ASP Isotopes Inc.: which funds bought and sold

Institutions that bought and sold ASP Isotopes shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 111 institutions that filed 13F reports for both quarters added to or opened positions in ASP Isotopes, and 79 cut or closed them. Together they added a net 1.2M shares, +1.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.0M shares (+19.3%); index fund managers were net buyers of 1.6M shares (+7.2%). 37 opened a new position and 28 sold out entirely.

Bought, Q2 2026 111 institutions, 37 of them new holders Sold, Q2 2026 79 institutions, 28 of them sold out

Net change, all compared +1.2M shares (+1.9%)

Net change, active managers +1.0M shares (+19.3%), 17 bought, 11 sold

Buyers versus sellers

institutions compared, 210

111 bought 20 79 sold

Active managers and hedge funds 17 bought · 11 sold · +1.0M

Index fund managers 8 bought · 2 sold · +1.6M

Other institutions 86 bought · 66 sold · −1.4M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+889K +10.7%	9.2M	$57.3M
Marshall Wace, LLP Hedge fund	+836K New position	836K	$5.2M
Man Group PLC Hedge fund	+828K New position	828K	$5.2M
Philadelphia Financial Management Of San Francisco, LLC	+695K +107.1%	1.3M	$8.4M
BNP Paribas Asset Management Holding S.A.	+690K +77.7%	1.6M	$9.8M
Bank Of America Corp	+540K +319.6%	709K	$4.4M
UBS Group AG	+406K +14.3%	3.2M	$20.2M
Nuveen, LLC	+286K +137.9%	493K	$3.1M
State Street Corp Index funds	+273K +11.8%	2.6M	$16.1M
Pacer Advisors, Inc.	+231K +45.8%	735K	$4.6M
Geode Capital Management, LLC Index funds	+205K +7.5%	2.9M	$18.3M
Headlands Technologies LLC	+165K +219.6%	240K	$1.5M
Aquatic Capital Management LLC	+164K New position	164K	$1M
DNB Asset Management As	+155K +259.4%	215K	$1.3M
Alyeska Investment Group, L.P. Hedge fund	+151K +5.6%	2.8M	$17.7M
Invesco Ltd.	+147K +260.2%	204K	$1.3M
Vanguard Portfolio Management LLC Index funds	+138K +14.1%	1.1M	$6.9M
Point72 Asset Management, L.P. Hedge fund	+120K New position	120K	$747,389
Polymer Capital Management (US) LLC	+105K New position	105K	$656,173
Winton Group Ltd Hedge fund	+95K New position	95K	$587,865

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	+836K New position	836K	$5.2M
Man Group PLC Hedge fund	+828K New position	828K	$5.2M
Alyeska Investment Group, L.P. Hedge fund	+151K +5.6%	2.8M	$17.7M
Point72 Asset Management, L.P. Hedge fund	+120K New position	120K	$747,389
Winton Group Ltd Hedge fund	+95K New position	95K	$587,865
Alliancebernstein L.P. Active manager	+69K +178.1%	108K	$476,432
Squarepoint Ops LLC Hedge fund	+53K +75.6%	124K	$770,975
American Century Companies Inc Active manager	+48K New position	48K	$298,691
Centerbook Partners LP Hedge fund	+31K New position	31K	$192,242
Polen Capital Management LLC Active manager	+27K +21.6%	150K	$930,257

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Jane Street Group, LLC	−663K −96.9%	21K	$131,205
Sara-Bay Financial	−587K Sold out	0	—
Awm Investment Company, Inc.	−543K −25.6%	1.6M	$9.8M
Diametric Capital, LP	−415K −43.5%	539K	$3.3M
Morgan Stanley	−414K −26.3%	1.2M	$7.2M
Citadel Advisors LLC Hedge fund	−410K −53.4%	358K	$2.2M
Rathbones Group PLC	−392K −50.6%	382K	$2.4M
Susquehanna International Group, LLP	−352K −33.3%	705K	$4.4M
Encompass Capital Advisors LLC	−350K −5.1%	6.6M	$40.8M
Alight Capital Management LP	−300K Sold out	0	—
Yaupon Capital Management LP Hedge fund	−300K Sold out	0	—
Imc-Chicago, LLC	−268K Sold out	0	—
Burkehill Global Management, LP Hedge fund	−250K Sold out	0	—
Arosa Capital Management LP	−200K Sold out	0	—
Barclays PLC	−165K −16.3%	848K	$5.3M
Tudor Investment Corp Et Al Hedge fund	−161K Sold out	0	—
Group One Trading LLC	−137K −23.0%	458K	$2.9M
Massar Capital Management, LP	−127K −86.2%	20K	$126,477
Pfg Investments, LLC	−114K −74.8%	38K	$238,848
Chicago Partners Investment Group LLC	−109K −29.0%	265K	$1.1M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Citadel Advisors LLC Hedge fund	−410K −53.4%	358K	$2.2M
Yaupon Capital Management LP Hedge fund	−300K Sold out	0	—
Burkehill Global Management, LP Hedge fund	−250K Sold out	0	—
Tudor Investment Corp Et Al Hedge fund	−161K Sold out	0	—
Saba Capital Management, L.P. Hedge fund	−96K −26.9%	261K	$1.6M
Balyasny Asset Management L.P. Hedge fund	−65K −84.8%	12K	$72,376
Verition Fund Management LLC Hedge fund	−12K Sold out	0	—
AQR Capital Management LLC Hedge fund	−10K −42.9%	14K	$84,518
Quantbot Technologies LP Hedge fund	−8,103 −45.5%	9,707	$60,378
Penn Capital Management Company, LLC Active manager	−8,065 −10.2%	71K	$440,109

New positions

largest by value

Institution	Shares	Value June 30, 2026
Marshall Wace, LLPHedge fund	836K	$5.2M
Man Group PLCHedge fund	828K	$5.2M
Aquatic Capital Management LLC	164K	$1M
Point72 Asset Management, L.P.Hedge fund	120K	$747,389
Polymer Capital Management (US) LLC	105K	$656,173
Winton Group LtdHedge fund	95K	$587,865
Fort Washington Investment Advisors Inc	67K	$417,586
Kingsview Wealth Management, LLC	54K	$336,514
Bleakley Financial Group, LLC	50K	$310,714
American Century Companies IncActive manager	48K	$298,691

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Sara-Bay Financial	587K	$2.6M
Alight Capital Management LP	300K	$1.3M
Yaupon Capital Management LPHedge fund	300K	$1.3M
Imc-Chicago, LLC	268K	$1.2M
Burkehill Global Management, LPHedge fund	250K	$1.1M
Arosa Capital Management LP	200K	$884,000
Tudor Investment Corp Et AlHedge fund	161K	$711,753
Peak6 LLC	79K	$350,117
Virtu Financial LLC	50K	$223,000
Patriot Financial Group Insurance Agency, LLC	45K	$198,812

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 185
Ten largest holders: 61.7%
Index fund managers: 36.3%
Active managers and hedge funds: 9.5%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	17	11	7	4	+1.0M	+19.3%
Index fund managers	8	2	0	0	+1.6M	+7.2%
Other institutions	86	66	30	24	−1.4M	−3.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on ASP Isotopes.

Only managers that filed a holdings report for both quarters are compared (210 here). 7 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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