What does CUSIP 04523Y105 represent in this 13F holders report?

CUSIP 04523Y105 is the security identifier for ASPN - ASPEN AEROGELS INC - Common Stock used to aggregate holder disclosures.

How many institutions held ASPN - ASPEN AEROGELS INC - Common Stock in Q1 2021?

83 institutional investors reported ASPN - ASPEN AEROGELS INC - Common Stock for Q1 2021. Use the holders table for investor-level position and value details.

ASPEN AEROGELS INC - Common Stock (ASPN)

CUSIP: 04523Y105

Q1 2021 13F Holders as of 31 Mar 2021

Type / Class: Equity / Common Stock
Shares outstanding: 82,107,547
Total 13F shares: 23,708,215
Share change: +1,816,914
Total reported value: $482,202,043
Put/Call ratio: 60%
Price per share: $20.34
Number of holders: 83
Value change: +$36,805,215
Number of buys: 44
Number of sells: 33

Quarterly Holders Quick Answers

What is CUSIP 04523Y105?
CUSIP 04523Y105 identifies ASPN - ASPEN AEROGELS INC - Common Stock in SEC institutional holdings data.

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Explore More Reporting Periods

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Newer quarter: Q2 2021
Previous quarter: Q4 2020

Recent filing periods for CUSIP 04523Y105:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of ASPN - ASPEN AEROGELS INC - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
GEORGE KAISER FAMILY FOUNDATION	13F	Individual	3.9%	3,167,322	$52,863,000	—	31 Dec 2020	13F
OAKTOP CAPITAL MANAGEMENT II, L.P.	13F	Company	3.6%	2,939,758	$49,065,000	—	31 Dec 2020	13F
Telemark Asset Management, LLC	13F	Company	2.7%	2,250,000	$37,553,000	—	31 Dec 2020	13F
BlackRock Finance, Inc.	13F	Company	2.2%	1,800,974	$30,059,000	—	31 Dec 2020	13F
VANGUARD GROUP INC	13F	Company	1.4%	1,168,859	$19,508,000	—	31 Dec 2020	13F
NEEDHAM INVESTMENT MANAGEMENT LLC	13F	Company	1.1%	931,400	$15,545,000	—	31 Dec 2020	13F
STATE STREET CORP	13F	Company	0.93%	764,816	$12,765,000	—	31 Dec 2020	13F
ROYCE & ASSOCIATES LP	13F	Company	0.87%	710,479	$11,858,000	—	31 Dec 2020	13F
NEXT CENTURY GROWTH INVESTORS LLC	13F	Company	0.84%	686,155	$11,451,000	—	31 Dec 2020	13F
DRIEHAUS CAPITAL MANAGEMENT LLC	13F	Company	0.8%	659,312	$11,004,000	—	31 Dec 2020	13F
AIGH Capital Management LLC	13F	Company	0.8%	655,819	$10,945,000	—	31 Dec 2020	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.72%	593,309	$9,902,000	—	31 Dec 2020	13F
ESSEX INVESTMENT MANAGEMENT CO LLC	13F	Company	0.71%	585,148	$9,766,000	—	31 Dec 2020	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.69%	566,751	$9,459,000	—	31 Dec 2020	13F
Cowen Prime Services LLC	13F	Company	0.57%	467,614	$7,804,000	—	31 Dec 2020	13F
Samjo Capital LLC	13F	Company	0.53%	432,657	$7,221,000	—	31 Dec 2020	13F
Harvey Partners, LLC	13F	Company	0.42%	347,500	$5,799,000	—	31 Dec 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.42%	345,550	$5,767,000	—	31 Dec 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.41%	339,917	$5,673,000	—	31 Dec 2020	13F
Baird Financial Group, Inc.	13F	Company	0.31%	256,764	$4,285,000	—	31 Dec 2020	13F
NORTHERN TRUST CORP	13F	Company	0.29%	235,652	$3,933,000	—	31 Dec 2020	13F
Informed Momentum Co LLC	13F	Company	0.23%	186,168	$3,107,000	—	31 Dec 2020	13F
Worth Venture Partners, LLC	13F	Company	0.21%	169,041	$2,821,000	—	31 Dec 2020	13F
SILVERCREST ASSET MANAGEMENT GROUP LLC	13F	Company	0.18%	151,306	$2,525,000	—	31 Dec 2020	13F
KENNEDY CAPITAL MANAGEMENT LLC	13F	Company	0.18%	148,014	$2,470,000	—	31 Dec 2020	13F
Global IMC LLC	13F	Company	0.16%	130,621	$2,180,000	—	31 Dec 2020	13F
PANAGORA ASSET MANAGEMENT INC	13F	Company	0.11%	94,251	$1,573,000	—	31 Dec 2020	13F
Nuveen Asset Management, LLC	13F	Company	0.1%	82,351	$1,374,000	—	31 Dec 2020	13F
GREENWOOD CAPITAL ASSOCIATES LLC	13F	Company	0.1%	80,750	$1,348,000	—	31 Dec 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.09%	77,805	$1,299,000	—	31 Dec 2020	13F
Bank of New York Mellon Corp	13F	Company	0.09%	76,503	$1,276,000	—	31 Dec 2020	13F
Trellus Management Company, LLC	13F	Company	0.09%	73,520	$1,227,000	—	31 Dec 2020	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.08%	63,500	$1,060,000	—	31 Dec 2020	13F
JPMORGAN CHASE & CO	13F	Company	0.07%	56,880	$950,000	—	31 Dec 2020	13F
MORGAN STANLEY	13F	Company	0.07%	54,168	$904,000	—	31 Dec 2020	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.06%	48,973	$818,000	—	31 Dec 2020	13F
UBS Group AG	13F	Company	0.06%	48,912	$817,000	—	31 Dec 2020	13F
Garrison Asset Management, LLC	13F	Company	0.01%	5,662	$737,000	—	31 Dec 2020	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.05%	41,582	$694,000	—	31 Dec 2020	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.05%	38,014	$634,000	—	31 Dec 2020	13F
Firsthand Capital Management, Inc.	13F	Company	0.04%	35,000	$584,000	—	31 Dec 2020	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.04%	30,828	$515,000	—	31 Dec 2020	13F
GSA CAPITAL PARTNERS LLP	13F	Company	0.04%	29,023	$484,000	—	31 Dec 2020	13F
RHUMBLINE ADVISERS	13F	Company	0.03%	26,571	$443,000	—	31 Dec 2020	13F
CITADEL ADVISORS LLC	13F	Company	0.03%	22,795	$380,000	—	31 Dec 2020	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.02%	18,700	$312,000	—	31 Dec 2020	13F
Quinn Opportunity Partners LLC	13F	Company	0.02%	18,036	$301,000	—	31 Dec 2020	13F
IEQ CAPITAL, LLC	13F	Company	0.02%	15,439	$258,000	—	31 Dec 2020	13F
DEUTSCHE BANK AG\	13F	Company	0.02%	14,531	$243,000	—	31 Dec 2020	13F
BARCLAYS PLC	13F	Company	0.02%	14,324	$239,000	—	31 Dec 2020	13F

Institutional Holders of ASPEN AEROGELS INC - Common Stock (ASPN) as of Q1 2021

As of 31 Mar 2021, ASPEN AEROGELS INC - Common Stock (ASPN) was held by 83 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 23,708,215 shares. The largest 10 holders included GEORGE KAISER FAMILY FOUNDATION, Oaktop Capital Management II, L.P., Telemark Asset Management, LLC, BlackRock Inc., VANGUARD GROUP INC, NEEDHAM INVESTMENT MANAGEMENT LLC, DRIEHAUS CAPITAL MANAGEMENT LLC, NEXT CENTURY GROWTH INVESTORS LLC, AIGH Capital Management LLC, and PRICE T ROWE ASSOCIATES INC /MD/. This page lists 83 institutional shareholders reporting positions in this security for the Q1 2021 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q1 2021 vs Q4 2020 Across Filers

Q4 2020 holders

Q1 2021 holders

Holder diff

Investor	Q4 2020 Shares	Q1 2021 Shares	Share Diff	Share Chg %	Q4 2020 Value $	Q1 2021 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.