GAMCO Investors’s MKS Inc MKSI Stock Holding History

GAMCO Investors’s Portfolio MKSI Stock Details MKSI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$318K	Sell	715 -3,160	-82%	-$989K	﹤0.01%	832
2026 Q1	$891K	Sell	3,875 -10	-0.3%	-$2.26K	0.01%	646
2025 Q4	$621K	Sell	3,885 -4,000	-51%	-$593K	0.01%	756
2025 Q3	$976K	Sell	7,885 -600	-7%	-$64K	0.01%	649
2025 Q2	$843K	Sell	8,485 -60	-0.7%	-$4.88K	0.01%	701
2025 Q1	$685K	Buy	8,545 +4,485	+110%	+$453K	0.01%	626
2024 Q4	$424K	Buy	4,060 +1,100	+37%	+$119K	﹤0.01%	720
2024 Q3	$322K	Buy	+2,960	New	+$352K	﹤0.01%	767
2013 Q3	–	Sell	-8,000	Closed	-$212K	–	825
2013 Q2	$212K	Buy	+8,000	New	+$216K	﹤0.01%	765

Other funds holding MKSI

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Point72 Asset Management Stamford, Connecticut $90.7B AUM 77.13% 1-Year Est. Return

Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

AMH

Aspex Management (HK) Central, Hong Kong $8.89B AUM 39.91% 1-Year Est. Return

GAMCO Investors's MKSI Position: Q2 2026 in Review

GAMCO Investors reduced its MKS Inc (MKSI) stake by 82% in Q2 2026, selling an estimated $989K and leaving 715 shares worth $318K. The position accounts for ﹤0.01% of the portfolio, ranked #832.

GAMCO Investors first reported a position in MKSI in Q2 2013 and has held it in 9 quarters since. The position peaked at $976K in Q3 2025. 776 funds tracked by Wall St. Rank hold MKSI as of Q2 2026.

GAMCO Investors held 715 shares of MKS Inc worth $318K as of Q2 2026.
GAMCO Investors sold 3,160 MKS Inc shares in Q2 2026, an estimated $989K.
MKS Inc made up ﹤0.01% of GAMCO Investors's portfolio in Q2 2026, its #832 holding.
GAMCO Investors first reported a position in MKS Inc in Q2 2013 and has held it in 9 quarters since.
GAMCO Investors's MKS Inc position peaked at $976K in Q3 2025.
776 funds tracked by Wall St. Rank held MKS Inc as of Q2 2026.

Based on GAMCO Investors's 13F filing for Q2 2026, filed 12 Aug 2026.