William Blair Investment Management
THR

William Blair Investment Management’s Thermon Group Holdings THR Stock Holding History

William Blair Investment Management’s Portfolio THR Stock Details THR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-647,539
Closed -$32.6M – 443
2026
Q1 		$32.6M Sell
647,539
-239,912
-27% -$11.2M 0.11% 176
2025
Q4 		$33M Sell
887,451
-92,897
-9% -$3.05M 0.09% 188
2025
Q3 		$26.2M Sell
980,348
-59,447
-6% -$1.6M 0.07% 249
2025
Q2 		$29.2M Sell
1,039,795
-82,523
-7% -$2.24M 0.08% 218
2025
Q1 		$31.3M Buy
1,122,318
+264,685
+31% +$7.66M 0.09% 212
2024
Q4 		$24.7M Buy
857,633
+6,821
+0.8% +$201K 0.06% 286
2024
Q3 		$25.4M Buy
850,812
+5,816
+0.7% +$175K 0.06% 271
2024
Q2 		$26M Sell
844,996
-56,248
-6% -$1.8M 0.07% 258
2024
Q1 		$29.5M Buy
901,244
+163,640
+22% +$4.81M 0.08% 246
2023
Q4 		$24M Sell
737,604
-92
-0% -$2.74K 0.07% 267
2023
Q3 		$20.3M Sell
737,696
-33,545
-4% -$900K 0.07% 273
2023
Q2 		$20.5M Buy
+771,241
New +$17.9M 0.07% 278

Other funds holding THR

Nuveen
Nuveen Charlotte, North Carolina $419B AUM 43.02% 1-Year Est. Return
IA
IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return
HNB
Huntington National Bank Columbus, Ohio $20.6B AUM 34.61% 1-Year Est. Return

William Blair Investment Management's THR Position: Q2 2026 in Review

William Blair Investment Management sold out of Thermon Group Holdings (THR) in Q2 2026, closing a stake of 647,539 shares — an estimated $32.6M sold.

William Blair Investment Management first reported a position in THR in Q2 2023 and held it in 12 quarters. The position peaked at $33M in Q4 2025. 3 funds tracked by Wall St. Rank hold THR as of Q2 2026.

  • William Blair Investment Management reported no remaining Thermon Group Holdings position as of Q2 2026 after selling out during the quarter.
  • William Blair Investment Management sold 647,539 Thermon Group Holdings shares in Q2 2026, an estimated $32.6M.
  • William Blair Investment Management first reported a position in Thermon Group Holdings in Q2 2023 and held it in 12 quarters.
  • William Blair Investment Management's Thermon Group Holdings position peaked at $33M in Q4 2025.
  • 3 funds tracked by Wall St. Rank held Thermon Group Holdings as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.