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Disclosery

ASPN ASPEN AEROGELS INC

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COMMON STOCK (common), issuer CIK 1145986

201 managers (204 13F filers) reported a position in ASPN shares at 2025-09-30, 71,367,747 shares in all. 51 filers opened a position and 28 filers sold out during the quarter.

Managers
201
13F filers
204
New
51
Added
63
Reduced
55
Sold out
28
Shares held by filers
71,367,747

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
KIM, LLC12,280,426$85.5M9.62%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.4,977,558$34.6M<0.01%+37213F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC4,510,370$31.4M<0.01%+22,68613F-HRTimelineGroup
OAKTOP CAPITAL MANAGEMENT II, L.P.4,394,525$30.6M2.77%013F-HRTimeline
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…3,439,700$23.9M1.67%+425,50013F-HRTimelineGroup
George Kaiser Family Foundation3,167,322$22M3.09%013F-HRTimeline
GAGNON SECURITIES LLCgroup of 2 filers holding2,320,403$16.2M-144,275Timeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP2,252,013$15.7M<0.01%-197,09013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP1,944,636$13.5M<0.01%+23,63913F-HRTimelineGroup
Telemark Asset Management, LLC1,792,424$12.5M1.18%013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,584,871$11M<0.01%+2,12913F-HRTimelineGroup
AWM Investment Company, Inc.1,555,477$10.8M1.01%+120,00013F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC1,447,517$10.1M0.01%+540,77213F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,419,804$9.88M<0.01%-782,09613F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC1,407,726$9.8M0.53%-136,68913F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,349,749$9.39M<0.01%+103,24313F-HR/ATimelineGroup
Invesco Ltd.in group Invesco Ltd.1,222,376$8.51M<0.01%+390,38513F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC1,114,590$7.76M0.01%+951,55813F-HRTimelineGroup
Penn Capital Management Company, LLC1,036,995$7.23M0.56%+291,11813F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding916,028$6.38M+104,821Timeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/814,849$5.67M<0.01%-3,36313F-HR/ATimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND720,024$5.01M0.01%+225,56213F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY694,488$4.83M<0.01%-11,51113F-HR/ATimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS692,148$4.82M<0.01%+281,08213F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP613,598$4.27M<0.01%+9,93813F-HRTimelineGroup
PEREGRINE INVESTMENT MANAGEMENT INC600,000$4.18M2.05%new13F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co572,588$3.99M<0.01%+26,74513F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC538,300$3.75M0.05%+421,90013F-HR/ATimelineGroup
First Eagle Investment Management, LLCin group First Eagle Investment Manage…517,323$3.6M0.01%new13F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding491,398$3.42M+35,260Timeline
TUDOR INVESTMENT CORP ET AL486,596$3.39M0.02%new13F-HR/ATimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC471,312$3.28M<0.01%+456,26813F-HRTimelineGroup
ESSEX INVESTMENT MANAGEMENT CO LLC390,033$2.71M0.42%-36,49513F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA387,034$2.69M<0.01%+8,51813F-HRTimelineGroup
Baird Financial Group, Inc.in group Baird Financial Group, Inc.364,423$2.54M<0.01%-35,31713F-HRTimelineGroup
Samjo Management, LLC340,825$2.37M0.91%-2,80013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP312,190$2.17M<0.01%-91,81613F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.289,931$2.02M<0.01%-1,476,80213F-HRTimelineGroup
Trexquant Investment LP260,157$1.81M0.02%-388,88113F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD256,790$1.79M<0.01%-25,83313F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC246,900$1.72M<0.01%-432,30013F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\220,213$1.53M<0.01%+5,19513F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp214,948$1.5M<0.01%+13,95813F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC210,545$1.47M<0.01%-92,27213F-HRTimelineGroup
Palogic Value Management, L.P.200,000$1.39M0.59%-410,00013F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP195,968$1.36M<0.01%-9,59513F-HRTimelineGroup
Sargent Investment Group, LLC189,227$1.32M0.19%-16,47013F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.184,300$1.28M<0.01%new13F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC177,805$1.24M<0.01%-12,02613F-HRTimelineGroup
Cubist Systematic Strategies, LLC176,010$1.23M0.02%+80,25213F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…168,847$1.18M<0.01%-110,14013F-HRTimelineGroup
HRT FINANCIAL LP167,423$1.17M<0.01%-428,31913F-HRTimeline
CastleKnight Management LP162,599$1.13M0.06%-192,80013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC161,125$1.12M<0.01%+76,24513F-HRTimelineGroup
Quantbot Technologies LP158,583$1.1M0.03%new13F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC139,213$969K<0.01%new13F-HRTimeline
Voleon Capital Management LP138,538$964K0.02%-110,30113F-HRTimeline
Swiss National Bank135,200$941K<0.01%013F-HRTimeline
IRONWOOD INVESTMENT MANAGEMENT LLC134,362$935K0.41%+10,03813F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…134,247$934K<0.01%+57,29713F-HRTimelineGroup
Nuveen, LLCin group TIAA133,867$932K<0.01%013F-HRTimelineGroup
Qube Research & Technologies Ltd126,275$879K<0.01%-129,31913F-HRTimeline
Firsthand Capital Management, Inc.125,000$870K1.46%013F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC123,677$861K<0.01%-15,48513F-HRTimelineGroup
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …121,826$848K0.01%+102,04713F-HRTimelineGroup
ExodusPoint Capital Management, LP116,422$810K0.01%new13F-HRTimeline
LPL Financial LLC110,857$772K<0.01%+67,07313F-HRTimeline
RHUMBLINE ADVISERS110,732$771K<0.01%-2,77413F-HRTimeline
Graham Capital Management, L.P.105,880$737K0.03%+93,25713F-HRTimeline
IMC-Chicago, LLC103,197$718K0.01%+16,01613F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC99,365$692K<0.01%-30,50213F-HR/ATimelineGroup
ALGERT GLOBAL LLC94,655$659K0.01%-95,67013F-HR/ATimeline
Legato Capital Management LLC93,806$653K0.07%+19113F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC90,850$632K<0.01%+22,68313F-HRTimelineGroup
Atom Investors LP82,648$575K0.04%new13F-HRTimeline
SG Americas Securities, LLC80,423$560K<0.01%-53,39813F-HRTimeline
Man Group plcin group Man Group plc80,197$558K<0.01%new13F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/76,626$534K<0.01%+5,74913F-HRTimeline
Counterpoint Mutual Funds LLC71,595$498K0.04%new13F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…70,177$488K<0.01%-9,00113F-HRTimelineGroup
Harbour Capital Advisors, LLC58,675$473K0.1%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc67,130$467K<0.01%013F-HRTimelineGroup
Inspire Investing, LLCin group Inspire Investing, LLC66,115$460K0.04%new13F-HRTimelineGroup
Verition Fund Management LLC65,962$459K<0.01%-29,16913F-HRTimeline
EntryPoint Capital, LLC65,173$454K0.18%-40,60613F-HRTimeline
ALLIANCEBERNSTEIN L.P.64,090$446K<0.01%-22,95013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…60,670$422K<0.01%+4,15113F-HRTimeline
ARS Investment Partners, LLC60,007$418K0.03%+3,50013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…55,400$386K0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN53,769$374K<0.01%+2,41213F-HRTimelineGroup
WOLVERINE TRADING, LLC49,356$349K0.01%new13F-HRTimeline
CAPITAL FUND MANAGEMENT S.A.49,750$346K<0.01%-20,29813F-HRTimeline
Perigon Wealth Management, LLC49,321$343K0.01%+11,45513F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources46,754$325K<0.01%+6,34113F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC44,964$313K<0.01%+6,24113F-HRTimeline
CONNORS INVESTOR SERVICES INC40,167$280K0.02%+5,00013F-HRTimeline
SANDERS MORRIS HARRIS LLC40,000$278K0.04%013F-HRTimeline
Versor Investments LP39,300$274K0.05%new13F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.36,181$252K0.04%new13F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …35,123$244K<0.01%-37,30513F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC34,787$242K<0.01%+8,22813F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…31,159$217K<0.01%-4,44913F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson30,455$212K<0.01%013F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…30,443$212K<0.01%-14,13413F-HRTimelineGroup
Caption Management, LLC30,000$209K0.01%-13,70013F-HRTimeline
Quantinno Capital Management LP23,269$162K<0.01%+5,33113F-HRTimeline
Entropy Technologies, LP23,221$162K0.01%new13F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd22,799$159K0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …22,718$158K<0.01%-1,95313F-HRTimelineGroup
Creative Planningin group Creative Planning21,948$153K<0.01%+6,62413F-HRTimelineGroup
Sender Co & Partners, Inc.21,588$150K0.06%new13F-HRTimeline
Police & Firemen's Retirement System of…21,109$147K<0.01%+8,19713F-HRTimeline
Janney Montgomery Scott LLC21,043$146K<0.01%-60,03913F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM20,668$144K<0.01%+30113F-HRTimeline
DGS Capital Management, LLCin group DGS Capital Management, LLC20,153$140K0.03%new13F-HRTimelineGroup
Numerai GP LLC18,280$127K0.02%new13F-HRTimeline
AlphaQuest LLC18,154$126K0.01%013F-HRTimeline
HUB Investment Partners, LLC16,940$118K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC16,251$113K<0.01%+15,19813F-HRTimeline
Compound Planning, Inc.15,003$104K<0.01%new13F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…14,618$102K<0.01%013F-HRTimeline
WOODMONT INVESTMENT COUNSEL LLC14,603$102K0.01%-10,90013F-HRTimeline
Penbrook Management LLC14,180$98.7K0.07%013F-HRTimeline
KLP KAPITALFORVALTNING AS13,800$96K<0.01%013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.13,527$95.1K<0.01%+2,91213F-HRTimelineGroup
CAXTON ASSOCIATES LLP13,654$95K<0.01%-89,51813F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.13,222$92K<0.01%-7,50013F-HRTimelineGroup
Point72 Asia (Singapore) Pte. Ltd.12,546$87.3K0.01%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC12,359$86K<0.01%-6,04013F-HRTimelineGroup
IFP Advisors, Inc12,032$83.7K<0.01%-8,71713F-HR/ATimeline
Probity Advisors, Inc.11,938$83.1K0.01%+1,27313F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC11,352$79K<0.01%new13F-HRTimeline
ProShare Advisors LLC11,338$78.9K<0.01%-2,25913F-HRTimeline
HighTower Advisors, LLC10,847$75.5K<0.01%new13F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…10,703$74.5K<0.01%013F-HRTimeline
OCCUDO QUANTITATIVE STRATEGIES LP10,398$72.4K0.01%new13F-HRTimeline
Arax Advisory Partners10,324$71.9K<0.01%+8,60113F-HRTimeline
OMERS ADMINISTRATION Corp10,300$71.7K<0.01%new13F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd10,210$71.1K<0.01%new13F-HRTimelineGroup
PRELUDE CAPITAL MANAGEMENT, LLC10,109$70.4K0.01%new13F-HRTimeline
Olympiad Research LP10,109$70.4K0.1%new13F-HRTimeline
Choate Investment Advisors10,000$69.6K<0.01%013F-HRTimeline
Cannell & Spears LLC10,000$69.6K<0.01%013F-HRTimeline
Banque Cantonale Vaudoisein group Banque Cantonale Vaudoise9,349$65K<0.01%+2,63613F-HRTimelineGroup
CWM, LLCin group CWM, LLC7,497$52K<0.01%-82113F-HRTimelineGroup
SBI Securities Co., Ltd.6,975$48.5K<0.01%+63213F-HRTimeline
FMR LLCin group FMR LLC6,663$46.4K<0.01%-162,54513F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…6,088$42K<0.01%013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…5,708$39.7K<0.01%013F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC4,866$33.9K<0.01%+7513F-HRTimeline
Sterling Capital Management LLC4,575$31.8K<0.01%+2,78513F-HRTimeline
First PREMIER Bank4,000$28K0.01%013F-HRTimeline
Point72 (DIFC) Ltd3,938$27.4K<0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,865$26.9K<0.01%-3,37013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\3,338$23.2K<0.01%+44713F-HRTimelineGroup
FNY Investment Advisers, LLC3,412$23K0.01%new13F-HRTimeline
State of Alaska, Department of Revenue3,385$23K<0.01%new13F-HRTimeline
STANCE CAPITAL LLC2,733$19K0.01%new13F-HRTimeline
MAI Capital Management2,651$18.5K<0.01%+1,00013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP2,545$18.1K<0.01%+65013F-HRTimelineGroup
AMALGAMATED BANK2,130$15K<0.01%013F-HRTimeline
BOKF, NAin group BOKF, NA2,000$13.9K<0.01%013F-HRTimelineGroup
Point72 Europe (London) LLP1,573$10.9K<0.01%new13F-HRTimeline
GAMMA Investing LLC1,489$10.4K<0.01%+39213F-HRTimeline
Wealthspire Advisors, LLC1,355$9.43K<0.01%new13F-HRTimeline
SIGNATUREFD, LLC1,337$9.31K<0.01%+36913F-HRTimeline
Versant Capital Management, Inc1,322$9.2K<0.01%013F-HRTimeline
Quarry LP1,149$8K<0.01%new13F-HRTimeline
GGM Financial LLC1,010$7.03K<0.01%new13F-HRTimeline
SUMMIT SECURITIES GROUP LLC975$6.79K<0.01%-4,74113F-HRTimeline
Allworth Financial LP849$5.91K<0.01%+3513F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.848$5.9K<0.01%new13F-HRTimelineGroup
HUNTINGTON NATIONAL BANKin group HUNTINGTON NATIONAL BANK735$5.12K<0.01%013F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …777$5K<0.01%013F-HRTimelineGroup
Morse Asset Management, Inc675$4.7K<0.01%-90013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…641$4.46K<0.01%013F-HRTimelineGroup
Strategic Wealth Partners, Ltd.594$4.13K<0.01%-1,75713F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/527$3.67K<0.01%new13F-HRTimelineGroup
Stephens Consulting, LLC486$3.38K<0.01%new13F-HRTimeline
Bogart Wealth, LLC375$2.61K<0.01%new13F-HRTimeline
Larson Financial Group LLC375$2.61K<0.01%-1,88413F-HRTimeline
Minot DeBlois Advisors LLC300$2.09K<0.01%013F-HRTimeline
HighMark Wealth Management LLC250$1.74K<0.01%013F-HRTimeline
Essential Partners LLC210$1.46K<0.01%-43013F-HRTimeline
ROTHSCHILD INVESTMENT LLC205$1.43K<0.01%+2013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…200$1.39K<0.01%new13F-HRTimelineGroup
Kilter Group LLC180$1.25K<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…157$1.09K<0.01%+3213F-HRTimelineGroup
TD PRIVATE CLIENT WEALTH LLC98$682<0.01%new13F-HRTimeline
COMERICA BANK93$644<0.01%013F-HRTimeline
Blue Trust, Inc.88$612<0.01%new13F-HRTimeline
Smartleaf Asset Management LLC85$601<0.01%new13F-HRTimeline
Cornerstone Planning Group LLC75$565<0.01%new13F-HRTimeline
Parkside Financial Bank & Trust80$557<0.01%013F-HRTimeline
Colonial Trust Advisorsin group Colonial Trust Advisors50$348<0.01%013F-HRTimelineGroup
Hughes Financial Services, LLC72$264<0.01%new13F-HRTimeline
Advisory Services Network, LLC25$174<0.01%new13F-HRTimeline
Asset Planning,Inc25$174<0.01%013F-HRTimeline
Clearstead Advisors, LLC20$140<0.01%+813F-HRTimeline
Farther Finance Advisors, LLC1$7<0.01%013F-HRTimeline