RBF Capital’s Aspen Aerogels ASPN Stock Holding History

RBF Capital’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	$342K	Hold	100,000	–	–	0.02%	409
2025 Q4	$283K	Buy	+100,000	New	+$516K	0.01%	483
2022 Q1	–	Sell	-5,000	Closed	-$249K	–	520
2021 Q4	$249K	Hold	5,000	–	–	0.02%	451
2021 Q3	$230K	Buy	+5,000	New	+$198K	0.01%	433
2020 Q4	–	Sell	-60,845	Closed	-$666K	–	397
2020 Q3	$666K	Hold	60,845	–	–	0.07%	213
2020 Q2	$400K	Hold	60,845	–	–	0.04%	265
2020 Q1	$374K	Hold	60,845	–	–	0.05%	246
2019 Q4	$472K	Hold	60,845	–	–	0.05%	259
2019 Q3	$360K	Hold	60,845	–	–	0.04%	267
2019 Q2	$434K	Hold	60,845	–	–	0.04%	258
2019 Q1	$155K	Sell	60,845 -148,811	-71%	-$442K	0.02%	335
2018 Q4	$447K	Buy	209,656 +168,545	+410%	+$571K	0.06%	221
2018 Q3	$188K	Hold	41,111	–	–	0.02%	350
2018 Q2	$199K	Hold	41,111	–	–	0.02%	333
2018 Q1	$172K	Hold	41,111	–	–	0.02%	327
2017 Q4	$201K	Hold	41,111	–	–	0.02%	325
2017 Q3	$173K	Hold	41,111	–	–	0.02%	325
2017 Q2	$183K	Hold	41,111	–	–	0.02%	310
2017 Q1	$171K	Hold	41,111	–	–	0.02%	313
2016 Q4	$179K	Hold	41,111	–	–	0.03%	314
2016 Q3	$245K	Buy	41,111 +5,100	+14%	+$25.7K	0.04%	269
2016 Q2	$179K	Buy	+36,011	New	+$158K	0.04%	298
2016 Q1	–	Sell	-10,000	Closed	-$61K	–	355
2015 Q4	$61K	Sell	10,000 -15,000	-60%	-$104K	0.01%	362
2015 Q3	$188K	Sell	25,000 -25,000	-50%	-$182K	0.04%	275
2015 Q2	$331K	Buy	+50,000	New	+$342K	0.06%	225

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

RBF Capital's ASPN Position: Q1 2026 in Review

RBF Capital held its Aspen Aerogels (ASPN) position steady in Q1 2026 at 100,000 shares worth $342K. The position accounts for 0.02% of the portfolio, ranked #409.

RBF Capital first reported a position in ASPN in Q2 2015 and has held it in 25 quarters since. The position peaked at $666K in Q3 2020. 166 funds tracked by Wall St. Rank hold ASPN as of Q1 2026.

RBF Capital held 100,000 shares of Aspen Aerogels worth $342K as of Q1 2026.
RBF Capital left its Aspen Aerogels share count unchanged in Q1 2026.
Aspen Aerogels made up 0.02% of RBF Capital's portfolio in Q1 2026, its #409 holding.
RBF Capital first reported a position in Aspen Aerogels in Q2 2015 and has held it in 25 quarters since.
RBF Capital's Aspen Aerogels position peaked at $666K in Q3 2020.
166 funds tracked by Wall St. Rank held Aspen Aerogels as of Q1 2026.

Based on RBF Capital's 13F filing for Q1 2026, filed 15 May 2026.