Needham Investment Management’s MKS Inc MKSI Stock Holding History

Needham Investment Management’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 Q1	$27.6M	Sell	120,000 -10,500	-8%	-$2.37M	1.41%	17
2025 Q4	$20.9M	Sell	130,500 -250	-0.2%	-$37.1K	1.32%	24
2025 Q3	$16.2M	Buy	130,750 +2,000	+2%	+$213K	1.13%	29
2025 Q2	$12.8M	Hold	128,750	–	–	1.02%	36
2025 Q1	$10.3M	Sell	128,750 -250	-0.2%	-$25.2K	0.97%	37
2024 Q4	$13.5M	Buy	129,000 +4,500	+4%	+$486K	1.04%	34
2024 Q3	$13.5M	Buy	124,500 +1,500	+1%	+$178K	1.04%	35
2024 Q2	$16.1M	Sell	123,000 -50,000	-29%	-$6.31M	1.32%	22
2024 Q1	$23M	Sell	173,000 -14,000	-7%	-$1.63M	2.14%	9
2023 Q4	$19.2M	Buy	187,000 +30,000	+19%	+$2.44M	2.43%	9
2023 Q3	$13.6M	Buy	157,000 +36,000	+30%	+$3.51M	2.31%	10
2023 Q2	$13.1M	Sell	121,000 -500	-0.4%	-$45.8K	2.16%	14
2023 Q1	$10.8M	Sell	121,500 -18,000	-13%	-$1.72M	1.86%	15
2022 Q4	$11.8M	Buy	139,500 +24,000	+21%	+$1.92M	2.14%	16
2022 Q3	$9.54M	Sell	115,500 -37,500	-25%	-$3.86M	1.87%	17
2022 Q2	$15.7M	Buy	153,000 +16,000	+12%	+$1.86M	2.94%	8
2022 Q1	$20.6M	Hold	137,000	–	–	2.97%	8
2021 Q4	$23.9M	Sell	137,000 -18,000	-12%	-$2.81M	3%	8
2021 Q3	$23.4M	Buy	155,000 +44,500	+40%	+$6.83M	3.12%	5
2021 Q2	$19.7M	Buy	110,500 +2,500	+2%	+$454K	2.88%	9
2021 Q1	$20M	Buy	108,000 +23,000	+27%	+$3.87M	2.74%	5
2020 Q4	$12.8M	Sell	85,000 -500	-0.6%	-$65.4K	2.15%	14
2020 Q3	$9.34M	Hold	85,500	–	–	1.86%	15
2020 Q2	$9.68M	Sell	85,500 -14,500	-15%	-$1.44M	2.07%	13
2020 Q1	$8.15M	Buy	100,000 +5,000	+5%	+$512K	2.31%	11
2019 Q4	$10.4M	Sell	95,000 -2,000	-2%	-$210K	2.85%	9
2019 Q3	$8.95M	Sell	97,000 -6,000	-6%	-$496K	2.87%	11
2019 Q2	$8.02M	Buy	103,000 +7,000	+7%	+$592K	2.65%	12
2019 Q1	$8.93M	Sell	96,000 -2,000	-2%	-$161K	3.04%	12
2018 Q4	$6.33M	Buy	98,000 +3,000	+3%	+$217K	2.38%	16
2018 Q3	$7.62M	Buy	95,000 +2,000	+2%	+$183K	2.29%	19
2018 Q2	$8.9M	Sell	93,000 -5,500	-6%	-$600K	2.5%	13
2018 Q1	$11.4M	Sell	98,500 -2,500	-2%	-$275K	3.26%	9
2017 Q4	$9.55M	Sell	101,000 -3,000	-3%	-$299K	2.54%	13
2017 Q3	$9.82M	Hold	104,000	–	–	2.49%	14
2017 Q2	$7M	Sell	104,000 -3,000	-3%	-$227K	1.86%	17
2017 Q1	$7.36M	Sell	107,000 -41,500	-28%	-$2.73M	1.89%	18
2016 Q4	$8.82M	Sell	148,500 -23,000	-13%	-$1.24M	2.26%	16
2016 Q3	$8.53M	Sell	171,500 -13,500	-7%	-$637K	2.25%	16
2016 Q2	$7.97M	Sell	185,000 -24,100	-12%	-$935K	2.2%	18
2016 Q1	$7.87M	Sell	209,100 -7,500	-3%	-$256K	2.05%	18
2015 Q4	$7.8M	Hold	216,600	–	–	1.94%	17
2015 Q3	$7.26M	Hold	216,600	–	–	1.82%	19
2015 Q2	$8.22M	Hold	216,600	–	–	1.78%	20
2015 Q1	$7.32M	Hold	216,600	–	–	1.56%	23
2014 Q4	$7.93M	Hold	216,600	–	–	1.67%	20
2014 Q3	$7.23M	Hold	216,600	–	–	1.6%	20
2014 Q2	$6.77M	Hold	216,600	–	–	1.41%	26
2014 Q1	$6.47M	Hold	216,600	–	–	1.37%	27
2013 Q4	$6.48M	Hold	216,600	–	–	1.34%	25
2013 Q3	$5.76M	Buy	216,600 +27,500	+15%	+$734K	1.29%	26
2013 Q2	$5.02M	Buy	+189,100	New	+$5.12M	1.17%	33

Other funds holding MKSI

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

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

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

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

Needham Investment Management's MKSI Position: Q1 2026 in Review

Needham Investment Management reduced its MKS Inc (MKSI) stake by 8% in Q1 2026, selling an estimated $2.37M and leaving 120,000 shares worth $27.6M. The position accounts for 1.41% of the portfolio, ranked #17.

Needham Investment Management first reported a position in MKSI in Q2 2013 and has held it in 52 quarters since. 615 funds tracked by Wall St. Rank hold MKSI as of Q1 2026.

Needham Investment Management held 120,000 shares of MKS Inc worth $27.6M as of Q1 2026.
Needham Investment Management sold 10,500 MKS Inc shares in Q1 2026, an estimated $2.37M.
MKS Inc made up 1.41% of Needham Investment Management's portfolio in Q1 2026, its #17 holding.
Needham Investment Management first reported a position in MKS Inc in Q2 2013 and has held it in 52 quarters since.
615 funds tracked by Wall St. Rank held MKS Inc as of Q1 2026.

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