California State Teachers Retirement System (CalSTRS)
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California State Teachers Retirement System (CalSTRS)’s ASP Isotopes ASPI Stock Holding History

California State Teachers Retirement System (CalSTRS)’s Portfolio ASPI Stock Details ASPI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$346K Buy
78,212
+1,004
+1% +$5.94K ﹤0.01% 2143
2025
Q4 		$413K Buy
77,208
+73,441
+1,950% +$584K ﹤0.01% 2160
2025
Q3 		$36.2K Buy
3,767
+2
+0.1% +$18 ﹤0.01% 2350
2025
Q2 		$27.7K Hold
3,765
– – ﹤0.01% 2405
2025
Q1 		$17.7K Hold
3,765
– – ﹤0.01% 2572
2024
Q4 		$17.1K Hold
3,765
– – ﹤0.01% 2667
2024
Q3 		$10.5K Buy
3,765
+893
+31% +$2.37K ﹤0.01% 2867
2024
Q2 		$8.79K Buy
+2,872
New +$11.1K ﹤0.01% 2940

Other funds holding ASPI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
ECA
Encompass Capital Advisors New York $3.34B AUM 167.64% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
RIM
Rovida Investment Management Grand Cayman, Cayman Islands $797M AUM 111.83% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
ETC
Exchange Traded Concepts Oklahoma City, Oklahoma $14.1B AUM 25.71% 1-Year Est. Return
AIC
AWM Investment Company New York $903M AUM 163.47% 1-Year Est. Return

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

California State Teachers Retirement System (CalSTRS) increased its ASP Isotopes (ASPI) stake by 1.3% in Q1 2026, buying an estimated $5.94K and bringing the position to 78,212 shares worth $346K. The position accounts for ﹤0.01% of the portfolio, ranked #2143.

California State Teachers Retirement System (CalSTRS) first reported a position in ASPI in Q2 2024 and has held it in 8 quarters since. The position peaked at $413K in Q4 2025. 177 funds tracked by Wall St. Rank hold ASPI as of Q1 2026.

  • California State Teachers Retirement System (CalSTRS) held 78,212 shares of ASP Isotopes worth $346K as of Q1 2026.
  • California State Teachers Retirement System (CalSTRS) bought 1,004 ASP Isotopes shares in Q1 2026, an estimated $5.94K.
  • ASP Isotopes made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q1 2026, its #2143 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in ASP Isotopes in Q2 2024 and has held it in 8 quarters since.
  • California State Teachers Retirement System (CalSTRS)'s ASP Isotopes position peaked at $413K in Q4 2025.
  • 177 funds tracked by Wall St. Rank held ASP Isotopes as of Q1 2026.

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