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Thermon Group Holdings, Inc. (THR) institutional ownership

Market cap$2.0B SectorIndustrials
Funds holding · Q1 2026
226
reported THR position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
113 buyers · 113 sellers

Thermon Group Holdings, Inc. (THR) price and institutional activity

Dates

Q1 2026

$0 bought by 113 investors
Magnetar Financial LLCCitigroup Inc +111 more
$0 sold by 113 investors
Morgan StanleyWellington Management Group LLP +111 more
Bought Sold Totals per quarter; hover a bar for the names.

Thermon Group Holdings, Inc. (THR) institutional activity · 226

Investor Type Est. change Change Δ Own Date
Morgan Stanley · Reduced
Change −1.0M Date Q1 2026
Morgan Stanley Reduced· Q1 2026 −1.0M Q1 2026
Magnetar Financial LLC · New
Change +758K Date Q1 2026
Magnetar Financial LLC New· Q1 2026 +758K Q1 2026
Wellington Management Group LLP · Exited
Change −731K Δ Own −100.0% Date Q1 2026
Wellington Management Group LLP Exited· Q1 2026 −731K −100.0% Q1 2026
Gw&k Investment Management, LLC · Reduced
Change −675K Date Q1 2026
Gw&k Investment Management, LLC Reduced· Q1 2026 −675K Q1 2026
Citigroup Inc · Added
Change +566K Date Q1 2026
Citigroup Inc Added· Q1 2026 +566K Q1 2026
FMR LLC · Added
Change +553K Δ Own +22.9% Date Q1 2026
FMR LLC Added· Q1 2026 +553K +22.9% Q1 2026
Alpine Associates Management Inc. · New
Change +486K Date Q1 2026
Alpine Associates Management Inc. New· Q1 2026 +486K Q1 2026
Brown Advisory Inc · Reduced
Change −449K Date Q1 2026
Brown Advisory Inc Reduced· Q1 2026 −449K Q1 2026
Soros Fund Management LLC · New
Change +448K Date Q1 2026
Soros Fund Management LLC New· Q1 2026 +448K Q1 2026
Balyasny Asset Management L.P. · Added
Change +436K Date Q1 2026
Balyasny Asset Management L.P. Added· Q1 2026 +436K Q1 2026
Lone Peak Global Investors LLC · Exited
Change −430K Δ Own −100.0% Date Q1 2026
Lone Peak Global Investors LLC Exited· Q1 2026 −430K −100.0% Q1 2026
AQR Arbitrage LLC · New
Change +417K Date Q1 2026
AQR Arbitrage LLC New· Q1 2026 +417K Q1 2026
Qube Research & Technologies Ltd · Added
Change +383K Date Q1 2026
Qube Research & Technologies Ltd Added· Q1 2026 +383K Q1 2026
Hotchkis & Wiley Capital Management LLC · Reduced
Change −371K Date Q1 2026
Hotchkis & Wiley Capital Management LLC Reduced· Q1 2026 −371K Q1 2026
Two Sigma Investments, LP · Added
Change +268K Δ Own +304.7% Date Q1 2026
Two Sigma Investments, LP Added· Q1 2026 +268K +304.7% Q1 2026
Data through Q1 2026 · filed Jun 3, 2026
15 of 226

Famous investor activity in Thermon Group Holdings, Inc. (THR)

Thermon Group Holdings, Inc. (THR) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Thames Bruce · Director 2 operations -501K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Thames Bruce Director 2 operations -501K 0 Jun 1, 2026 Jun 3, 2026
Thames Bruce · Director Grant (A) 78K
Owned 469K Trade date Jun 1, 2026 Filed date Jun 3, 2026
Thames Bruce Director Grant (A) 78K 469K Jun 1, 2026 Jun 3, 2026
Ryan Tarkington · Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -69K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Ryan Tarkington Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -69K 0 Jun 1, 2026 Jun 3, 2026
Ryan Tarkington · Officer Grant (A) 15K
Owned 69K Trade date Jun 1, 2026 Filed date Jun 3, 2026
Ryan Tarkington Officer Grant (A) 15K 69K Jun 1, 2026 Jun 3, 2026
Strzelecki Angela · Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -14K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Strzelecki Angela Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -14K 0 Jun 1, 2026 Jun 3, 2026
Schott Jan L. · Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -36K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Schott Jan L. Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -36K 0 Jun 1, 2026 Jun 3, 2026
Schott Jan L. · Officer Grant (A) 14K
Owned 36K Trade date Jun 1, 2026 Filed date Jun 3, 2026
Schott Jan L. Officer Grant (A) 14K 36K Jun 1, 2026 Jun 3, 2026
Richey Victor L. Jr · Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -8K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Richey Victor L. Jr Director Shares transferred outside the market (D), often for tax or as a gift, not a market sale -8K 0 Jun 1, 2026 Jun 3, 2026
Lucas Thomas Gregory · Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -19K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Lucas Thomas Gregory Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -19K 0 Jun 1, 2026 Jun 3, 2026
Lucas Thomas Gregory · Officer Grant (A) 7K
Owned 19K Trade date Jun 1, 2026 Filed date Jun 3, 2026
Lucas Thomas Gregory Officer Grant (A) 7K 19K Jun 1, 2026 Jun 3, 2026
Roberto Kuahara · Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -60K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Roberto Kuahara Officer Shares transferred outside the market (D), often for tax or as a gift, not a market sale -60K 0 Jun 1, 2026 Jun 3, 2026
Roberto Kuahara · Officer Grant (A) 16K
Owned 60K Trade date Jun 1, 2026 Filed date Jun 3, 2026
Roberto Kuahara Officer Grant (A) 16K 60K Jun 1, 2026 Jun 3, 2026
Harris-Peterson Candace · Officer 2 operations -55K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
Harris-Peterson Candace Officer 2 operations -55K 0 Jun 1, 2026 Jun 3, 2026
Harris-Peterson Candace · Officer Grant (A) 14K
Owned 52K Trade date Jun 1, 2026 Filed date Jun 3, 2026
Harris-Peterson Candace Officer Grant (A) 14K 52K Jun 1, 2026 Jun 3, 2026
George Marcus J. · Director 2 operations -53K
Owned 0 Trade date Jun 1, 2026 Filed date Jun 3, 2026
George Marcus J. Director 2 operations -53K 0 Jun 1, 2026 Jun 3, 2026
15 of 58
15 of 58 Sign in to continue to older insider transactions.

Thermon Group Holdings, Inc. (THR) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
T. Rowe Price Investment Management, Inc. 4.3M
% of shares outstanding 12.6% Filing date Nov 14, 2024
T. Rowe Price Investment Management, Inc. 4.3M 12.6% Nov 14, 2024
Vanguard Group Inc 3.4M
% of shares outstanding 10.0% Filing date Dec 6, 2024
Vanguard Group Inc 3.4M 10.0% Dec 6, 2024
FMR LLC 3.0M
% of shares outstanding 9.0% Filing date May 6, 2026
FMR LLC 3.0M 9.0% May 6, 2026
BlackRock Inc. 2.8M
% of shares outstanding 8.2% Filing date Jan 25, 2024
BlackRock Inc. 2.8M 8.2% Jan 25, 2024
Van Lanschot Kempen Investment Management N.V. 2.2M
% of shares outstanding 6.7% Filing date Feb 12, 2024
Van Lanschot Kempen Investment Management N.V. 2.2M 6.7% Feb 12, 2024
Glazer Capital, LLC 1.7M
% of shares outstanding 5.2% Filing date May 27, 2026
Glazer Capital, LLC 1.7M 5.2% May 27, 2026
Wellington Management Group LLP 1.5M
% of shares outstanding 4.5% Filing date Feb 8, 2024
Wellington Management Group LLP 1.5M 4.5% Feb 8, 2024
Harvey Partners, LLC 1.5M
% of shares outstanding 4.4% Filing date Feb 14, 2024
Harvey Partners, LLC 1.5M 4.4% Feb 14, 2024
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Thermon Group Holdings, Inc. (THR) ownership FAQ

Who owns THR?

226 reporting institutions disclosed THR position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.