Fox Run Management’s Aspen Aerogels ASPN Stock Holding History

Fox Run 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 Q4	–	Sell	-36,181	Closed	-$252K	–	899
2025 Q3	$252K	Buy	+36,181	New	+$255K	0.04%	741
2025 Q2	–	Sell	-23,955	Closed	-$153K	–	856
2025 Q1	$153K	Sell	23,955 -63,618	-73%	-$613K	0.02%	829
2024 Q4	$1.04M	Buy	+87,573	New	+$1.49M	0.19%	143
2024 Q3	–	Sell	-19,100	Closed	-$456K	–	793
2024 Q2	$456K	Buy	+19,100	New	+$448K	0.09%	438
2023 Q1	–	Sell	-14,304	Closed	-$169K	–	648
2022 Q4	$169K	Buy	+14,304	New	+$163K	0.07%	512

Other funds holding ASPN

KIM LLC Wichita, Kansas $976M AUM 0.91% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

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 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 Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Fox Run Management's ASPN Position: Q4 2025 in Review

Fox Run Management sold out of Aspen Aerogels (ASPN) in Q4 2025, closing a stake of 36,181 shares — an estimated $252K sold.

Fox Run Management first reported a position in ASPN in Q4 2022 and held it in 5 quarters. The position peaked at $1.04M in Q4 2024. 183 funds tracked by Wall St. Rank hold ASPN as of Q4 2025.

Fox Run Management reported no remaining Aspen Aerogels position as of Q4 2025 after selling out during the quarter.
Fox Run Management sold 36,181 Aspen Aerogels shares in Q4 2025, an estimated $252K.
Fox Run Management first reported a position in Aspen Aerogels in Q4 2022 and held it in 5 quarters.
Fox Run Management's Aspen Aerogels position peaked at $1.04M in Q4 2024.
183 funds tracked by Wall St. Rank held Aspen Aerogels as of Q4 2025.

Based on Fox Run Management's 13F filing for Q4 2025, filed 11 Feb 2026.