Citadel Advisors
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Citadel Advisors’s iBio IBIO Stock Holding History

Citadel Advisors’s Portfolio IBIO Stock Details IBIO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.82M Buy
+956,429
New +$2.22M ﹤0.01% 6281
2025
Q4 		– Sell
-131,958
Closed -$109K – 13274
2025
Q3 		$109K Buy
+131,958
New +$101K ﹤0.01% 11788
2024
Q1 		– Sell
-25,387
Closed -$34.8K – 14961
2023
Q4 		$34.8K Buy
25,387
+25,384
+846,133% +$111K ﹤0.01% 12137
2023
Q3 		$16 Sell
3
-998
-100% -$8.62K ﹤0.01% 14196
2023
Q2 		$12.2K Buy
1,001
+624
+166% +$11.8K ﹤0.01% 13090
2023
Q1 		$15.7K Hold
377
– – ﹤0.01% 13245
2022
Q4 		$3.35K Sell
377
-7
-2% -$237 ﹤0.01% 14225
2022
Q3 		$33K Sell
384
-1,025
-73% -$141K ﹤0.01% 11845
2022
Q2 		$186K Buy
1,409
+996
+241% +$150K ﹤0.01% 10779
2022
Q1 		$88K Sell
413
-235
-36% -$49.2K ﹤0.01% 12399
2021
Q4 		$178K Buy
648
+486
+300% +$185K ﹤0.01% 12024
2021
Q3 		$86K Buy
162
+113
+231% +$70.4K ﹤0.01% 13008
2021
Q2 		$37K Sell
49
-55
-53% -$40.1K ﹤0.01% 13438
2021
Q1 		$80K Buy
+104
New +$90.6K ﹤0.01% 12629
2020
Q1 		– Sell
-236
Closed -$29K – 9841
2019
Q4 		$29K Buy
+236
New +$32K ﹤0.01% 8875
2019
Q3 		– Sell
-114
Closed -$40K – 9430
2019
Q2 		$40K Buy
114
+8
+8% +$3.23K ﹤0.01% 8799
2019
Q1 		$46K Buy
106
+53
+100% +$23K ﹤0.01% 8853
2018
Q4 		$20K Buy
+53
New +$20.5K ﹤0.01% 8751
2018
Q2 		– Sell
-26
Closed -$28K – 9020
2018
Q1 		$28K Buy
+26
New +$27.3K ﹤0.01% 8061
2017
Q3 		– Sell
-11
Closed -$22K – 7729
2017
Q2 		$22K Sell
11
-1
-8% -$1.96K ﹤0.01% 7263
2017
Q1 		$26K Buy
+12
New +$25K ﹤0.01% 7196
2016
Q2 		– Sell
-10
Closed -$29K – 7049
2016
Q1 		$29K Sell
10
-4
-29% -$11.5K ﹤0.01% 6382
2015
Q4 		$40K Buy
+14
New +$44.6K ﹤0.01% 7472
2015
Q2 		– Sell
-4
Closed -$17K – 8868
2015
Q1 		$17K Sell
4
-16
-80% -$54.3K ﹤0.01% 8009
2014
Q4 		$68K Buy
+20
New +$107K ﹤0.01% 6968
2014
Q2 		– Sell
-21
Closed -$56K – 8100
2014
Q1 		$56K Buy
21
+9
+75% +$24K ﹤0.01% 6684
2013
Q4 		$20K Buy
12
+7
+140% +$12.8K ﹤0.01% 6450
2013
Q3 		$11K Buy
+5
New +$12K ﹤0.01% 6446

Other funds holding IBIO

AAA
Affinity Asset Advisors New York $1.94B AUM 374.45% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
EC
EcoR1 Capital San Francisco, California $2.36B AUM 204.53% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
LGM
Logos Global Management San Francisco, California $2B AUM 444.09% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
IC
Ikarian Capital Dallas, Texas $1.23B AUM 600.17% 1-Year Est. Return
SCM
Sio Capital Management New York $697M AUM 79.73% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Citadel Advisors's IBIO Position: Q1 2026 in Review

Citadel Advisors opened a new position in iBio (IBIO) in Q1 2026: 956,429 shares worth $1.82M. The stake represents ﹤0.01% of the portfolio and ranks #6281 among its holdings. This is a return to the name: Citadel Advisors previously reported a position in IBIO as recently as Q3 2025.

Citadel Advisors first reported a position in IBIO in Q3 2013 and has held it in 28 quarters since. 52 funds tracked by Wall St. Rank hold IBIO as of Q1 2026.

  • Citadel Advisors held 956,429 shares of iBio worth $1.82M as of Q1 2026.
  • iBio was a new Citadel Advisors position in Q1 2026.
  • iBio made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #6281 holding.
  • Citadel Advisors first reported a position in iBio in Q3 2013 and has held it in 28 quarters since.
  • 52 funds tracked by Wall St. Rank held iBio as of Q1 2026.

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