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ASPN Institutional Ownership & 13F Holders | SmartMoneyDB

ASPNASPEN AEROGELS INC

COM · CUSIP 04523Y105

Smart Money Ownership

Of the 11 tracked institutions holding ASPN, 5 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +6.4pt. It's a gauge of who owns the name, not just how many.

ASPN (ASPEN AEROGELS INC) Institutional Ownership Summary

Among the 11 tracked institutional investors we monitor, ASPN (ASPEN AEROGELS INC) is held with a combined value of $83.45M across 15,814,760 shares. The largest holder is BlackRock, Inc. with a position worth $33.46M. RENAISSANCE TECHNOLOGIES LLC opened a new position in the most recent quarter. 6 funds increased their holdings. 4 funds reduced their position.

Total Institutional Value

$83.45M

Total Shares Held

15,814,760

Institutional Holders

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

AQR CAPITAL MANAGEMENT LLC+143% shares~$4.8M BlackRock, Inc.+11% shares~$3.4M RENAISSANCE TECHNOLOGIES LLCNew position~$1.7M STATE STREET CORP+10% shares~$1.5M VANGUARD GROUP INC+4% shares~$497.8K

13F Institutional Holders

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AQR CAPITAL MANAGEMENT LLC

0.00% of book+142.6%

$8.09M

MILLENNIUM MANAGEMENT LLC

0.01% of book-15.2%

$7.55M

RENAISSANCE TECHNOLOGIES LLC

PRICE T ROWE ASSOCIATES INC /MD/

0.00% of book+21.4%

$827.00K

FMR LLC

0.00% of book+1428.8%

$434.13K

TWO SIGMA ADVISERS, LP

0.00% of book-0.2%

$295.17K

#	Fund	Value↓	Shares	Portfolio %	Change
1	BlackRock, Inc.	$33.46M	5,277,148	0.00%	+11.3%
2	STATE STREET CORP	$16.23M	2,559,495	0.00%	+10.3%
3	VANGUARD GROUP INC	$13.26M	4,685,950	0.00%	+3.9%
4	AQR CAPITAL MANAGEMENT LLC	$8.09M	1,276,346	0.00%	+142.6%
5	MILLENNIUM MANAGEMENT LLC	$7.55M	1,190,616	0.01%	-15.2%
6	RENAISSANCE TECHNOLOGIES LLC	$1.74M	274,392	0.00%	New
7	CITADEL ADVISORS LLC	$1.51M	238,731	0.00%	-58.9%
8	PRICE T ROWE ASSOCIATES INC /MD/	$827.00K	130,300	0.00%	+21.4%
9	FMR LLC	$434.13K	68,476	0.00%	+1428.8%
10	TWO SIGMA ADVISERS, LP	$295.17K	104,300	0.00%	-0.2%

Activist & Large Holders (13D/13G)

Investor	Ownership	Type	Filed
NEEDHAM INVESTMENT MANAGEMENT LLC	3.9%	13G/A	2026-08-13

SEC Schedule 13D (activist) and 13G (passive) filings for ASPN. Filed when an investor acquires 5%+ ownership.

Frequently Asked Questions

Which institutional investors own the most ASPN stock?

As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of ASPN with a position worth $33.46M, representing 0.00% of their portfolio. In total, 11 institutional investors hold ASPN with a combined value of $83.45M.

Are hedge funds buying or selling ASPN?

In the most recent quarter, 1 fund opened a new position in ASPN. Additionally, 6 increased their holdings and 4 reduced their positions.

What percentage of ASPN is owned by institutional investors?

Institutional investors hold $83.45M worth of ASPN stock across 11 positions. The largest institutional holder is BlackRock, Inc. with $33.46M in holdings.

What is a 13F filing and why does it matter for ASPN?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For ASPN, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track ASPN institutional moves

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