Vault-13

ASP ISOTOPES INC ASPI

COM · Common Stock · CUSIP 00218A105 · ISIN US00218A1051

96 institutional holders +26 vs Q3 2024
32,500,43032.5m shares reported held*
45.5% of all shares outstanding*
$147.2mreported value*
34 new 34 added 18 reduced 10 sold out net bought ≈ $44.7m (+9.9m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($65.1k this quarter). Holder counts are more reliable. Shares outstanding: 71.4m as of 2024-11-13, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $4.53. Options: 7 managers hold calls ($2.6m notional), 7 hold puts ($3.8m).

Trends to Q4 2024

Institutional holders

Managers reporting a position, each quarter

050100Q4 22: 4Q1 23: 7Q2 23: 5Q3 23: 12Q4 23: 20Q1 24: 32Q2 24: 52Q3 24: 70Q4 24: 9696Q4 22Q2 23Q4 23Q2 24Q4 24
Numbers
QuarterHolders
Q4 20224
Q1 20237
Q2 20235
Q3 202312
Q4 202320
Q1 202432
Q2 202452
Q3 202470
Q4 202496

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q1 23: 4 bought or addedQ1 23: 1 cut or sold outQ2 23: 4 bought or addedQ2 23: 5 cut or sold outQ2 23Q3 23: 8 bought or addedQ3 23: 4 cut or sold outQ4 23: 15 bought or addedQ4 23: 5 cut or sold outQ4 23Q1 24: 28 bought or addedQ1 24: 7 cut or sold outQ2 24: 41 bought or addedQ2 24: 20 cut or sold outQ2 24Q3 24: 56 bought or addedQ3 24: 14 cut or sold outQ4 24: 68 bought or addedQ4 24: 28 cut or sold outQ4 24
Numbers
QuarterBought or addedCut or sold out
Q1 202341
Q2 202345
Q3 202384
Q4 2023155
Q1 2024287
Q2 20244120
Q3 20245614
Q4 20246828

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$1m$2m$3m$4mQ1 24 calls: $0Q1 24 puts: $0Q1 24P/C —Q2 24 calls: $0Q2 24 puts: $0Q2 24P/C —Q3 24 calls: $0Q3 24 puts: $0Q3 24P/C —Q4 24 calls: $2.6mQ4 24 puts: $3.8mQ4 24P/C 1.46
Numbers
QuarterCallsPutsP/C
Q1 2024$0$0—
Q2 2024$0$0—
Q3 2024$0$0—
Q4 2024$2.6m$3.8m1.46

Biggest buyers

Philadelphia Financial Management of San Francisco, LLC Added +2,161,682+2.2m
BNP PARIBAS ASSET MANAGEMENT Holding S.A. Added +2,080,676+2.1m
UBS Group AG Added +1,891,178+1.9m
CenterBook Partners LP New +1,501,044+1.5m
BlackRock, Inc. Added +1,252,759+1.3m
AWM Investment Company, Inc. Added +586,600+586.6k
TWO SIGMA INVESTMENTS, LP New +437,185+437.2k
VANGUARD GROUP INC Added +360,748+360.7k
Nuveen Asset Management, LLC Added +359,811+359.8k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added +358,735+358.7k

Biggest sellers

MARSHALL WACE, LLP Reduced -852,717-852.7k
Alyeska Investment Group, L.P. Reduced -400,000-400.0k
Rovida Advisors Inc. Sold out -400,000-400.0k
MMCAP International Inc. SPC Sold out -273,143-273.1k
Fiera Capital Corp Sold out -260,000-260.0k
Telemark Asset Management, LLC Reduced -225,000-225.0k
Walleye Capital LLC Reduced -177,664-177.7k
JANE STREET GROUP, LLC Sold out -145,969-146.0k
CORSAIR CAPITAL MANAGEMENT, L.P. Sold out -56,732-56.7k
HTLF Bank Sold out -48,769-48.8k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $870.2k192.1k shares
GROUP ONE TRADING LLC New $745.2k164.5k shares
CITADEL ADVISORS LLC New $468.9k103.5k shares
SIMPLEX TRADING, LLC New $246.0k54.5k shares
JANE STREET GROUP, LLC New $220.6k48.7k shares
WOLVERINE TRADING, LLC New $61.8k13.5k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. New $00 shares

Biggest puts

SUSQUEHANNA INTERNATIONAL GROUP, LLP New $2.4m523.2k shares
CITADEL ADVISORS LLC New $603.8k133.3k shares
Sculptor Capital LP New $434.0k95.8k shares
GROUP ONE TRADING LLC New $292.2k64.5k shares
SIMPLEX TRADING, LLC New $72.0k16.1k shares
NATIONAL BANK OF CANADA /FI/ New $39.0k86 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. New $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Mann Paul Elliot 13G · exempt (held before listing) -3.8 pts · filed 2026-02-17 7.0% -3.8 pts 7.8m≈ $48.3m 2026-02-17
BlackRock, Inc. 13G · institution +1.1 pts · filed 2026-04-27 6.6% +1.1 pts 8.3m≈ $51.5m 2026-04-27
AWM Investment Company, Inc. 13G · institution -1.1 pts · filed 2026-02-13 5.8% -1.1 pts 619.6k≈ $3.9m 2026-02-13
AK Jensen Investment Management Ltd 13G · institution -1.2 pts · filed 2025-11-14 5.4% -1.2 pts 5.0m≈ $30.8m 2025-11-14
Encompass Capital Advisors LLC 13G · passive investor new · filed 2026-01-23 5.1% new 6.4m≈ $39.9m 2026-01-23

Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26), BNP Paribas Asset Management UK Ltd (0.9%, 2026-02-09)

Insider purchases and sales in Q4 2024

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
404Q1 23: 0 buyingQ1 23: 0 sellingQ2 23: 1 buyingQ2 23: 0 sellingQ2 23Q3 23: 0 buyingQ3 23: 0 sellingQ4 23: 3 buyingQ4 23: 0 sellingQ4 23Q1 24: 1 buyingQ1 24: 0 sellingQ2 24: 1 buyingQ2 24: 0 sellingQ2 24Q3 24: 2 buyingQ3 24: 0 sellingQ4 24: 0 buyingQ4 24: 0 sellingQ4 24
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q1 20230—0——
Q2 20231$81.2k0——
Q3 20230—0——
Q4 20233$191.1k0——
Q1 20241$42.0k0——
Q2 20241$119.4k0——
Q3 20242—0——
Q4 20240—0——

None reported in Q4 2024.

Holders, Q4 2024

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.05% of their portfolio Paris, I0 4,328,5024.3m $19.6m $19.6m 0.05% Added +2.1m +2,080,676
2 AWM Investment Company, Inc. 2.34% of their portfolio NEW YORK, NY 4,246,1864.2m $19.2m $19.2m 2.34% Added +586.6k +586,600
3 BlackRock, Inc. 0.00% of their portfolio New York, NY 3,955,3884.0m $17.9m $17.9m 0.00% Added +1.3m +1,252,759
4 VANGUARD GROUP INC 0.00% of their portfolio Valley Forge, PA 3,181,5053.2m $14.4m $14.4m 0.00% Added +360.7k +360,748
5 Philadelphia Financial Management of San Francisco, LLC 2.87% of their portfolio SAN FRANCISCO, CA 3,153,5453.2m $14.3m $14.3m 2.87% Added +2.2m +2,161,682
6 UBS Group AG 0.00% of their portfolio ZURICH, V8 1,954,8972.0m $8.9m $8.9m 0.00% Added +1.9m +1,891,178
7 CenterBook Partners LP 0.41% of their portfolio GREENWICH, CT 1,501,0441.5m $6.8m $6.8m 0.41% New
8 Telemark Asset Management, LLC 0.67% of their portfolio BOSTON, MA 1,475,0001.5m $6.7m $6.7m 0.67% Reduced -225.0k -225,000
9 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 1,175,4501.2m $5.3m $5.3m 0.00% Added +57.0k +57,027
10 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 1,029,7321.0m $4.7m $4.7m 0.00% Added +176.0k +176,037
11 GSA CAPITAL PARTNERS LLP 0.27% of their portfolio LONDON, X0 808,711808.7k $3.7m $3.7m 0.27% Added +37.7k +37,722
12 TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio NEW YORK, NY 437,185437.2k $2.0m $2.0m 0.00% New
13 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 435,688435.7k $2.0m $2.0m 0.00% Added +58.5k +58,525
14 Nuveen Asset Management, LLC 0.00% of their portfolio CHICAGO, IL 413,346413.3k $1.9m $1.9m 0.00% Added +359.8k +359,811
15 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 384,472384.5k $1.7m $1.7m 0.00% Added +358.7k +358,735
16 Alyeska Investment Group, L.P. 0.01% of their portfolio CHICAGO, IL 347,022347.0k $1.6m $1.6m 0.01% Reduced -400.0k -400,000
17 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 315,540315.5k $1.4m $1.4m 0.00% Added +76.9k +76,880
18 Diametric Capital, LP 0.93% of their portfolio BOSTON, MA 303,855303.9k $1.4m $1.4m 0.93% Added +11.9k +11,886
19 Rovida Investment Management Ltd 0.31% of their portfolio Grand Cayman, E9 218,972219.0k $989.8k $989.8k 0.31% First filing
20 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 211,893211.9k $959.9k $959.9k 0.00% Added +167.5k +167,501
21 Rathbones Group PLC 0.00% of their portfolio Liverpool, X0 176,099176.1k $797.7k $797.7k 0.00% Reduced -29.8k -29,756
22 GOLDMAN SACHS GROUP INC 0.00% of their portfolio NEW YORK, NY 172,581172.6k $781.8k $781.8k 0.00% Added +87.9k +87,876
23 Apis Capital Advisors, LLC 0.52% of their portfolio New York, NY 172,528172.5k $781.6k $781.6k 0.52% New
24 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio SAN FRANCISCO, CA 158,226158.2k $716.8k $716.8k 0.00% Added +37.9k +37,948
25 MARSHALL WACE, LLP 0.00% of their portfolio LONDON, X0 147,997148.0k $670.4k $670.4k 0.00% Reduced -852.7k -852,717
26 Bank of New York Mellon Corp 0.00% of their portfolio NEW YORK, NY 125,874125.9k $570.2k $570.2k 0.00% Reduced -8.5k -8,512
27 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 113,084113.1k $512.3k $512.3k 0.00% Added +86.1k +86,075
28 BARCLAYS PLC 0.00% of their portfolio LONDON, X0 107,957108.0k $489.0k $489.0k 0.00% Added +35.6k +35,627
29 PRELUDE CAPITAL MANAGEMENT, LLC 0.04% of their portfolio NEW YORK, NY 102,720102.7k $465.3k $465.3k 0.04% Reduced -3.6k -3,608
30 Sculptor Capital LP 0.01% of their portfolio New York, NY 95,80095.8k $434.0k $434.0k 0.01% New
31 TWO SIGMA ADVISERS, LP 0.00% of their portfolio NEW YORK, NY 88,70088.7k $401.8k $401.8k 0.00% New
32 Marex Group Ltd 0.01% of their portfolio London, X0 77,50077.5k $351.1k $351.1k 0.01% New
33 GROUP ONE TRADING LLC 0.01% of their portfolio CHICAGO, IL 67,12167.1k $304.1k $304.1k 0.01% New
34 RHUMBLINE ADVISERS 0.00% of their portfolio BOSTON, MA 60,36360.4k $273.4k $273.4k 0.00% Added +24.7k +24,664
35 CITIGROUP INC 0.00% of their portfolio NEW YORK, NY 59,05159.1k $267.5k $267.5k 0.00% Added +22.6k +22,636
36 Squarepoint Ops LLC 0.00% of their portfolio NEW YORK, NY 58,83458.8k $266.5k $266.5k 0.00% Added +26.2k +26,219
37 Virtu Financial LLC 0.01% of their portfolio New York, NY 58,81258.8k $266.0k $266.0k 0.01% Added +47.1k +47,119
38 Saranac Partners Ltd 0.11% of their portfolio LONDON, X0 44,19544.2k $200.2k $200.2k 0.11% New
39 Pekin Hardy Strauss, Inc. 0.02% of their portfolio CHICAGO, IL 35,45035.5k $160.6k $160.6k 0.02% New
40 Centiva Capital, LP 0.01% of their portfolio New York, NY 33,71433.7k $152.7k $152.7k 0.01% New
41 DEUTSCHE BANK AG\ 0.00% of their portfolio FRANKFURT AM MAIN, 2M 33,58733.6k $152.1k $152.1k 0.00% Added +6.8k +6,763
42 AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio Greenwich, CT 30,12130.1k $136.4k $136.4k 0.00% Reduced -1.9k -1,933
43 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 29,53029.5k $133.8k $133.8k 0.00% Unchanged
44 MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio CAUSEWAY BAY, K3 28,90428.9k $130.9k $130.9k 0.00% Added +7.2k +7,250
45 INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio WEST PALM BEACH, FL 28,53928.5k $129.3k $129.3k 0.00% New
46 Corebridge Financial, Inc. 0.00% of their portfolio HOUSTON, TX 26,03926.0k $118.0k $118.0k 0.00% Reduced -951 -951
47 MetLife Investment Management, LLC 0.00% of their portfolio Whippany, NJ 25,98826.0k $117.7k $117.7k 0.00% Reduced -5.8k -5,834
48 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 25,00025.0k $113.2k $113.2k 0.00% New
49 PARAGON ASSOCIATES & PARAGON ASSOCIATES II JOINT VENTURE 0.26% of their portfolio DALLAS, TX 25,00025.0k $113.2k $113.2k 0.26% New
50 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 24,47224.5k $110.9k $110.9k 0.00% Added +8.9k +8,925
51 SG Americas Securities, LLC 0.00% of their portfolio NEW YORK, NY 21,97522.0k $100.0k $100.0k 0.00% New
52 PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio BALTIMORE, MD 21,64621.6k $99.0k $99.0k 0.00% Added +2.8k +2,757
53 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 21,03321.0k $95.3k $95.3k 0.00% Added +1.7k +1,690
54 Engineers Gate Manager LP 0.00% of their portfolio NEW YORK, NY 19,87519.9k $90.0k $90.0k 0.00% New
55 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 18,06018.1k $81.8k $81.8k 0.00% Reduced -503 -503
56 Fielder Capital Group LLC 0.03% of their portfolio NASHVILLE, TN 18,05518.1k $81.8k $81.8k 0.03% Unchanged
57 KKM Financial LLC 0.03% of their portfolio CHICAGO, IL 17,25017.2k $78.1k $78.1k 0.03% Reduced -5.3k -5,350
58 Almanack Investment Partners, LLC. 0.01% of their portfolio WAYNE, PA 15,05015.1k $68.2k $68.2k 0.01% New
59 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 15,03715.0k $68.1k $68.1k 0.00% Reduced -81 -81
60 Walleye Capital LLC 0.00% of their portfolio NEW YORK, NY 15,00015.0k $68.0k $68.0k 0.00% Reduced -177.7k -177,664
61 ProShare Advisors LLC 0.00% of their portfolio BETHESDA, MD 14,75114.8k $66.8k $66.8k 0.00% New
62 Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio TRENTON, NJ 14,36614.4k $65.1k $65.1k 0.00% First filing
63 Sanctuary Advisors, LLC 0.00% of their portfolio INDIANAPOLIS, IN 13,04013.0k $79.9k $79.9k 0.00% Reduced -10.6k -10,602
64 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 12,18712.2k $55.2k $55.2k 0.00% New
65 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 11,99012.0k $54.3k $54.3k 0.00% New
66 Covestor Ltd 0.03% of their portfolio LONDON, X0 11,90811.9k $54.0k $54.0k 0.03% New
67 Pale Fire Capital SE 0.01% of their portfolio Prague, 2N 11,70011.7k $53.0k $53.0k 0.01% New
68 Leonteq Securities AG 0.01% of their portfolio ZURICH, V8 11,63911.6k $52.7k $52.7k 0.01% Reduced -1.7k -1,700
69 BOSTON FINANCIAL MANGEMENT LLC 0.00% of their portfolio BOSTON, MA 11,00011.0k $49.8k $49.8k 0.00% New
70 SVB WEALTH LLC 0.00% of their portfolio BOSTON, MA 10,76510.8k $48.8k $48.8k 0.00% New
71 Russell Investments Group, Ltd. 0.00% of their portfolio Seattle, WA 10,22110.2k $46.3k $46.3k 0.00% Added +3.7k +3,682
72 AVANTAX ADVISORY SERVICES, INC. 0.00% of their portfolio DALLAS, TX 10,00010.0k $45.3k $45.3k 0.00% New
73 Snowden Capital Advisors LLC 0.00% of their portfolio New York, NY 10,00010.0k $45.3k $45.3k 0.00% Reduced -10.0k -10,000
74 FMR LLC 0.00% of their portfolio BOSTON, MA 9,0079.0k $40.8k $40.8k 0.00% Added +1.4k +1,406
75 NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio MONTREAL, A8 8,6008.6k $39.0k $39.0k 0.00% New
76 BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio PARIS, I0 7,4297.4k $33.7k $33.7k 0.00% New
77 Hanson & Doremus Investment Management 0.00% of their portfolio BURLINGTON, VT 6,0006.0k $27.0k $27.0k 0.00% New
78 Legal & General Group Plc 0.00% of their portfolio London, X0 5,5395.5k $25.1k $25.1k 0.00% Reduced -541 -541
79 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 5,0715.1k $23.0k $23.0k 0.00% First filing
80 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 4,2754.3k $19.4k $19.4k 0.00% Added +447 +447
81 Ameritas Investment Partners, Inc. 0.00% of their portfolio LINCOLN, NE 3,8833.9k $17.6k $17.6k 0.00% Unchanged
82 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio WEST SACRAMENTO, CA 3,7653.8k $17.1k $17.1k 0.00% Unchanged
83 NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio ALBANY, NY 3,3003.3k $14.9k $14.9k 0.00% Added +1.5k +1,500
84 Federation des caisses Desjardins du Quebec 0.00% of their portfolio LEVIS, A8 2,6802.7k $12.1k $12.1k 0.00% New
85 MAI Capital Management 0.00% of their portfolio INDEPENDENCE, OH 2,2502.2k $10.2k $10.2k 0.00% New
86 AMALGAMATED BANK 0.00% of their portfolio NEW YORK, NY 1,3711.4k $6.0k $6.0k 0.00% Unchanged
87 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 1,2791.3k $5.0k $5.0k 0.00% New
88 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 1,0731.1k $5.0k $5.0k 0.00% Reduced -5.4k -5,437
89 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 369369 $1.7k $1.7k 0.00% New
90 CIBC Private Wealth Group LLC 0.00% of their portfolio ATLANTA, GA 300300 $1.4k $1.4k 0.00% New
91 NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio ST. LOUIS, MO 138138 $625 $625 0.00% Unchanged
92 CWM, LLC 0.00% of their portfolio OMAHA, NE 7979 $0 $0 0.00% Added +23 +23
93 Sterling Capital Management LLC 0.00% of their portfolio CHARLOTTE, NC 5555 $249 $249 0.00% Added +14 +14
94 US BANCORP \DE\ 0.00% of their portfolio MINNEAPOLIS, MN 5454 $245 $245 0.00% New
95 EverSource Wealth Advisors, LLC 0.00% of their portfolio BIRMINGHAM, AL 1212 $54 $54 0.00% New
96 CONCOURSE FINANCIAL GROUP SECURITIES, INC. 0.00% of their portfolio BIRMINGHAM, AL 00 $0 $0 0.00% Unchanged