California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s Gossamer Bio GOSS Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio GOSS Stock Details GOSS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$3.42K Sell
10,399
-1,431
-12% -$2.25K ﹤0.01% 2887
2025
Q4 		$36.7K Sell
11,830
-29
-0.2% -$83 ﹤0.01% 2342
2025
Q3 		$31.2K Buy
11,859
+9
+0.1% +$20 ﹤0.01% 2403
2025
Q2 		$14.6K Buy
+11,850
New +$12.9K ﹤0.01% 2599
2023
Q2 		– Sell
-23,416
Closed -$29.5K – 3146
2023
Q1 		$29.5K Sell
23,416
-46,608
-67% -$89.2K ﹤0.01% 2929
2022
Q4 		$152K Buy
70,024
+776
+1% +$6.39K ﹤0.01% 2660
2022
Q3 		$830K Buy
69,248
+2,872
+4% +$35.6K ﹤0.01% 2019
2022
Q2 		$556K Sell
66,376
-2,914
-4% -$22.6K ﹤0.01% 2337
2022
Q1 		$601K Sell
69,290
-6,515
-9% -$62.8K ﹤0.01% 2318
2021
Q4 		$857K Buy
75,805
+1,713
+2% +$20.3K ﹤0.01% 2256
2021
Q3 		$931K Sell
74,092
-11,731
-14% -$108K ﹤0.01% 2185
2021
Q2 		$697K Buy
85,823
+384
+0.4% +$3.33K ﹤0.01% 2443
2021
Q1 		$790K Sell
85,439
-308
-0.4% -$3.1K ﹤0.01% 2285
2020
Q4 		$829K Hold
85,747
– – ﹤0.01% 2155
2020
Q3 		$1.06M Buy
85,747
+11,000
+15% +$146K ﹤0.01% 1828
2020
Q2 		$972K Buy
74,747
+8,835
+13% +$111K ﹤0.01% 1870
2020
Q1 		$669K Buy
65,912
+763
+1% +$9.96K ﹤0.01% 1907
2019
Q4 		$1.02M Sell
65,149
-1,674
-3% -$33.7K ﹤0.01% 1957
2019
Q3 		$1.12M Buy
66,823
+36,021
+117% +$716K ﹤0.01% 1868
2019
Q2 		$683K Buy
30,802
+13,601
+79% +$260K ﹤0.01% 2189
2019
Q1 		$373K Buy
+17,201
New +$359K ﹤0.01% 2462

Other funds holding GOSS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $141M AUM
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
AVM
Arch Venture Management Chicago, Illinois $677M AUM 322.07% 1-Year Est. Return
OCA
Octagon Capital Advisors New York $904M AUM 737.04% 1-Year Est. Return
SB
Samsara BioCapital Palo Alto, California $1.03B AUM 214.94% 1-Year Est. Return
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 1-Year Est. Return

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

California State Teachers Retirement System (CalSTRS) reduced its Gossamer Bio (GOSS) stake by 12% in Q1 2026, selling an estimated $2.25K and leaving 10,399 shares worth $3.42K. The position accounts for ﹤0.01% of the portfolio, ranked #2887.

California State Teachers Retirement System (CalSTRS) first reported a position in GOSS in Q1 2019 and has held it in 21 quarters since. The position peaked at $1.12M in Q3 2019. 184 funds tracked by Wall St. Rank hold GOSS as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 10,399 shares of Gossamer Bio worth $3.42K as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) sold 1,431 Gossamer Bio shares in Q1 2026, an estimated $2.25K.
  • Gossamer Bio made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #2887 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in Gossamer Bio in Q1 2019 and has held it in 21 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s Gossamer Bio position peaked at $1.12M in Q3 2019.
  • 184 funds tracked by Wall St. Rank held Gossamer Bio as of Q1 2026.

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