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Disclosery

ASPN ASPEN AEROGELS INC

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COMMON STOCK (common), issuer CIK 1145986

163 managers (166 13F filers) reported a position in ASPN shares at 2026-03-31, 69,302,692 shares in all. 29 filers opened a position and 49 filers sold out during the quarter.

Managers
163
13F filers
166
New
29
Added
44
Reduced
57
Sold out
49
Shares held by filers
69,302,692

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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$42M6.19%013F-HRTimeline
OAKTOP CAPITAL MANAGEMENT II, L.P.5,168,674$17.7M1.32%+774,14913F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.4,743,076$16.2M<0.01%-186,16313F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding4,635,871$15.9MnewTimeline
NEEDHAM INVESTMENT MANAGEMENT LLCin group NEEDHAM INVESTMENT MANAGEMENT…4,518,775$15.5M0.79%+167,07513F-HRTimelineGroup
George Kaiser Family Foundation3,167,322$10.8M1.23%013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP2,320,727$7.94M<0.01%-180,74213F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.2,298,183$7.86M<0.01%-1,831,75113F-HRTimelineGroup
GAGNON SECURITIES LLCin group GAGNON SECURITIES LLC1,861,851$6.37M1.47%+728,60313F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC1,552,628$5.31M0.3%+131,02313F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,540,771$5.27M<0.01%-61,27813F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC1,506,379$5.15M<0.01%+128,09513F-HR/ATimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC1,404,675$4.8M<0.01%+533,72413F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,263,102$4.32M<0.01%+708,92213F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,256,480$4.3M<0.01%-747,48313F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC1,247,783$4.27M<0.01%+89,80513F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC1,218,779$4.17M0.02%+1,078,66613F-HRTimeline
Telemark Asset Management, LLC1,000,000$3.42M0.32%013F-HRTimeline
ROYCE & ASSOCIATES LP986,513$3.37M0.03%new13F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC899,513$3.08M<0.01%-395,41513F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO965,492$3.06M<0.01%-518,25313F-HR/ATimelineGroup
HRT FINANCIAL LP870,435$2.98M0.01%new13F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.833,572$2.85M<0.01%+810,35513F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS697,932$2.39M<0.01%+6,66213F-HRTimelineGroup
Samjo Management, LLC645,625$2.21M0.95%-152,90013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC581,187$1.99M<0.01%-285,03113F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co556,725$1.9M<0.01%+16,40213F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC526,119$1.8M<0.01%+156,17013F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP523,422$1.79M<0.01%-15,74613F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.450,036$1.54M<0.01%-114,45013F-HRTimelineGroup
Palogic Value Management, L.P.450,000$1.54M0.67%-75,00013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP441,436$1.51M<0.01%-315,98313F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\359,535$1.23M<0.01%+136,44213F-HRTimelineGroup
ALGERT GLOBAL LLC326,410$1.12M0.02%+270,57513F-HR/ATimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…274,317$938K<0.01%+83,11313F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.256,614$878K<0.01%new13F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/241,020$824K<0.01%-511,41013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC233,665$799K<0.01%-4,96613F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd201,367$689K0.01%-66313F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding189,229$647K-220,708Timeline
MORGAN STANLEYin group MORGAN STANLEY188,306$644K<0.01%-159,34213F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC187,860$642K<0.01%-105,29013F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp185,673$635K<0.01%-11,23013F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP181,234$620K<0.01%-15,33213F-HRTimelineGroup
IRONWOOD INVESTMENT MANAGEMENT LLC166,646$570K0.24%+39,18613F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…157,400$538K<0.01%013F-HRTimeline
TUDOR INVESTMENT CORP ET AL151,093$517K<0.01%+71,92213F-HRTimeline
Inspire Investing, LLCin group Inspire Investing, LLC151,004$516K0.03%-15,87013F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management149,373$511K<0.01%new13F-HRTimelineGroup
Engineers Gate Manager LP148,159$507K0.01%+28,93213F-HRTimeline
EntryPoint Capital, LLC146,673$502K0.15%+36,53113F-HRTimeline
Man Group plcin group Man Group plc143,322$490K<0.01%new13F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC141,745$485K<0.01%new13F-HRTimelineGroup
Nuveen, LLCin group TIAA134,667$461K<0.01%+80013F-HRTimelineGroup
Mitsubishi UFJ Asset Management Co., Lt…in group Mitsubishi UFJ Trust & Bankin…127,480$436K<0.01%-3,98813F-HRTimelineGroup
Firsthand Capital Management, Inc.125,000$428K0.91%013F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC124,353$425K<0.01%+7,98113F-HRTimelineGroup
Dynamic Technology Lab Private Ltd121,694$416K0.07%+18,41313F-HRTimeline
Sargent Investment Group, LLC116,457$398K0.05%-25,15013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…114,386$391K<0.01%+18,73513F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/107,300$367K<0.01%+9,00113F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC104,982$359K<0.01%+81,65613F-HRTimelineGroup
STATE OF WISCONSIN INVESTMENT BOARD102,676$351K<0.01%-17,56213F-HRTimeline
RBF Capital, LLC100,000$342K0.02%013F-HR/ATimeline
Numerai GP LLC95,900$328K0.03%-155,98813F-HRTimeline
RHUMBLINE ADVISERS83,999$287K<0.01%-5,31913F-HRTimeline
OPPENHEIMER & CO INCin group OPPENHEIMER ASSET MANAGEMENT …76,284$261K<0.01%-73713F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC75,000$256K0.01%new13F-HRTimeline
WJ Financial Advisors LLC63,945$219K0.18%-87013F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources63,037$216K<0.01%new13F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…62,700$214K<0.01%new13F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC59,752$204K<0.01%new13F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.64,090$181K<0.01%013F-HRTimeline
Graham Capital Management, L.P.52,427$179K0.01%-106,41213F-HRTimeline
Odyssean, LLC41,759$143K0.05%013F-HRTimeline
nVerses Capital, LLC40,546$139K0.13%new13F-HRTimeline
LPL Financial LLC38,849$133K<0.01%-16,22713F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…31,547$108K<0.01%+74813F-HRTimelineGroup
Concurrent Investment Advisors, LLCin group Concurrent Investment Advisor…30,050$103K<0.01%+5013F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN28,583$97.8K<0.01%-53,58713F-HR/ATimelineGroup
PANAGORA ASSET MANAGEMENT INC27,903$95.4K<0.01%new13F-HRTimeline
AXQ CAPITAL, LP26,624$91.1K0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC24,626$84.2K<0.01%+22,86213F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD23,800$81.4K<0.01%+11,90013F-HRTimeline
IMC-Chicago, LLC22,470$76.8K<0.01%-80,46013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.19,609$67.1K<0.01%+8,81013F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC18,580$63.5K<0.01%-6,80213F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC18,447$63.1K<0.01%-91,08113F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …18,298$62.6K<0.01%-2,86513F-HRTimelineGroup
CHOREO, LLC17,250$59K<0.01%+42213F-HRTimeline
Police & Firemen's Retirement System of…16,663$57K<0.01%013F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND16,231$55.5K<0.01%013F-HRTimeline
Legato Capital Management LLC15,562$53.2K<0.01%013F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/15,403$52.7K<0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…15,118$51.7K<0.01%-12,03613F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…14,618$50K<0.01%013F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…11,026$40.7K<0.01%new13F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…11,619$39.7K<0.01%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC11,613$39.7K<0.01%-74613F-HRTimelineGroup
Aptus Capital Advisors, LLC10,537$36K<0.01%new13F-HRTimeline
Clarus Group, Inc.10,504$35.9K0.01%new13F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC10,155$34.7K<0.01%new13F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC10,151$34.7K<0.01%new13F-HRTimelineGroup
Choate Investment Advisors10,000$34.2K<0.01%013F-HRTimeline
Cannell & Spears LLC10,000$34.2K<0.01%013F-HR/ATimeline
IFP Advisors, Inc8,897$30.4K<0.01%-2,39413F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA8,523$29K<0.01%+4,16913F-HRTimelineGroup
Essential Partners LLC6,722$23K0.01%+6,66613F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc6,035$20.6K<0.01%-61,09513F-HRTimelineGroup
Strategic Investment Solutions, Inc. /IL6,010$20.6K<0.01%-1,00013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…5,708$19.5K<0.01%013F-HRTimelineGroup
MAI Capital Management4,843$16.6K<0.01%+1,19213F-HRTimeline
Quantbot Technologies LP4,523$15.5K<0.01%+3,92813F-HRTimeline
FMR LLCin group FMR LLC4,479$15.3K<0.01%-1,29013F-HRTimelineGroup
SBI Securities Co., Ltd.4,360$14.8K<0.01%-3,31113F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.4,207$14.4K<0.01%-1,83913F-HR/ATimelineGroup
Banque Cantonale Vaudoisein group Banque Cantonale Vaudoise4,154$14K<0.01%-2,20413F-HRTimelineGroup
First PREMIER Bank4,000$14K<0.01%013F-HRTimeline
Gunpowder Capital Management, LLC dba O…3,863$13.2K0.01%013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…3,588$12.3K<0.01%-74,86613F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…3,356$11.5K<0.01%-1,37713F-HRTimelineGroup
State of Alaska, Department of Revenue3,385$11K<0.01%013F-HRTimeline
Aquatic Capital Management LLC3,097$10.6K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC2,374$8.12K<0.01%-2,45813F-HRTimeline
Covestor Ltd2,469$8K0.01%+913F-HRTimeline
Sterling Capital Management LLC2,195$7.51K<0.01%-1,33813F-HRTimeline
BOKF, NAin group BOKF, NA2,000$6.84K<0.01%013F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,620$5.35K<0.01%-12513F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1,464$5.01K<0.01%new13F-HR/ATimelineGroup
Rachor Investment Advisory Services, LLC1,177$4.03K<0.01%+48713F-HRTimeline
Allworth Financial LP1,115$3.81K<0.01%+69613F-HRTimeline
GGM Financial LLC1,010$3.45K<0.01%013F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/1,000$3.42K<0.01%+80013F-HRTimelineGroup
Cornerstone Planning Group LLC750$3.1K<0.01%013F-HRTimeline
Larson Financial Group LLC904$3.09K<0.01%-16013F-HRTimeline
PlanVest Financial, Inc886$3.03K<0.01%13F-HRTimeline
STANCE CAPITAL LLC811$2.77K<0.01%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\690$2.36K<0.01%-4913F-HRTimelineGroup
GAMMA Investing LLC519$1.77K<0.01%-41713F-HRTimeline
NISA INVESTMENT ADVISORS, LLC450$1.54K<0.01%new13F-HRTimeline
Stone House Investment Management, LLC405$1.39K<0.01%013F-HRTimeline
Caitong International Asset Management …323$1.1K<0.01%-10,26313F-HRTimeline
Minot DeBlois Advisors LLC300$1.03K<0.01%013F-HRTimeline
ROTHSCHILD INVESTMENT LLC275$941<0.01%+22013F-HRTimeline
HighMark Wealth Management LLC250$855<0.01%013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…200$684<0.01%013F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…178$609<0.01%+12213F-HRTimelineGroup
Morse Asset Management, Inc175$599<0.01%013F-HRTimeline
Strategic Wealth Partners, Ltd.156$534<0.01%013F-HRTimeline
Wealth Preservation Advisors, LLC127$434<0.01%new13F-HRTimeline
Sunbelt Securities, Inc.119$407<0.01%+5613F-HRTimeline
Basecamp Wealth Advisors LLC90$308<0.01%-1813F-HRTimeline
Parkside Financial Bank & Trust80$274<0.01%013F-HRTimeline
Smartleaf Asset Management LLC85$269<0.01%013F-HRTimeline
Farther Finance Advisors, LLC61$212<0.01%-1913F-HRTimeline
Pinnacle Wealth Planning Services, Inc.57$195<0.01%new13F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…56$190<0.01%new13F-HRTimelineGroup
Colonial Trust Advisorsin group Colonial Trust Advisors50$171<0.01%013F-HRTimelineGroup
Quaker Wealth Management, LLC33$113<0.01%-8,43913F-HRTimeline
Asset Planning,Inc25$86<0.01%013F-HRTimeline
True Wealth Design, LLC20$69<0.01%+213F-HRTimeline
TD Waterhouse Canada Inc.15$52<0.01%new13F-HRTimeline
HARBOUR INVESTMENTS, INC.4$14<0.01%new13F-HRTimeline