ASPI

Asp Isotopes Inc$3.94 13.86%
MaterialsUSCUSIP 00218A105· EOD Jul 16, 2026◍ Confluence graph
Tracked 13F Holders
139
-2 QoQ
13F Value (tracked)
$261.2M
Insider Net · 180d
$836K
1↑ 1↓
Recent Filings
15
Smart-money sentimentBullish
BearishBullish
13F funds (latest Q)26 adding · 14 trimming
Insider net (180d)+$836K

Price & smart-money activity

$3.94 13.86%4Y +47.8%
$0.30$4.01$7.73$11.44$15.152022202320242025202622222322410879521641491411635127422074927393722
Hover for who · click for detailEnd-of-day closing prices52w $3.94 – $14.05

Top institutional holders

139 tracked 13F filers
#FundPosition valueSharesLast moveAs ofHistory
1BlackRock, Inc.
$36.8M
8.3M
+23%
Added · +1.5M sh
Q1 2026
2Encompass Capital Advisors LLC
$30.6M
6.9M
New
+6.9M sh
Q1 2026
3VANGUARD CAPITAL MANAGEMENT LLC
$22.4M
5.1M
New
+5.1M sh
Q1 2026
4Rovida Investment Management Ltd
$18.1M
4.1M
Held
Q1 2026
5UBS Group AG
$12.6M
2.8M
+18%
Added · +435K sh
Q1 2026
6GEODE CAPITAL MANAGEMENT, LLC
$12.1M
2.7M
+15%
Added · +356K sh
Q1 2026
7Alyeska Investment Group, L.P.
$11.9M
2.7M
−45%
Reduced · −2.2M sh
Q1 2026
8STATE STREET CORP
$10.3M
2.3M
+26%
Added · +478K sh
Q1 2026
9EXCHANGE TRADED CONCEPTS, LLC
$9.7M
2.2M
+56%
Added · +783K sh
Q1 2026
10AWM Investment Company, Inc.
$9.4M
2.1M
Held
Q1 2026
11MORGAN STANLEY
$7.0M
1.6M
−7.8%
Reduced · −133K sh
Q1 2026
12SUSQUEHANNA INTERNATIONAL GROUP, LLP
$4.7M
1.1M
−30%
Reduced · −459K sh
Q1 2026
13BARCLAYS PLC
$4.5M
1.0M
+100%
Added · +506K sh
Q1 2026
14VANGUARD PORTFOLIO MANAGEMENT LLC
$4.3M
977K
New
+977K sh
Q1 2026
15Diametric Capital, LP
$4.2M
954K
+29%
Added · +216K sh
Q1 2026
16NORTHERN TRUST CORP
$4.1M
938K
+26%
Added · +192K sh
Q1 2026
17CHARLES SCHWAB INVESTMENT MANAGEMENT INC
$4.0M
897K
+1.3%
Added · +11K sh
Q1 2026
18BNP Paribas Asset Management Holding S.A.
$3.9M
887K
−6.0%
Reduced · −57K sh
Q1 2026
19CITADEL ADVISORS LLC
$3.4M
768K
−55%
Reduced · −958K sh
Q1 2026
20VANGUARD FIDUCIARY TRUST CO
$3.3M
753K
New
+753K sh
Q1 2026
21JANE STREET GROUP, LLC
$3.0M
684K
−57%
Reduced · −902K sh
Q1 2026
22GROUP ONE TRADING LLC
$2.6M
596K
+34%
Added · +151K sh
Q1 2026
23GOLDMAN SACHS GROUP INC
$2.3M
527K
−69%
Reduced · −1.2M sh
Q1 2026
24Shay Capital LLC
$1.9M
430K
−26%
Reduced · −150K sh
Q1 2026
25Rathbones Group PLC
$1.7M
387K
−3.3%
Reduced · −13K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Fund activity: latest quarter

Opened (NEW)
6
funds
Added
20
funds
Reduced
14
funds
Exited
0
funds

Funds that own ASPI also own

CompanyCo-held byCombined value
MICROSOFT CORPMSFT50 funds$14.3B
BROADCOM INCAVGO50 funds$8.0B
META PLATFORMS INC-CLASS AMETA50 funds$7.8B
TESLA INCTSLA50 funds$4.8B
ELI LILLY & COLLY50 funds$4.6B
UNITEDHEALTH GROUP INCUNH50 funds$1.8B
UBER TECHNOLOGIES INCUBER50 funds$1.8B
NVIDIA CORPNVDA49 funds$21.7B
ALPHABET INC-CL AGOOGL49 funds$9.6B
VISA INC-CLASS A SHARESV49 funds$3.7B
MASTERCARD INC - AMA49 funds$3.4B
CITIGROUP INCC49 funds$1.4B

Ranked by how many of ASPI's institutional holders also hold each name, a cross-fund conviction signal.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$882K
1 insiders
Sells · 180d
$46K
1 insiders
Net
$836K
2 P/S txns
Signal
Net Buying
open-market
DateInsiderRoleActionSharesValue
Mar 6, 2026Ainscow RobertCOOSell (S)8K$46K
Mar 2, 2026Mann Paul ElliotExecutive ChairmanBuy (S)162K$882K
Dec 18, 2025Kiessling HeatherChief Financial OfficerSell (S)80K$464K
Dec 8, 2025Ainscow RobertInterim CEO and COOSell (S)8K$52K
Dec 1, 2025Mann Paul ElliotExecutive Chairman, DirectorSell (S)162K$932K
Nov 25, 2025Mann Paul ElliotExecutive Officer, DirectorSell (S)50K$289K
Nov 25, 2025Ainscow RobertInterim CEO and COOSell (S)25K$144K
Nov 17, 2025Ainscow RobertInterim CEO and COOSell (S)68K$507K
Nov 17, 2025Mann Paul ElliotExecutive Officer, DirectorSell (S)113K$845K
Oct 14, 2025Ainscow RobertInterim CEO and COOSell (S)23K$306K
Sep 30, 2025Gorley MichaelDirectorSell (S)64K$624K
Sep 15, 2025Wider ToddDirectorSell (S)74K$649K

Institutional ownership over time

138 funds+88 since Q3 2024
070140Q3 2024Q1 2025Q3 2025Q1 2026
funds holding aggregate valuelatest $261.2M

Recent filings

15 shown

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Ask your agent what changed in ASPI

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/ASPI/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for ASPI.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for ASPI. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.