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Disclosery

ASPI ASP ISOTOPES INC

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COM (common), issuer CIK 1921865

158 managers (158 13F filers) reported a position in ASPI shares at 2025-09-30, 52,919,308 shares in all. 44 filers opened a position and 16 filers sold out during the quarter.

Managers
158
13F filers
158
New
44
Added
69
Reduced
33
Sold out
16
Shares held by filers
52,919,308

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
BlackRock, Inc.in group BlackRock, Inc.5,460,992$52.5M<0.01%+1,432,27713F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC4,516,763$43.5M<0.01%+1,241,02413F-HRTimelineGroup
Rovida Investment Management Ltd3,200,000$30.7M3.48%+1,000,00013F-HRTimeline
AWM Investment Company, Inc.2,958,596$28.5M2.67%-972,59013F-HRTimeline
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.2,822,695$27.2M0.08%-1,357,23913F-HRTimelineGroup
Capital Research Global Investorsin group Capital Research Global Inves…2,043,567$19.7M<0.01%-824,49513F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,862,455$17.9M<0.01%+514,38313F-HRTimelineGroup
Philadelphia Financial Management of Sa…1,661,494$16M3.2%-1,008,71713F-HRTimeline
Driehaus Capital Management LLC1,419,837$13.7M0.1%+14,42313F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,405,732$13.5M<0.01%+291,53213F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…1,341,783$12.9M0.02%+1,239,49213F-HRTimelineGroup
Telemark Asset Management, LLC1,325,000$12.7M1.21%-100,00013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP1,279,121$12.3M0.01%+1,245,18413F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC1,218,717$11.7M0.01%+1,069,28313F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC1,206,280$11.6M0.11%-97,13413F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC1,165,765$11.2M0.01%+1,020,56213F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/1,047,758$10.1M<0.01%+1,021,16113F-HRTimeline
UBS Group AGin group UBS Group AG961,292$9.25M<0.01%-466,98413F-HRTimelineGroup
Jump Financial, LLCin group Jump Financial, LLC940,500$9.05M0.11%new13F-HR/ATimelineGroup
Sara-Bay Financial903,103$8.69M2.43%new13F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …663,939$6.39M0.02%-1,301,54513F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co661,961$6.37M<0.01%+487,03313F-HRTimelineGroup
GROUP ONE TRADING LLC628,243$6.04M0.18%-78,54513F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC624,807$6.01M0.01%new13F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP600,049$5.77M<0.01%+166,76113F-HRTimelineGroup
Encompass Capital Advisors LLCin group Encompass Capital Advisors LLC500,000$4.81M0.22%new13F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL460,685$4.43M0.03%+125,68713F-HR/ATimeline
MORGAN STANLEYin group MORGAN STANLEY439,753$4.23M<0.01%-11,57613F-HR/ATimelineGroup
VOLORIDGE INVESTMENT MANAGEMENT, LLC417,908$4.02M0.01%+192,65913F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC408,752$3.93M<0.01%+380,30313F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO374,716$3.6M<0.01%+155,61113F-HR/ATimelineGroup
Verition Fund Management LLC363,765$3.5M0.02%+293,50613F-HRTimeline
Diametric Capital, LP355,680$3.42M1.27%+86,15313F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP337,245$3.24M<0.01%-5,66713F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC328,022$3.16M<0.01%+313,98713F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP320,236$3.08M0.26%-64,09013F-HRTimeline
Creative Planningin group Creative Planning316,765$3.05M<0.01%+143,99513F-HRTimelineGroup
Caprock Group, LLC296,000$2.75M0.07%13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC245,985$2.37M<0.01%+213,70413F-HRTimelineGroup
Rathbones Group PLC237,064$2.28M0.01%+28,91513F-HRTimeline
POLEN CAPITAL MANAGEMENT LLC232,913$2.24M0.01%+57,77513F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC232,364$2.24M<0.01%+56,41613F-HR/ATimelineGroup
Concentric Capital Strategies, LP218,054$2.1M0.1%new13F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp211,604$2.04M<0.01%+58,45013F-HRTimelineGroup
Penn Capital Management Company, LLC202,144$1.94M0.15%+183,47913F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC201,200$1.94M<0.01%new13F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP200,000$1.92M0.04%new13F-HRTimeline
Schonfeld Strategic Advisors LLC199,847$1.92M0.01%new13F-HRTimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.192,308$1.85M<0.01%new13F-HRTimelineGroup
Nuveen, LLCin group TIAA167,375$1.61M<0.01%+35,37813F-HRTimelineGroup
Shay Capital LLC148,000$1.42M0.26%+104,50013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.143,307$1.38M<0.01%-327,91213F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd139,782$1.34M0.07%+115,62713F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/128,283$1.23M<0.01%-4,27313F-HR/ATimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…126,578$1.22M<0.01%+117,15413F-HRTimelineGroup
Virtu Financial LLCin group Virtu Financial LLC120,131$1.16M0.06%+26,84413F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP117,952$1.13M<0.01%+79,50013F-HRTimelineGroup
Farther Finance Advisors, LLC111,176$1.07M0.02%+15,17713F-HRTimeline
SPX Gestao de Recursos Ltdain group SPX Gestao de Recursos Ltda109,600$1.05M0.09%new13F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA107,719$1.04M<0.01%+83,14813F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/104,372$1M<0.01%+77,37213F-HRTimelineGroup
RHUMBLINE ADVISERS102,287$984K<0.01%+23,29313F-HRTimeline
ALLIANCEBERNSTEIN L.P.98,870$951K<0.01%013F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC98,396$947K0.07%-7,05613F-HRTimeline
Marex Group Ltdin group Marex Group Ltd68,500$659K0.01%-6,50013F-HRTimelineGroup
Informed Momentum Co LLC68,148$656K0.08%-8,56813F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC65,434$629K<0.01%+12,43613F-HRTimeline
Scientech Research LLC64,388$619K0.22%-4,86513F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…61,120$588K0.01%new13F-HRTimelineGroup
HRT FINANCIAL LP54,714$526K<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.51,351$494K0.01%+30,07213F-HRTimeline
MML INVESTORS SERVICES, LLC48,849$470K<0.01%+1,84113F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN47,066$453K<0.01%+17,69713F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…45,717$440K<0.01%+10,82013F-HRTimelineGroup
NISA INVESTMENT ADVISORS, LLC45,238$435K<0.01%+44,20013F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …45,000$433K<0.01%013F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management42,888$413K<0.01%new13F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\42,701$411K<0.01%+5,70213F-HRTimelineGroup
Mariner, LLCin group Mariner, LLC41,030$395K<0.01%+12,38513F-HRTimelineGroup
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.39,526$380K<0.01%new13F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.36,951$358K<0.01%+29,45113F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…35,598$342K<0.01%+3,92013F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC34,362$331K<0.01%+8,60613F-HRTimeline
Allegheny Financial Group33,498$322K0.06%-39313F-HRTimeline
IMC-Chicago, LLC33,228$320K0.01%-42,04913F-HRTimeline
OMERS ADMINISTRATION Corp32,600$314K<0.01%-89,20013F-HRTimeline
Advisory Services Network, LLC31,238$301K<0.01%+17,40313F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/30,150$289K<0.01%+27,63613F-HRTimelineGroup
Canal Insurance CO30,000$289K0.06%new13F-HRTimeline
SOUTHPORT MANAGEMENT, L.L.C.in group SOUTHPORT MANAGEMENT, L.L.C.30,000$289K1.19%new13F-HRTimelineGroup
Sanctuary Advisors, LLC28,552$275K<0.01%-5,71413F-HR/ATimeline
AlphaQuest LLC28,272$272K0.02%-6,44413F-HRTimeline
Centiva Capital, LP26,244$252K0.02%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…25,203$242K0.01%+14,31313F-HRTimelineGroup
CORSAIR CAPITAL MANAGEMENT, L.P.25,000$240K0.04%new13F-HR/ATimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …24,997$240K<0.01%+4,15713F-HRTimelineGroup
Belvedere Trading LLC23,822$229K0.02%+19213F-HRTimeline
PFG Investments, LLC23,800$229K0.01%-2,70013F-HRTimeline
FLOW TRADERS U.S. LLC23,703$228K0.01%new13F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.23,371$225K<0.01%new13F-HRTimelineGroup
Pekin Hardy Strauss, Inc.22,950$221K0.02%new13F-HRTimeline
NewEdge Advisors, LLC21,900$211K<0.01%new13F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC21,763$209K<0.01%new13F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV21,056$203K<0.01%+1,62213F-HRTimeline
SIG BROKERAGE, LP20,912$201K0.05%new13F-HRTimeline
Police & Firemen's Retirement System of…20,760$200K<0.01%+6,39413F-HRTimeline
Fielder Capital Group LLC18,070$174K0.04%013F-HRTimeline
WOLVERINE TRADING, LLC16,497$171K<0.01%+3,21913F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND17,100$165K<0.01%013F-HRTimeline
DRW Securities, LLC15,441$149K0.01%new13F-HRTimeline
Perennial Advisors, LLC15,000$144K0.02%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS14,851$143K<0.01%+9,30213F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC14,753$142K<0.01%-5,42413F-HRTimelineGroup
Cresset Asset Management, LLC13,606$131K<0.01%new13F-HR/ATimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC13,507$130K<0.01%-2,32213F-HRTimelineGroup
SIMPLEX TRADING, LLC13,397$128K<0.01%-226,75313F-HRTimeline
LPL Financial LLC13,167$127K<0.01%-6,06013F-HRTimeline
ProShare Advisors LLC13,101$126K<0.01%+1,44813F-HRTimeline
Cetera Investment Advisers12,873$124K<0.01%new13F-HRTimeline
FMR LLCin group FMR LLC12,728$122K<0.01%+2,36713F-HRTimelineGroup
Caitong International Asset Management …12,622$121K0.08%+9,69513F-HRTimeline
FNY Investment Advisers, LLC12,500$120K0.04%+11,50013F-HRTimeline
Chicago Capital, LLC12,000$115K<0.01%new13F-HRTimeline
KKM Financial LLC12,000$115K0.04%013F-HRTimeline
Cubist Systematic Strategies, LLC10,512$101K<0.01%new13F-HRTimeline
Evelyn Partners Investment Management L…in group Evelyn Partners Group Ltd10,000$96.2K<0.01%new13F-HRTimelineGroup
ONCE CAPITAL MANAGEMENT, LLC9,600$92.4K0.03%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc8,377$80.6K<0.01%+1,95313F-HRTimelineGroup
Leonteq Securities AG8,000$77K<0.01%-12,63913F-HRTimeline
TrinityBridge Ltd7,500$72K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.group of 2 filers holding6,463$62.2K+730Timeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…3,767$36.2K<0.01%+213F-HRTimeline
Quantbot Technologies LP3,560$34.2K<0.01%new13F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…3,121$30K<0.01%new13F-HRTimelineGroup
SUMMIT SECURITIES GROUP LLC2,778$26.7K0.01%new13F-HRTimeline
Federation des caisses Desjardins du Qu…2,680$25.8K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP2,289$24.1K<0.01%+1,37513F-HRTimelineGroup
AMALGAMATED BANK1,808$17K<0.01%013F-HRTimeline
Parallel Advisors, LLC1,536$14.8K<0.01%-113F-HRTimeline
SIGNATUREFD, LLC1,000$9.62K<0.01%013F-HRTimeline
Global Retirement Partners, LLC1,000$9.62K<0.01%new13F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.588$5.66K<0.01%new13F-HRTimelineGroup
ORG Partners LLC585$5.63K<0.01%+35013F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.300$2.89K<0.01%013F-HRTimelineGroup
Wilmington Savings Fund Society, FSB220$2.12K<0.01%new13F-HR/ATimeline
ARMSTRONG ADVISORY GROUP, INC216$2.08K<0.01%new13F-HRTimeline
SJS Investment Consulting Inc.200$1.92K<0.01%new13F-HRTimeline
GAMMA Investing LLC198$1.91K<0.01%+3013F-HRTimeline
Rise Advisors, LLC193$1.86K<0.01%013F-HRTimeline
Sterling Capital Management LLC186$1.79K<0.01%+3213F-HRTimeline
Arax Advisory Partners120$1.16K<0.01%new13F-HRTimeline
AdvisorNet Financial, Inc120$1.15K<0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC149$1K<0.01%+413F-HRTimelineGroup
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…78$750<0.01%-3413F-HRTimelineGroup
ISLAY CAPITAL MANAGEMENT, LLC39$375<0.01%new13F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\20$192<0.01%-5413F-HRTimelineGroup
Allworth Financial LP5$49<0.01%new13F-HRTimeline
Activest Wealth Management0$00%-48013F-HRTimelineValue filed as zero, left out of ratios. Amount filed as zero, left out of ratios.