RADNET INC RDNT
COM · Common Stock · CUSIP 750491102 · ISIN US7504911022
- SectorHealth care
- IndustryServices-Medical Laboratories
- HeadquartersLos Angeles, CA
- Websiteradnet.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($4.6m this quarter). Holder counts are more reliable. Shares outstanding: 74.0m as of 2024-11-08, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $69.86. Options: 9 managers hold calls ($7.2m notional), 8 hold puts ($6.9m).
Trends to Q4 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 154 |
| Q4 2022 | 146 |
| Q1 2023 | 153 |
| Q2 2023 | 187 |
| Q3 2023 | 192 |
| Q4 2023 | 215 |
| Q1 2024 | 278 |
| Q2 2024 | 279 |
| Q3 2024 | 305 |
| Q4 2024 | 332 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2023 | 67 | 65 |
| Q2 2023 | 112 | 52 |
| Q3 2023 | 115 | 78 |
| Q4 2023 | 104 | 90 |
| Q1 2024 | 168 | 87 |
| Q2 2024 | 142 | 141 |
| Q3 2024 | 154 | 125 |
| Q4 2024 | 159 | 137 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2024 | $5.6m | $8.4m | 1.50 |
| Q2 2024 | $9.3m | $12.2m | 1.31 |
| Q3 2024 | $7.5m | $18.3m | 2.45 |
| Q4 2024 | $7.2m | $6.9m | 0.96 |
Biggest buyers
| GOLDMAN SACHS GROUP INC | Added | +446.1k |
| T. Rowe Price Investment Management, Inc. | Added | +404.2k |
| Tidal Investments LLC | Added | +384.0k |
| Allspring Global Investments Holdings, LLC | Added | +344.1k |
| Alyeska Investment Group, L.P. | Added | +261.7k |
| BlackRock, Inc. | Added | +236.0k |
| Munro Partners | Added | +213.6k |
| Clearbridge Investments, LLC | Added | +207.6k |
| WCM INVESTMENT MANAGEMENT, LLC | New | +198.7k |
| RTW INVESTMENTS, LP | Added | +170.0k |
Biggest sellers
| MILLENNIUM MANAGEMENT LLC | Reduced | -708.6k |
| Alpha Wave Global, LP | Reduced | -491.5k |
| Global Alpha Capital Management Ltd. | Reduced | -473.0k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -220.7k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -206.0k |
| Woodline Partners LP | Reduced | -176.0k |
| Cerity Partners LLC | Reduced | -163.8k |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | -157.2k |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | -152.2k |
| BECK MACK & OLIVER LLC | Reduced | -129.5k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $4.0m57.7k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.0m14.9k shares |
| WOLVERINE TRADING, LLC | New | $902.0k12.7k shares |
| JANE STREET GROUP, LLC | Reduced | $460.9k6.6k shares |
| TUDOR INVESTMENT CORP ET AL | Added | $419.0k6.0k shares |
| Walleye Capital LLC | Reduced | $160.6k2.3k shares |
| Walleye Trading LLC | New | $153.6k2.2k shares |
| SIMPLEX TRADING, LLC | Reduced | $55.0k800 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $2.4m34.1k shares |
| Walleye Trading LLC | New | $2.1m30.4k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.0m14.7k shares |
| WOLVERINE TRADING, LLC | New | $852.2k12.0k shares |
| JANE STREET GROUP, LLC | Reduced | $349.2k5.0k shares |
| Walleye Capital LLC | Added | $160.6k2.3k shares |
| SIMPLEX TRADING, LLC | Reduced | $6.0k100 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution filed 2025-10-17 | 12.0% |
| RTW INVESTMENTS, LP 13G · institution +1.1 pts · filed 2026-08-14 | 6.2% |
| PRICE T ROWE ASSOCIATES INC /MD/ 13G · institution new · filed 2026-05-15 | 5.4% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.1% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)
Insider purchases and sales in Q4 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q1 2023 | 0 | — | 2 | $673.5k | — |
| Q2 2023 | 0 | — | 2 | $1.8m | — |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 2 | $451.4k | — |
| Q1 2024 | 0 | — | 0 | — | — |
| Q2 2024 | 0 | — | 11 | $17.4m | — |
| Q3 2024 | 0 | — | 1 | $941.7k | — |
| Q4 2024 | 0 | — | 2 | $4.1m | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-11-25 | Katz David Jeffrey EVP and Chief Legal Officer | Sold | $1.0m12.3k shares |
| 2024-11-19 | Jayanathan Ranjan Chief Information Officer | Sold | $3.1m38.6k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q4 2024
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 9.8m $685.5m | Added +236.0k |
| VANGUARD GROUP INC 0.01% of their portfolio | 7.4m $518.6m | Added +71.9k |
| BECK MACK & OLIVER LLC 3.97% of their portfolio | 3.1m $214.3m | Reduced -129.5k |
| STATE STREET CORP 0.01% of their portfolio | 2.6m $178.1m | Added +104.3k |
| RTW INVESTMENTS, LP 2.09% of their portfolio | 2.0m $138.2m | Added +170.0k |
| Invesco Ltd. 0.02% of their portfolio | 1.7m $120.9m | Added +70.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.6m $108.5m | Reduced -1.6k |
| DIMENSIONAL FUND ADVISORS LP 0.03% of their portfolio | 1.5m $107.0m | Reduced -220.7k |
| Allspring Global Investments Holdings, LLC 0.17% of their portfolio | 1.5m $103.5m | Added +344.1k |
| JB CAPITAL PARTNERS LP 19.80% of their portfolio | 1.5m $102.9m | Reduced -30.0k |
| PRINCIPAL FINANCIAL GROUP INC 0.05% of their portfolio | 1.4m $100.7m | Reduced -65.1k |
| Hood River Capital Management LLC 1.36% of their portfolio | 1.3m $92.4m | Added +39.9k |
| MARSHALL WACE, LLP 0.11% of their portfolio | 1.2m $85.4m | Added +125.8k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 1.1m $75.8m | Added +446.1k |
| Clearbridge Investments, LLC 0.05% of their portfolio | 942.1k $65.8m | Added +207.6k |
| T. Rowe Price Investment Management, Inc. 0.04% of their portfolio | 913.7k $63.8m | Added +404.2k |
| LOOMIS SAYLES & CO L P 0.07% of their portfolio | 834.7k $58.3m | Reduced -24.4k |
| NORGES BANK 0.01% of their portfolio | 807.3k $56.4m | Unchanged |
| NORTHERN TRUST CORP 0.01% of their portfolio | 772.1k $53.9m | Added +109.1k |
| FMR LLC 0.00% of their portfolio | 691.4k $48.3m | Reduced -10.0k |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 2.53% of their portfolio | 664.8k $46.4m | Reduced -12.6k |
| EMERALD ADVISERS, LLC 1.78% of their portfolio | 657.2k $45.9m | Reduced -12.1k |
| Nuveen Asset Management, LLC 0.01% of their portfolio | 640.3k $44.7m | Added +121.0k |
| Rockefeller Capital Management L.P. 0.11% of their portfolio | 624.7k $43.6m | Added +138.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 624.2k $43.6m | Reduced -13.1k |
| MORGAN STANLEY 0.00% of their portfolio | 615.7k $43.0m | Reduced -31.5k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 519.1k $36.3m | Added +26.2k |
| Alyeska Investment Group, L.P. 0.13% of their portfolio | 502.6k $35.1m | Added +261.7k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 496.2k $34.7m | Reduced -16.1k |
| Global Alpha Capital Management Ltd. 2.47% of their portfolio | 487.0k $34.0m | Reduced -473.0k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 473.8k $33.1m | First filing |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.22% of their portfolio | 461.1k $32.2m | Added +3.4k |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 454.3k $31.7m | Added +67.3k |
| Munro Partners 1.08% of their portfolio | 445.0k $31.1m | Added +213.6k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 431.8k $30.2m | Reduced -67.6k |
| EMERALD MUTUAL FUND ADVISERS TRUST 1.82% of their portfolio | 427.6k $29.9m | Reduced -81.0k |
| Portolan Capital Management, LLC 1.99% of their portfolio | 424.3k $29.6m | Reduced -67.0k |
| HARBOR CAPITAL ADVISORS, INC. 1.26% of their portfolio | 415.0k $29.0m | Added +12.8k |
| Tidal Investments LLC 0.22% of their portfolio | 389.3k $27.2m | Added +384.0k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 361.5k $25.2m | Reduced -157.2k |
| Alpha Wave Global, LP 11.54% of their portfolio | 356.9k $24.9m | Reduced -491.5k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 338.8k $23.7m | Added +72.8k |
| BESSEMER GROUP INC 0.04% of their portfolio | 317.3k $22.2m | Reduced -63.9k |
| VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio | 291.0k $20.3m | Reduced -76.7k |
| CI INVESTMENTS INC. 0.07% of their portfolio | 279.5k $19.5m | Added +134.2k |
| AXIOM INVESTORS LLC /DE 0.14% of their portfolio | 279.5k $19.5m | Added +88.4k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 276.6k $19.3m | Reduced -22.8k |
| SEI INVESTMENTS CO 0.02% of their portfolio | 256.9k $17.9m | Added +16.6k |
| Skandinaviska Enskilda Banken AB (publ) 0.08% of their portfolio | 248.6k $17.7m | Unchanged |
| AGF MANAGEMENT LTD 0.08% of their portfolio | 238.0k $16.6m | Added +88.8k |
| Cerity Partners LLC 0.03% of their portfolio | 223.7k $15.5m | Reduced -163.8k |
| PICTON MAHONEY ASSET MANAGEMENT 0.58% of their portfolio | 218.4k $15.3m | Added +36.6k |
| AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio | 209.4k $14.6m | Reduced -206.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 209.2k $14.6m | Reduced -152.2k |
| SEGALL BRYANT & HAMILL, LLC 0.20% of their portfolio | 206.8k $14.4m | Reduced -2.8k |
| WHITTIER TRUST CO 0.19% of their portfolio | 206.8k $14.4m | Added +8.9k |
| NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio | 200.3k $14.0m | Added +6.9k |
| WCM INVESTMENT MANAGEMENT, LLC 0.03% of their portfolio | 198.7k $14.1m | New |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio | 194.2k $13.6m | Reduced -89.2k |
| ROBOTTI ROBERT 2.37% of their portfolio | 193.7k $13.5m | Reduced -86.0k |
| UBS Group AG 0.00% of their portfolio | 188.4k $13.2m | Added +150.9k |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.01% of their portfolio | 181.3k $12.7m | Reduced -80.2k |
| Legal & General Group Plc 0.00% of their portfolio | 181.1k $12.6m | Added +2.0k |
| CITIGROUP INC 0.01% of their portfolio | 178.9k $12.5m | Added +4.1k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 173.9k $12.1m | Reduced -352 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 173.8k $12.1m | Reduced -83.2k |
| Public Sector Pension Investment Board 0.05% of their portfolio | 162.3k $11.3m | Added +24.1k |
| MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio | 151.8k $10.6m | Reduced -708.6k |
| Penserra Capital Management LLC 0.18% of their portfolio | 143.9k $10.0m | Added +76.2k |
| Penn Capital Management Company, LLC 0.91% of their portfolio | 132.3k $9.2m | Reduced -8.9k |
| BARCLAYS PLC 0.00% of their portfolio | 125.6k $8.8m | Added +8.6k |
| Pier Capital, LLC 1.25% of their portfolio | 125.1k $8.7m | Added +3.6k |
| Swiss National Bank 0.01% of their portfolio | 123.6k $8.6m | Added +900 |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 115.6k $8.1m | Reduced -2.2k |
| FIRST TRUST ADVISORS LP 0.01% of their portfolio | 107.7k $7.5m | Added +31.0k |
| WHITTIER TRUST CO OF NEVADA INC 0.18% of their portfolio | 106.3k $7.4m | Added +5.7k |
| CASTLEARK MANAGEMENT LLC 0.25% of their portfolio | 104.5k $7.3m | Reduced -38.8k |
| ROYCE & ASSOCIATES LP 0.07% of their portfolio | 102.0k $7.1m | Reduced -6.0k |
| Global IMC LLC 1.21% of their portfolio | 96.3k $6.7m | Added +59 |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 91.7k $6.4m | Reduced -4.7k |
| KEYBANK NATIONAL ASSOCIATION/OH 0.02% of their portfolio | 88.6k $6.2m | Added +5 |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 87.9k $6.1m | Reduced -121.5k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 85.2k $6.0m | Reduced -19.2k |
| First Eagle Investment Management, LLC 0.01% of their portfolio | 85.0k $5.9m | Reduced -16.5k |
| TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio | 81.1k $5.7m | Added +25.5k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 80.2k $5.6m | Added +18.2k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 74.6k $5.2m | Reduced -1.2k |
| Rathbones Group PLC 0.02% of their portfolio | 72.5k $5.1m | Reduced -28.5k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 71.5k $5.0m | Reduced -37.9k |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 65.9k $5.2m | Reduced -14.7k |
| Informed Momentum Co LLC 0.60% of their portfolio | 61.0k $4.3m | Reduced -1.3k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 59.0k $4.1m | Reduced -616 |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 58.6k $4.1m | Reduced -77.3k |
| FORMULA GROWTH LTD 1.34% of their portfolio | 56.8k $4.0m | Reduced -9.0k |
| Calamos Advisors LLC 0.02% of their portfolio | 55.0k $3.8m | Reduced -56.2k |
| F/m Investments LLC 0.14% of their portfolio | 54.3k $3.8m | New |
| Woodline Partners LP 0.03% of their portfolio | 53.6k $3.7m | Reduced -176.0k |
| Qube Research & Technologies Ltd 0.01% of their portfolio | 53.2k $3.7m | Added +22.4k |
| Thrivent Financial for Lutherans 0.01% of their portfolio | 50.4k $3.5m | Reduced -755 |
| PARADIGM CAPITAL MANAGEMENT INC/NY 0.16% of their portfolio | 49.6k $3.5m | Unchanged |