Citadel Advisors
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Citadel Advisors’s AC Immune ACIU Stock Holding History

Citadel Advisors’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
Q1 		$57.5K Sell
20,900
-29,600
-59% -$91.9K ﹤0.01% 12352
2025
Q4 		$159K Buy
+50,500
New +$159K ﹤0.01% 11255
2025
Q2 		– Sell
-4,800
Closed -$8.98K – 12318
2025
Q1 		$8.98K Sell
4,800
-2,800
-37% -$7.05K ﹤0.01% 13623
2024
Q4 		$20.5K Sell
7,600
-19,200
-72% -$60K ﹤0.01% 13170
2024
Q3 		$101K Buy
26,800
+13,900
+108% +$48.5K ﹤0.01% 11096
2024
Q2 		$51.5K Buy
12,900
+5,200
+68% +$17.2K ﹤0.01% 11725
2024
Q1 		$22.8K Sell
7,700
-3,900
-34% -$14K ﹤0.01% 12923
2023
Q4 		$58K Sell
11,600
-11,000
-49% -$35.4K ﹤0.01% 11634
2023
Q3 		$64.4K Sell
22,600
-5,300
-19% -$16.1K ﹤0.01% 11436
2023
Q2 		$82.4K Buy
27,900
+18,700
+203% +$40.8K ﹤0.01% 11210
2023
Q1 		$21.5K Buy
9,200
+5,700
+163% +$13.2K ﹤0.01% 13017
2022
Q4 		$7.14K Sell
3,500
-7,600
-68% -$19.6K ﹤0.01% 13844
2022
Q3 		$35K Buy
+11,100
New +$35K ﹤0.01% 11821
2022
Q2 		– Sell
-27,100
Closed -$108K – 12765
2022
Q1 		$108K Sell
27,100
-6,700
-20% -$29K ﹤0.01% 12209
2021
Q4 		$167K Sell
33,800
-15,700
-32% -$91.3K ﹤0.01% 12118
2021
Q3 		$332K Buy
49,500
+8,400
+20% +$60.1K ﹤0.01% 10841
2021
Q2 		$326K Buy
41,100
+24,400
+146% +$169K ﹤0.01% 11061
2021
Q1 		$127K Sell
16,700
-8,100
-33% -$57.8K ﹤0.01% 12230
2020
Q4 		$128K Sell
24,800
-3,400
-12% -$17.4K ﹤0.01% 10047
2020
Q3 		$138K Buy
+28,200
New +$202K ﹤0.01% 9057

Other funds holding ACIU

BI
BVF Inc San Francisco, California $3.14B AUM 249.53% 1-Year Est. Return
Wells Fargo
Wells Fargo San Francisco, California $530B AUM 22.01% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $185B AUM 39.58% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
DIG
Dauntless Investment Group Etna, New Hampshire $151M AUM 76.14% 1-Year Est. Return

Citadel Advisors's ACIU Position: Q1 2026 in Review

Citadel Advisors increased its AC Immune (ACIU) stake by 276% in Q1 2026, buying an estimated $609K and bringing the position to 267,233 shares worth $735K. The position accounts for ﹤0.01% of the portfolio, ranked #8401.

Citadel Advisors first reported a position in ACIU in Q3 2016 and has held it in 31 quarters since. The position peaked at $4.85M in Q4 2016. 46 funds tracked by Wall St. Rank hold ACIU as of Q1 2026.

  • Citadel Advisors held 267,233 shares of AC Immune worth $735K as of Q1 2026.
  • Citadel Advisors bought 196,082 AC Immune shares in Q1 2026, an estimated $609K.
  • AC Immune made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #8401 holding.
  • Citadel Advisors first reported a position in AC Immune in Q3 2016 and has held it in 31 quarters since.
  • Citadel Advisors's AC Immune position peaked at $4.85M in Q4 2016.
  • 46 funds tracked by Wall St. Rank held AC Immune as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.