Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in RDNT held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 11.0M | $675.8M | +9.2% | 13.935% | 0.01% |
| 2 | RTW INVESTMENTS, LP | 4.8M | $298.9M | +13.1% | 6.164% | 2.55% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 4.1M | $250.8M | +4.3% | 5.172% | 0.01% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 3.2M | $196.9M | +2.6% | 4.061% | 0.00% |
| 5 | BECK MACK & OLIVER LLC | 3.2M | $195.1M | -0.1% | 4.023% | 3.80% |
| 6 | STATE STREET CORP | 2.8M | $175.2M | +7.2% | 3.615% | 0.00% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 1.9M | $114.6M | +7.8% | 2.364% | 0.01% |
| 8 | Invesco Ltd. | 1.6M | $101.2M | +0.5% | 2.087% | 0.01% |
| 9 | AMERICAN CENTURY COMPANIES INC | 1.6M | $99.8M | +79.4% | 2.058% | 0.04% |
| 10 | Clearbridge Investments, LLC | 1.5M | $95.4M | +21.0% | 1.967% | 0.08% |
| 11 | DIMENSIONAL FUND ADVISORS LP | 1.5M | $91.9M | +8.1% | 1.896% | 0.02% |
| 12 | Hood River Capital Management LLC | 1.5M | $89.8M | +3.2% | 1.852% | 0.65% |
| 13 | JB CAPITAL PARTNERS LP | 1.4M | $87.8M | 0.0% | 1.811% | 13.59% |
| 14 | BAMCO INC /NY/ | 1.3M | $77.8M | +55.7% | 1.604% | 0.12% |
| 15 | Defiance ETFs, LLC | 1.1M | $75.0M | +109.7% | 1.454% | 1.02% |
| 16 | GOLDMAN SACHS GROUP INC | 1.2M | $72.7M | -1.0% | 1.498% | 0.01% |
| 17 | Alyeska Investment Group, L.P. | 1.2M | $72.3M | -10.5% | 1.490% | 0.19% |
| 18 | PRINCIPAL FINANCIAL GROUP INC | 1.1M | $64.9M | -5.3% | 1.338% | 0.03% |
| 19 | WESTFIELD CAPITAL MANAGEMENT CO LP | 976K | $60.2M | +83.4% | 1.241% | 0.20% |
| 20 | MORGAN STANLEY | 931K | $57.4M | +9.5% | 1.184% | 0.00% |
| 21 | NORTHERN TRUST CORP | 813K | $50.1M | +8.9% | 1.034% | 0.01% |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 792K | $48.9M | +3.2% | 1.008% | 0.01% |
| 23 | Rockefeller Capital Management L.P. | 758K | $46.7M | +7.8% | 0.964% | 0.07% |
| 24 | AMERIPRISE FINANCIAL INC | 746K | $46.0M | -17.1% | 0.948% | 0.01% |
| 25 | Global Alpha Capital Management Ltd. | 735K | $45.3M | +11.7% | 0.934% | 2.72% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in RDNT — a direct measure of their conviction.
Filings activity in RDNT during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 329 | 3.2% | 103.01% | +5.20 pp | $4.52B | +16% |
| Q1 2026 | 340 | 0.6% | 97.81% | 1.35 pp | $3.91B | 23% |
| Q4 2025 | 342 | +6.5% | 99.16% | +2.54 pp | $5.11B | 2.6% |
| Q3 2025 | 321 | 1.2% | 96.62% | +3.52 pp | $5.25B | +39% |
| Q2 2025 | 325 | +7.6% | 93.10% | +3.05 pp | $3.77B | +20% |
| Q1 2025 | 302 | 6.2% | 90.05% | +3.70 pp | $3.14B | 25% |
| Q4 2024 | 322 | +8.4% | 86.35% | +1.44 pp | $4.19B | +2.0% |
| Q3 2024 | 297 | — | 84.91% | — | $4.11B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying RDNT stock.
Based on Q2 2026 13F filings, institutional ownership of RadNet, Inc. stands at 103.0%, held across 329 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of RDNT, with approximately 10,957,808 shares worth $0.68B as of Q2 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of RDNT.
Our composite Smart Money Score for RDNT is 41 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
35 institutions opened new positions in RDNT during Q2 2026, while 48 fully exited. 217 added to existing positions and 66 trimmed.
RDNT institutional ownership rose by 5.20 percentage points quarter-over-quarter, with a net change of -11 holders.
The top 10 institutions account for 48.8% of all reported 13F value in RDNT, and the top 25 account for 70.6%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
RadNet, Inc. (RDNT) Institutional Ownership