Vault-13

RADNET INC RDNT

COM · Common Stock · CUSIP 750491102 · ISIN US7504911022

154 institutional holders
39,227,92739.2m shares reported held*
68.4% of all shares outstanding*
$798.4mreported value*

* 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 ($233.0k this quarter). Holder counts are more reliable. Shares outstanding: 57.4m as of 2022-11-04, 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 ≈ $20.35. Options: 5 managers hold calls ($2.2m notional), 5 hold puts ($2.8m).

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP — $1.3m64.9k shares
JANE STREET GROUP, LLC — $362.0k17.8k shares
CITADEL ADVISORS LLC — $289.0k14.2k shares
SIMPLEX TRADING, LLC — $195.0k9.6k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. — $00 shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP — $1.6m78.6k shares
CITADEL ADVISORS LLC — $596.0k29.3k shares
JANE STREET GROUP, LLC — $433.0k21.3k shares
SIMPLEX TRADING, LLC — $193.0k9.5k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. — $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.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution filed 2025-10-17 12.0% 9.3m≈ $570.5m 2025-10-17
RTW INVESTMENTS, LP 13G · institution +1.1 pts · filed 2026-08-14 6.2% +1.1 pts 4.8m≈ $298.9m 2026-08-14
PRICE T ROWE ASSOCIATES INC /MD/ 13G · institution new · filed 2026-05-15 5.4% new 4.2m≈ $256.2m 2026-05-15
VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 5.1% new 4.0m≈ $243.7m 2026-04-29

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 2022

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)

BuyingSelling
202Q4 20: 0 buyingQ4 20: 0 sellingQ1 21: 0 buyingQ1 21: 0 sellingQ1 21Q2 21: 0 buyingQ2 21: 0 sellingQ3 21: 0 buyingQ3 21: 0 sellingQ3 21Q4 21: 0 buyingQ4 21: 1 sellingQ1 22: 0 buyingQ1 22: 0 sellingQ1 22Q2 22: 0 buyingQ2 22: 2 sellingQ3 22: 0 buyingQ3 22: 0 sellingQ3 22
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20200—0——
Q1 20210—0——
Q2 20210—0——
Q3 20210—0——
Q4 20210—1$2.1m—
Q1 20220—0——
Q2 20220—2$456.2k—
Q3 20220—0——

None reported in Q3 2022.

Holders, Q3 2022

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BlackRock Inc. 0.00% of their portfolio New York, NY 6,632,6966.6m $135.0m $135.0m 0.00% —
2 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 3,305,4353.3m $67.3m $67.3m 0.00% —
3 BECK MACK & OLIVER LLC 1.99% of their portfolio NEW YORK, NY 3,022,3413.0m $61.5m $61.5m 1.99% —
4 EDMOND DE ROTHSCHILD HOLDING S.A. 1.16% of their portfolio CHAMBESY, V8 2,169,3902.2m $44.1m $44.1m 1.16% —
5 JB CAPITAL PARTNERS LP 12.55% of their portfolio Armonk, NY 2,093,7112.1m $42.6m $42.6m 12.55% —
6 Point72 Asset Management, L.P. 0.16% of their portfolio STAMFORD, CT 1,811,9741.8m $36.9m $36.9m 0.16% —
7 Global Alpha Capital Management Ltd. 3.45% of their portfolio MONTREAL, A8 1,694,2241.7m $34.5m $34.5m 3.45% —
8 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,586,2531.6m $32.3m $32.3m 0.00% —
9 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 1,499,4421.5m $30.5m $30.5m 0.01% —
10 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 975,227975.2k $19.8m $19.8m 0.01% —
11 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 898,519898.5k $18.3m $18.3m 0.00% —
12 PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. 1.25% of their portfolio EDINA, MN 883,320883.3k $18.0m $18.0m 1.25% —
13 Assenagon Asset Management S.A. 0.07% of their portfolio SENNINGERBERG, N4 827,809827.8k $16.8m $16.8m 0.07% —
14 SILVERCREST ASSET MANAGEMENT GROUP LLC 0.12% of their portfolio NEW YORK, NY 735,167735.2k $15.0m $15.0m 0.12% —
15 AMERICAN CENTURY COMPANIES INC 0.01% of their portfolio KANSAS CITY, MO 665,701665.7k $13.5m $13.5m 0.01% —
16 RENAISSANCE TECHNOLOGIES LLC 0.02% of their portfolio NEW YORK, NY 653,070653.1k $13.3m $13.3m 0.02% —
17 Advantage Alpha Capital Partners LP 1.96% of their portfolio SAN FRANCISCO, CA 524,707524.7k $10.7m $10.7m 1.96% —
18 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 514,307514.3k $10.5m $10.5m 0.00% —
19 DEUTSCHE BANK AG\ 0.01% of their portfolio FRANKFURT AM MAIN, 2M 471,694471.7k $9.6m $9.6m 0.01% —
20 ROYCE & ASSOCIATES LP 0.11% of their portfolio New York, NY 458,905458.9k $9.3m $9.3m 0.11% —
21 Pier Capital, LLC 1.56% of their portfolio STAMFORD, CT 446,889446.9k $9.1m $9.1m 1.56% —
22 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 445,733445.7k $9.1m $9.1m 0.00% —
23 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 419,121419.1k $8.5m $8.5m 0.00% —
24 Voce Capital Management LLC 4.80% of their portfolio San Francisco, CA 363,315363.3k $7.4m $7.4m 4.80% —
25 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 328,054328.1k $6.7m $6.7m 0.00% —
26 PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio DES MOINES, IA 315,658315.7k $6.4m $6.4m 0.01% —
27 ROBOTTI ROBERT 1.51% of their portfolio NEW YORK, NY 312,315312.3k $6.4m $6.4m 1.51% —
28 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 292,934292.9k $6.0m $6.0m 0.00% —
29 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 254,234254.2k $5.2m $5.2m 0.00% —
30 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 252,157252.2k $5.1m $5.1m 0.00% —
31 Woodline Partners LP 0.07% of their portfolio San Francisco, CA 232,161232.2k $4.7m $4.7m 0.07% —
32 PUTNAM INVESTMENTS LLC 0.01% of their portfolio BOSTON, MA 181,562181.6k $3.7m $3.7m 0.01% —
33 Rockefeller Capital Management L.P. 0.02% of their portfolio NEW YORK, NY 181,517181.5k $3.7m $3.7m 0.02% —
34 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 171,263171.3k $3.5m $3.5m 0.00% —
35 Cheyne Capital Management (UK) LLP 6.25% of their portfolio LONDON, X0 143,598143.6k $2.9m $2.9m 6.25% —
36 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 132,119132.1k $2.7m $2.7m 0.00% —
37 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 130,958131.0k $2.7m $2.7m 0.00% —
38 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 124,313124.3k $2.5m $2.5m 0.00% —
39 Swiss National Bank 0.00% of their portfolio ZURICH, V8 120,000120.0k $2.4m $2.4m 0.00% —
40 Legal & General Group Plc 0.00% of their portfolio London, X0 116,179116.2k $2.4m $2.4m 0.00% —
41 TWO SIGMA ADVISERS, LP 0.01% of their portfolio NEW YORK, NY 110,600110.6k $2.3m $2.3m 0.01% —
42 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 108,040108.0k $2.2m $2.2m 0.00% —
43 First Eagle Investment Management, LLC 0.01% of their portfolio NEW YORK, NY 103,148103.1k $2.1m $2.1m 0.01% —
44 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 102,257102.3k $2.1m $2.1m 0.00% —
45 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 100,709100.7k $2.0m $2.0m 0.00% —
46 RAYMOND JAMES TRUST N.A. 0.07% of their portfolio ST. PETERSBURG, FL 93,55393.6k $1.9m $1.9m 0.07% —
47 Public Sector Pension Investment Board 0.02% of their portfolio MONTREAL, A8 89,29389.3k $1.8m $1.8m 0.02% —
48 KEYBANK NATIONAL ASSOCIATION/OH 0.01% of their portfolio BROOKLYN, OH 88,57588.6k $1.8m $1.8m 0.01% —
49 Alberta Investment Management Corp 0.01% of their portfolio EDMONTON, A0 72,90272.9k $1.5m $1.5m 0.01% —
50 Federation des caisses Desjardins du Quebec 0.02% of their portfolio LEVIS, A8 71,52471.5k $1.5m $1.5m 0.02% —
51 WHITE PINE CAPITAL LLC 0.59% of their portfolio BLOOMINGTON, MN 70,13870.1k $1.4m $1.4m 0.59% —
52 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 65,39665.4k $1.3m $1.3m 0.00% —
53 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 63,25163.3k $1.3m $1.3m 0.00% —
54 FIRST TRUST ADVISORS LP 0.00% of their portfolio Wheaton, IL 60,97461.0k $1.2m $1.2m 0.00% —
55 Tamarack Advisers, LP 0.72% of their portfolio CARLSBAD, CA 60,00060.0k $1.2m $1.2m 0.72% —
56 CANADA LIFE ASSURANCE Co 0.00% of their portfolio WINNIPEG, A2 58,64058.6k $1.2m $1.2m 0.00% —
57 PARADIGM CAPITAL MANAGEMENT INC/NY 0.08% of their portfolio ALBANY, NY 55,20055.2k $1.1m $1.1m 0.08% —
58 OBERWEIS ASSET MANAGEMENT INC/ 0.25% of their portfolio LISLE, IL 51,90051.9k $1.1m $1.1m 0.25% —
59 Thrivent Financial for Lutherans 0.00% of their portfolio Minneapolis, MN 50,35650.4k $1.0m $1.0m 0.00% —
60 PRUDENTIAL FINANCIAL INC 0.00% of their portfolio NEWARK, NJ 49,33949.3k $962.0k $962.0k 0.00% —
61 D. E. Shaw & Co., Inc. 0.00% of their portfolio New York, NY 49,31749.3k $1.0m $1.0m 0.00% —
62 Candriam S.C.A. 0.01% of their portfolio STRASSEN, N4 47,86447.9k $974.0k $974.0k 0.01% —
63 COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.01% of their portfolio HARRISBURG, PA 44,38444.4k $903.0k $903.0k 0.01% —
64 CREDIT SUISSE AG/ 0.00% of their portfolio ZURICH, V8 43,44043.4k $884.0k $884.0k 0.00% —
65 TUDOR INVESTMENT CORP ET AL 0.02% of their portfolio STAMFORD, CT 42,81342.8k $871.0k $871.0k 0.02% —
66 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 41,16541.2k $837.7k $837.7k 0.00% —
67 YOUSIF CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BLOOMFIELD HILLS, MI 40,77440.8k $830.0k $830.0k 0.01% —
68 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 37,23837.2k $758.0k $758.0k 0.00% —
69 Lido Advisors, LLC 0.02% of their portfolio Los Angeles, CA 37,12937.1k $755.0k $755.0k 0.02% —
70 COMERICA BANK 0.01% of their portfolio DALLAS, TX 37,09437.1k $703.0k $703.0k 0.01% —
71 TEXAS PERMANENT SCHOOL FUND CORP 0.01% of their portfolio AUSTIN, TX 34,91934.9k $711.0k $711.0k 0.01% —
72 PRELUDE CAPITAL MANAGEMENT, LLC 0.04% of their portfolio NEW YORK, NY 34,62734.6k $705.0k $705.0k 0.04% —
73 State of Alaska, Department of Revenue 0.01% of their portfolio JUNEAU, AK 33,72633.7k $686.0k $686.0k 0.01% —
74 State of Tennessee, Department of Treasury 0.00% of their portfolio NASHVILLE, TN 33,40633.4k $680.0k $680.0k 0.00% —
75 Composition Wealth, LLC 0.03% of their portfolio LOS ANGELES, CA 31,54631.5k $642.0k $642.0k 0.03% —
76 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 29,21329.2k $595.0k $595.0k 0.00% —
77 Belpointe Asset Management LLC 0.04% of their portfolio RENO, NV 27,26527.3k $555.0k $555.0k 0.04% —
78 AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio New York, NY 27,25627.3k $555.0k $555.0k 0.00% —
79 PANAGORA ASSET MANAGEMENT INC 0.00% of their portfolio BOSTON, MA 27,00727.0k $550.0k $550.0k 0.00% —
80 TimesSquare Capital Management, LLC 0.01% of their portfolio NEW YORK, NY 25,90025.9k $527.0k $527.0k 0.01% —
81 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 25,55425.6k $520.0k $520.0k 0.00% —
82 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 24,58524.6k $499.0k $499.0k 0.00% —
83 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 23,90423.9k $486.0k $486.0k 0.00% —
84 AMALGAMATED BANK 0.00% of their portfolio NEW YORK, NY 23,80723.8k $484.0k $484.0k 0.00% —
85 Louisiana State Employees Retirement System 0.01% of their portfolio BATON ROUGE, LA 23,30023.3k $474.0k $474.0k 0.01% —
86 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 23,27423.3k $474.0k $474.0k 0.00% —
87 Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio SEOUL, M5 20,92820.9k $426.0k $426.0k 0.00% —
88 SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.01% of their portfolio BALA CYNWYD, PA 20,68320.7k $421.0k $421.0k 0.01% —
89 Ensign Peak Advisors, Inc 0.00% of their portfolio SALT LAKE CITY, UT 20,21020.2k $411.0k $411.0k 0.00% —
90 SteelPeak Wealth, LLC 0.03% of their portfolio WOODLAND HILLS, CA 20,00020.0k $407.0k $407.0k 0.03% —
91 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 19,57919.6k $398.4k $398.4k 0.00% —
92 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 19,24219.2k $391.6k $391.6k 0.00% —
93 NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio ALBANY, NY 18,05518.1k $367.0k $367.0k 0.00% —
94 RAYMOND JAMES & ASSOCIATES 0.00% of their portfolio ST PETERSBURG, FL 17,04117.0k $347.0k $347.0k 0.00% —
95 OREGON PUBLIC EMPLOYEES RETIREMENT FUND 0.00% of their portfolio TIGARD, OR 16,17116.2k $329.0k $329.0k 0.00% —
96 Raymond James Financial Services Advisors, Inc. 0.00% of their portfolio ST. PETERSBURG, FL 16,08616.1k $327.0k $327.0k 0.00% —
97 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 15,86615.9k $322.9k $322.9k 0.00% —
98 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 15,75015.8k $320.0k $320.0k 0.00% —
99 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 15,42615.4k $314.0k $314.0k 0.00% —
100 Alpha Cubed Investments, LLC 0.02% of their portfolio COSTA MESA, CA 15,05015.1k $306.0k $306.0k 0.02% —