Thermon Group Holdings, Inc.
Thermon Group Holdings, Inc. (THR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · THR · as of Sep 30, 2025
Ownership Breakdown
157
Institutional Holders
▼ 11 vs Q2
$885.25M
Total Inst. Value
▼ $19.97M vs Q2
32.94M
Shares Outstanding
freeFloat 92.30%
33.18M
13F Shares Held
▲ 902,580 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
THR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC electrical industrial apparatus | 3.17M | 9.56% | 9.56% | $84.67B | Nov 7, 2025 | ▼ 53.0K |
BLACKROCK, INC. electrical industrial apparatus | 2.54M | 7.65% | 7.65% | $67.75B | Nov 12, 2025 | ▼ 91.2K |
FMR LLC electrical industrial apparatus | 2.42M | 7.31% | 7.31% | $64.76B | Nov 13, 2025 | ▲ 1.2K |
DIMENSIONAL FUND ADVISORS LP electrical industrial apparatus | 1.77M | 5.34% | 5.34% | $47.27B | Nov 12, 2025 | ▲ 74 |
WESTWOOD HOLDINGS GROUP INC electrical industrial apparatus | 1.49M | 4.49% | 4.49% | $39.74B | Nov 14, 2025 | ▲ 169.9K |
GW&K INVESTMENT MANAGEMENT, LLC electrical industrial apparatus | 1.43M | 4.31% | 4.31% | $38.20B | Nov 12, 2025 | ▲ 817.1K |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. electrical industrial apparatus | 1.17M | 3.53% | 3.53% | $31.25B | Nov 14, 2025 | ▼ 990.9K |
VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V. electrical industrial apparatus | 1.13M | 3.40% | 3.40% | $30.06B | Nov 14, 2025 | ▼ 46.1K |
MEDINA VALUE PARTNERS, LLC electrical industrial apparatus | 987.2K | 2.98% | 2.98% | $26.38B | Nov 13, 2025 | ▲ 33.2K |
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC electrical industrial apparatus | 980.3K | 2.96% | 2.96% | $26.19B | Nov 12, 2025 | ▼ 59.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
31
Increased
+3.19M shares2
New Positions
first time holders16
Decreased
−1.74M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.46M
+3.19M / −1.74M
Net new holders
+17
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
THR insider trading · insider activity
Source: SEC Form 4
34
Buy transactions
23
Sell transactions
1.48
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Thames Bruce President & CEO | Jun 1, 2026 | Award | 78,307 | — | — | 468.6K | Form 4 ↗ |
Thames Bruce President & CEO | Jun 1, 2026 | D-Return | 468,595 | — | — | 0 | Form 4 ↗ |
Thames Bruce President & CEO | Jun 1, 2026 | D-Return | 32,472 | $14.28 | $463.7K | 0 | Form 4 ↗ |
Ryan Tarkington SVP, General Counsel | Jun 1, 2026 | Award | 15,113 | — | — | 68.5K | Form 4 ↗ |
Ryan Tarkington SVP, General Counsel | Jun 1, 2026 | D-Return | 68,531 | — | — | 0 | Form 4 ↗ |
Strzelecki Angela director | Jun 1, 2026 | D-Return | 13,643 | — | — | 0 | Form 4 ↗ |
Schott Jan L SVP, CFO | Jun 1, 2026 | Award | 14,014 | — | — | 35.7K | Form 4 ↗ |
Schott Jan L SVP, CFO | Jun 1, 2026 | D-Return | 35,742 | — | — | 0 | Form 4 ↗ |
RICHEY VICTOR L JR director | Jun 1, 2026 | D-Return | 8,052 | — | — | 0 | Form 4 ↗ |
Lucas Thomas Gregory VP, CAO | Jun 1, 2026 | Award | 6,976 | — | — | 19.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Thermon Group Holdings, Inc. (THR) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 7.70%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Thermon Group Holdings, Inc. is VANGUARD GROUP INC, holding approximately 3.17 million shares — equal to 9.56% of outstanding shares — as of September 30, 2025.
A total of 157 institutional investors currently hold THR stock, with a combined institutional value of approximately $885,247,013 as of the most recent 13F filing period.
Frequently asked questions
THR ownershipThermon Group Holdings, Inc. (THR) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.56% stake. Company insiders hold 7.70%. Data sourced from SEC Form 13F as of September 30, 2025.