Vault-13

THERMON GROUP HLDGS INC

COM · Common Stock · CUSIP 88362T103

216 institutional holders +23 vs Q4 2025
32,856,00332.9m shares reported held*
$1.7bnreported value*
59 new 56 added 73 reduced 40 sold out net sold ≈ $14.4m (-212.0k shares)

* 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 ($883.0k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $50.28. Options: 3 managers hold calls ($3.4m notional), 2 hold puts ($2.0m).

Trends to Q1 2026

Institutional holders

Managers reporting a position, each quarter

0100200300Q3 22: 120Q4 22: 134Q1 23: 156Q2 23: 154Q3 23: 151Q4 23: 160Q1 24: 147Q2 24: 156Q3 24: 152Q4 24: 170Q1 25: 161Q2 25: 170Q3 25: 158Q4 25: 193Q1 26: 216216Q3 22Q3 23Q3 24Q3 25Q1 26
Numbers
QuarterHolders
Q3 2022120
Q4 2022134
Q1 2023156
Q2 2023154
Q3 2023151
Q4 2023160
Q1 2024147
Q2 2024156
Q3 2024152
Q4 2024170
Q1 2025161
Q2 2025170
Q3 2025158
Q4 2025193
Q1 2026216

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
2000200Q2 24: 75 bought or addedQ2 24: 68 cut or sold outQ3 24: 77 bought or addedQ3 24: 63 cut or sold outQ3 24Q4 24: 85 bought or addedQ4 24: 67 cut or sold outQ1 25: 76 bought or addedQ1 25: 78 cut or sold outQ1 25Q2 25: 94 bought or addedQ2 25: 74 cut or sold outQ3 25: 83 bought or addedQ3 25: 80 cut or sold outQ3 25Q4 25: 104 bought or addedQ4 25: 83 cut or sold outQ1 26: 115 bought or addedQ1 26: 113 cut or sold outQ1 26
Numbers
QuarterBought or addedCut or sold out
Q2 20247568
Q3 20247763
Q4 20248567
Q1 20257678
Q2 20259474
Q3 20258380
Q4 202510483
Q1 2026115113

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$1m$2m$3m$4mQ2 25 calls: $0Q2 25 puts: $0Q2 25P/C —Q3 25 calls: $0Q3 25 puts: $0Q3 25P/C —Q4 25 calls: $1.2mQ4 25 puts: $0Q4 25P/C 0.00Q1 26 calls: $3.4mQ1 26 puts: $2.0mQ1 26P/C 0.58
Numbers
QuarterCallsPutsP/C
Q2 2025$0$0—
Q3 2025$0$0—
Q4 2025$1.2m$00.00
Q1 2026$3.4m$2.0m0.58

Biggest buyers

Magnetar Financial LLC New +757,996+758.0k
CITIGROUP INC Added +566,278+566.3k
FMR LLC Added +552,961+553.0k
ALPINE ASSOCIATES MANAGEMENT INC. New +485,882+485.9k
SOROS FUND MANAGEMENT LLC New +448,088+448.1k
Balyasny Asset Management L.P. Added +435,969+436.0k
AQR Arbitrage LLC New +416,851+416.9k
Qube Research & Technologies Ltd Added +383,336+383.3k
TWO SIGMA INVESTMENTS, LP Added +268,237+268.2k
GOLDMAN SACHS GROUP INC Added +245,977+246.0k

Biggest sellers

MORGAN STANLEY Reduced -1,010,300-1.0m
WELLINGTON MANAGEMENT GROUP LLP Sold out -731,373-731.4k
GW&K Investment Management, LLC Reduced -674,739-674.7k
BROWN ADVISORY INC Reduced -448,814-448.8k
LONE PEAK GLOBAL INVESTORS LLC Sold out -430,230-430.2k
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC Reduced -371,333-371.3k
HEARTLAND ADVISORS INC Sold out -255,533-255.5k
Lightrock Netherlands B.V. Sold out -248,075-248.1k
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC Reduced -239,912-239.9k
Swedbank AB Reduced -224,000-224.0k

Biggest calls

CITADEL ADVISORS LLC Added $2.1m42.1k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP New $1.3m26.0k shares
SIMPLEX TRADING, LLC Reduced $5.0k100 shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $1.4m26.9k shares
CITADEL ADVISORS LLC New $650.2k12.9k 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.

No one currently above 5% in the filings since 19 Dec 2024.

Fell to 5% or below in the last year: GLAZER CAPITAL, LLC (0.0%, 2026-08-13), FMR LLC (0.0%, 2026-08-06), DIMENSIONAL FUND ADVISORS LP (0.0%, 2026-07-14), VANGUARD GROUP INC (0.0%, 2026-03-27)

Holders, Q1 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 FMR LLC 0.01% of their portfolio BOSTON, MA 2,970,7233.0m $149.7m $149.7m 0.01% Added +553.0k +552,961
2 BlackRock, Inc. 0.00% of their portfolio New York, NY 2,588,1492.6m $130.4m $130.4m 0.00% Reduced -93.5k -93,501
3 DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio AUSTIN, TX 1,730,1001.7m $87.2m $87.2m 0.02% Reduced -479 -479
4 VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 1,404,0911.4m $70.8m $70.8m 0.00% First filing
5 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 1,387,0571.4m $69.9m $69.9m 0.00% First filing
6 Medina Value Partners, LLC 10.20% of their portfolio LOS ANGELES, CA 966,319966.3k $48.7m $48.7m 10.20% Reduced -77.2k -77,207
7 GW&K Investment Management, LLC 0.42% of their portfolio BOSTON, MA 952,518952.5k $48.0m $48.0m 0.42% Reduced -674.7k -674,739
8 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 832,516832.5k $42.0m $42.0m 0.00% Added +50.4k +50,439
9 WESTWOOD HOLDINGS GROUP INC 0.29% of their portfolio DALLAS, TX 782,763782.8k $39.5m $39.5m 0.29% Reduced -194.1k -194,058
10 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 772,529772.5k $38.9m $38.9m 0.00% Added +10.7k +10,689
11 Magnetar Financial LLC 0.39% of their portfolio EVANSTON, IL 757,996758.0k $38.2m $38.2m 0.39% New
12 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio BOSTON, MA 679,685679.7k $34.3m $34.3m 0.02% Added +171.3k +171,346
13 WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 0.11% of their portfolio CHICAGO, IL 647,539647.5k $32.6m $32.6m 0.11% Reduced -239.9k -239,912
14 Harvey Partners, LLC 2.65% of their portfolio Tarrytown, NY 646,728646.7k $32.6m $32.6m 2.65% Reduced -125.3k -125,342
15 NEEDHAM INVESTMENT MANAGEMENT LLC 1.63% of their portfolio NEW YORK, NY 632,500632.5k $31.9m $31.9m 1.63% Added +12.5k +12,500
16 CITIGROUP INC 0.02% of their portfolio NEW YORK, NY 577,926577.9k $29.1m $29.1m 0.02% Added +566.3k +566,278
17 AMERIPRISE FINANCIAL INC 0.01% of their portfolio MINNEAPOLIS, MN 569,672569.7k $28.7m $28.7m 0.01% Reduced -103.7k -103,663
18 VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. 0.23% of their portfolio AMSTERDAM, P7 516,471516.5k $26.0m $26.0m 0.23% Reduced -173.2k -173,206
19 Qube Research & Technologies Ltd 0.04% of their portfolio LONDON, X0 508,956509.0k $25.7m $25.7m 0.04% Added +383.3k +383,336
20 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 486,880486.9k $24.5m $24.5m 0.00% Added +246.0k +245,977
21 ALPINE ASSOCIATES MANAGEMENT INC. 1.44% of their portfolio PALM BEACH, FL 485,882485.9k $24.5m $24.5m 1.44% New
22 Swedbank AB 0.02% of their portfolio STOCKHOLM, V7 470,000470.0k $23.7m $23.7m 0.02% Reduced -224.0k -224,000
23 NEW SOUTH CAPITAL MANAGEMENT INC 1.11% of their portfolio MEMPHIS, TN 458,387458.4k $23.1m $23.1m 1.11% Reduced -16.2k -16,212
24 Balyasny Asset Management L.P. 0.04% of their portfolio Chicago, IL 450,549450.5k $22.7m $22.7m 0.04% Added +436.0k +435,969
25 SOROS FUND MANAGEMENT LLC 0.31% of their portfolio NEW YORK, NY 448,088448.1k $22.6m $22.6m 0.31% New
26 Nuveen, LLC 0.01% of their portfolio CHARLOTTE, NC 428,179428.2k $21.6m $21.6m 0.01% Added +207.5k +207,526
27 AQR Arbitrage LLC 0.35% of their portfolio Greenwich, CT 416,851416.9k $21.0m $21.0m 0.35% New
28 KENNEDY CAPITAL MANAGEMENT LLC 0.39% of their portfolio ST LOUIS, MO 368,773368.8k $18.6m $18.6m 0.39% Reduced -15.1k -15,081
29 TWO SIGMA INVESTMENTS, LP 0.01% of their portfolio NEW YORK, NY 356,278356.3k $18.0m $18.0m 0.01% Added +268.2k +268,237
30 Assenagon Asset Management S.A. 0.03% of their portfolio SENNINGERBERG, N4 345,731345.7k $17.4m $17.4m 0.03% Added +90.0k +90,037
31 UBS Group AG 0.00% of their portfolio ZURICH, V8 336,551336.6k $17.0m $17.0m 0.00% Added +31.5k +31,481
32 DEUTSCHE BANK AG\ 0.01% of their portfolio FRANKFURT AM MAIN, 2M 319,662319.7k $16.1m $16.1m 0.01% Added +3.5k +3,525
33 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 313,446313.4k $15.8m $15.8m 0.00% Reduced -81.8k -81,752
34 First Eagle Investment Management, LLC 0.03% of their portfolio NEW YORK, NY 305,373305.4k $15.4m $15.4m 0.03% Reduced -95.1k -95,137
35 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 294,827294.8k $14.9m $14.9m 0.00% Added +21.8k +21,759
36 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 269,314269.3k $13.6m $13.6m 0.00% Reduced -70.4k -70,422
37 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 250,167250.2k $9.3m $9.3m 0.00% Added +216.2k +216,247
38 JANUS HENDERSON GROUP PLC 0.01% of their portfolio LONDON, X0 243,471243.5k $12.3m $12.3m 0.01% Reduced -7.3k -7,342
39 Meros Investment Management, LP 5.27% of their portfolio DALLAS, TX 241,463241.5k $12.2m $12.2m 5.27% Reduced -98.2k -98,212
40 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 234,793234.8k $11.5m $11.5m 0.00% Reduced -102.4k -102,357
41 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 213,453213.5k $10.8m $10.8m 0.00% First filing
42 MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 212,505212.5k $10.7m $10.7m 0.01% Added +192.7k +192,677
43 JANE STREET GROUP, LLC 0.01% of their portfolio NEW YORK, NY 205,581205.6k $10.4m $10.4m 0.01% Added +97.7k +97,674
44 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 195,526195.5k $9.9m $9.9m 0.00% Added +19.0k +19,044
45 SILVERCREST ASSET MANAGEMENT GROUP LLC 0.07% of their portfolio NEW YORK, NY 187,770187.8k $9.5m $9.5m 0.07% New
46 PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO 0.03% of their portfolio COLUMBUS, OH 169,388169.4k $8.5m $8.5m 0.03% Reduced -4.0k -4,046
47 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 165,468165.5k $8.3m $8.3m 0.00% Reduced -1.0m -1,010,300
48 Russell Investments Group, Ltd. 0.01% of their portfolio Seattle, WA 156,754156.8k $7.9m $7.9m 0.01% Reduced -6.1k -6,105
49 OBERWEIS ASSET MANAGEMENT INC/ 0.23% of their portfolio LISLE, IL 154,700154.7k $7.8m $7.8m 0.23% New
50 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 153,491153.5k $7.7m $7.7m 0.00% Reduced -70.6k -70,638
51 RBF Capital, LLC 0.37% of their portfolio RENO, NV 150,000150.0k $7.6m $7.6m 0.37% Reduced -160.0k -160,000
52 LAZARD ASSET MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 147,930147.9k $7.5m $7.5m 0.01% Added +20.5k +20,548
53 Allspring Global Investments Holdings, LLC 0.01% of their portfolio CHARLOTTE, NC 125,825125.8k $6.3m $6.3m 0.01% Added +24.7k +24,693
54 Alberta Investment Management Corp 0.04% of their portfolio EDMONTON, A0 114,567114.6k $5.8m $5.8m 0.04% New
55 Atom Investors LP 0.40% of their portfolio AUSTIN, TX 111,077111.1k $5.6m $5.6m 0.40% Reduced -23.8k -23,772
56 INTRINSIC EDGE CAPITAL MANAGEMENT LLC 1.01% of their portfolio CHICAGO, IL 110,000110.0k $5.5m $5.5m 1.01% Reduced -120.0k -120,000
57 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 109,534109.5k $5.5m $5.5m 0.00% Reduced -5.3k -5,262
58 De Lisle Partners LLP 0.63% of their portfolio POOLE, X0 104,194104.2k $5.3m $5.3m 0.63% New
59 Diamond Hill Capital Management, LLC (Investment Advisor) 0.03% of their portfolio COLUMBUS, OH 100,199100.2k $5.1m $5.1m 0.03% Reduced -19.8k -19,816
60 Hudson Bay Capital Management LP 0.03% of their portfolio STAMFORD, CT 100,000100.0k $5.0m $5.0m 0.03% New
61 HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.01% of their portfolio TORONTO, A6 94,18094.2k $4.7m $4.7m 0.01% Added +25.8k +25,820
62 1060 Capital, LLC 5.49% of their portfolio DENVER, CO 89,62589.6k $4.5m $4.5m 5.49% Reduced -35.4k -35,375
63 AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio KANSAS CITY, MO 78,86378.9k $4.0m $4.0m 0.00% Added +2.6k +2,640
64 Hirtle & Co., LLC 0.13% of their portfolio WEST CONSHOHOCKEN, PA 75,00075.0k $3.8m $3.8m 0.13% New
65 HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC 0.01% of their portfolio Los Angeles, CA 66,21966.2k $3.3m $3.3m 0.01% Reduced -371.3k -371,333
66 Swiss National Bank 0.00% of their portfolio ZURICH, V8 65,20065.2k $3.3m $3.3m 0.00% Unchanged
67 Informed Momentum Co LLC 0.36% of their portfolio SOLANA BEACH, CA 62,32862.3k $3.1m $3.1m 0.36% Reduced -6.3k -6,339
68 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio NEW YORK, NY 58,89458.9k $3.0m $3.0m 0.00% Added +1.5k +1,457
69 Oliver Luxxe Assets LLC 0.44% of their portfolio GLADSTONE, NJ 58,05158.1k $2.9m $2.9m 0.44% Added +28.5k +28,460
70 TUDOR INVESTMENT CORP ET AL 0.02% of their portfolio STAMFORD, CT 57,83357.8k $2.9m $2.9m 0.02% New
71 RICE HALL JAMES & ASSOCIATES, LLC 0.16% of their portfolio San Diego, CA 57,04857.0k $2.9m $2.9m 0.16% Unchanged
72 MARTINGALE ASSET MANAGEMENT L P 0.07% of their portfolio BOSTON, MA 54,70954.7k $2.8m $2.8m 0.07% Added +5.0k +5,012
73 Riverpoint Wealth Management Holdings, LLC 0.56% of their portfolio CHICAGO, IL 52,10852.1k $2.6m $2.6m 0.56% Added +740 +740
74 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 46,95547.0k $2.4m $2.4m 0.00% New
75 Kintayl Capital LP 1.38% of their portfolio NEW YORK, NY 44,38244.4k $2.2m $2.2m 1.38% New
76 SEI INVESTMENTS CO 0.00% of their portfolio OAKS, PA 41,31641.3k $2.1m $2.1m 0.00% Reduced -13.4k -13,379
77 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 40,70140.7k $2.1m $2.1m 0.00% Added +9.5k +9,534
78 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 40,16740.2k $2.0m $2.0m 0.00% Reduced -25.3k -25,278
79 New York Life Investment Management LLC 0.02% of their portfolio New York, NY 39,20539.2k $2.0m $2.0m 0.02% New
80 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 38,82438.8k $2.0m $2.0m 0.00% Reduced -1.2k -1,163
81 PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio DES MOINES, IA 38,32138.3k $1.9m $1.9m 0.00% Added +3.4k +3,435
82 Yakira Capital Management, Inc. 0.56% of their portfolio Westport, CT 38,09638.1k $1.9m $1.9m 0.56% New
83 Polar Asset Management Partners Inc. 0.05% of their portfolio TORONTO, A6 37,98738.0k $1.9m $1.9m 0.05% New
84 STIFEL FINANCIAL CORP 0.00% of their portfolio ST. LOUIS, MO 34,41634.4k $1.7m $1.7m 0.00% New
85 Sagefield Capital LP 0.12% of their portfolio DALLAS, TX 33,86733.9k $1.7m $1.7m 0.12% New
86 WATER ISLAND CAPITAL LLC 0.22% of their portfolio NEW YORK, NY 32,98733.0k $1.7m $1.7m 0.22% New
87 VICTORY CAPITAL MANAGEMENT INC 0.00% of their portfolio San Antonio, TX 32,70032.7k $1.6m $1.6m 0.00% Reduced -7.3k -7,300
88 Versor Investments LP 3.96% of their portfolio New York, NY 32,07432.1k $1.6m $1.6m 3.96% New
89 CREDIT AGRICOLE S A 0.01% of their portfolio Montrouge Cedex, I0 31,00031.0k $1.6m $1.6m 0.01% New
90 Chicago Capital Management, LLC 0.95% of their portfolio CHICAGO, IL 30,06930.1k $1.1m $1.1m 0.95% New
91 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 28,80828.8k $1.5m $1.5m 0.00% Added +10.1k +10,081
92 Legal & General Group Plc 0.00% of their portfolio London, X0 27,35127.4k $1.4m $1.4m 0.00% Reduced -6.3k -6,307
93 RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio ST. PETERSBURG, FL 26,33526.3k $1.3m $1.3m 0.00% Added +148 +148
94 Aquatic Capital Management LLC 0.04% of their portfolio CHICAGO, IL 24,54224.5k $1.2m $1.2m 0.04% Added +24.5k +24,541
95 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 23,17323.2k $1.2m $1.2m 0.00% Reduced -38.7k -38,675
96 Y-Intercept (Hong Kong) Ltd 0.02% of their portfolio HONG KONG, K3 22,83022.8k $1.2m $1.2m 0.02% New
97 Cerity Partners LLC 0.00% of their portfolio NEW YORK, NY 22,68322.7k $1.1m $1.1m 0.00% Reduced -57.2k -57,218
98 VANGUARD ASSET MANAGEMENT, Ltd 0.00% of their portfolio London, EC4N 8AF, X0 22,33622.3k $1.1m $1.1m 0.00% First filing
99 ABC ARBITRAGE SA 0.15% of their portfolio PARIS, I0 21,89521.9k $1.1m $1.1m 0.15% New
100 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 19,70019.7k $992.9k $992.9k 0.00% New