Citadel Advisors
HDSN

Citadel Advisors’s Hudson Technologies HDSN Stock Holding History

Citadel Advisors’s Portfolio HDSN Stock Details HDSN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-22,300
Closed -$138K – 13539
2025
Q1 		$138K Buy
22,300
+3,000
+16% +$17.6K ﹤0.01% 11007
2024
Q4 		$108K Buy
19,300
+1,700
+10% +$11.2K ﹤0.01% 11369
2024
Q3 		$147K Sell
17,600
-61,100
-78% -$505K ﹤0.01% 10590
2024
Q2 		$692K Sell
78,700
-84,300
-52% -$817K ﹤0.01% 7377
2024
Q1 		$1.79M Buy
163,000
+137,700
+544% +$1.79M ﹤0.01% 5734
2023
Q4 		$341K Sell
25,300
-800
-3% -$10.3K ﹤0.01% 8902
2023
Q3 		$347K Sell
26,100
-2,900
-10% -$31.3K ﹤0.01% 8864
2023
Q2 		$279K Sell
29,000
-100,000
-78% -$869K ﹤0.01% 9202
2023
Q1 		$1.13M Buy
129,000
+71,500
+124% +$692K ﹤0.01% 6514
2022
Q4 		$582K Buy
+57,500
New +$562K ﹤0.01% 7927
2018
Q4 		– Sell
-17,800
Closed -$23K – 9385
2018
Q3 		$23K Sell
17,800
-4,400
-20% -$7.8K ﹤0.01% 8989
2018
Q2 		$45K Buy
+22,200
New +$72K ﹤0.01% 8457
2017
Q4 		– Sell
-12,100
Closed -$95K – 8166
2017
Q3 		$95K Buy
+12,100
New +$105K ﹤0.01% 7054
2017
Q2 		– Sell
-12,000
Closed -$79K – 7700
2017
Q1 		$79K Buy
+12,000
New +$87.3K ﹤0.01% 6933

Other funds holding HDSN

HP
Hartree Partners New York $469M AUM 46.64% 1-Year Est. Return
WCM
Westerly Capital Management San Francisco, California $542M AUM 48.48% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Arrowstreet Capital
Arrowstreet Capital Boston, Massachusetts $225B AUM 49.49% 1-Year Est. Return

Citadel Advisors's HDSN Position: Q2 2026 in Review

Citadel Advisors increased its Hudson Technologies (HDSN) stake by 39% in Q2 2026, buying an estimated $919K and bringing the position to 574,266 shares worth $3.3M. The position accounts for ﹤0.01% of the portfolio, ranked #5523.

Citadel Advisors first reported a position in HDSN in Q4 2014 and has held it in 30 quarters since. The position peaked at $3.79M in Q2 2024. 152 funds tracked by Wall St. Rank hold HDSN as of Q2 2026.

  • Citadel Advisors held 574,266 shares of Hudson Technologies worth $3.3M as of Q2 2026.
  • Citadel Advisors bought 161,516 Hudson Technologies shares in Q2 2026, an estimated $919K.
  • Hudson Technologies made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #5523 holding.
  • Citadel Advisors first reported a position in Hudson Technologies in Q4 2014 and has held it in 30 quarters since.
  • Citadel Advisors's Hudson Technologies position peaked at $3.79M in Q2 2024.
  • 152 funds tracked by Wall St. Rank held Hudson Technologies as of Q2 2026.

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