RDNT RadNet Inc.

NASDAQ
$75.78

RadNet Inc. (RDNT) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
-30.43
8 buyers / 15 sellers
STRONG SELLING
Funds compared
23
funds with comparable RDNT positions
13 current holders · 20 prior-quarter holders
Net share change
+407.2K
+1.26M added, -857.4K cut
Position activity
3 new 5 increased 5 reduced 10 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
D. E. Shaw & Co., Inc. Quant Sold Out -50.5K -100.0% $3.1M 0.0% 60
CITADEL ADVISORS LLC Quant Sold Out -23.7K -100.0% $1.5M 0.0% 60
ADAGE CAPITAL PARTNERS GP, L.L.C. New +80.1K — $4.9M 0.0% 58
TWO SIGMA INVESTMENTS, LP Quant Sold Out -4.9K -100.0% $299.5K 0.0% 57
Magnetar Capital Event Quant Sold Out -30.8K -100.0% $1.9M 0.0% 57
Squarepoint Ops LLC Quant Sold Out -58.5K -100.0% $3.6M 0.0% 57
Verition Fund Management Event Long/Short Sold Out -55.7K -100.0% $3.4M 0.0% 56
MILLENNIUM MANAGEMENT LLC Increased +419.0K +899.7% $25.8M 0.0% 55
Portolan Capital Management Long/Short Sold Out -23.7K -100.0% $1.5M 0.0% 54
Tudor Investment Corporation Macro Sold Out -8.8K -100.0% $541.5K 0.0% 53

Most significant buyers

By move score, not size.

  • ADAGE CAPITAL PARTNERS GP, L.L.C. New · +80.1K
  • MILLENNIUM MANAGEMENT LLC Increased · +419.0K
  • Schonfeld Strategic Advisors New · +115.3K
  • RTW Investments Increased · +562.0K
  • Engineers Gate New · +8.1K

Most significant sellers

By move score, not size.

  • D. E. Shaw & Co., Inc. Sold Out · -50.5K
  • CITADEL ADVISORS LLC Sold Out · -23.7K
  • TWO SIGMA INVESTMENTS, LP Sold Out · -4.9K
  • Magnetar Capital Sold Out · -30.8K
  • Squarepoint Ops LLC Sold Out · -58.5K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
D. E. Shaw & Co., Inc. 1 0 50.5K -50.5K -100.0% 0.0% Sold Out 60
CITADEL ADVISORS LLC 1 0 23.7K -23.7K -100.0% 0.0% Sold Out 60
ADAGE CAPITAL PARTNERS GP, L.L.C. 2 80.1K 0 +80.1K — 0.0% New 58
TWO SIGMA INVESTMENTS, LP 2 0 4.9K -4.9K -100.0% 0.0% Sold Out 57
Magnetar Capital 2 0 30.8K -30.8K -100.0% 0.0% Sold Out 57
Squarepoint Ops LLC 2 0 58.5K -58.5K -100.0% 0.0% Sold Out 57
Verition Fund Management 2 0 55.7K -55.7K -100.0% 0.0% Sold Out 56
MILLENNIUM MANAGEMENT LLC 2 465.6K 46.6K +419.0K +899.7% 0.0% Increased 55
Portolan Capital Management 3 0 23.7K -23.7K -100.0% 0.0% Sold Out 54
Tudor Investment Corporation 2 0 8.8K -8.8K -100.0% 0.0% Sold Out 53
Schonfeld Strategic Advisors 3 115.3K 0 +115.3K — 0.0% New 53
Edgestream Partners 4 0 41.6K -41.6K -100.0% 0.0% Sold Out 51
RTW Investments 1 4.8M 4.3M +562.0K +13.1% 2.6% Increased 50
Boothbay Fund Management 4 0 9.9K -9.9K -100.0% 0.0% Sold Out 49
Engineers Gate 4 8.1K 0 +8.1K — 0.0% New 48
Balyasny Asset Management L.P. 2 60.7K 34.2K +26.4K +77.2% 0.0% Increased 48
AQR Capital Management 3 49.6K 15.5K +34.0K +219.0% 0.0% Increased 47
Alpha Wave Global 1 472.6K 478.3K -5.7K -1.2% 0.5% Reduced 46
Walleye Capital 3 2 3.5K -3.5K -99.9% 0.0% Reduced 45
Point72 Asset Management, L.P. 1 492.4K 855.4K -362.9K -42.4% 0.0% Reduced 43
Holocene Advisors, LP 2 80.4K 120.2K -39.7K -33.1% 0.0% Reduced 35
Man Group 3 76.8K 57.2K +19.6K +34.3% 0.0% Increased 31
Alyeska Investment Group, L.P. 2 1.2M 1.3M -137.6K -10.5% 0.2% Reduced 31

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.