |
| 20 | ClearBridge Small Cap Growth A | 0.58% | 454K | $31.2M | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
RDNT insider transactions
latest 15| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-18 | Alma Gregory Sorensen | Sell | $62.15 | 15,000 | $932,250 |
| 2025-11-19 | Mital Patel | Sell | $80.05 | 15,080 | $1.2M |
| 2025-11-18 | Mital Patel | Sell | $80.00 | 9,920 | $793,600 |
| 2025-11-17 | Mital Patel | Sell | $76.06 | 25,000 | $1.9M |
| 2025-09-16 | Mark Stolper | Sell | $73.89 | 35,000 | $2.6M |
| 2025-09-11 | Cornelis Wesdorp | Sell | $72.13 | 500 | $36,065 |
| 2025-09-10 | Norman R Hames | Sell | $72.74 | 10,000 | $727,400 |
| 2025-09-09 | Cornelis Wesdorp | Sell | $71.99 | 500 | $35,995 |
| 2025-08-27 | Norman R Hames | Sell | $71.10 | 5,000 | $355,500 |
| 2025-08-19 | Cornelis Wesdorp | Sell | $66.98 | 1,500 | $100,470 |
| 2025-08-19 | Ranjan Jayanathan | Sell | $67.50 | 65,598 | $4.4M |
| 2025-08-13 | David Jeffrey Katz | Sell | $68.31 | 17,000 | $1.2M |
| 2025-05-23 | Alma Gregory Sorensen | Sell | $56.48 | 55,000 | $3.1M |
| 2025-05-15 | Norman R Hames | Sell | $60.00 | 5,536 | $332,160 |
| 2025-05-15 | Norman R Hames | Sell | $60.00 | 2,911 | $174,660 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
RDNT shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns RDNT
Institutional investors own 106.1% of RadNet's shares and insiders 9.96%. The largest holder is BlackRock Inc with 13.92% of the shares (11.0M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 4 reduced their stake in the latest filings. Short interest is 14.07% of the float, or 11.99 days of average trading volume. The share count rose 70.2% since 2014.
Related: RDNT analyst forecast, RDNT key metrics. See the RDNT stock overview for the latest quote and news.
RDNT ownership FAQ
Who owns the most RadNet stock?
The largest shareholders of RadNet are BlackRock Inc (13.92%), RTW INVESTMENTS, LLC (6.16%), T. Rowe Price Associates, Inc. (5.72%), Vanguard Portfolio Management, LLC (5.17%), Vanguard Capital Management, LLC (4.06%).
What percentage of RadNet is owned by institutions?
Institutions hold 106.1% of RadNet's shares outstanding; insiders hold 9.96%.
Which funds own RadNet?
The largest fund holders of RadNet are iShares Core S&P Small-Cap ETF (5.39%), Vanguard MStar Total Stk Mkt Idx Invest (2.87%), iShares Russell 2000 ETF (2.35%), T. Rowe Price Mid-Cap Value (2.25%), Vanguard Small Cap Index (2.02%).
What is RadNet's short interest?
9.4M shares of RadNet were sold short, 14.07% of the float; at the average daily volume it would take 11.99 days to cover.
Are insiders buying or selling RadNet?
Of the latest 15 reported insider transactions in RadNet (since May 15, 2025), 0 were purchases and 15 were sales.
How many shares of RadNet are outstanding?
RadNet has 78.7M shares outstanding, of which 65.8M are in the public float.