Citadel Advisors
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Citadel Advisors’s XBiotech XBIT Stock Holding History

Citadel Advisors’s Portfolio XBIT Stock Details XBIT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-18,400
Closed -$44K – 14378
2025
Q4 		$44K Buy
+18,400
New +$45.4K ﹤0.01% 12093
2025
Q1 		– Sell
-200
Closed -$790 – 15708
2024
Q4 		$790 Buy
+200
New +$1.36K ﹤0.01% 14270
2024
Q3 		– Sell
-5,800
Closed -$29.8K – 15378
2024
Q2 		$29.8K Sell
5,800
-500
-8% -$3.86K ﹤0.01% 12280
2024
Q1 		$51.2K Buy
6,300
+5,500
+688% +$31.5K ﹤0.01% 12155
2023
Q4 		$3.2K Buy
800
+700
+700% +$2.79K ﹤0.01% 13619
2023
Q3 		$412 Sell
100
-1,800
-95% -$9.01K ﹤0.01% 14064
2023
Q2 		$11.3K Buy
+1,900
New +$8.57K ﹤0.01% 13153
2023
Q1 		– Sell
-1,900
Closed -$6.67K – 15607
2022
Q4 		$6.67K Buy
+1,900
New +$6.48K ﹤0.01% 13898
2021
Q3 		– Sell
-16,100
Closed -$267K – 14766
2021
Q2 		$267K Buy
+16,100
New +$273K ﹤0.01% 11552
2021
Q1 		– Sell
-15,900
Closed -$249K – 13791
2020
Q4 		$249K Sell
15,900
-6,500
-29% -$120K ﹤0.01% 9407
2020
Q3 		$428K Buy
+22,400
New +$387K ﹤0.01% 7552
2018
Q3 		– Sell
-15,800
Closed -$71K – 9759
2018
Q2 		$71K Buy
15,800
+4,800
+44% +$21.7K ﹤0.01% 8362
2018
Q1 		$59K Buy
+11,000
New +$50.7K ﹤0.01% 7882
2017
Q3 		– Sell
-30,300
Closed -$142K – 8129
2017
Q2 		$142K Buy
30,300
+14,300
+89% +$137K ﹤0.01% 6780
2017
Q1 		$264K Buy
+16,000
New +$209K ﹤0.01% 6077

Other funds holding XBIT

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
RC
RBF Capital San Francisco, California $2.41B AUM 39.41% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
BCM
Bridgeway Capital Management Houston, Texas $5.69B AUM 60.64% 1-Year Est. Return
Vanguard Fiduciary Trust
Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Citadel Advisors's XBIT Position: Q2 2026 in Review

Citadel Advisors opened a new position in XBiotech (XBIT) in Q2 2026: 29,192 shares worth $67.1K. The stake represents ﹤0.01% of the portfolio and ranks #12963 among its holdings. This is a return to the name: Citadel Advisors previously reported a position in XBIT as recently as Q3 2025.

Citadel Advisors first reported a position in XBIT in Q2 2017 and has held it in 18 quarters since. The position peaked at $619K in Q3 2021. 36 funds tracked by Wall St. Rank hold XBIT as of Q2 2026.

  • Citadel Advisors held 29,192 shares of XBiotech worth $67.1K as of Q2 2026.
  • XBiotech was a new Citadel Advisors position in Q2 2026.
  • XBiotech made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #12963 holding.
  • Citadel Advisors first reported a position in XBiotech in Q2 2017 and has held it in 18 quarters since.
  • Citadel Advisors's XBiotech position peaked at $619K in Q3 2021.
  • 36 funds tracked by Wall St. Rank held XBiotech as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.