Simplex Trading
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Simplex Trading’s AC Immune ACIU Stock Holding History

Simplex Trading’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 		$275 Sell
100
-4,900
-98% -$15.2K ﹤0.01% 8810
2025
Q4 		$15.7K Buy
+5,000
New +$15.8K ﹤0.01% 6682
2025
Q2 		– Sell
-800
Closed -$1K – 8490
2025
Q1 		$1K Buy
+800
New +$2.02K ﹤0.01% 8129
2024
Q4 		– Sell
-1,000
Closed -$3K – 8373
2024
Q3 		$3K Hold
1,000
– – ﹤0.01% 7801
2024
Q2 		$3K Sell
1,000
-3,800
-79% -$12.6K ﹤0.01% 8062
2024
Q1 		$14K Buy
4,800
+3,600
+300% +$12.9K ﹤0.01% 7354
2023
Q4 		$6K Buy
+1,200
New +$3.86K ﹤0.01% 7724
2023
Q3 		– Sell
-600
Closed -$1K – 8519
2023
Q2 		$1K Buy
+600
New +$1.31K ﹤0.01% 8551
2023
Q1 		– Sell
-7,300
Closed -$14K – 8877
2022
Q4 		$14K Sell
7,300
-400
-5% -$1.03K ﹤0.01% 7193
2022
Q3 		$24K Sell
7,700
-800
-9% -$2.52K ﹤0.01% 7306
2022
Q2 		$30K Buy
8,500
+8,100
+2,025% +$27.7K ﹤0.01% 7135
2022
Q1 		$1K Sell
400
-4,800
-92% -$20.8K ﹤0.01% 10018
2021
Q4 		$25K Buy
5,200
+2,900
+126% +$16.9K ﹤0.01% 8103
2021
Q3 		$18K Hold
2,300
– – ﹤0.01% 8506
2021
Q2 		$18K Buy
2,300
+2,288
+19,067% +$15.8K ﹤0.01% 8659
2021
Q1 		$9K Buy
+12
New +$86 ﹤0.01% 7924

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
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Simplex Trading's ACIU Position: Q1 2026 in Review

Simplex Trading opened a new position in AC Immune (ACIU) in Q1 2026: 6,620 shares worth $18.2K. The stake represents ﹤0.01% of the portfolio and ranks #6854 among its holdings. This is a return to the name: Simplex Trading previously reported a position in ACIU as recently as Q3 2025.

Simplex Trading first reported a position in ACIU in Q3 2020 and has held it in 14 quarters since. The position peaked at $58K in Q1 2021. 46 funds tracked by Wall St. Rank hold ACIU as of Q1 2026.

  • Simplex Trading held 6,620 shares of AC Immune worth $18.2K as of Q1 2026.
  • AC Immune was a new Simplex Trading position in Q1 2026.
  • AC Immune made up ﹤0.01% of Simplex Trading's portfolio in Q1 2026, its #6854 holding.
  • Simplex Trading first reported a position in AC Immune in Q3 2020 and has held it in 14 quarters since.
  • Simplex Trading's AC Immune position peaked at $58K in Q1 2021.
  • 46 funds tracked by Wall St. Rank held AC Immune as of Q1 2026.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.