ASPI

ASP Isotopes Inc.

Insider trading activity for ASP Isotopes Inc., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$2.8M

net selling

Bought(0 · 0 insiders): $0
Sold(11 · 6 insiders): $2.8M

Past 6 months

-$5.2M

net selling

Bought(0 · 0 insiders): $0
Sold(18 · 7 insiders): $5.2M

Past 12 months

-$10.4M

net selling

Bought(0 · 0 insiders): $0
Sold(30 · 7 insiders): $10.4M

Transaction history

The 75 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 8	Ainscow Robert	COO	SSELL◷	8,438	$4.29	$36.2K	-0.4%	Open the original filing on SEC.gov
Sep 4	Mann Paul Elliot	Chairman and CEO	SSELL◷	83,759	$4.10	$343.4K	-0.9%	Open the original filing on SEC.gov
Sep 3	Mann Paul Elliot	Chairman and CEO	SSELL◷	83,758	$3.92	$328.3K	-0.9%	Open the original filing on SEC.gov
Sep 2	Ainscow Robert	COO	SSELL◷	25,000	$3.91	$97.6K	-1.1%	Open the original filing on SEC.gov
Sep 2	Ainscow Donald George	EVP, Gen Counsel,…	SSELL	23,678	$3.89	$92.1K	-3.0%	Open the original filing on SEC.gov
Sep 2	Mann Paul Elliot	Chairman and CEO	SSELL◷	83,758	$3.91	$327.5K	-0.9%	Open the original filing on SEC.gov
Jul 1	Kiessling Heather	Chief Financial Officer	SSELL◷	23,124	$6.28	$145.2K	-1.5%	Open the original filing on SEC.gov
Jun 30	Wider Todd	Director	SSELL	50,000	$6.12	$306K	-6.9%	Open the original filing on SEC.gov
Jun 30	Gorley Michael	Director	SSELL	30,000	$6.27	$188.1K	-25.4%	Open the original filing on SEC.gov
Jun 30	Ainscow Donald George	EVP, Gen Counsel,…	SSELL	100,000	$6.14	$614K	-11.1%	Open the original filing on SEC.gov
Jun 29	Wider Todd	Director	SSELL	50,000	$6.25	$312.5K	-6.5%	Open the original filing on SEC.gov
Jun 8	Ainscow Robert	COO	SSELL◷	8,438	$7.00	$59.1K	-0.4%	Open the original filing on SEC.gov
Jun 3	Mann Paul Elliot	Chairman and CEO	SSELL◷	83,759	$7.76	$650K	-0.9%	Open the original filing on SEC.gov
Jun 2	Mann Paul Elliot	Chairman and CEO	SSELL◷	83,758	$8.29	$694.4K	-0.9%	Open the original filing on SEC.gov
Jun 1	Mann Paul Elliot	Chairman and CEO	SSELL◷	83,758	$7.88	$660K	-0.9%	Open the original filing on SEC.gov
May 28	Mann Paul Elliot	Chairman and CEO	AGRANT◷	2.2M	—	—	+29.4%	Open the original filing on SEC.gov
May 28	Ainscow Robert	Chief Operating Officer	AGRANT	800,000	—	—	+53.7%	Open the original filing on SEC.gov
May 28	Ainscow Donald George	EVP, Gen Counsel,…	AGRANT	400,000	—	—	+80.0%	Open the original filing on SEC.gov
May 28	Kiessling Heather	Chief Financial Officer	AGRANT	840,000	—	—	+118.4%	Open the original filing on SEC.gov
Apr 16	Ainscow Robert	COO	SSELL◷	22,500	$5.21	$117.1K	-1.5%	Open the original filing on SEC.gov
Apr 16	Moore Duncan	Director	SSELL◷	11,642	$5.21	$60.6K	-1.1%	Open the original filing on SEC.gov
Apr 15	Kiessling Heather	Chief Financial Officer	SSELL◷	23,124	$5.48	$126.7K	-3.2%	Open the original filing on SEC.gov
Mar 6	Ainscow Robert	COO	SSELL◷	8,438	$5.44	$45.9K	-0.5%	Open the original filing on SEC.gov
Mar 6	Ainscow Robert	COO	SSELL◷	25,000	$4.51	$112.8K	-1.6%	Open the original filing on SEC.gov
Mar 2	Mann Paul Elliot	Executive Chairman	SSELL◷	162,153	$5.44	$881.5K	+2.2%	Open the original filing on SEC.gov
Dec 18, 2025	Wider Todd	Director	AGRANT	36,548	—	—	+5.0%	Open the original filing on SEC.gov
Dec 18, 2025	Ryan Robert John Andrew	Director	AGRANT	36,548	—	—	+5.9%	Open the original filing on SEC.gov
Dec 18, 2025	Hunter Ralph L. JR	Director	AGRANT	36,548	—	—	+349.1%	Open the original filing on SEC.gov
Dec 18, 2025	Gorley Michael	Director	AGRANT	36,548	—	—	+44.9%	Open the original filing on SEC.gov
Dec 18, 2025	Kiessling Heather	Chief Financial Officer	SSELL	80,000	$5.80	$463.8K	-9.8%	Open the original filing on SEC.gov
Dec 18, 2025	Moore Duncan	Director	AGRANT◷	36,548	—	—	+3.6%	Open the original filing on SEC.gov
Dec 8, 2025	Ainscow Robert	Interim CEO and COO	SSELL◷	8,438	$6.20	$52.3K	-0.5%	Open the original filing on SEC.gov
Dec 1, 2025	Mann Paul Elliot	Executive Chairman	SSELL◷	162,153	$5.75	$932.9K	-2.1%	Open the original filing on SEC.gov
Nov 25, 2025	Ainscow Robert	Interim CEO and COO	SSELL◷	25,000	$5.77	$144.2K	-1.6%	Open the original filing on SEC.gov
Nov 25, 2025	Mann Paul Elliot	Executive Officer	SSELL◷	50,000	$5.77	$288.5K	-0.6%	Open the original filing on SEC.gov
Nov 17, 2025	Ainscow Robert	Interim CEO and COO	SSELL◷	67,500	$7.51	$506.7K	-4.1%	Open the original filing on SEC.gov
Nov 17, 2025	Mann Paul Elliot	Executive Officer	SSELL◷	112,500	$7.51	$844.5K	-1.4%	Open the original filing on SEC.gov
Nov 12, 2025	Wider Todd	Director	AGRANT	25,469	—	—	+3.6%	Open the original filing on SEC.gov
Nov 12, 2025	Moore Duncan	Director	AGRANT◷	25,469	—	—	+2.6%	Open the original filing on SEC.gov
Oct 14, 2025	Ainscow Robert	Interim CEO and COO	SSELL◷	22,500	$13.60	$306K	-1.4%	Open the original filing on SEC.gov
Sep 30, 2025	Gorley Michael	Director	SSELL	64,000	$9.75	$624.2K	-44.0%	Open the original filing on SEC.gov
Sep 15, 2025	Wider Todd	Director	SSELL	74,108	$8.76	$648.8K	-9.4%	Open the original filing on SEC.gov
Sep 14, 2025	Wider Todd	Director	MEXER◆	96,000	—	—	—	Open the original filing on SEC.gov
Sep 14, 2025	Wider Todd	Director	FTAX	21,892	$8.77	$192K	-2.7%	Open the original filing on SEC.gov
Sep 14, 2025	Wider Todd	Director	MEXER	96,000	$2.00	$192K	+13.5%	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	MEXER◷◆	135,000	—	—	—	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	MEXER◷◆	12,000	—	—	—	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	MEXER◷◆	150,000	—	—	—	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	FTAX◷	31,652	$8.53	$270K	-1.9%	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	MEXER◷	135,000	$2.00	$270K	+8.6%	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	FTAX◷	2,813	$8.53	$24K	-0.2%	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	MEXER◷	12,000	$2.00	$24K	+0.8%	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	FTAX◷	4,396	$8.53	$37.5K	-0.3%	Open the original filing on SEC.gov
Sep 9, 2025	Ainscow Robert	Chief Operating Officer	MEXER◷	150,000	$0.25	$37.5K	+10.6%	Open the original filing on SEC.gov
Sep 9, 2025	Mann Paul Elliot	Chief Executive Officer	MEXER◷◆	1M	—	—	—	Open the original filing on SEC.gov
Sep 9, 2025	Mann Paul Elliot	Chief Executive Officer	MEXER◷◆	216,000	—	—	—	Open the original filing on SEC.gov
Sep 9, 2025	Mann Paul Elliot	Chief Executive Officer	SSELL◷	81,077	$8.39	$680.1K	-1.0%	Open the original filing on SEC.gov
Sep 9, 2025	Mann Paul Elliot	Chief Executive Officer	FTAX◷	234,466	$8.53	$2M	-2.8%	Open the original filing on SEC.gov
Sep 9, 2025	Mann Paul Elliot	Chief Executive Officer	MEXER◷	1M	$2.00	$2M	+13.5%	Open the original filing on SEC.gov
Sep 9, 2025	Mann Paul Elliot	Chief Executive Officer	FTAX◷	50,644	$8.53	$432K	-0.7%	Open the original filing on SEC.gov
Sep 9, 2025	Mann Paul Elliot	Chief Executive Officer	MEXER◷	216,000	$2.00	$432K	+3.0%	Open the original filing on SEC.gov
Sep 8, 2025	Ainscow Robert	Chief Operating Officer	SSELL◷	8,438	$8.53	$71.9K	-0.6%	Open the original filing on SEC.gov
Sep 8, 2025	Mann Paul Elliot	Chief Executive Officer	SSELL◷	81,076	$8.53	$691.4K	-1.1%	Open the original filing on SEC.gov
Sep 6, 2025	Hunter Ralph L. JR	Director	AGRANT	10,470	—	—	—	Open the original filing on SEC.gov
Aug 29, 2025	Moore Duncan	Director	SSELL	75,000	$9.28	$696.2K	-7.0%	Open the original filing on SEC.gov
Aug 1, 2025	Ainscow Donald George	EVP, Gen Counsel,…	AGRANT	400,000	—	—	+400.0%	Open the original filing on SEC.gov
Apr 17, 2025	Ainscow Robert	Chief Operating Officer	SSELL◷	66,668	$5.62	$374.8K	-4.5%	Open the original filing on SEC.gov
Apr 17, 2025	Mann Paul Elliot	Chief Executive Officer	SSELL◷	316,666	$5.62	$1.8M	-4.2%	Open the original filing on SEC.gov
Apr 16, 2025	Ainscow Robert	Chief Operating Officer	SSELL◷	66,666	$5.45	$363K	-4.3%	Open the original filing on SEC.gov
Apr 16, 2025	Mann Paul Elliot	Chief Executive Officer	SSELL◷	316,667	$5.45	$1.7M	-4.0%	Open the original filing on SEC.gov
Apr 15, 2025	Ainscow Robert	Chief Operating Officer	SSELL◷	66,666	$5.75	$383.6K	-4.1%	Open the original filing on SEC.gov
Apr 15, 2025	Mann Paul Elliot	Chief Executive Officer	SSELL◷	316,667	$5.75	$1.8M	-3.8%	Open the original filing on SEC.gov
Apr 14, 2025	Ainscow Robert	Chief Operating Officer	AGRANT	400,000	—	—	+32.8%	Open the original filing on SEC.gov
Apr 14, 2025	Kiessling Heather	Chief Financial Officer	AGRANT	400,000	—	—	+97.0%	Open the original filing on SEC.gov
Apr 14, 2025	Mann Paul Elliot	Chief Executive Officer	AGRANT	1.4M	—	—	+21.1%	Open the original filing on SEC.gov

SSELL◷$36.2K

Ainscow Robert · COOSep 8

8,438 sh @ $4.29 · -0.4% own

SSELL◷$343.4K

Mann Paul Elliot · Chairman and CEOSep 4

83,759 sh @ $4.10 · -0.9% own

SSELL◷$328.3K

Mann Paul Elliot · Chairman and CEOSep 3

83,758 sh @ $3.92 · -0.9% own

SSELL◷$97.6K

Ainscow Robert · COOSep 2

25,000 sh @ $3.91 · -1.1% own

SSELL$92.1K

Ainscow Donald George · EVP, Gen Counsel,…Sep 2

23,678 sh @ $3.89 · -3.0% own

SSELL◷$327.5K

Mann Paul Elliot · Chairman and CEOSep 2

83,758 sh @ $3.91 · -0.9% own

SSELL◷$145.2K

Kiessling Heather · Chief Financial…Jul 1

23,124 sh @ $6.28 · -1.5% own

SSELL$306K

Wider Todd · DirectorJun 30

50,000 sh @ $6.12 · -6.9% own

SSELL$188.1K

Gorley Michael · DirectorJun 30

30,000 sh @ $6.27 · -25.4% own

SSELL$614K

Ainscow Donald George · EVP, Gen Counsel,…Jun 30

100,000 sh @ $6.14 · -11.1% own

SSELL$312.5K

Wider Todd · DirectorJun 29

50,000 sh @ $6.25 · -6.5% own

SSELL◷$59.1K

Ainscow Robert · COOJun 8

8,438 sh @ $7.00 · -0.4% own

SSELL◷$650K

Mann Paul Elliot · Chairman and CEOJun 3

83,759 sh @ $7.76 · -0.9% own

SSELL◷$694.4K

Mann Paul Elliot · Chairman and CEOJun 2

83,758 sh @ $8.29 · -0.9% own

SSELL◷$660K

Mann Paul Elliot · Chairman and CEOJun 1

83,758 sh @ $7.88 · -0.9% own

AGRANT◷—

Mann Paul Elliot · Chairman and CEOMay 28

2.2M sh · +29.4% own

AGRANT—

Ainscow Robert · Chief Operating…May 28

800,000 sh · +53.7% own

AGRANT—

Ainscow Donald George · EVP, Gen Counsel,…May 28

400,000 sh · +80.0% own

AGRANT—

Kiessling Heather · Chief Financial…May 28

840,000 sh · +118.4% own

SSELL◷$117.1K

Ainscow Robert · COOApr 16

22,500 sh @ $5.21 · -1.5% own

SSELL◷$60.6K

Moore Duncan · DirectorApr 16

11,642 sh @ $5.21 · -1.1% own

SSELL◷$126.7K

Kiessling Heather · Chief Financial…Apr 15

23,124 sh @ $5.48 · -3.2% own

SSELL◷$45.9K

Ainscow Robert · COOMar 6

8,438 sh @ $5.44 · -0.5% own

SSELL◷$112.8K

Ainscow Robert · COOMar 6

25,000 sh @ $4.51 · -1.6% own

SSELL◷$881.5K

Mann Paul Elliot · Executive ChairmanMar 2

162,153 sh @ $5.44 · +2.2% own

AGRANT—

Wider Todd · DirectorDec 18, 2025

36,548 sh · +5.0% own

AGRANT—

Ryan Robert John Andrew · DirectorDec 18, 2025

36,548 sh · +5.9% own

AGRANT—

Hunter Ralph L. JR · DirectorDec 18, 2025

36,548 sh · +349.1% own

AGRANT—

Gorley Michael · DirectorDec 18, 2025

36,548 sh · +44.9% own

SSELL$463.8K

Kiessling Heather · Chief Financial…Dec 18, 2025

80,000 sh @ $5.80 · -9.8% own

AGRANT◷—

Moore Duncan · DirectorDec 18, 2025

36,548 sh · +3.6% own

SSELL◷$52.3K

Ainscow Robert · Interim CEO and…Dec 8, 2025

8,438 sh @ $6.20 · -0.5% own

SSELL◷$932.9K

Mann Paul Elliot · Executive ChairmanDec 1, 2025

162,153 sh @ $5.75 · -2.1% own

SSELL◷$144.2K

Ainscow Robert · Interim CEO and…Nov 25, 2025

25,000 sh @ $5.77 · -1.6% own

SSELL◷$288.5K

Mann Paul Elliot · Executive OfficerNov 25, 2025

50,000 sh @ $5.77 · -0.6% own

SSELL◷$506.7K

Ainscow Robert · Interim CEO and…Nov 17, 2025

67,500 sh @ $7.51 · -4.1% own

SSELL◷$844.5K

Mann Paul Elliot · Executive OfficerNov 17, 2025

112,500 sh @ $7.51 · -1.4% own

AGRANT—

Wider Todd · DirectorNov 12, 2025

25,469 sh · +3.6% own

AGRANT◷—

Moore Duncan · DirectorNov 12, 2025

25,469 sh · +2.6% own

SSELL◷$306K

Ainscow Robert · Interim CEO and…Oct 14, 2025

22,500 sh @ $13.60 · -1.4% own

SSELL$624.2K

Gorley Michael · DirectorSep 30, 2025

64,000 sh @ $9.75 · -44.0% own

SSELL$648.8K

Wider Todd · DirectorSep 15, 2025

74,108 sh @ $8.76 · -9.4% own

MEXER◆—

Wider Todd · DirectorSep 14, 2025

96,000 sh

FTAX$192K

Wider Todd · DirectorSep 14, 2025

21,892 sh @ $8.77 · -2.7% own

MEXER$192K

Wider Todd · DirectorSep 14, 2025

96,000 sh @ $2.00 · +13.5% own

MEXER◷◆—