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Disclosery

ASPN ASPEN AEROGELS INC

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COMMON STOCK (common), issuer CIK 1145986

177 managers (180 13F filers) reported a position in ASPN shares at 2026-06-30, 73,421,942 shares in all. 38 filers opened a position and 21 filers sold out during the quarter.

Managers
177
13F filers
180
New
38
Added
61
Reduced
46
Sold out
21
Shares held by filers
73,421,942

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, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, 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$77.9M10.59%013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.5,277,148$33.5M<0.01%+534,07213F-HRTimelineGroup
OAKTOP CAPITAL MANAGEMENT II, L.P.5,168,674$32.8M1.39%013F-HRTimeline
VANGUARD GROUP INCgroup of 4 filers holding4,741,228$30.1M+105,357Timeline
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…3,260,800$20.7M0.62%-1,257,97513F-HRTimelineGroup
George Kaiser Family Foundation3,167,322$20.1M1.93%013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP2,559,495$16.2M<0.01%+238,76813F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC2,510,042$15.9M0.01%+1,262,25913F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC2,058,083$13M0.05%+839,30413F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC1,821,295$11.5M<0.01%+314,91613F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,770,425$11.2M<0.01%+229,65413F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC1,635,259$10.4M0.5%+82,63113F-HRTimeline
Invesco Ltd.in group Invesco Ltd.1,619,972$10.3M<0.01%-678,21113F-HRTimelineGroup
GAGNON SECURITIES LLCin group GAGNON SECURITIES LLC1,535,812$9.74M1.88%-326,03913F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,447,333$9.17M<0.01%+190,85313F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,372,300$8.7M<0.01%+472,78713F-HRTimelineGroup
ROYCE & ASSOCIATES LP1,323,218$8.39M0.07%+336,70513F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC1,276,346$8.09M<0.01%+750,22713F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC1,190,616$7.55M0.01%-214,05913F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,146,707$7.27M0.01%-116,39513F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.1,066,501$6.76M<0.01%+232,92913F-HRTimelineGroup
Telemark Asset Management, LLC1,000,000$6.34M0.46%013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,004,383$6.01M<0.01%+38,89113F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS867,199$5.5M<0.01%+169,26713F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP779,468$4.94M<0.01%+338,03213F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC684,915$4.34M0.01%new13F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.596,883$3.78M0.01%+146,84713F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co570,712$3.62M<0.01%+13,98713F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL567,384$3.6M0.01%+416,29113F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP565,569$3.59M<0.01%+42,14713F-HRTimelineGroup
PANAGORA ASSET MANAGEMENT INC442,448$2.81M0.01%+414,54513F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY397,075$2.52M<0.01%+208,76913F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\372,077$2.36M<0.01%+12,54213F-HRTimelineGroup
Baird Financial Group, Inc.in group Baird Financial Group, Inc.345,193$2.19M<0.01%new13F-HRTimelineGroup
ALGERT GLOBAL LLC302,582$1.92M0.02%-23,82813F-HRTimeline
Trexquant Investment LP302,439$1.92M0.01%new13F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC274,392$1.74M<0.01%new13F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/252,746$1.6M<0.01%+11,72613F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC238,731$1.51M<0.01%-342,45613F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC229,935$1.46M<0.01%+219,78013F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd227,977$1.45M0.02%+26,61013F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP222,352$1.41M<0.01%+41,11813F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp195,389$1.24M<0.01%+9,71613F-HRTimelineGroup
Palogic Value Management, L.P.185,589$1.18M0.42%-264,41113F-HRTimeline
CITIGROUP INCin group CITIGROUP INC181,651$1.15M<0.01%-52,01413F-HRTimelineGroup
IRONWOOD INVESTMENT MANAGEMENT LLC179,301$1.14M0.39%+12,65513F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…177,419$1.12M<0.01%-96,89813F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …171,150$1.09M<0.01%new13F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC168,865$1.07M0.01%new13F-HRTimelineGroup
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…157,400$998K<0.01%013F-HRTimeline
Nuveen, LLCin group TIAA145,324$921K<0.01%+10,65713F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/130,300$827K<0.01%+23,00013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…128,107$812K<0.01%+65,40713F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.126,303$801K0.01%new13F-HRTimelineGroup
Firsthand Capital Management, Inc.125,000$792K1.27%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…120,306$763K<0.01%+5,92013F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC110,000$697K0.01%+35,00013F-HRTimeline
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…107,505$682K<0.01%-19,97513F-HRTimelineGroup
Sargent Investment Group, LLC106,432$675K0.08%-10,02513F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC106,330$674K0.03%-44,67413F-HRTimelineGroup
IEQ CAPITAL, LLC103,313$655K<0.01%new13F-HRTimeline
RBF Capital, LLC100,000$634K0.03%013F-HRTimeline
Man Group plcin group Man Group plc90,259$572K<0.01%-53,06313F-HRTimelineGroup
RHUMBLINE ADVISERS83,335$528K<0.01%-66413F-HRTimeline
LPL Financial LLC69,365$440K<0.01%+30,51613F-HRTimeline
FMR LLCin group FMR LLC68,476$434K<0.01%+63,99713F-HRTimelineGroup
EntryPoint Capital, LLC67,794$430K0.1%-78,87913F-HRTimeline
UBS Group AGin group UBS Group AG66,671$423K<0.01%-122,55813F-HRTimelineGroup
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …64,430$408K<0.01%-11,85413F-HRTimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd61,200$388K0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN59,370$376K<0.01%+30,78713F-HRTimelineGroup
Centiva Capital, LP56,459$358K0.01%new13F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources47,907$304K<0.01%-15,13013F-HRTimelineGroup
Graham Capital Management, L.P.46,267$293K0.01%-6,16013F-HRTimeline
Arax Advisory Partners46,153$293K<0.01%new13F-HRTimeline
Quantbot Technologies LP45,432$288K0.01%+40,90913F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management43,717$277K<0.01%-105,65613F-HRTimelineGroup
Mariner, LLCin group Mariner, LLC42,652$270K<0.01%new13F-HRTimelineGroup
Odyssean, LLC41,759$265K0.04%013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…40,269$255K<0.01%+25,15113F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.74,130$254K<0.01%+10,04013F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV38,679$245K<0.01%new13F-HR/ATimeline
State of Wyoming38,000$241K0.02%new13F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.37,919$240K0.04%new13F-HRTimeline
Y-Intercept (Hong Kong) Ltd36,820$233K<0.01%new13F-HRTimeline
Dynamic Technology Lab Private Ltd35,103$223K0.05%-86,59113F-HRTimeline
SG Americas Securities, LLC34,349$218K<0.01%new13F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD33,247$211K<0.01%-69,42913F-HRTimeline
DIVERSIFIED TRUST CO33,047$210K<0.01%new13F-HRTimeline
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…32,050$203K<0.01%+2,00013F-HRTimelineGroup
Creative Planningin group Creative Planning31,432$199K<0.01%new13F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…31,271$198K<0.01%-27613F-HRTimelineGroup
BAILARD, INC.29,508$187K<0.01%new13F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC28,365$180K<0.01%+18,21413F-HRTimelineGroup
Headlands Technologies LLC27,413$174K0.02%new13F-HRTimeline
nVerses Capital, LLC25,234$160K0.25%-15,31213F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…30,386$157K<0.01%+19,36013F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC21,535$137K<0.01%+2,95513F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD20,700$131K<0.01%-3,10013F-HRTimeline
CAPTRUST FINANCIAL ADVISORS19,187$122K<0.01%new13F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd19,169$122K<0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …19,056$121K<0.01%+75813F-HRTimelineGroup
WJ Financial Advisors LLC17,400$110K0.08%-46,54513F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/17,300$110K<0.01%+1,89713F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC16,955$107K<0.01%-1,49213F-HRTimelineGroup
Police & Firemen's Retirement System of…16,663$106K<0.01%013F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC16,460$104K<0.01%-43,29213F-HRTimelineGroup
Aquatic Capital Management LLC16,403$104K<0.01%+13,30613F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND16,231$103K<0.01%013F-HRTimeline
SIMPLEX TRADING, LLC15,952$101K<0.01%+13,57813F-HRTimeline
Legato Capital Management LLC15,562$98.7K0.01%013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…14,618$92.7K<0.01%013F-HRTimeline
Olympiad Research LP13,949$88.4K0.18%new13F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC13,911$88.2K0.01%new13F-HRTimeline
Equitable Holdings, Inc.in group Equitable Holdings, Inc.13,830$87.7K<0.01%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC13,769$87.3K<0.01%+2,15613F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC13,846$86.4K<0.01%-91,13613F-HRTimelineGroup
BRIGHTON JONES LLC12,792$81.1K<0.01%new13F-HRTimeline
R Squared Ltd11,957$75.8K0.04%new13F-HRTimeline
Pallas Capital Advisors LLC10,900$69.1K<0.01%new13F-HRTimeline
Quantinno Capital Management LP10,334$65.5K<0.01%new13F-HRTimeline
Choate Investment Advisors10,000$63.4K<0.01%013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.9,588$60.8K<0.01%-10,02113F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.9,006$57.1K<0.01%-247,60813F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc6,915$43.9K<0.01%+88013F-HRTimelineGroup
Strategic Investment Solutions, Inc. /IL6,010$38.1K0.01%013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…5,708$36.2K<0.01%013F-HRTimelineGroup
IFP Advisors, Inc5,561$35.3K<0.01%-3,33613F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…5,471$34.7K<0.01%+2,11513F-HRTimelineGroup
Caitong International Asset Management …4,467$28.3K<0.01%+4,14413F-HRTimeline
First PREMIER Bank4,000$25K<0.01%013F-HRTimeline
State of Alaska, Department of Revenue3,385$21K<0.01%013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.3,170$20.1K<0.01%-1,03713F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA3,159$20K<0.01%-5,36413F-HRTimelineGroup
Allworth Financial LP3,133$19.9K<0.01%+2,01813F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…2,407$15.3K<0.01%+94313F-HRTimelineGroup
BOKF, NAin group BOKF, NA2,000$12.7K<0.01%013F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…1,646$10.4K<0.01%+1,44613F-HRTimelineGroup
Essential Partners LLC1,629$10.3K<0.01%-5,09313F-HRTimeline
SBI Securities Co., Ltd.1,521$9.64K<0.01%-2,83913F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\1,433$9.09K<0.01%+74313F-HRTimelineGroup
Covestor Ltd1,523$9K0.01%-94613F-HRTimeline
Sterling Capital Management LLC1,369$8.68K<0.01%-82613F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,500$8.45K<0.01%-12013F-HRTimelineGroup
Integrated Wealth Concepts LLC1,113$7.06K<0.01%new13F-HRTimeline
GGM Financial LLC1,010$6.4K<0.01%013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…929$5.89K<0.01%-2,65913F-HR/ATimeline
Larson Financial Group LLC904$5.73K<0.01%013F-HRTimeline
PlanVest Financial, Inc886$5.62K<0.01%013F-HRTimeline
STANCE CAPITAL LLC811$5.14K<0.01%013F-HRTimeline
Performa Ltd (US), LLC800$5.07K<0.01%new13F-HRTimeline
Cornerstone Planning Group LLC750$3.98K<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC574$3.64K<0.01%+29913F-HRTimeline
GAMMA Investing LLC519$3.29K<0.01%013F-HRTimeline
Stone House Investment Management, LLC405$2.57K<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC325$2.06K<0.01%-12513F-HRTimeline
Minot DeBlois Advisors LLC300$1.9K<0.01%013F-HRTimeline
HighMark Wealth Management LLC250$1.58K<0.01%013F-HRTimeline
Basecamp Wealth Advisors LLC225$1.43K<0.01%+13513F-HRTimeline
SJS Investment Consulting Inc.188$1.19K<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…185$1.17K<0.01%+713F-HRTimelineGroup
Morse Asset Management, Inc175$1.11K<0.01%013F-HRTimeline
Clearstead Advisors, LLC160$1.01K<0.01%new13F-HRTimeline
Strategic Wealth Partners, Ltd.156$989<0.01%013F-HRTimeline
Fortitude Family Office, LLC126$799<0.01%new13F-HRTimeline
Farther Finance Advisors, LLC100$624<0.01%+3913F-HRTimeline
Smartleaf Asset Management LLC85$508<0.01%013F-HRTimeline
Wealth Enhancement Trust Services, Inc.58$368<0.01%new13F-HR/ATimeline
Pinnacle Wealth Planning Services, Inc.51$323<0.01%-613F-HRTimeline
Colonial Trust Advisorsin group Colonial Trust Advisors50$317<0.01%013F-HRTimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…28$175<0.01%-2813F-HRTimelineGroup
Asset Planning,Inc25$159<0.01%013F-HRTimeline
JPL Wealth Management, LLC23$146<0.01%new13F-HRTimeline
TD Waterhouse Canada Inc.15$89<0.01%013F-HRTimeline
True Wealth Design, LLC14$89<0.01%-613F-HRTimeline
HARBOUR INVESTMENTS, INC.4$25<0.01%013F-HRTimeline
Silver Grove Financial Group, Inc.4$25<0.01%new13F-HRTimeline