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 2017?

42 institutional investors reported ASPN - ASPEN AEROGELS INC - Common Stock for Q1 2017. Use the holders table for investor-level position and value details.

ASPEN AEROGELS INC - Common Stock (ASPN)

CUSIP: 04523Y105

Q1 2017 13F Holders as of 31 Mar 2017

Type / Class: Equity / Common Stock
Shares outstanding: 82,107,547
Total 13F shares: 17,469,551
Share change: +1,386,364
Total reported value: $72,498,000
Price per share: $4.15
Number of holders: 42
Value change: +$5,754,386
Number of buys: 20
Number of sells: 14

Quarterly Holders Quick Answers

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

Need full ownership history?
Open the full security ownership history page.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q2 2017
Previous quarter: Q4 2016

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	$13,081,000	—	31 Dec 2016	13F
Reservoir Operations, L.P.	13F	Company	3.6%	2,916,103	$12,044,000	—	31 Dec 2016	13F
ARIEL INVESTMENTS, LLC	13F	Company	2%	1,655,326	$6,836,000	—	31 Dec 2016	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	1.1%	916,900	$3,787,000	—	31 Dec 2016	13F
OAKTOP CAPITAL MANAGEMENT II, L.P.	13F	Company	1.1%	888,600	$3,670,000	—	31 Dec 2016	13F
AMERIPRISE FINANCIAL INC	13F	Company	1.1%	884,075	$3,651,000	—	31 Dec 2016	13F
HEARTLAND ADVISORS INC	13F	Company	1%	850,000	$3,511,000	—	31 Dec 2016	13F
TOCQUEVILLE ASSET MANAGEMENT L.P.	13F	Company	1%	836,655	$3,455,000	—	31 Dec 2016	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	0.77%	636,206	$2,628,000	—	31 Dec 2016	13F
Telemark Asset Management, LLC	13F	Company	0.74%	611,500	$2,525,000	—	31 Dec 2016	13F
VANGUARD GROUP INC	13F	Company	0.69%	565,747	$2,337,000	—	31 Dec 2016	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.37%	305,000	$1,260,000	—	31 Dec 2016	13F
ROYCE & ASSOCIATES LP	13F	Company	0.36%	296,527	$1,225,000	—	31 Dec 2016	13F
WALL STREET ASSOCIATES	13F	Company	0.33%	274,770	$1,135,000	—	31 Dec 2016	13F
NEEDHAM INVESTMENT MANAGEMENT LLC	13F	Company	0.32%	265,000	$1,095,000	—	31 Dec 2016	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.32%	260,463	$1,076,000	—	31 Dec 2016	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.28%	233,300	$964,000	—	31 Dec 2016	13F
Granite Investment Partners, LLC	13F	Company	0.25%	203,882	$842,000	—	31 Dec 2016	13F
BRIDGEWAY CAPITAL MANAGEMENT, LLC	13F	Company	0.25%	202,130	$835,000	—	31 Dec 2016	13F
Harvey Partners, LLC	13F	Company	0.24%	200,000	$826,000	—	31 Dec 2016	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.19%	156,000	$645,000	—	31 Dec 2016	13F
PERRITT CAPITAL MANAGEMENT INC	13F	Company	0.15%	126,169	$521,000	—	31 Dec 2016	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.12%	94,870	$391,000	—	31 Dec 2016	13F
MORGAN STANLEY	13F	Company	0.1%	84,482	$349,000	—	31 Dec 2016	13F
BLACKROCK ADVISORS LLC	13F	Company	0.09%	76,976	$318,000	—	31 Dec 2016	13F
MESIROW FINANCIAL INVESTMENT MANAGEMENT - Fixed Income	13F	Company	0.07%	56,097	$232,000	—	31 Dec 2016	13F
BlackRock Group LTD	13F	Company	0.06%	46,838	$193,000	—	31 Dec 2016	13F
BlackRock Fund Advisors	13F	Company	0.05%	44,500	$184,000	—	31 Dec 2016	13F
RBF Capital, LLC	13F	Company	0.05%	41,111	$179,000	—	31 Dec 2016	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.04%	35,746	$148,000	—	31 Dec 2016	13F
Firsthand Capital Management, Inc.	13F	Company	0.04%	35,000	$140,000	—	31 Dec 2016	13F
Bank of New York Mellon Corp	13F	Company	0.03%	27,957	$115,000	—	31 Dec 2016	13F
TFS CAPITAL LLC	13F	Company	0.03%	24,060	$99,000	—	31 Dec 2016	13F
NORTHERN TRUST CORP	13F	Company	0.03%	23,737	$98,000	—	31 Dec 2016	13F
DEUTSCHE BANK AG\	13F	Company	0.02%	15,742	$65,000	—	31 Dec 2016	13F
J.P. Morgan Private Wealth Advisors LLC	13F	Company	0.02%	15,439	$64,000	—	31 Dec 2016	13F
EMERALD ADVISERS, LLC	13F	Company	0.02%	12,882	$53,000	—	31 Dec 2016	13F
PARSONS CAPITAL MANAGEMENT INC/RI	13F	Company	0.01%	11,500	$47,000	—	31 Dec 2016	13F
Spark Investment Management LLC	13F	Company	0.01%	10,700	$44,000	—	31 Dec 2016	13F
Virtu KCG Holdings LLC	13F	Company	0.01%	10,490	$43,000	—	31 Dec 2016	13F
QUANTUM CAPITAL MANAGEMENT	13F	Company	0.01%	10,470	$43,000	—	31 Dec 2016	13F
Brandywine Global Investment Management, LLC	13F	Company	0.01%	8,740	$37,000	—	31 Dec 2016	13F
Russell Investments Group, Ltd.	13F	Company	0.01%	5,800	$23,000	—	31 Dec 2016	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.01%	5,442	$22,000	—	31 Dec 2016	13F
Nationwide Fund Advisors	13F	Company	0.01%	5,300	$22,000	—	31 Dec 2016	13F
UBS Group AG	13F	Company	0%	3,285	$14,000	—	31 Dec 2016	13F
BlackRock Investment Management, LLC	13F	Company	0%	2,925	$12,000	—	31 Dec 2016	13F
BlackRock Finance, Inc.	13F	Company	0%	1,648	$7,000	—	31 Dec 2016	13F
Tower Research Capital LLC (TRC)	13F	Company	0%	1,090	$5,000	—	31 Dec 2016	13F
Advisor Group, Inc.	13F	Company	0%	500	$2,000	—	31 Dec 2016	13F

Institutional Holders of ASPEN AEROGELS INC - Common Stock (ASPN) as of Q1 2017

As of 31 Mar 2017, ASPEN AEROGELS INC - Common Stock (ASPN) was held by 42 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 17,469,551 shares. The largest 10 holders included GEORGE KAISER FAMILY FOUNDATION, Reservoir Operations, L.P., ARIEL INVESTMENTS, LLC, Oaktop Capital Management II, L.P., AMERIPRISE FINANCIAL INC, HEARTLAND ADVISORS INC, WELLINGTON MANAGEMENT GROUP LLP, TOCQUEVILLE ASSET MANAGEMENT L.P., Telemark Asset Management, LLC, and VANGUARD GROUP INC. This page lists 42 institutional shareholders reporting positions in this security for the Q1 2017 filing period.

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

Compare Q1 2017 vs Q4 2016 Across Filers

Q4 2016 holders

Q1 2017 holders

Holder diff

-9

Investor	Q4 2016 Shares	Q1 2017 Shares	Share Diff	Share Chg %	Q4 2016 Value $	Q1 2017 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.