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 ($3.8m this quarter). Holder counts are more reliable. Shares outstanding: 68.5m as of 2024-02-27, 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 ≈ $48.76. Options: 6 managers hold calls ($5.6m notional), 6 hold puts ($8.4m).
Trends to Q1 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 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 67 | 69 |
| Q1 2023 | 67 | 65 |
| Q2 2023 | 112 | 52 |
| Q3 2023 | 115 | 78 |
| Q4 2023 | 104 | 90 |
| Q1 2024 | 168 | 87 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2023 | $5.9m | $6.6m | 1.11 |
| Q3 2023 | $4.0m | $3.0m | 0.73 |
| Q4 2023 | $5.3m | $6.4m | 1.19 |
| Q1 2024 | $5.6m | $8.4m | 1.50 |
Biggest buyers
| RTW INVESTMENTS, LP | Added | +1.0m |
| FMR LLC | Added | +591.5k |
| Clearbridge Investments, LLC | New | +547.0k |
| T. Rowe Price Investment Management, Inc. | New | +520.7k |
| 8 KNOTS MANAGEMENT, LLC | New | +509.2k |
| MORGAN STANLEY | Added | +441.5k |
| BlackRock Inc. | Added | +364.1k |
| VANGUARD GROUP INC | Added | +345.8k |
| MILLENNIUM MANAGEMENT LLC | Added | +344.1k |
| LOOMIS SAYLES & CO L P | Added | +282.5k |
Biggest sellers
| Point72 Asset Management, L.P. | Sold out | -891.1k |
| EDMOND DE ROTHSCHILD HOLDING S.A. | Reduced | -670.6k |
| Alyeska Investment Group, L.P. | Reduced | -392.3k |
| AMERICAN CENTURY COMPANIES INC | Reduced | -302.8k |
| BARCLAYS PLC | Reduced | -141.6k |
| ROYCE & ASSOCIATES LP | Reduced | -134.5k |
| JB CAPITAL PARTNERS LP | Reduced | -120.0k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -110.0k |
| Rathbones Group PLC | Reduced | -86.3k |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. | Reduced | -82.6k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $2.0m41.4k shares |
| CITADEL ADVISORS LLC | Added | $1.5m31.6k shares |
| MILLENNIUM MANAGEMENT LLC | Reduced | $1.2m25.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $544.0k11.2k shares |
| PEAK6 Investments LLC | Reduced | $287.1k5.9k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| MILLENNIUM MANAGEMENT LLC | Added | $4.9m100.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.9m38.8k shares |
| CITADEL ADVISORS LLC | Added | $1.4m29.3k shares |
| SIMPLEX TRADING, LLC | Unchanged | $160.0k3.3k shares |
| GROUP ONE TRADING LLC | New | $38.9k800 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 Q1 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 |
|---|---|---|---|---|---|
| Q2 2022 | 0 | — | 2 | $456.2k | — |
| Q3 2022 | 0 | — | 0 | — | — |
| Q4 2022 | 0 | — | 2 | $156.0k | — |
| 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 | — | — |
None reported in Q1 2024.
Holders, Q1 2024
| Manager | Shares | Change |
|---|---|---|
| BlackRock Inc. 0.01% of their portfolio | 9.3m $450.5m | Added +364.1k |
| VANGUARD GROUP INC 0.00% of their portfolio | 4.6m $223.9m | Added +345.8k |
| BECK MACK & OLIVER LLC 3.31% of their portfolio | 3.4m $163.2m | Added +123.7k |
| STATE STREET CORP 0.01% of their portfolio | 2.3m $113.6m | Added +112.4k |
| JB CAPITAL PARTNERS LP 18.46% of their portfolio | 2.0m $97.7m | Reduced -120.0k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.8m $88.3m | Added +70.1k |
| RTW INVESTMENTS, LP 1.22% of their portfolio | 1.7m $82.7m | Added +1.0m |
| Invesco Ltd. 0.02% of their portfolio | 1.6m $78.1m | Added +43.5k |
| MORGAN STANLEY 0.00% of their portfolio | 1.5m $72.7m | Added +441.5k |
| PRINCIPAL FINANCIAL GROUP INC 0.04% of their portfolio | 1.4m $70.2m | Added +152.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 1.4m $68.8m | Added +86.0k |
| MILLENNIUM MANAGEMENT LLC 0.04% of their portfolio | 1.1m $52.7m | Added +344.1k |
| Hood River Capital Management LLC 1.16% of their portfolio | 1.1m $52.1m | Added +77.2k |
| Global Alpha Capital Management Ltd. 3.69% of their portfolio | 1.0m $49.6m | Added +141.8k |
| LOOMIS SAYLES & CO L P 0.07% of their portfolio | 988.5k $48.1m | Added +282.5k |
| AMERICAN CENTURY COMPANIES INC 0.03% of their portfolio | 905.9k $44.1m | Reduced -302.8k |
| Alpha Wave Global, LP 12.97% of their portfolio | 877.2k $42.7m | Added +268.4k |
| EDMOND DE ROTHSCHILD HOLDING S.A. 0.71% of their portfolio | 877.1k $42.7m | Reduced -670.6k |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 2.37% of their portfolio | 856.7k $41.7m | Reduced -82.6k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 815.9k $39.7m | Added +44.2k |
| Alyeska Investment Group, L.P. 0.24% of their portfolio | 779.2k $37.9m | Reduced -392.3k |
| WELLINGTON MANAGEMENT GROUP LLP 0.01% of their portfolio | 727.6k $35.4m | Added +390 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.07% of their portfolio | 723.0k $35.2m | Added +163.6k |
| EMERALD ADVISERS, LLC 1.31% of their portfolio | 671.0k $32.6m | Added +122.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 637.5k $31.0m | Added +31.2k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 630.2k $30.7m | Reduced -2.4k |
| FMR LLC 0.00% of their portfolio | 595.9k $29.0m | Added +591.5k |
| Clearbridge Investments, LLC 0.02% of their portfolio | 547.0k $26.6m | New |
| EMERALD MUTUAL FUND ADVISERS TRUST 1.34% of their portfolio | 528.5k $25.7m | Added +83.6k |
| T. Rowe Price Investment Management, Inc. 0.02% of their portfolio | 520.7k $25.3m | New |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 520.6k $25.3m | Reduced -53.1k |
| 8 KNOTS MANAGEMENT, LLC 2.90% of their portfolio | 509.2k $30.0m | New |
| Allspring Global Investments Holdings, LLC 0.04% of their portfolio | 496.6k $24.2m | Added +78.9k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 443.0k $21.6m | Reduced -5.4k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio | 432.1k $21.0m | Added +13.2k |
| Skandinaviska Enskilda Banken AB (publ) 0.10% of their portfolio | 432.0k $21.0m | Reduced -4.0k |
| VICTORY CAPITAL MANAGEMENT INC 0.02% of their portfolio | 420.9k $20.5m | Added +164.8k |
| Cerity Partners LLC 0.05% of their portfolio | 399.4k $19.4m | Added +230.5k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.13% of their portfolio | 392.1k $19.1m | Reduced -7.9k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 383.1k $18.6m | Added +16.3k |
| Penn Capital Management Company, LLC 1.54% of their portfolio | 356.4k $17.4m | Reduced -2.9k |
| NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio | 340.6k $16.6m | Added +170.8k |
| Rockefeller Capital Management L.P. 0.05% of their portfolio | 318.0k $15.5m | Added +155.4k |
| HSBC HOLDINGS PLC 0.01% of their portfolio | 312.8k $15.2m | Added +70.7k |
| ROBOTTI ROBERT 1.92% of their portfolio | 291.1k $14.2m | Added +1.1k |
| Pier Capital, LLC 1.91% of their portfolio | 285.5k $13.9m | Added +9.9k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.02% of their portfolio | 266.0k $12.9m | Added +186 |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 258.0k $12.6m | Added +106.8k |
| BESSEMER GROUP INC 0.02% of their portfolio | 250.3k $12.2m | Added +18.4k |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 249.9k $12.2m | Added +127.0k |
| Avidity Partners Management LP 0.41% of their portfolio | 238.0k $11.6m | New |
| ROYCE & ASSOCIATES LP 0.09% of their portfolio | 217.7k $10.6m | Reduced -134.5k |
| PICTON MAHONEY ASSET MANAGEMENT 0.43% of their portfolio | 210.9k $10.3m | Added +103.0k |
| Woodline Partners LP 0.09% of their portfolio | 197.7k $9.6m | New |
| EAGLE ASSET MANAGEMENT INC 0.05% of their portfolio | 192.0k $9.2m | New |
| Legal & General Group Plc 0.00% of their portfolio | 181.9k $8.8m | Added +8.1k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 173.8k $8.5m | Added +31.0k |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 173.7k $8.5m | Added +5.2k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 172.1k $8.4m | Reduced -44.7k |
| CITIGROUP INC 0.01% of their portfolio | 158.9k $7.7m | Added +22.2k |
| CASTLEARK MANAGEMENT LLC 0.30% of their portfolio | 149.7k $7.3m | New |
| Public Sector Pension Investment Board 0.05% of their portfolio | 133.9k $6.5m | Added +8.5k |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 133.2k $6.5m | Added +128.4k |
| Calamos Advisors LLC 0.03% of their portfolio | 130.9k $6.4m | Added +71.1k |
| MARSHALL WACE, LLP 0.01% of their portfolio | 116.1k $5.7m | Added +109.1k |
| GUGGENHEIM CAPITAL LLC 0.04% of their portfolio | 115.6k $5.6m | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 115.3k $5.6m | Added +44.8k |
| Swiss National Bank 0.00% of their portfolio | 113.9k $5.5m | Reduced -6.3k |
| Rathbones Group PLC 0.03% of their portfolio | 107.8k $5.2m | Reduced -86.3k |
| AYAL Capital Advisors Ltd 3.67% of their portfolio | 105.0k $5.1m | New |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 100.7k $4.9m | Added +91.4k |
| Monashee Investment Management LLC 0.58% of their portfolio | 100.0k $4.9m | New |
| First Eagle Investment Management, LLC 0.01% of their portfolio | 97.4k $4.7m | Added +22.4k |
| Global IMC LLC 1.08% of their portfolio | 95.7k $4.7m | Reduced -7 |
| Knights of Columbus Asset Advisors LLC 0.33% of their portfolio | 95.0k $4.6m | New |
| Portolan Capital Management, LLC 0.35% of their portfolio | 94.0k $4.6m | Reduced -48.5k |
| RAYMOND JAMES & ASSOCIATES 0.00% of their portfolio | 93.2k $4.5m | Added +17.3k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 91.1k $4.4m | Added +22.5k |
| ENVESTNET ASSET MANAGEMENT INC 0.00% of their portfolio | 89.9k $4.4m | Added +34.2k |
| KEYBANK NATIONAL ASSOCIATION/OH 0.02% of their portfolio | 88.6k $4.3m | Unchanged |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 84.5k $4.1m | Reduced -1.9k |
| FORMULA GROWTH LTD 1.31% of their portfolio | 84.5k $4.1m | Reduced -35 |
| PRUDENTIAL FINANCIAL INC 0.01% of their portfolio | 80.0k $3.9m | Added +10.7k |
| Advantage Alpha Capital Partners LP 0.72% of their portfolio | 78.3k $3.8m | Reduced -25.5k |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main 0.00% of their portfolio | 77.9k $3.8m | New |
| State of New Jersey Common Pension Fund D 0.01% of their portfolio | 72.0k $3.5m | Reduced -3.6k |
| Informed Momentum Co LLC 0.54% of their portfolio | 71.6k $3.5m | Reduced -22.8k |
| CANADA LIFE ASSURANCE Co 0.01% of their portfolio | 66.3k $3.2m | Added +6.3k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 65.9k $3.2m | Added +10.4k |
| ExodusPoint Capital Management, LP 0.04% of their portfolio | 65.7k $3.2m | New |
| NewGen Asset Management Ltd 1.70% of their portfolio | 65.0k $3.2m | New |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 64.0k $3.1m | Added +33.3k |
| NWAM LLC 0.27% of their portfolio | 63.4k $3.3m | New |
| Alberta Investment Management Corp 0.03% of their portfolio | 59.6k $2.9m | Reduced -19.1k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.03% of their portfolio | 58.7k $2.9m | Reduced -2.7k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 58.0k $2.8m | Reduced -6.7k |
| TEXAS PERMANENT SCHOOL FUND CORP 0.02% of their portfolio | 57.1k $2.8m | Added +4.9k |
| Thrivent Financial for Lutherans 0.01% of their portfolio | 56.6k $2.8m | Added +2.7k |
| MACQUARIE GROUP LTD 0.00% of their portfolio | 54.7k $2.7m | New |
| E. Ohman J:or Asset Management AB 0.07% of their portfolio | 54.0k $2.6m | Reduced -4.7k |