Company · Ownership research

ASPEN AEROGELS INC ASPN

CIK 0001145986 · CUSIP 04523Y105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 04523Y105 (ASPN), not CUSIP 04523Y905 (ASPN), CUSIP 04523Y955 (ASPN), and does not merge CUSIPs.

This page lists the top 20 of 60 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	AIGH Capital Management LLC CIK 1835943 · View history	$39.18M 7,150,126 shares	4.45%	+7.15MNew	SEC filing ↗ Nov 2, 2026	▾
02	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$11.16M 2,036,230 shares	0.00%	+588.90K(+40.70%)Added	SEC filing ↗ Nov 4, 2026	▾
03	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$9.39M 1,712,989 shares	0.00%	-57.44K(-3.20%)Reduced	SEC filing ↗ Nov 6, 2026	▾
04	GAGNON SECURITIES LLC CIK 1125725 · View history	$8.54M 1,557,874 shares	1.48%	+22.06K(+1.40%)Added	SEC filing ↗ Nov 5, 2026	▾
05	DEUTSCHE BANK AG\ CIK 948046 · View history	$2.00M 364,807 shares	0.00%	-7.27K(-2.00%)Reduced	SEC filing ↗ Nov 6, 2026	▾
06	Y-Intercept (Hong Kong) Ltd CIK 1772875 · View history	$1.51M 275,553 shares	0.03%	+238.73K(+648.40%)Added	SEC filing ↗ Oct 16, 2026	▾
07	Bank of New York Mellon Corp CIK 1390777 · View history	$1.10M 200,513 shares	0.00%	+5.12K(+2.60%)Added	SEC filing ↗ Nov 5, 2026	▾
08	Russell Investments Group, Ltd. CIK 1692234 · View history	$799.84K 145,956 shares	0.00%	+25.65K(+21.30%)Added	SEC filing ↗ Nov 6, 2026	▾
09	CITIGROUP INC CIK 831001 · View history	$794.08K 144,905 shares	0.00%	-36.75K(-20.20%)Reduced	SEC filing ↗ Nov 4, 2026	▾
10	Mitsubishi UFJ Asset Management Co., Ltd. CIK 1466546 · View history	$589.13K 107,505 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 5, 2026	▾
11	Creative Planning CIK 1540235 · View history	$351.76K 64,190 shares	0.00%	+32.76K(+104.20%)Added	SEC filing ↗ Nov 2, 2026	▾
12	OPPENHEIMER & CO INC CIK 822581 · View history	$246.73K 45,023 shares	0.00%	-19.41K(-30.10%)Reduced	SEC filing ↗ Oct 26, 2026	▾
13	Savant Capital, LLC CIK 1482880 · View history	$232.05K 42,344 shares	0.00%	+42.34KNew	SEC filing ↗ Nov 6, 2026	▾
14	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC CIK 1632972 · View history	$225.82K 40,110 shares	0.00%	+9.72K(+32.00%)Added	SEC filing ↗ Oct 13, 2026	▾
15	Diversified Trust Co CIK 1479844 · View history	$181.10K 33,047 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Nov 6, 2026	▾
16	BARCLAYS PLC CIK 312069 · View history	$177.47K 32,385 shares	0.00%	+15.43K(+91.00%)Added	SEC filing ↗ Nov 6, 2026	▾
17	Concurrent Investment Advisors, LLC CIK 2001015 · View history	$164.67K 30,050 shares	0.00%	-2.00K(-6.20%)Reduced	SEC filing ↗ Oct 16, 2026	▾
18	State of Wyoming CIK 1821626 · View history	$162.87K 29,721 shares	0.01%	-8.28K(-21.80%)Reduced	SEC filing ↗ Oct 28, 2026	▾
19	SIMPLEX TRADING, LLC CIK 1488542 · View history	$118.83K 21,684 shares	0.00%	+5.73K(+35.90%)Added	SEC filing ↗ Nov 4, 2026	▾
20	ARS Investment Partners, LLC CIK 733020 · View history	$92.91K 16,955 shares	0.00%	+16.95KNew	SEC filing ↗ Nov 5, 2026	▾

Showing 20 / 60 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

14,144,151

Not deduplicated across managers

Disclosed value

$77.52M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ASPEN AEROGELS INC · Q3 2026

Explore all 60 reporting institutions.

This page includes 20 of 60 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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{"action":"holders","cusip":"04523Y105","quarter":"2026Q3","type":"positions","page_size":100}

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.