JY
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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 		$166K Buy
69,900
+44,300
+173% +$122K ﹤0.01% 12120
2026
Q1 		$70.4K Buy
+25,600
New +$79.5K ﹤0.01% 12508
2024
Q4 		– Sell
-12,300
Closed -$46.5K – 12074
2024
Q3 		$46.5K Buy
+12,300
New +$42.9K ﹤0.01% 11410
2024
Q2 		– Sell
-14,200
Closed -$42K – 11921
2024
Q1 		$42K Sell
14,200
-30,900
-69% -$111K ﹤0.01% 11623
2023
Q4 		$226K Sell
45,100
-11,500
-20% -$37K ﹤0.01% 10429
2023
Q3 		$161K Buy
56,600
+37,800
+201% +$115K ﹤0.01% 10466
2023
Q2 		$55.6K Buy
+18,800
New +$41K ﹤0.01% 11293
2022
Q4 		– Sell
-15,200
Closed -$48K – 12260
2022
Q3 		$48K Sell
15,200
-5,200
-25% -$16.4K ﹤0.01% 12227
2022
Q2 		$74K Sell
20,400
-89,000
-81% -$304K ﹤0.01% 11726
2022
Q1 		$438K Buy
109,400
+37,800
+53% +$164K ﹤0.01% 9311
2021
Q4 		$354K Sell
71,600
-34,900
-33% -$203K ﹤0.01% 10083
2021
Q3 		$715K Sell
106,500
-44,900
-30% -$321K ﹤0.01% 8448
2021
Q2 		$1.2M Sell
151,400
-107,900
-42% -$746K ﹤0.01% 7246
2021
Q1 		$1.97M Buy
259,300
+143,900
+125% +$1.03M ﹤0.01% 5957
2020
Q4 		$597K Sell
115,400
-21,200
-16% -$108K ﹤0.01% 7897
2020
Q3 		$667K Buy
+136,600
New +$980K ﹤0.01% 7064

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.