Security Snapshot

ASP Isotopes Inc. - Common Stock (ASPI) Institutional Ownership

CUSIP: 00218A105

13F Institutional Holders and Ownership History from Q4 2022 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

174

Shares (Excl. Options)

58,592,821

Price

$5.35

Type / Class
Equity / Common Stock
Symbol
ASPI on Nasdaq
Shares outstanding
110,850,543
Price per share
$4.42
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
58,592,821
Total reported value
$313,430,601
% of total 13F portfolios
0%
Share change
+5,450,626
Value change
-$11,748,778
Number of holders
174
Price from insider filings
$4.42
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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Quick Takeaways

  • ASPI - ASP Isotopes Inc. - Common Stock is tracked under CUSIP 00218A105.
  • 174 institutions reported positions in Q4 2025.
  • 6 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 174 to 4 between Q4 2025 and Q1 2026.
  • Reported value moved from $313,430,601 to $628,579.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Official SEC Source

Backed by Form 13F

Ownership context comes from SEC Form 13F and, when available, Schedule 13D/13G filings.

See Original Filing

Investment Quick Answers

What is CUSIP 00218A105?
CUSIP 00218A105 identifies ASPI - ASP Isotopes Inc. - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of ASP Isotopes Inc. - Common Stock (ASPI) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Mann Paul Elliot 7% -35% $58,118,940 +$348,704 7,759,538 +0.6% Mann Paul Elliot 31 Dec 2025
Encompass Capital Advisors LLC 5.1% $34,311,487 6,413,362 Encompass Capital Advisors LLC 16 Jan 2026
AK Jensen Investment Management Ltd 5.4% -17% $47,669,611 +$2,373,350 4,955,261 +5.2% AK Jensen Investment Management Ltd 30 Sep 2025
BlackRock, Inc. 5.5% $21,200,880 3,955,388 BlackRock, Inc. 31 Dec 2024
BNP Paribas Asset Management UK Ltd 0.9% -84% $7,073,002 -$20,102,329 944,326 -74% BNP Paribas Asset Management UK Ltd 31 Dec 2025
AWM Investment Company, Inc. 5.8% -16% $4,640,609 -$2,247 619,574 -0.05% AWM Investment Company, Inc. 31 Dec 2025

As of 31 Dec 2025, 174 institutional investors reported holding 58,592,821 shares of ASP Isotopes Inc. - Common Stock (ASPI). This represents 53% of the company’s total 110,850,543 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of ASP Isotopes Inc. - Common Stock (ASPI) together control 43% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 6.1% 6,789,417 +24% 0% $36,323,380
VANGUARD GROUP INC 5.8% 6,406,244 +42% 0% $34,273,406
Alyeska Investment Group, L.P. 4.4% 4,895,546 +73% 0.07% $26,191,171
Rovida Investment Management Ltd 3.7% 4,100,000 +28% 3% $21,894,000
UBS Group AG 2.2% 2,406,457 +150% 0% $12,874,546
GEODE CAPITAL MANAGEMENT, LLC 2.2% 2,384,066 +28% 0% $12,757,945
AWM Investment Company, Inc. 1.9% 2,124,496 -28% 1.1% $11,366,054
STATE STREET CORP 1.7% 1,844,405 +31% 0% $9,867,567
CITADEL ADVISORS LLC 1.6% 1,725,553 +48% 0.01% $9,231,709
GOLDMAN SACHS GROUP INC 1.5% 1,715,292 +320% 0% $9,176,813
MORGAN STANLEY 1.5% 1,709,783 +289% 0% $9,147,339
JANE STREET GROUP, LLC 1.4% 1,586,961 +30% 0.01% $8,490,241
SUSQUEHANNA INTERNATIONAL GROUP, LLP 1.4% 1,516,643 +13% 0.01% $8,114,040
EXCHANGE TRADED CONCEPTS, LLC 1.3% 1,400,314 +16% 0.06% $7,491,680
BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.85% 944,326 +42% 0.01% $5,052,000
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.8% 885,739 +34% 0% $4,738,704
Telemark Asset Management, LLC 0.74% 825,000 -38% 0.44% $4,413,750
MARSHALL WACE, LLP 0.74% 818,129 -36% 0% $4,376,991
NORTHERN TRUST CORP 0.67% 745,909 +24% 0% $3,990,614
Diametric Capital, LP 0.67% 737,304 +107% 1.1% $3,944,576
WIM INVESTMENT MANAGEMENT Ltd 0.54% 601,400 0.83% $3,217,490
Shay Capital LLC 0.52% 579,000 +291% 0.5% $3,097,650
BARCLAYS PLC 0.46% 506,788 +118% 0% $2,711,316
HITE Hedge Asset Management LLC 0.41% 449,883 0.15% $2,406,874
GROUP ONE TRADING LLC 0.4% 444,345 -29% 0.07% $2,377,246

Institutional Holders of ASP Isotopes Inc. - Common Stock (ASPI) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 152,748 $628,579 +$109,370 $4.42 4
2025 Q4 58,592,821 $313,430,601 -$11,748,778 $5.35 174
2025 Q3 52,913,307 $508,847,148 +$110,653,479 $9.62 157
2025 Q2 41,457,954 $305,098,103 +$67,158,257 $7.36 128
2025 Q1 32,449,321 $152,180,878 +$1,683,981 $4.69 95
2024 Q4 32,368,343 $146,626,225 +$46,429,858 $4.53 90
2024 Q3 22,358,987 $62,155,606 +$36,093,163 $2.78 65
2024 Q2 8,782,584 $26,865,000 +$14,523,618 $3.06 50
2024 Q1 3,770,857 $15,573,438 +$9,482,875 $4.13 30
2023 Q4 1,674,490 $3,011,098 +$2,345,436 $1.79 19
2023 Q3 308,068 $292,885 -$942,408 $0.95 11
2023 Q2 551,482 $1,024,133 -$1,744,788 $0.57 4
2023 Q1 3,248,596 $2,772,962 +$2,733,353 $0.85 6
2022 Q4 47,212 $75,285 +$75,285 $1.58 3

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