JY
ACIU icon

Jeff Yass’s AC Immune ACIU Stock Holding History

Jeff Yass’s Portfolio ACIU Stock Details ACIU Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$127K Sell
53,369
-35,893
-40% -$98.9K ﹤0.01% 12317
2026
Q1 		$245K Sell
89,262
-58,363
-40% -$181K ﹤0.01% 11303
2025
Q4 		$464K Buy
147,625
+125,785
+576% +$397K ﹤0.01% 8970
2025
Q3 		$63.1K Buy
+21,840
New +$49.3K ﹤0.01% 11779
2023
Q4 		– Sell
-71,487
Closed -$230K – 12250
2023
Q3 		$204K Sell
71,487
-3,885
-5% -$11.8K ﹤0.01% 10188
2023
Q2 		$223K Buy
75,372
+62,972
+508% +$137K ﹤0.01% 10056
2023
Q1 		$29K Sell
12,400
-47,516
-79% -$110K ﹤0.01% 11927
2022
Q4 		$122K Buy
+59,916
New +$154K ﹤0.01% 10745
2022
Q3 		– Sell
-16,546
Closed -$52.1K – 13061
2022
Q2 		$60K Sell
16,546
-9,562
-37% -$32.7K ﹤0.01% 11863
2022
Q1 		$104K Sell
26,108
-56,399
-68% -$244K ﹤0.01% 11872
2021
Q4 		$408K Buy
+82,507
New +$480K ﹤0.01% 9715
2021
Q2 		– Sell
-58,088
Closed -$401K – 12470
2021
Q1 		$442K Sell
58,088
-74,630
-56% -$533K ﹤0.01% 9758
2020
Q4 		$686K Buy
132,718
+80,959
+156% +$413K ﹤0.01% 7593
2020
Q3 		$253K Buy
51,759
+40,312
+352% +$289K ﹤0.01% 9039
2020
Q2 		$77K Buy
+11,447
New +$83.2K ﹤0.01% 9610

Other funds holding ACIU

BI
BVF Inc San Francisco, California $3.91B AUM 304.52% 1-Year Est. Return
Wells Fargo
Wells Fargo San Francisco, California $617B AUM 30.33% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $875B AUM 40.91% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Two Sigma Investments
Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Jeff Yass's ACIU Position: Q2 2026 in Review

Jeff Yass reduced its AC Immune (ACIU) stake by 40% in Q2 2026, selling an estimated $98.9K and leaving 53,369 shares worth $127K. The position accounts for ﹤0.01% of the portfolio, ranked #12317.

Jeff Yass first reported a position in ACIU in Q2 2020 and has held it in 15 quarters since. The position peaked at $686K in Q4 2020. 43 funds tracked by Wall St. Rank hold ACIU as of Q2 2026.

  • Jeff Yass held 53,369 shares of AC Immune worth $127K as of Q2 2026.
  • Jeff Yass sold 35,893 AC Immune shares in Q2 2026, an estimated $98.9K.
  • AC Immune made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #12317 holding.
  • Jeff Yass first reported a position in AC Immune in Q2 2020 and has held it in 15 quarters since.
  • Jeff Yass's AC Immune position peaked at $686K in Q4 2020.
  • 43 funds tracked by Wall St. Rank held AC Immune as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.