CM
ASPN icon

CastleKnight Management’s Aspen Aerogels ASPN Stock Holding History

CastleKnight Management’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
2025
Q1 		– Sell
-290,000
Closed -$3.45M – 361
2024
Q4 		$3.45M Buy
+290,000
New +$4.94M 0.1% 120

Other funds holding ASPN

KL
KIM LLC Wichita, Kansas $976M AUM 0.91% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
OCMI
Oaktop Capital Management II Chatham, New Jersey $1.34B AUM 114.5% 1-Year Est. Return
NIM
Needham Investment Management New York $1.96B AUM 101.23% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
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
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

CastleKnight Management's ASPN Position: Q4 2025 in Review

CastleKnight Management sold out of Aspen Aerogels (ASPN) in Q4 2025, closing a stake of 162,599 shares — an estimated $1.13M sold.

CastleKnight Management first reported a position in ASPN in Q4 2022 and held it in 9 quarters. The position peaked at $5.29M in Q4 2024. 183 funds tracked by Wall St. Rank hold ASPN as of Q4 2025.

  • CastleKnight Management reported no remaining Aspen Aerogels position as of Q4 2025 after selling out during the quarter.
  • CastleKnight Management sold 162,599 Aspen Aerogels shares in Q4 2025, an estimated $1.13M.
  • CastleKnight Management first reported a position in Aspen Aerogels in Q4 2022 and held it in 9 quarters.
  • CastleKnight Management's Aspen Aerogels position peaked at $5.29M in Q4 2024.
  • 183 funds tracked by Wall St. Rank held Aspen Aerogels as of Q4 2025.

Based on CastleKnight Management's 13F filing for Q4 2025, filed 17 Feb 2026.