Millennium Management’s Aspen Aerogels ASPN Stock Holding History

Millennium 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
2026 Q1	$4.8M	Buy	1,404,675 +533,724	+61%	+$1.8M	﹤0.01%	2991
2025 Q4	$2.46M	Sell	870,951 -576,566	-40%	-$2.97M	﹤0.01%	3756
2025 Q3	$10.1M	Buy	1,447,517 +540,772	+60%	+$3.81M	﹤0.01%	2373
2025 Q2	$5.37M	Sell	906,745 -692,647	-43%	-$3.98M	﹤0.01%	2912
2025 Q1	$10.2M	Sell	1,599,392 -22,630	-1%	-$218K	0.01%	2167
2024 Q4	$19.3M	Buy	1,622,022 +1,588,632	+4,758%	+$27.1M	0.01%	1556
2024 Q3	$925K	Sell	33,390 -358,173	-91%	-$8.96M	﹤0.01%	4341
2024 Q2	$9.34M	Buy	+391,563	New	+$9.19M	﹤0.01%	2146
2023 Q4	–	Sell	-19,159	Closed	-$165K	–	6064
2023 Q3	$165K	Sell	19,159 -398,549	-95%	-$2.83M	﹤0.01%	5192
2023 Q2	$3.3M	Sell	417,708 -853,032	-67%	-$5.94M	﹤0.01%	3051
2023 Q1	$9.47M	Buy	1,270,740 +231,770	+22%	+$2.3M	0.01%	2011
2022 Q4	$12.2M	Buy	1,038,970 +938,293	+932%	+$10.7M	0.01%	1902
2022 Q3	$928K	Sell	100,677 -103,428	-51%	-$1.25M	﹤0.01%	4404
2022 Q2	$2.02M	Sell	204,105 -8,188	-4%	-$165K	﹤0.01%	3699
2022 Q1	$7.32M	Buy	212,293 +173,755	+451%	+$5.64M	﹤0.01%	2515
2021 Q4	$1.92M	Sell	38,538 -117,972	-75%	-$6.22M	﹤0.01%	3817
2021 Q3	$7.2M	Sell	156,510 -286,251	-65%	-$11.3M	﹤0.01%	2447
2021 Q2	$13.2M	Buy	442,761 +355,277	+406%	+$7.25M	0.01%	1580
2021 Q1	$1.78M	Buy	+87,484	New	+$1.85M	﹤0.01%	3646
2020 Q2	–	Sell	-211,778	Closed	-$1.3M	–	4150
2020 Q1	$1.3M	Buy	+211,778	New	+$1.72M	﹤0.01%	2298
2018 Q1	–	Sell	-30,945	Closed	-$151K	–	3613
2017 Q4	$151K	Buy	+30,945	New	+$144K	﹤0.01%	3588
2017 Q3	–	Sell	-13,000	Closed	-$58K	–	3488
2017 Q2	$58K	Buy	+13,000	New	+$54.9K	﹤0.01%	3355
2017 Q1	–	Sell	-35,746	Closed	-$148K	–	3469
2016 Q4	$148K	Buy	+35,746	New	+$174K	﹤0.01%	3142
2015 Q4	–	Sell	-27,520	Closed	-$206K	–	3400
2015 Q3	$206K	Buy	+27,520	New	+$200K	﹤0.01%	3101
2014 Q4	–	Sell	-20,044	Closed	-$202K	–	3889
2014 Q3	$202K	Sell	20,044 -53,850	-73%	-$545K	﹤0.01%	3423
2014 Q2	$817K	Buy	+73,894	New	+$802K	﹤0.01%	2313

Other funds holding ASPN

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

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

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

Millennium Management's ASPN Position: Q1 2026 in Review

Millennium Management increased its Aspen Aerogels (ASPN) stake by 61% in Q1 2026, buying an estimated $1.8M and bringing the position to 1,404,675 shares worth $4.8M. The position accounts for ﹤0.01% of the portfolio, ranked #2991.

Millennium Management first reported a position in ASPN in Q2 2014 and has held it in 26 quarters since. The position peaked at $19.3M in Q4 2024. 166 funds tracked by Wall St. Rank hold ASPN as of Q1 2026.

Millennium Management held 1,404,675 shares of Aspen Aerogels worth $4.8M as of Q1 2026.
Millennium Management bought 533,724 Aspen Aerogels shares in Q1 2026, an estimated $1.8M.
Aspen Aerogels made up ﹤0.01% of Millennium Management's portfolio in Q1 2026, its #2991 holding.
Millennium Management first reported a position in Aspen Aerogels in Q2 2014 and has held it in 26 quarters since.
Millennium Management's Aspen Aerogels position peaked at $19.3M in Q4 2024.
166 funds tracked by Wall St. Rank held Aspen Aerogels as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.