Portolan Capital Management’s Tower Semiconductor TSEM Stock Holding History

Portolan Capital 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 Q1	$5.62M	Sell	32,043 -116,482	-78%	-$15.7M	0.3%	92
2025 Q4	$17.4M	Sell	148,525 -178,780	-55%	-$17.2M	0.93%	32
2025 Q3	$23.7M	Buy	327,305 +217,673	+199%	+$11.9M	1.28%	22
2025 Q2	$4.75M	Buy	+109,632	New	+$4.21M	0.3%	87
2025 Q1	–	Sell	-74,707	Closed	-$3.85M	–	146
2024 Q4	$3.85M	Buy	+74,707	New	+$3.5M	0.26%	101
2016 Q1	–	Sell	-543,278	Closed	-$7.64M	–	134
2015 Q4	$7.64M	Sell	543,278 -465,180	-46%	-$6.72M	0.97%	29
2015 Q3	$13M	Buy	1,008,458 +611,484	+154%	+$8.22M	1.72%	11
2015 Q2	$6.13M	Buy	396,974 +114,079	+40%	+$1.83M	0.86%	42
2015 Q1	$4.8M	Buy	+282,895	New	+$4.34M	0.88%	45

Other funds holding TSEM

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Clal Insurance Tel-Aviv, Israel $16.6B AUM 68.34% 1-Year Est. Return

Phoenix Financial Givatayim, Israel $10.5B AUM 49.21% 1-Year Est. Return

UIM

USS Investment Management London, United Kingdom $25.6B AUM 30.22% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Senvest Management New York $3.01B AUM 35.7% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

MIFH

Migdal Insurance & Financial Holdings Petach Tikva, Israel $11.5B AUM 52.5% 1-Year Est. Return

HIIFS

Harel Insurance Investments & Financial Services Ramat Gan, Israel $14.7B AUM 47% 1-Year Est. Return

Portolan Capital Management's TSEM Position: Q1 2026 in Review

Portolan Capital Management reduced its Tower Semiconductor (TSEM) stake by 78% in Q1 2026, selling an estimated $15.7M and leaving 32,043 shares worth $5.62M. The position accounts for 0.3% of the portfolio, ranked #92.

Portolan Capital Management first reported a position in TSEM in Q1 2015 and has held it in 9 quarters since. The position peaked at $23.7M in Q3 2025. 377 funds tracked by Wall St. Rank hold TSEM as of Q1 2026.

Portolan Capital Management held 32,043 shares of Tower Semiconductor worth $5.62M as of Q1 2026.
Portolan Capital Management sold 116,482 Tower Semiconductor shares in Q1 2026, an estimated $15.7M.
Tower Semiconductor made up 0.3% of Portolan Capital Management's portfolio in Q1 2026, its #92 holding.
Portolan Capital Management first reported a position in Tower Semiconductor in Q1 2015 and has held it in 9 quarters since.
Portolan Capital Management's Tower Semiconductor position peaked at $23.7M in Q3 2025.
377 funds tracked by Wall St. Rank held Tower Semiconductor as of Q1 2026.

Based on Portolan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.