Citadel Advisors
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Citadel Advisors’s Cytosorbents Corp CTSO Stock Holding History

Citadel Advisors’s Portfolio CTSO Stock Details CTSO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-6,900
Closed -$6.9K – 12910
2025
Q1 		$6.9K Buy
+6,900
New +$7.27K ﹤0.01% 13721
2024
Q3 		– Sell
-500
Closed -$352 – 14359
2024
Q2 		$352 Buy
+500
New +$434 ﹤0.01% 14015
2023
Q4 		– Sell
-2,100
Closed -$3.95K – 14384
2023
Q3 		$3.95K Buy
2,100
+300
+17% +$861 ﹤0.01% 13532
2023
Q2 		$6.46K Sell
1,800
-7,500
-81% -$23.7K ﹤0.01% 13421
2023
Q1 		$31.3K Buy
+9,300
New +$27.9K ﹤0.01% 12690
2021
Q4 		– Sell
-13,000
Closed -$106K – 13901
2021
Q3 		$106K Sell
13,000
-29,800
-70% -$242K ﹤0.01% 12804
2021
Q2 		$323K Buy
42,800
+8,500
+25% +$71.6K ﹤0.01% 11086
2021
Q1 		$298K Buy
34,300
+13,600
+66% +$130K ﹤0.01% 10870
2020
Q4 		$165K Sell
20,700
-9,900
-32% -$82.9K ﹤0.01% 9882
2020
Q3 		$244K Sell
30,600
-13,600
-31% -$123K ﹤0.01% 8482
2020
Q2 		$438K Buy
44,200
+19,100
+76% +$175K ﹤0.01% 7308
2020
Q1 		$194K Buy
+25,100
New +$127K ﹤0.01% 8033
2019
Q1 		– Sell
-10,100
Closed -$82K – 9336
2018
Q4 		$82K Sell
10,100
-3,400
-25% -$33.8K ﹤0.01% 8331
2018
Q3 		$174K Buy
+13,500
New +$169K ﹤0.01% 8316
2018
Q2 		– Sell
-14,400
Closed -$102K – 8875
2018
Q1 		$102K Buy
14,400
+1,400
+11% +$10.6K ﹤0.01% 7701
2017
Q4 		$85K Buy
+13,000
New +$82.7K ﹤0.01% 7485
2015
Q4 		– Sell
-2,200
Closed -$14K – 8776
2015
Q3 		$14K Sell
2,200
-8,300
-79% -$55.4K ﹤0.01% 8349
2015
Q2 		$64K Buy
+10,500
New +$71.4K ﹤0.01% 7484

Other funds holding CTSO

AC
Avenir Corporation Alexandria, Virginia $820M AUM 2.4% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
SC
Skylands Capital Milwaukee, Wisconsin $763M AUM 26.49% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $131B AUM 28.36% 1-Year Est. Return
CM
CM Management Gulf Breeze, Florida $120M AUM 37.12% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
SIG
Sargent Investment Group Bethesda, Maryland $759M AUM 28.58% 1-Year Est. Return
Pathstone Holdings
Pathstone Holdings Englewood, New Jersey $25.1B AUM 22.95% 1-Year Est. Return
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

Citadel Advisors's CTSO Position: Q1 2026 in Review

Citadel Advisors reduced its Cytosorbents Corp (CTSO) stake by 93% in Q1 2026, selling an estimated $94.5K and leaving 10,799 shares worth $6.12K. The position accounts for ﹤0.01% of the portfolio, ranked #12803.

Citadel Advisors first reported a position in CTSO in Q2 2015 and has held it in 24 quarters since. The position peaked at $1.03M in Q3 2020. 50 funds tracked by Wall St. Rank hold CTSO as of Q1 2026.

  • Citadel Advisors held 10,799 shares of Cytosorbents Corp worth $6.12K as of Q1 2026.
  • Citadel Advisors sold 138,480 Cytosorbents Corp shares in Q1 2026, an estimated $94.5K.
  • Cytosorbents Corp made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #12803 holding.
  • Citadel Advisors first reported a position in Cytosorbents Corp in Q2 2015 and has held it in 24 quarters since.
  • Citadel Advisors's Cytosorbents Corp position peaked at $1.03M in Q3 2020.
  • 50 funds tracked by Wall St. Rank held Cytosorbents Corp as of Q1 2026.

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