Jane Street’s Aspen Aerogels ASPN Stock Holding History

Jane Street’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	$67.7K	Buy	+19,800	New	+$66.7K	﹤0.01%	10842
2025 Q3	–	Sell	-10,000	Closed	-$59.2K	–	10734
2025 Q2	$59.2K	Sell	10,000 -5,300	-35%	-$30.5K	﹤0.01%	9131
2025 Q1	$97.8K	Sell	15,300 -13,600	-47%	-$131K	﹤0.01%	8819
2024 Q4	$343K	Buy	28,900 +15,000	+108%	+$256K	﹤0.01%	7512
2024 Q3	$385K	Sell	13,900 -236,000	-94%	-$5.9M	﹤0.01%	7638
2024 Q2	$5.96M	Buy	249,900 +16,900	+7%	+$397K	﹤0.01%	2714
2024 Q1	$4.1M	Buy	233,000 +221,500	+1,926%	+$3.26M	﹤0.01%	2928
2023 Q4	$181K	Buy	+11,500	New	+$119K	﹤0.01%	8283
2023 Q3	–	Sell	-44,700	Closed	-$353K	–	8588
2023 Q2	$353K	Buy	+44,700	New	+$311K	﹤0.01%	6874
2022 Q4	–	Sell	-14,400	Closed	-$133K	–	9094
2022 Q3	$133K	Buy	14,400 +2,900	+25%	+$35.1K	﹤0.01%	8475
2022 Q2	$114K	Buy	+11,500	New	+$232K	﹤0.01%	8563
2022 Q1	–	Sell	-13,000	Closed	-$647K	–	10241
2021 Q4	$647K	Buy	13,000 +6,900	+113%	+$364K	﹤0.01%	6780
2021 Q3	$281K	Buy	+6,100	New	+$242K	﹤0.01%	8318

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

Jane Street's ASPN Position: Q1 2026 in Review

Jane Street reduced its Aspen Aerogels (ASPN) stake by 36% in Q1 2026, selling an estimated $355K and leaving 187,860 shares worth $642K. The position accounts for ﹤0.01% of the portfolio, ranked #7458.

Jane Street first reported a position in ASPN in Q3 2015 and has held it in 21 quarters since. The position peaked at $8.49M in Q2 2024. 166 funds tracked by Wall St. Rank hold ASPN as of Q1 2026.

Jane Street held 187,860 shares of Aspen Aerogels worth $642K as of Q1 2026.
Jane Street sold 105,290 Aspen Aerogels shares in Q1 2026, an estimated $355K.
Aspen Aerogels made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #7458 holding.
Jane Street first reported a position in Aspen Aerogels in Q3 2015 and has held it in 21 quarters since.
Jane Street's Aspen Aerogels position peaked at $8.49M in Q2 2024.
166 funds tracked by Wall St. Rank held Aspen Aerogels as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.