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Disclosery

ASPI ASP ISOTOPES INC

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COM (common), issuer CIK 1921865

172 managers (173 13F filers) reported a position in ASPI shares at 2025-12-31, 58,557,838 shares in all. 46 filers opened a position and 32 filers sold out during the quarter.

Managers
172
13F filers
173
New
46
Added
77
Reduced
35
Sold out
32
Shares held by filers
58,557,838

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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
BlackRock, Inc.in group BlackRock, Inc.6,789,417$36.3M<0.01%+1,328,42513F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC6,406,244$34.3M<0.01%+1,889,48113F-HRTimelineGroup
Alyeska Investment Group, L.P.in group Alyeska Investment Group, L.P.4,895,546$26.2M0.07%+2,072,85113F-HRTimelineGroup
Rovida Investment Management Ltd4,100,000$21.9M2.98%+900,00013F-HRTimeline
UBS Group AGgroup of 2 filers holding2,508,833$13.4M+1,547,541Timeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,384,066$12.8M<0.01%+521,61113F-HRTimelineGroup
AWM Investment Company, Inc.2,124,496$11.4M1.1%-834,10013F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,844,405$9.87M<0.01%+438,67313F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC1,725,553$9.23M0.01%+559,78813F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC1,715,292$9.18M<0.01%+1,306,54013F-HR/ATimelineGroup
MORGAN STANLEYin group MORGAN STANLEY1,709,783$9.15M<0.01%+1,270,03013F-HR/ATimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC1,586,961$8.49M0.01%+368,24413F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…1,516,643$8.11M0.01%+174,86013F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC1,400,314$7.49M0.06%+194,03413F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …944,326$5.05M0.01%+280,38713F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co885,739$4.74M<0.01%+223,77813F-HRTimelineGroup
Telemark Asset Management, LLC825,000$4.41M0.44%-500,00013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP818,129$4.38M<0.01%-460,99213F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP745,909$3.99M<0.01%+145,86013F-HRTimelineGroup
Diametric Capital, LP737,304$3.94M1.06%+381,62413F-HRTimeline
WIM INVESTMENT MANAGEMENT Ltd601,400$3.22M0.83%new13F-HRTimeline
Shay Capital LLC579,000$3.1M0.5%+431,00013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC506,788$2.71M<0.01%+274,42413F-HRTimelineGroup
HITE Hedge Asset Management LLC449,883$2.41M0.15%new13F-HRTimeline
GROUP ONE TRADING LLC444,345$2.38M0.07%-183,89813F-HRTimeline
Schonfeld Strategic Advisors LLC414,875$2.22M0.01%+215,02813F-HRTimeline
Pacer Advisors, Inc.404,372$2.16M0.01%new13F-HR/ATimeline
Rathbones Group PLC399,599$2.14M0.01%+162,53513F-HR/ATimeline
Quantbot Technologies LP396,599$2.12M0.07%+393,03913F-HRTimeline
Saba Capital Management, L.P.in group Saba Capital Management, L.P.356,377$1.91M0.06%new13F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP356,237$1.91M<0.01%+18,99213F-HRTimelineGroup
GSA CAPITAL PARTNERS LLP329,488$1.76M0.15%+9,25213F-HRTimeline
Caprock Group, LLC322,314$1.72M0.04%+26,31413F-HRTimeline
IMC-Chicago, LLC294,502$1.58M0.03%+261,27413F-HRTimeline
Burkehill Global Management, LP250,000$1.34M0.09%new13F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp243,987$1.31M<0.01%+32,38313F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/230,856$1.24M<0.01%+102,57313F-HRTimelineGroup
PRELUDE CAPITAL MANAGEMENT, LLC228,487$1.22M0.09%+130,09113F-HRTimeline
Swiss National Bank210,100$1.12M<0.01%new13F-HRTimeline
Arosa Capital Management LP200,000$1.07M0.69%new13F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO194,479$1.04M<0.01%-180,23713F-HRTimelineGroup
VARCOV Co.188,649$1.01M0.4%13F-HRTimeline
Verition Fund Management LLC187,728$1M0.01%-176,03713F-HRTimeline
Nuveen, LLCin group TIAA182,725$978K<0.01%+15,35013F-HRTimelineGroup
PFG Investments, LLC181,800$973K0.05%+158,00013F-HRTimeline
SBI Securities Co., Ltd.152,120$814K0.02%+100,76913F-HRTimeline
Massar Capital Management, LP147,376$788K0.16%new13F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…145,463$778K<0.01%+18,88513F-HRTimelineGroup
POLEN CAPITAL MANAGEMENT LLC139,511$746K<0.01%-93,40213F-HRTimeline
Empowered Funds, LLC134,602$720K0.01%new13F-HR/ATimeline
TUDOR INVESTMENT CORP ET AL132,936$711K<0.01%-327,74913F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN131,671$704K<0.01%+84,60513F-HRTimelineGroup
Penn Capital Management Company, LLC126,916$679K0.05%-75,22813F-HRTimeline
Farther Finance Advisors, LLC124,563$666K0.01%+13,38713F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/117,886$631K<0.01%+13,51413F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP109,852$588K<0.01%-8,10013F-HRTimelineGroup
RHUMBLINE ADVISERS101,537$543K<0.01%-75013F-HRTimeline
Canal Insurance CO100,000$535K0.13%+70,00013F-HRTimeline
SIMPLEX TRADING, LLC93,716$501K0.01%+80,31913F-HRTimeline
AlphaQuest LLC88,177$472K0.03%+59,90513F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.87,260$467K<0.01%+47,73413F-HRTimelineGroup
Marex Group Ltdin group Marex Group Ltd85,201$456K<0.01%+16,70113F-HRTimelineGroup
FNY Investment Advisers, LLC85,100$455K0.13%+72,60013F-HRTimeline
SOUTHPORT MANAGEMENT, L.L.C.in group SOUTHPORT MANAGEMENT, L.L.C.85,000$455K1.59%+55,00013F-HRTimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management80,527$431K<0.01%+37,63913F-HRTimelineGroup
MOORE CAPITAL MANAGEMENT, LP80,000$428K0.01%-120,00013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…77,208$413K<0.01%+73,44113F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO77,004$412K<0.01%new13F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc76,511$409K<0.01%+68,13413F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC75,352$403K<0.01%+60,59913F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…72,000$386K0.01%+10,88013F-HRTimelineGroup
Cetera Investment Advisers71,307$381K<0.01%+58,43413F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\68,620$367K<0.01%+25,91913F-HRTimelineGroup
Graham Capital Management, L.P.66,998$358K0.01%new13F-HRTimeline
NATIONAL BANK OF CANADA /FI/in group NATIONAL BANK OF CANADA /FI/62,397$333K<0.01%+32,24713F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.59,553$319K<0.01%-83,75413F-HRTimelineGroup
Quantinno Capital Management LP56,776$304K<0.01%new13F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.54,037$289K<0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…52,633$282K<0.01%+6,91613F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.50,686$271K<0.01%+13,73513F-HRTimelineGroup
Resolute Capital Asset Partners LLC50,000$268K0.13%new13F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/49,044$263K<0.01%-998,71413F-HRTimeline
MH & ASSOCIATES SECURITIES MANAGEMENT C…48,666$260K0.21%13F-HRTimeline
LPL Financial LLC47,600$255K<0.01%+34,43313F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC44,899$240K<0.01%-20,53513F-HRTimeline
Atom Investors LP44,661$239K0.02%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…42,940$230K<0.01%+7,34213F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson39,000$208K<0.01%new13F-HRTimelineGroup
AXQ CAPITAL, LP38,092$204K0.05%new13F-HRTimeline
Caitong International Asset Management …34,983$187K0.05%+22,36113F-HR/ATimeline
Allegheny Financial Group34,473$184K0.03%+97513F-HRTimeline
Advisory Services Network, LLC34,372$184K<0.01%+3,13413F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA32,048$172K<0.01%-75,67113F-HRTimelineGroup
DARK FOREST CAPITAL MANAGEMENT LP30,737$164K0.01%new13F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC29,566$158K<0.01%new13F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC29,516$158K<0.01%-4,84613F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC29,356$157K<0.01%-298,66613F-HRTimelineGroup
Leonteq Securities AG28,515$153K0.01%+20,51513F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …28,033$150K<0.01%+3,03613F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC27,481$147K<0.01%-597,32613F-HRTimelineGroup
Centiva Capital, LP27,186$145K0.01%+94213F-HRTimeline
Pekin Hardy Strauss, Inc.26,700$143K0.01%+3,75013F-HRTimeline
Fortitude Advisory Group L.L.C.25,995$139K0.06%new13F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV25,550$137K<0.01%+4,49413F-HRTimeline
Cresset Asset Management, LLC25,034$134K<0.01%+11,42813F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…23,600$126K<0.01%new13F-HRTimeline
Patriot Financial Group Insurance Agenc…21,825$117K0.01%new13F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM21,676$116K<0.01%new13F-HRTimeline
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC21,427$115K<0.01%-33613F-HRTimelineGroup
Police & Firemen's Retirement System of…20,760$111K<0.01%013F-HRTimeline
Sanctuary Advisors, LLC20,150$108K<0.01%-8,40213F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS20,069$107K<0.01%+5,21813F-HRTimelineGroup
Scientech Research LLC18,775$100K0.06%-45,61313F-HRTimeline
Integrated Wealth Concepts LLC18,508$99K<0.01%new13F-HRTimeline
Fielder Capital Group LLC18,066$96.7K0.02%-413F-HRTimeline
TOCQUEVILLE ASSET MANAGEMENT L.P.in group TOCQUEVILLE ASSET MANAGEMENT …17,000$91K<0.01%new13F-HRTimelineGroup
ProShare Advisors LLC16,904$90.4K<0.01%+3,80313F-HRTimeline
KLP KAPITALFORVALTNING AS16,700$89.3K<0.01%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC16,122$86.3K<0.01%+2,61513F-HRTimelineGroup
J.W. COLE ADVISORS, INC.16,663$85.4K<0.01%new13F-HRTimeline
Compound Planning, Inc.15,334$82K<0.01%new13F-HRTimeline
CORSAIR CAPITAL MANAGEMENT, L.P.15,000$80.2K0.01%-10,00013F-HRTimeline
Perennial Advisors, LLC15,000$80.2K0.01%013F-HRTimeline
MML INVESTORS SERVICES, LLC14,586$78K<0.01%-34,26313F-HRTimeline
Inscription Capital, LLC14,360$76.8K0.01%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND14,300$76.5K<0.01%-2,80013F-HRTimeline
TWO SIGMA SECURITIES, LLC14,275$76.4K0.01%new13F-HRTimeline
SummitTX Capital, L.P.14,128$75.6K<0.01%new13F-HRTimeline
Caption Management, LLC13,800$73.8K<0.01%new13F-HRTimeline
Steward Partners Investment Advisory, L…13,765$73.6K<0.01%new13F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC13,415$71.8K<0.01%new13F-HRTimelineGroup
FMR LLCin group FMR LLC12,710$68K<0.01%-1813F-HRTimelineGroup
DRW Securities, LLC12,350$66.1K0.01%-3,09113F-HRTimeline
Chicago Capital, LLC12,000$64.2K<0.01%013F-HRTimeline
KKM Financial LLC12,000$64.2K0.01%013F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…11,334$60.6K<0.01%new13F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC11,234$60.1K<0.01%new13F-HRTimeline
Creative Planningin group Creative Planning10,429$55.8K<0.01%-306,33613F-HRTimelineGroup
PEAK6 LLCin group PEAK6 LLC9,280$49.6K<0.01%new13F-HR/ATimelineGroup
IFP Advisors, Inc9,000$48.1K<0.01%new13F-HRTimeline
TrinityBridge Ltd7,500$40K<0.01%013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…6,463$34.6K<0.01%013F-HRTimelineGroup
Evelyn Partners Investment Management L…in group Evelyn Partners Group Ltd5,000$26.8K<0.01%-5,00013F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP4,883$26.1K<0.01%+2,59413F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…4,121$22K<0.01%+1,00013F-HR/ATimelineGroup
AMALGAMATED BANK2,906$16K<0.01%+1,09813F-HRTimeline
Federation des caisses Desjardins du Qu…2,180$11.7K<0.01%-50013F-HRTimeline
Bank of New Hampshire2,000$10.7K<0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…1,627$8.7K<0.01%-23,57613F-HRTimelineGroup
Parallel Advisors, LLC1,536$8.22K<0.01%013F-HRTimeline
SIGNATUREFD, LLC1,124$6.01K<0.01%+12413F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,038$5.55K<0.01%-44,20013F-HRTimeline
Global Retirement Partners, LLC1,000$5.35K<0.01%013F-HRTimeline
Hanson & Doremus Investment Management1,000$5K<0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC921$5K<0.01%+77213F-HRTimelineGroup
Strive Financial Group ,LLC742$3.97K<0.01%13F-HR/ATimeline
Copia Wealth Management730$3.91K<0.01%new13F-HRTimeline
Sterling Capital Management LLC576$3.08K<0.01%+39013F-HRTimeline
Optiver Holding B.V.in group Optiver Holding B.V.409$2.19K<0.01%-17913F-HRTimelineGroup
ORG Partners LLC387$2.07K<0.01%-19813F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.300$1.6K<0.01%013F-HRTimelineGroup
Arax Advisory Partners283$1.51K<0.01%+16313F-HRTimeline
GAMMA Investing LLC256$1.37K<0.01%+5813F-HRTimeline
ARMSTRONG ADVISORY GROUP, INC216$1.16K<0.01%013F-HRTimeline
SJS Investment Consulting Inc.200$1.07K<0.01%013F-HRTimeline
Larson Financial Group LLC163$872<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…93$498<0.01%+1513F-HRTimelineGroup
Allworth Financial LP50$268<0.01%+4513F-HRTimeline
ISLAY CAPITAL MANAGEMENT, LLC39$209<0.01%013F-HRTimeline
Quarry LP34$182<0.01%new13F-HRTimeline
MassMutual Private Wealth & Trust, FSB17$91<0.01%new13F-HRTimeline
ROTHSCHILD INVESTMENT LLC6$32<0.01%new13F-HRTimeline