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ASPI · Asp Isotopes Inc.
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TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475
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ASPI

ASP Isotopes Inc.
PHARMA & BIOTECH · MISCELLANEOUS CHEMICAL PRODUCTS · CIK 0001921865
FORM 144 · 6☆ WATCH
INSIDER NET · 180D
-$3.9M
open-market buys minus sells, Form 4 codes P and S
INSIDER BUYERS · 180D
0
CONGRESS BUYERS · 1Y
0
FUNDS ADDED · QTR
114
13F, latest reported quarter
REVENUE GROWTH
+475.5%
XBRL, annual
NET MARGIN
-670.2%
SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST
INSIDERS
net -$3.9M over 180 days
-$1.6M over 90 days
below 76% of Pharma & Biotech
CONGRESS
no member of Congress has reported trading it
FUNDS
114 funds added or opened last quarter
more than 70% of Pharma & Biotech
REVENUE
+475.5% year over year
more than 93% of Pharma & Biotech
MARGIN
-670.2% net margin
below 84% of Pharma & Biotech
BUYBACKS
no share repurchases reported
SHORT
17.4% of shares outstanding short · 6.1 days to cover · settled 2026-07-31
more than 93% of Pharma & Biotech
THE SITUATION · EVERY LINE IS ONE RULE OVER ONE DATASET
Insiders are net sellers: -$3.9M across 7 people in 180 days.
114 funds added or opened positions in the latest 13F quarter, of 188 holders.
The year, with the filings on it
Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail
TOTAL 12M RETURN -55.0%
-55.0%12M
-59%-19%+22%+62%2025-092025-102025-122026-032026-052026-072026-09 2025-12-01 · Mann Paul Elliot sold $932.4K2026-03-02 · Mann Paul Elliot sold $882.1K2025-11-17 · Mann Paul Elliot sold $844.9K2026-06-02 · Mann Paul Elliot sold $694.4K2025-09-08 · Mann Paul Elliot sold $691.6K2025-09-09 · Mann Paul Elliot sold $680.2K2026-06-01 · Mann Paul Elliot sold $660.0K2026-06-03 · Mann Paul Elliot sold $650.0K2025-09-15 · Wider Todd sold $649.2K2025-09-30 · Gorley Michael sold $624.0K2026-06-30 · Ainscow Donald George sold $614.0K2025-11-17 · Ainscow Robert sold $506.9K2025-12-18 · Kiessling Heather sold $464.0K2026-06-29 · Wider Todd sold $312.5K2026-06-30 · Wider Todd sold $306.0K2025-10-14 · Ainscow Robert sold $306.0K2025-11-25 · Mann Paul Elliot sold $288.5K2026-06-30 · Gorley Michael sold $188.1K2026-07-01 · Kiessling Heather sold $145.2K2025-11-25 · Ainscow Robert sold $144.2K2026-04-15 · Kiessling Heather sold $126.7K2026-04-16 · Ainscow Robert sold $117.2K2026-03-06 · Ainscow Robert sold $112.8K2025-09-08 · Ainscow Robert sold $72.0K2026-04-16 · Moore Duncan sold $60.7K2026-06-08 · Ainscow Robert sold $59.1K2025-12-08 · Ainscow Robert sold $52.3K2026-03-06 · Ainscow Robert sold $45.9K2026-09-02 · Ainscow Robert filed to sell $94.5K2026-09-02 · Mann Paul Elliot filed to sell $316.6K2026-09-02 · Donald George Ainscow filed to sell $194.4K2026-06-30 · Ainscow Donald George filed to sell $622.0K2026-06-29 · Gorley Michael filed to sell $186.6K2026-06-29 · Todd Wider filed to sell $628.0K
INSIDER SELLFORM 144
INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY
Live price
Daily candles from TradingView, on their licence — no filings are marked on this one
WHY THIS NAME IS ON THE DESK
Insiders have filed to sell — before selling.
The record shows a net $3.9M sold by insiders over 180 days, 114 funds added last quarter, $2.0M in planned Form 144 sales. Every figure is a federal filing, dated the day it became public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector from the SEC's own SIC classification
UTHRCPIXMRNAREGNLLYALNYELFCITRMDGLDNAVRTXNUVL
Insider transactions
Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

Over the last 180 days, ASP Isotopes Inc. insiders sold a net $3.9M of stock across 61 Form 4 purchases and sales, with 0 insider(s) buying. Source: SEC Form 4 filings, as of 2026-09-04.

INSIDER
FILED
SHARES
VALUE
Kiessling Heather
Chief Financial Officer
SELL
2026-07-01
23,124.0
$145.2K
Ainscow Donald George
EVP, Gen Counsel, Secretary
SELL
2026-06-30
100,000.0
$614.0K
Gorley Michael
Director
SELL
2026-06-30
30,000.0
$188.1K
Wider Todd
Director
SELL
2026-06-30
50,000.0
$306.0K
Wider Todd
Director
SELL
2026-06-29
50,000.0
$312.5K
61 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 56 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders
13F · holdings as of the latest quarter funds have reported
BlackRock, Inc.
9,217,198.0 sh
$57.3M
Encompass Capital Advisors LLC
6,561,754.0 sh
$40.8M
VANGUARD CAPITAL MANAGEMENT LLC
4,982,953.0 sh
$31.0M
EXCHANGE TRADED CONCEPTS, LLC
4,511,018.0 sh
$28.1M
Rovida Investment Management Ltd
4,100,000.0 sh
$25.5M
SCHEDULE 13D/G
No 5%+ ownership filings
Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.
Planned sales · Form 144
Filed before the sale — intent, not a trade
Ainscow Robert
FILED 2026-09-02
$94.5K
Mann Paul Elliot
FILED 2026-09-02
$316.6K
Donald George Ainscow
FILED 2026-09-02
$194.4K
Ainscow Donald George
FILED 2026-06-30
$622.0K
Gorley Michael
FILED 2026-06-29
$186.6K
Fund concentration
N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show
City Different Investments Global Equity ETF
$1.1M POSITION · AS OF 2026-04-30
2.4%
Range Nuclear Renaissance Index ETF
$7.8M POSITION · AS OF 2026-02-28
0.9%
Pacer Data & Infrastructure Real Estate ETF
$2.7M POSITION · AS OF 2026-04-30
0.7%
Penn Capital Special Situations Small Cap Equity Fund
$256.8K POSITION · AS OF 2026-02-28
0.3%
Basic Materials Fund
$60.1K POSITION · AS OF 2026-03-31
0.2%
iShares Micro-Cap ETF
$1.3M POSITION · AS OF 2026-03-31
0.1%
SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK
Fundamentals
Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all
2025-122024-122023-122022-12
REVENUE$23.8M$4.1M$433.0K$0
GROSS PROFIT$3.4M$1.6M$139.0K$0
OPERATING INCOME$-59.9M$-26.4M$-16.0M$-5.1M
NET INCOME$-159.8M$-32.4M$-16.3M$-4.9M
EPS (DILUTED)-2.11-0.63-0.49—
OPERATING CASH FLOW$-37.8M$-16.7M$-5.4M$-2.9M
CASH$285.6M$61.9M——
LONG-TERM DEBT$1.5M$1.4M——
DIVIDENDS PAID$0$2.8M$0—
SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-04 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE
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Public filings, honestly analyzed. Official US government sources in one desk — every figure carries the date it was filed, and the methodology is published, backtest included.

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