California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s Tandem Diabetes Care TNDM Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio TNDM Stock Details TNDM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.62M Buy
84,255
+19,844
+31% +$431K ﹤0.01% 1638
2025
Q4 		$1.42M Buy
64,411
+3,810
+6% +$68.8K ﹤0.01% 1615
2025
Q3 		$736K Buy
60,601
+3
+0% +$41 ﹤0.01% 1924
2025
Q2 		$1.13M Sell
60,598
-639
-1% -$12.7K ﹤0.01% 1667
2025
Q1 		$1.17M Hold
61,237
– – ﹤0.01% 1612
2024
Q4 		$2.21M Buy
61,237
+127
+0.2% +$4.3K ﹤0.01% 1355
2024
Q3 		$2.59M Sell
61,110
-1,913
-3% -$81.1K ﹤0.01% 1262
2024
Q2 		$2.54M Sell
63,023
-2,166
-3% -$90.4K ﹤0.01% 1242
2024
Q1 		$2.31M Sell
65,189
-3,472
-5% -$93K ﹤0.01% 1321
2023
Q4 		$2.03M Sell
68,661
-2,779
-4% -$57.7K ﹤0.01% 1426
2023
Q3 		$1.48M Sell
71,440
-7,031
-9% -$193K ﹤0.01% 1567
2023
Q2 		$1.93M Sell
78,471
-1,899
-2% -$61.1K ﹤0.01% 1511
2023
Q1 		$3.26M Sell
80,370
-1,137
-1% -$47.1K ﹤0.01% 1187
2022
Q4 		$3.66M Buy
81,507
+1,119
+1% +$50.7K 0.01% 1118
2022
Q3 		$3.85M Sell
80,388
-1,465
-2% -$80.3K 0.01% 1047
2022
Q2 		$4.84M Buy
81,853
+1,048
+1% +$86K 0.01% 972
2022
Q1 		$9.4M Sell
80,805
-6,474
-7% -$756K 0.01% 743
2021
Q4 		$13.1M Sell
87,279
-17,253
-17% -$2.33M 0.02% 671
2021
Q3 		$12.5M Sell
104,532
-1,537
-1% -$169K 0.02% 716
2021
Q2 		$10.3M Sell
106,069
-1,969
-2% -$176K 0.01% 822
2021
Q1 		$9.53M Sell
108,038
-677
-0.6% -$62.9K 0.01% 821
2020
Q4 		$10.4M Buy
108,715
+4,486
+4% +$462K 0.01% 755
2020
Q3 		$11.8M Buy
104,229
+3,798
+4% +$399K 0.02% 630
2020
Q2 		$9.94M Buy
100,431
+15,223
+18% +$1.21M 0.02% 666
2020
Q1 		$5.48M Sell
85,208
-422
-0.5% -$29.6K 0.01% 777
2019
Q4 		$5.1M Sell
85,630
-1,730
-2% -$107K 0.01% 1012
2019
Q3 		$5.15M Buy
87,360
+1,904
+2% +$122K 0.01% 963
2019
Q2 		$5.51M Buy
85,456
+7,384
+9% +$477K 0.01% 941
2019
Q1 		$4.96M Sell
78,072
-1,737
-2% -$91.2K 0.01% 974
2018
Q4 		$3.03M Buy
79,809
+1,800
+2% +$63.6K 0.01% 1195
2018
Q3 		$3.34M Buy
78,009
+9,728
+14% +$340K 0.01% 1290
2018
Q2 		$1.5M Buy
+68,281
New +$840K ﹤0.01% 1787
2017
Q2 		– Sell
-3,820
Closed -$46K – 3052
2017
Q1 		$46K Sell
3,820
-90
-2% -$1.97K ﹤0.01% 2963
2016
Q4 		$84K Sell
3,910
-30
-0.8% -$1.15K ﹤0.01% 2956
2016
Q3 		$302K Buy
3,940
+40
+1% +$2.92K ﹤0.01% 2744
2016
Q2 		$294K Buy
3,900
+153
+4% +$12.3K ﹤0.01% 2769
2016
Q1 		$326K Buy
3,747
+469
+14% +$41K ﹤0.01% 2651
2015
Q4 		$387K Buy
3,278
+61
+2% +$6.05K ﹤0.01% 2586
2015
Q3 		$283K Sell
3,217
-10
-0.3% -$1.16K ﹤0.01% 2772
2015
Q2 		$350K Buy
3,227
+1,232
+62% +$153K ﹤0.01% 2783
2015
Q1 		$252K Buy
1,995
+450
+29% +$58.5K ﹤0.01% 2810
2014
Q4 		$196K Buy
1,545
+6
+0.4% +$832 ﹤0.01% 2927
2014
Q3 		$207K Buy
1,539
+9
+0.6% +$1.26K ﹤0.01% 2897
2014
Q2 		$249K Sell
1,530
-140
-8% -$23.8K ﹤0.01% 2886
2014
Q1 		$369K Hold
1,670
– – ﹤0.01% 2609
2013
Q4 		$430K Buy
+1,670
New +$382K ﹤0.01% 2518

Other funds holding TNDM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
SC
Sessa Capital New York $5.51B AUM 47.23% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
ACH
ArrowMark Colorado Holdings Denver, Colorado $3.76B AUM 21.77% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
GKIM
GW&K Investment Management Boston, Massachusetts $11.3B AUM 31.98% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
DCM
Driehaus Capital Management Chicago, Illinois $13.6B AUM 173.98% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

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

California State Teachers Retirement System (CalSTRS) increased its Tandem Diabetes Care (TNDM) stake by 31% in Q1 2026, buying an estimated $431K and bringing the position to 84,255 shares worth $1.62M. The position accounts for ﹤0.01% of the portfolio, ranked #1638.

California State Teachers Retirement System (CalSTRS) first reported a position in TNDM in Q4 2013 and has held it in 46 quarters since. The position peaked at $13.1M in Q4 2021. 272 funds tracked by Wall St. Rank hold TNDM as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 84,255 shares of Tandem Diabetes Care worth $1.62M as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) bought 19,844 Tandem Diabetes Care shares in Q1 2026, an estimated $431K.
  • Tandem Diabetes Care made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #1638 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Tandem Diabetes Care in Q4 2013 and has held it in 46 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Tandem Diabetes Care position peaked at $13.1M in Q4 2021.
  • 272 funds tracked by Wall St. Rank held Tandem Diabetes Care as of Q1 2026.

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