Citadel Advisors
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Citadel Advisors’s Aspen Aerogels ASPN Stock Holding History

Citadel Advisors’s Portfolio ASPN Stock Details ASPN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$272K Sell
79,500
-95,300
-55% -$321K ﹤0.01% 10694
2025
Q4 		$495K Buy
174,800
+11,200
+7% +$57.8K ﹤0.01% 9043
2025
Q3 		$1.14M Buy
163,600
+79,500
+95% +$561K ﹤0.01% 7253
2025
Q2 		$498K Sell
84,100
-140,600
-63% -$809K ﹤0.01% 8646
2025
Q1 		$1.44M Sell
224,700
-84,500
-27% -$815K ﹤0.01% 6176
2024
Q4 		$3.67M Buy
309,200
+138,000
+81% +$2.35M ﹤0.01% 4485
2024
Q3 		$4.74M Buy
171,200
+6,300
+4% +$158K ﹤0.01% 4022
2024
Q2 		$3.93M Buy
164,900
+87,100
+112% +$2.04M ﹤0.01% 4127
2024
Q1 		$1.37M Buy
77,800
+2,300
+3% +$33.9K ﹤0.01% 6273
2023
Q4 		$1.19M Buy
75,500
+30,900
+69% +$319K ﹤0.01% 6342
2023
Q3 		$384K Sell
44,600
-8,200
-16% -$58.3K ﹤0.01% 8647
2023
Q2 		$417K Sell
52,800
-6,600
-11% -$45.9K ﹤0.01% 8334
2023
Q1 		$443K Buy
59,400
+9,700
+20% +$96.4K ﹤0.01% 8560
2022
Q4 		$586K Sell
49,700
-15,200
-23% -$174K ﹤0.01% 7911
2022
Q3 		$598K Sell
64,900
-9,300
-13% -$113K ﹤0.01% 8067
2022
Q2 		$733K Buy
74,200
+4,000
+6% +$80.7K ﹤0.01% 7748
2022
Q1 		$2.42M Buy
70,200
+18,200
+35% +$591K ﹤0.01% 5675
2021
Q4 		$2.59M Sell
52,000
-158,900
-75% -$8.37M ﹤0.01% 5635
2021
Q3 		$9.7M Buy
210,900
+2,000
+1% +$79.3K ﹤0.01% 3134
2021
Q2 		$6.25M Buy
208,900
+24,400
+13% +$498K ﹤0.01% 3968
2021
Q1 		$3.75M Buy
+184,500
New +$3.89M ﹤0.01% 4916

Other funds holding ASPN

KL
KIM LLC Wichita, Kansas $976M AUM 0.91% 1-Year Est. Return
OCMI
Oaktop Capital Management II Chatham, New Jersey $1.34B AUM 114.5% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
NIM
Needham Investment Management New York $1.96B AUM 101.23% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
GKFF
George Kaiser Family Foundation Tulsa, Oklahoma $883M AUM 21.04% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
GS
Gagnon Securities New York $433M AUM 29.08% 1-Year Est. Return
RHJA
Rice Hall James & Associates San Diego, California $1.8B AUM 36.16% 1-Year Est. Return

Citadel Advisors's ASPN Position: Q1 2026 in Review

Citadel Advisors reduced its Aspen Aerogels (ASPN) stake by 33% in Q1 2026, selling an estimated $961K and leaving 581,187 shares worth $1.99M. The position accounts for ﹤0.01% of the portfolio, ranked #6076.

Citadel Advisors first reported a position in ASPN in Q4 2015 and has held it in 25 quarters since. The position peaked at $15M in Q2 2024. 166 funds tracked by Wall St. Rank hold ASPN as of Q1 2026.

  • Citadel Advisors held 581,187 shares of Aspen Aerogels worth $1.99M as of Q1 2026.
  • Citadel Advisors sold 285,031 Aspen Aerogels shares in Q1 2026, an estimated $961K.
  • Aspen Aerogels made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #6076 holding.
  • Citadel Advisors first reported a position in Aspen Aerogels in Q4 2015 and has held it in 25 quarters since.
  • Citadel Advisors's Aspen Aerogels position peaked at $15M in Q2 2024.
  • 166 funds tracked by Wall St. Rank held Aspen Aerogels as of Q1 2026.

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