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 ($1.1m this quarter). Holder counts are more reliable. Shares outstanding: 67.9m as of 2023-11-06, 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 ≈ $28.19. Options: 9 managers hold calls ($4.0m notional), 8 hold puts ($3.0m).
Trends to Q3 2023
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 |
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 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q4 2022 | $1.9m | $1.7m | 0.89 |
| Q1 2023 | $3.5m | $4.8m | 1.36 |
| Q2 2023 | $5.9m | $6.6m | 1.11 |
| Q3 2023 | $4.0m | $3.0m | 0.73 |
Biggest buyers
| BlackRock Inc. | Added | +865.8k |
| LOOMIS SAYLES & CO L P | New | +655.5k |
| WELLINGTON MANAGEMENT GROUP LLP | New | +622.0k |
| Alyeska Investment Group, L.P. | Added | +472.9k |
| EMERALD ADVISERS, LLC | New | +443.5k |
| EMERALD MUTUAL FUND ADVISERS TRUST | New | +380.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Added | +362.6k |
| GOLDMAN SACHS GROUP INC | Added | +219.5k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +187.0k |
| BESSEMER GROUP INC | Added | +184.8k |
Biggest sellers
| Rubric Capital Management LP | Sold out | -516.1k |
| Maven Securities LTD | Sold out | -400.7k |
| Point72 Asset Management, L.P. | Reduced | -362.5k |
| EDMOND DE ROTHSCHILD HOLDING S.A. | Reduced | -329.4k |
| Woodline Partners LP | Reduced | -320.2k |
| INTRINSIC EDGE CAPITAL MANAGEMENT LLC | Sold out | -303.1k |
| Monashee Investment Management LLC | Sold out | -300.0k |
| CITADEL ADVISORS LLC | Sold out | -222.6k |
| TWO SIGMA ADVISERS, LP | Sold out | -205.7k |
| Cerity Partners LLC | Sold out | -172.0k |
Biggest calls
| CITADEL ADVISORS LLC | Added | $1.1m38.8k shares |
| PEAK6 Investments LLC | Added | $687.8k24.4k shares |
| JANE STREET GROUP, LLC | Added | $614.5k21.8k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $603.3k21.4k shares |
| Walleye Capital LLC | New | $496.1k17.6k shares |
| Walleye Trading LLC | Added | $307.3k10.9k shares |
| WOLVERINE TRADING, LLC | New | $200.1k7.1k shares |
| SIMPLEX TRADING, LLC | Reduced | $36.0k1.3k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| MILLENNIUM MANAGEMENT LLC | New | $1.4m50.0k shares |
| CITADEL ADVISORS LLC | Reduced | $648.4k23.0k shares |
| JANE STREET GROUP, LLC | New | $329.8k11.7k shares |
| PEAK6 Investments LLC | New | $225.5k8.0k shares |
| Walleye Trading LLC | Reduced | $188.9k6.7k shares |
| Walleye Capital LLC | Added | $129.7k4.6k shares |
| SIMPLEX TRADING, LLC | Reduced | $19.0k700 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 Q3 2023
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 |
|---|---|---|---|---|---|
| Q4 2021 | 0 | — | 1 | $2.1m | — |
| Q1 2022 | 0 | — | 0 | — | — |
| 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 | — | — |
None reported in Q3 2023.
Holders, Q3 2023
| Manager | Shares | Change |
|---|---|---|
| BlackRock Inc. 0.01% of their portfolio | 8.9m $251.4m | Added +865.8k |
| VANGUARD GROUP INC 0.00% of their portfolio | 4.2m $119.0m | Added +143.3k |
| BECK MACK & OLIVER LLC 2.40% of their portfolio | 3.2m $91.5m | Reduced -13.5k |
| STATE STREET CORP 0.00% of their portfolio | 2.2m $61.8m | Added +181.4k |
| JB CAPITAL PARTNERS LP 14.91% of their portfolio | 2.1m $60.0m | Unchanged |
| EDMOND DE ROTHSCHILD HOLDING S.A. 0.97% of their portfolio | 1.7m $48.3m | Reduced -329.4k |
| Point72 Asset Management, L.P. 0.16% of their portfolio | 1.7m $48.0m | Reduced -362.5k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.7m $47.1m | Added +71.5k |
| Global Alpha Capital Management Ltd. 4.34% of their portfolio | 1.5m $43.2m | Unchanged |
| Invesco Ltd. 0.01% of their portfolio | 1.5m $41.5m | Added +163.4k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 1.3m $35.5m | Added +187.0k |
| PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio | 1.2m $32.6m | Added +163.4k |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 1.89% of their portfolio | 1.0m $29.5m | Added +9.2k |
| Hood River Capital Management LLC 0.89% of their portfolio | 979.5k $27.6m | Added +6.4k |
| MILLENNIUM MANAGEMENT LLC 0.03% of their portfolio | 858.1k $24.2m | Added +38.3k |
| AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio | 747.9k $21.1m | Reduced -144.1k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 744.4k $21.0m | Added +219.5k |
| Alyeska Investment Group, L.P. 0.14% of their portfolio | 722.9k $20.4m | Added +472.9k |
| LOOMIS SAYLES & CO L P 0.03% of their portfolio | 655.5k $18.5m | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 646.6k $18.2m | Added +80.7k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 622.0k $17.5m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 594.3k $16.8m | Added +47.2k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.13% of their portfolio | 585.3k $16.5m | Added +17.2k |
| Woodline Partners LP 0.18% of their portfolio | 550.9k $15.5m | Reduced -320.2k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.03% of their portfolio | 546.1k $15.4m | Added +21.4k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 541.4k $15.3m | Reduced -20.9k |
| Allspring Global Investments Holdings, LLC 0.03% of their portfolio | 517.0k $14.6m | Added +155.8k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 449.3k $12.7m | Added +13.3k |
| EMERALD ADVISERS, LLC 0.61% of their portfolio | 443.5k $12.5m | New |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 395.1k $11.1m | Added +362.6k |
| Penn Capital Management Company, LLC 1.10% of their portfolio | 381.5k $10.8m | Added +10.5k |
| EMERALD MUTUAL FUND ADVISERS TRUST 0.65% of their portfolio | 380.3k $10.7m | New |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 378.9k $10.7m | Added +48.9k |
| ROYCE & ASSOCIATES LP 0.11% of their portfolio | 369.6k $10.4m | Added +16.7k |
| SECTORAL ASSET MANAGEMENT INC 2.03% of their portfolio | 369.1k $10.4m | Reduced -29.5k |
| MORGAN STANLEY 0.00% of their portfolio | 361.2k $10.2m | Reduced -42.7k |
| RENAISSANCE TECHNOLOGIES LLC 0.02% of their portfolio | 344.0k $9.7m | Reduced -93.4k |
| Skandinaviska Enskilda Banken AB (publ) 0.06% of their portfolio | 310.6k $8.8m | Added +102.5k |
| ROBOTTI ROBERT 1.22% of their portfolio | 293.7k $8.3m | Reduced -3.1k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 281.6k $7.9m | Added +2.0k |
| Pier Capital, LLC 1.27% of their portfolio | 279.6k $7.9m | Reduced -102.6k |
| Portolan Capital Management, LLC 0.57% of their portfolio | 216.7k $6.1m | Reduced -86.8k |
| HSBC HOLDINGS PLC 0.01% of their portfolio | 212.8k $6.0m | Added +73.1k |
| BESSEMER GROUP INC 0.01% of their portfolio | 184.8k $5.2m | Added +184.8k |
| NEUBERGER BERMAN GROUP LLC 0.00% of their portfolio | 180.3k $5.1m | New |
| RHUMBLINE ADVISERS 0.01% of their portfolio | 180.2k $5.1m | Added +28.4k |
| Legal & General Group Plc 0.00% of their portfolio | 173.9k $4.9m | Added +8.6k |
| Russell Investments Group, Ltd. 0.01% of their portfolio | 161.2k $4.5m | Added +32.4k |
| PUTNAM INVESTMENTS LLC 0.01% of their portfolio | 160.8k $4.5m | Reduced -13.8k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 153.6k $4.3m | Reduced -14.7k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 147.3k $4.2m | Added +19.9k |
| Advantage Alpha Capital Partners LP 0.84% of their portfolio | 141.6k $4.0m | Reduced -84.1k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 140.9k $4.0m | Added +12.7k |
| FIRST TRUST ADVISORS LP 0.00% of their portfolio | 134.2k $3.8m | Added +7.4k |
| Swiss National Bank 0.00% of their portfolio | 132.5k $3.7m | Added +4.4k |
| Rathbones Group PLC 0.03% of their portfolio | 122.5k $3.5m | New |
| CITIGROUP INC 0.00% of their portfolio | 112.4k $3.2m | Reduced -10.6k |
| PICTON MAHONEY ASSET MANAGEMENT 0.14% of their portfolio | 107.8k $3.0m | New |
| BARCLAYS PLC 0.00% of their portfolio | 100.7k $2.8m | Added +72.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 99.5k $2.8m | Reduced -34.8k |
| MARSHALL WACE, LLP 0.01% of their portfolio | 96.0k $2.7m | New |
| Alberta Investment Management Corp 0.03% of their portfolio | 93.7k $2.6m | Reduced -19.6k |
| KEYBANK NATIONAL ASSOCIATION/OH 0.01% of their portfolio | 88.6k $2.5m | Unchanged |
| Calamos Advisors LLC 0.01% of their portfolio | 87.2k $2.5m | Added +17.3k |
| VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio | 87.2k $2.5m | Added +20.0k |
| Rockefeller Capital Management L.P. 0.01% of their portfolio | 85.9k $2.4m | Added +25.4k |
| RAYMOND JAMES & ASSOCIATES 0.00% of their portfolio | 80.5k $2.3m | Added +53.7k |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 77.8k $2.2m | Added +3.3k |
| State of New Jersey Common Pension Fund D 0.01% of their portfolio | 75.7k $2.1m | New |
| FORMULA GROWTH LTD 0.72% of their portfolio | 75.0k $2.1m | New |
| Public Sector Pension Investment Board 0.02% of their portfolio | 74.6k $2.1m | Reduced -27.3k |
| RAYMOND JAMES TRUST N.A. 0.06% of their portfolio | 71.2k $2.0m | Reduced -97 |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 70.4k $2.0m | Added +9.2k |
| PRUDENTIAL FINANCIAL INC 0.00% of their portfolio | 70.4k $2.0m | Added +335 |
| WHITE PINE CAPITAL LLC 0.79% of their portfolio | 69.7k $2.0m | Reduced -8.9k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 66.4k $1.9m | Reduced -1.8k |
| Federation des caisses Desjardins du Quebec 0.02% of their portfolio | 63.5k $1.8m | Unchanged |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.01% of their portfolio | 62.3k $1.8m | Added +47.1k |
| E. Ohman J:or Asset Management AB 0.07% of their portfolio | 61.7k $1.7m | New |
| CANADA LIFE ASSURANCE Co 0.00% of their portfolio | 60.9k $1.7m | Added +10.1k |
| First Eagle Investment Management, LLC 0.00% of their portfolio | 60.1k $1.7m | Added +17.4k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.02% of their portfolio | 59.2k $1.7m | Added +43.3k |
| Thrivent Financial for Lutherans 0.00% of their portfolio | 55.2k $1.6m | Added +296 |
| TEXAS PERMANENT SCHOOL FUND CORP 0.01% of their portfolio | 51.2k $1.4m | Added +972 |
| PARADIGM CAPITAL MANAGEMENT INC/NY 0.08% of their portfolio | 50.9k $1.4m | Reduced -4.3k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 44.4k $1.3m | Reduced -8.2k |
| CHARTWELL INVESTMENT PARTNERS, LLC 0.05% of their portfolio | 42.1k $1.2m | Unchanged |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.01% of their portfolio | 40.3k $1.1m | Reduced -24.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 38.7k $1.1m | Added +25.3k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 38.6k $1.1m | Reduced -41.9k |
| State of Alaska, Department of Revenue 0.01% of their portfolio | 37.6k $1.1m | Added +3.2k |
| Jump Financial, LLC 0.04% of their portfolio | 37.4k $1.1m | New |
| Lido Advisors, LLC 0.01% of their portfolio | 37.1k $1.0m | Unchanged |
| Illinois Municipal Retirement Fund 0.02% of their portfolio | 35.9k $1.0m | New |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 35.7k $1.0m | Added +14.5k |
| State of Tennessee, Department of Treasury 0.00% of their portfolio | 35.7k $1.0m | Added +5.6k |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.00% of their portfolio | 35.0k $986.6k | Reduced -5.0k |
| AMERICAN INTERNATIONAL GROUP, INC. 0.01% of their portfolio | 32.7k $921.9k | Added +5.7k |
| Ensign Peak Advisors, Inc 0.00% of their portfolio | 32.2k $906.6k | Unchanged |
| Assenagon Asset Management S.A. 0.00% of their portfolio | 31.8k $897.2k | Reduced -12 |