California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s MKS Inc MKSI Stock Holding History

California State Teachers Retirement System (CalSTRS)’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 		$17.9M Buy
77,734
+13,880
+22% +$3.14M 0.02% 531
2025
Q4 		$10.2M Buy
63,854
+1,632
+3% +$242K 0.01% 644
2025
Q3 		$7.7M Buy
62,222
+3
+0% +$320 0.01% 733
2025
Q2 		$6.18M Hold
62,219
– – 0.01% 805
2025
Q1 		$4.99M Sell
62,219
-711
-1% -$71.8K 0.01% 874
2024
Q4 		$6.57M Sell
62,930
-969
-2% -$105K 0.01% 779
2024
Q3 		$6.95M Sell
63,899
-1,866
-3% -$222K 0.01% 759
2024
Q2 		$8.59M Buy
65,765
+1,423
+2% +$180K 0.01% 666
2024
Q1 		$8.56M Sell
64,342
-3,778
-6% -$439K 0.01% 688
2023
Q4 		$7.01M Sell
68,120
-132
-0.2% -$10.7K 0.01% 765
2023
Q3 		$5.91M Sell
68,252
-7,150
-9% -$697K 0.01% 801
2023
Q2 		$8.15M Buy
75,402
+1,059
+1% +$96.9K 0.01% 729
2023
Q1 		$6.59M Sell
74,343
-1,022
-1% -$97.5K 0.01% 814
2022
Q4 		$6.39M Buy
75,365
+953
+1% +$76.4K 0.01% 818
2022
Q3 		$6.15M Buy
74,412
+2,963
+4% +$305K 0.01% 801
2022
Q2 		$7.33M Buy
71,449
+191
+0.3% +$22.3K 0.01% 751
2022
Q1 		$10.7M Sell
71,258
-6,003
-8% -$933K 0.01% 683
2021
Q4 		$13.5M Sell
77,261
-16,258
-17% -$2.54M 0.02% 666
2021
Q3 		$14.1M Sell
93,519
-2,375
-2% -$365K 0.02% 670
2021
Q2 		$17.1M Sell
95,894
-1,251
-1% -$227K 0.02% 614
2021
Q1 		$18M Sell
97,145
-497
-0.5% -$83.5K 0.02% 585
2020
Q4 		$14.7M Buy
97,642
+1,982
+2% +$259K 0.02% 614
2020
Q3 		$10.4M Sell
95,660
-2,575
-3% -$302K 0.02% 674
2020
Q2 		$11.1M Buy
98,235
+8,298
+9% +$826K 0.02% 619
2020
Q1 		$7.33M Buy
89,937
+6,348
+8% +$650K 0.02% 667
2019
Q4 		$9.2M Sell
83,589
-2,485
-3% -$260K 0.02% 712
2019
Q3 		$7.94M Buy
86,074
+232
+0.3% +$19.2K 0.02% 746
2019
Q2 		$6.69M Buy
85,842
+1,358
+2% +$115K 0.01% 842
2019
Q1 		$7.86M Sell
84,484
-294
-0.3% -$23.7K 0.02% 745
2018
Q4 		$5.48M Buy
84,778
+1,515
+2% +$110K 0.01% 856
2018
Q3 		$6.67M Sell
83,263
-30
-0% -$2.74K 0.01% 852
2018
Q2 		$7.97M Buy
83,293
+1,169
+1% +$127K 0.02% 767
2018
Q1 		$9.5M Sell
82,124
-2,879
-3% -$316K 0.02% 661
2017
Q4 		$8.03M Sell
85,003
-1,345
-2% -$134K 0.02% 754
2017
Q3 		$8.16M Sell
86,348
-9,173
-10% -$750K 0.02% 725
2017
Q2 		$6.43M Sell
95,521
-9,340
-9% -$708K 0.01% 881
2017
Q1 		$7.21M Sell
104,861
-4,900
-4% -$323K 0.01% 855
2016
Q4 		$6.52M Sell
109,761
-3,000
-3% -$162K 0.01% 919
2016
Q3 		$5.61M Buy
112,761
+900
+0.8% +$42.4K 0.01% 989
2016
Q2 		$4.82M Sell
111,861
-1,512
-1% -$58.7K 0.01% 1041
2016
Q1 		$4.27M Buy
113,373
+14,446
+15% +$493K 0.01% 1111
2015
Q4 		$3.56M Buy
98,927
+1,550
+2% +$55.2K 0.01% 1155
2015
Q3 		$3.27M Sell
97,377
-100
-0.1% -$3.48K 0.01% 1203
2015
Q2 		$3.7M Sell
97,477
-415
-0.4% -$15.1K 0.01% 1223
2015
Q1 		$3.31M Sell
97,892
-1,900
-2% -$66.8K 0.01% 1268
2014
Q4 		$3.65M Buy
99,792
+922
+0.9% +$32.6K 0.01% 1205
2014
Q3 		$3.3M Buy
98,870
+1,161
+1% +$38K 0.01% 1222
2014
Q2 		$3.05M Buy
97,709
+1,300
+1% +$37.7K 0.01% 1319
2014
Q1 		$2.88M Buy
96,409
+400
+0.4% +$12K 0.01% 1284
2013
Q4 		$2.88M Buy
96,009
+700
+0.7% +$20.4K 0.01% 1285
2013
Q3 		$2.53M Buy
95,309
+2,940
+3% +$78.5K 0.01% 1314
2013
Q2 		$2.45M Buy
+92,369
New +$2.5M 0.01% 1254

Other funds holding MKSI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Invesco
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
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Capital International Investors
Capital International Investors Los Angeles, California $427B AUM 29.17% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

California State Teachers Retirement System (CalSTRS)'s MKSI Position: Q1 2026 in Review

California State Teachers Retirement System (CalSTRS) increased its MKS Inc (MKSI) stake by 22% in Q1 2026, buying an estimated $3.14M and bringing the position to 77,734 shares worth $17.9M. The position accounts for 0.02% of the portfolio, ranked #531.

California State Teachers Retirement System (CalSTRS) first reported a position in MKSI in Q2 2013 and has held it in 52 quarters since. The position peaked at $18M in Q1 2021. 616 funds tracked by Wall St. Rank hold MKSI as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 77,734 shares of MKS Inc worth $17.9M as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) bought 13,880 MKS Inc shares in Q1 2026, an estimated $3.14M.
  • MKS Inc made up 0.02% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #531 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in MKS Inc in Q2 2013 and has held it in 52 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s MKS Inc position peaked at $18M in Q1 2021.
  • 616 funds tracked by Wall St. Rank held MKS Inc as of Q1 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q1 2026, filed 18 May 2026.