William Blair Investment Management
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William Blair Investment Management’s Tower Semiconductor TSEM Stock Holding History

William Blair Investment Management’s Portfolio TSEM Stock Details TSEM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$421K Sell
1,614
-82,480
-98% -$19.8M ﹤0.01% 380
2026
Q1 		$14.8M Sell
84,094
-294,886
-78% -$39.6M 0.05% 278
2025
Q4 		$44.5M Sell
378,980
-323,369
-46% -$31.1M 0.12% 150
2025
Q3 		$50.8M Sell
702,349
-50,655
-7% -$2.77M 0.13% 142
2025
Q2 		$32.6M Sell
753,004
-83,124
-10% -$3.19M 0.09% 186
2025
Q1 		$29.8M Sell
836,128
-201,660
-19% -$9.11M 0.08% 221
2024
Q4 		$53.5M Buy
1,037,788
+25,247
+2% +$1.18M 0.13% 147
2024
Q3 		$44.8M Sell
1,012,541
-28,443
-3% -$1.17M 0.11% 151
2024
Q2 		$40.9M Sell
1,040,984
-2,706
-0.3% -$96.1K 0.11% 160
2024
Q1 		$34.9M Buy
+1,043,690
New +$32.5M 0.09% 212
2022
Q2 		– Sell
-825,967
Closed -$40M – 447
2022
Q1 		$40M Sell
825,967
-778,972
-49% -$32.9M 0.12% 186
2021
Q4 		$63.7M Sell
1,604,939
-132,596
-8% -$4.6M 0.17% 142
2021
Q3 		$52M Buy
1,737,535
+1,734,040
+49,615% +$49.9M 0.15% 153
2021
Q2 		$103K Buy
+3,495
New +$98.2K ﹤0.01% 381
2018
Q3 		– Sell
-9,600
Closed -$211K – 484
2018
Q2 		$211K Buy
+9,600
New +$244K ﹤0.01% 474

Other funds holding TSEM

T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
CI
Clal Insurance Tel-Aviv, Israel $22.3B AUM 79.91% 1-Year Est. Return
PF
Phoenix Financial Givatayim, Israel $14.6B AUM 57.48% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
UIM
USS Investment Management London, United Kingdom $27.8B AUM 39.42% 1-Year Est. Return
HIIFS
Harel Insurance Investments & Financial Services Ramat Gan, Israel $20.6B AUM 59.59% 1-Year Est. Return
SM
Senvest Management New York $3.41B AUM 66.27% 1-Year Est. Return
MIFH
Migdal Insurance & Financial Holdings Petach Tikva, Israel $15.6B AUM 71.29% 1-Year Est. Return

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

William Blair Investment Management reduced its Tower Semiconductor (TSEM) stake by 98% in Q2 2026, selling an estimated $19.8M and leaving 1,614 shares worth $421K. The position accounts for ﹤0.01% of the portfolio, ranked #380.

William Blair Investment Management first reported a position in TSEM in Q2 2018 and has held it in 15 quarters since. The position peaked at $63.7M in Q4 2021. 451 funds tracked by Wall St. Rank hold TSEM as of Q2 2026.

  • William Blair Investment Management held 1,614 shares of Tower Semiconductor worth $421K as of Q2 2026.
  • William Blair Investment Management sold 82,480 Tower Semiconductor shares in Q2 2026, an estimated $19.8M.
  • Tower Semiconductor made up ﹤0.01% of William Blair Investment Management's portfolio in Q2 2026, its #380 holding.
  • William Blair Investment Management first reported a position in Tower Semiconductor in Q2 2018 and has held it in 15 quarters since.
  • William Blair Investment Management's Tower Semiconductor position peaked at $63.7M in Q4 2021.
  • 451 funds tracked by Wall St. Rank held Tower Semiconductor as of Q2 2026.

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