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RDNT · RadNet, Inc. · Holdings

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Market Cap
$5.85B
Shares
78.70M

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: 331
Total Value: $5,023,375,987
Total Shares: 81,455,789
Showing 1–100 of 336 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 331 13F filers · Δ vs Mar 31, 2026
Top Holder
13.5%
Sep 2023 → Jun 2026 · range 12.7% – 16.8%
+0.5 pts
Top 5
33.8%
Sep 2023 → Jun 2026 · range 33.1% – 39.1%
+0.8 pts
Top 10
47.5%
Sep 2023 → Jun 2026 · range 45.6% – 54.3%
+0.8 pts
HHI
375
Sep 2023 → Jun 2026 · range 356 – 510
Broadly held+18

Quarterly Activity

vs Mar 31, 2026
New
41
Increased
133
Decreased
112
Sold Out
54
Unchanged
45
Holder count: -13
Institutional value: +16.3%
Shares held: +5.4%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 336
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 790526 CUSIP 750491102 13F (30d) 125 filings 125 filers Visit website Investor relations