DBHL

Deep Isolation Nuclear, Inc.

Insider trading activity for Deep Isolation Nuclear, 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

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 12 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Transaction history

The 44 most recent Form 4 transactions.

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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 16	Hunter Ralph L. JR	Director	AGRANT	70,000	—	—	+161.5%	Open the original filing on SEC.gov
Sep 16	Steele Christa	Director	AGRANT	70,000	—	—	+161.5%	Open the original filing on SEC.gov
Sep 16	Goldman Tepper Leslie	Director	AGRANT	70,000	—	—	+64.7%	Open the original filing on SEC.gov
Sep 16	Hornbaker Renee J	Director	AGRANT	70,000	—	—	+161.5%	Open the original filing on SEC.gov
Sep 16	Angell Jonathon	Director	AGRANT	70,000	—	—	+18.0%	Open the original filing on SEC.gov
May 27	Whitten-Doolin Paula…	General Counsel	AGRANT◆	25,000	—	—	—	Open the original filing on SEC.gov
May 27	Whitten-Doolin Paula…	General Counsel	AGRANT	75,000	—	—	—	Open the original filing on SEC.gov
May 27	Nelson Joseph Eugene	Chief Financial Officer	AGRANT◆	40,000	—	—	—	Open the original filing on SEC.gov
May 27	Nelson Joseph Eugene	Chief Financial Officer	AGRANT	100,000	—	—	—	Open the original filing on SEC.gov
Jan 21	Hunter Ralph L. JR	Director	AGRANT	43,333	—	—	—	Open the original filing on SEC.gov
Nov 19, 2025	Goldman Tepper Leslie	Director	AGRANT	43,333	—	—	+66.8%	Open the original filing on SEC.gov
Nov 19, 2025	Parker Christopher…	CCO	AGRANT◆	15,364	—	—	—	Open the original filing on SEC.gov
Nov 19, 2025	Parker Christopher…	CCO	AGRANT	5,121	—	—	+44.4%	Open the original filing on SEC.gov
Nov 19, 2025	McCallum Sophie	Chief of Staff, Corp.…	AGRANT◆	20,393	—	—	—	Open the original filing on SEC.gov
Nov 19, 2025	McCallum Sophie	Chief of Staff, Corp.…	AGRANT	6,798	—	—	+68.9%	Open the original filing on SEC.gov
Nov 19, 2025	Steele Christa	Director	AGRANT	43,333	—	—	—	Open the original filing on SEC.gov
Nov 19, 2025	Hornbaker Renee J	Director	AGRANT	43,333	—	—	—	Open the original filing on SEC.gov
Nov 19, 2025	Muller Elizabeth	Director, 10% Owner	AGRANT	43,333	—	—	+0.4%	Open the original filing on SEC.gov
Nov 19, 2025	Sloane Jesse	EVP Engineering	AGRANT◆	2,215	—	—	—	Open the original filing on SEC.gov
Nov 19, 2025	Sloane Jesse	EVP Engineering	AGRANT	738	—	—	+5.9%	Open the original filing on SEC.gov
Nov 19, 2025	Angell Jonathon	Director	AGRANT	43,333	—	—	+12.5%	Open the original filing on SEC.gov
Oct 17, 2025	Hornbaker Renee J	Director	AGRANT◆	10,833	—	—	—	Open the original filing on SEC.gov
Oct 17, 2025	Hornbaker Renee J	Director	AGRANT	32,500	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	McCallum Sophie	Chief of Staff, Corp.…	AGRANT◆	29,608	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	McCallum Sophie	Chief of Staff, Corp.…	AGRANT	9,869	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Goldman Tepper Leslie	Director	AGRANT◆	10,833	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Goldman Tepper Leslie	Director	AGRANT	32,500	—	—	+49.9%	Open the original filing on SEC.gov
Oct 1, 2025	Sloane Jesse	EVP Engineering	AGRANT◆	37,785	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Sloane Jesse	EVP Engineering	AGRANT	12,595	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Parker Christopher…	CCO	AGRANT◆	34,637	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Parker Christopher…	CCO	AGRANT	11,546	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Baltzer Rodney	President and CEO	AGRANT◆	28,333	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Baltzer Rodney	President and CEO	AGRANT	85,000	—	—	+8.6%	Open the original filing on SEC.gov
Oct 1, 2025	Angell Jonathon	Director	AGRANT◆	10,833	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Angell Jonathon	Director	AGRANT	32,500	—	—	+9.4%	Open the original filing on SEC.gov
Oct 1, 2025	Airhart Steven	Pres, Freestone Env Svcs	AGRANT◆	33,329	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Airhart Steven	Pres, Freestone Env Svcs	AGRANT	11,110	—	—	+2.9%	Open the original filing on SEC.gov
Oct 1, 2025	Steele Christa	Director	AGRANT◆	10,833	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Steele Christa	Director	AGRANT	32,500	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Muller Elizabeth	Director, 10% Owner	AGRANT◆	10,833	—	—	—	Open the original filing on SEC.gov
Oct 1, 2025	Muller Elizabeth	Director, 10% Owner	AGRANT	32,500	—	—	+0.3%	Open the original filing on SEC.gov
Jul 23, 2025	Tompkins Mark N.	See Remarks	JOTHER	2.8M	—	—	-60.0%	Open the original filing on SEC.gov
Jul 16, 2025	Jacobs Ian Seth	President, CEO, CFO,…	PBUY	25,000	$0.0001	$3	+10.0%	Open the original filing on SEC.gov
Jul 16, 2025	Tompkins Mark N.	Director, 10% Owner	SSELL	25,000	$0.0001	$3	-0.5%	Open the original filing on SEC.gov

AGRANT—

Hunter Ralph L. JR · DirectorSep 16

70,000 sh · +161.5% own

AGRANT—

Steele Christa · DirectorSep 16

70,000 sh · +161.5% own

AGRANT—

Goldman Tepper Leslie · DirectorSep 16

70,000 sh · +64.7% own

AGRANT—

Hornbaker Renee J · DirectorSep 16

70,000 sh · +161.5% own

AGRANT—

Angell Jonathon · DirectorSep 16

70,000 sh · +18.0% own

AGRANT◆—

Whitten-Doolin Paula… · General CounselMay 27

25,000 sh

AGRANT—

Whitten-Doolin Paula… · General CounselMay 27

75,000 sh

AGRANT◆—

Nelson Joseph Eugene · Chief Financial…May 27

40,000 sh

AGRANT—

Nelson Joseph Eugene · Chief Financial…May 27

100,000 sh

AGRANT—

Hunter Ralph L. JR · DirectorJan 21

43,333 sh

AGRANT—

Goldman Tepper Leslie · DirectorNov 19, 2025

43,333 sh · +66.8% own

AGRANT◆—

Parker Christopher… · CCONov 19, 2025

15,364 sh

AGRANT—

Parker Christopher… · CCONov 19, 2025

5,121 sh · +44.4% own

AGRANT◆—

McCallum Sophie · Chief of Staff,…Nov 19, 2025

20,393 sh

AGRANT—

McCallum Sophie · Chief of Staff,…Nov 19, 2025

6,798 sh · +68.9% own

AGRANT—

Steele Christa · DirectorNov 19, 2025

43,333 sh

AGRANT—

Hornbaker Renee J · DirectorNov 19, 2025

43,333 sh

AGRANT—

Muller Elizabeth · Director, 10%…Nov 19, 2025

43,333 sh · +0.4% own

AGRANT◆—

Sloane Jesse · EVP EngineeringNov 19, 2025

2,215 sh

AGRANT—

Sloane Jesse · EVP EngineeringNov 19, 2025

738 sh · +5.9% own

AGRANT—

Angell Jonathon · DirectorNov 19, 2025

43,333 sh · +12.5% own

AGRANT◆—

Hornbaker Renee J · DirectorOct 17, 2025

10,833 sh

AGRANT—

Hornbaker Renee J · DirectorOct 17, 2025

32,500 sh

AGRANT◆—

McCallum Sophie · Chief of Staff,…Oct 1, 2025

29,608 sh

AGRANT—

McCallum Sophie · Chief of Staff,…Oct 1, 2025

9,869 sh

AGRANT◆—

Goldman Tepper Leslie · DirectorOct 1, 2025

10,833 sh

AGRANT—

Goldman Tepper Leslie · DirectorOct 1, 2025

32,500 sh · +49.9% own

AGRANT◆—

Sloane Jesse · EVP EngineeringOct 1, 2025

37,785 sh

AGRANT—

Sloane Jesse · EVP EngineeringOct 1, 2025

12,595 sh

AGRANT◆—

Parker Christopher… · CCOOct 1, 2025

34,637 sh

AGRANT—

Parker Christopher… · CCOOct 1, 2025

11,546 sh

AGRANT◆—

Baltzer Rodney · President and CEOOct 1, 2025

28,333 sh

AGRANT—

Baltzer Rodney · President and CEOOct 1, 2025

85,000 sh · +8.6% own

AGRANT◆—

Angell Jonathon · DirectorOct 1, 2025

10,833 sh

AGRANT—

Angell Jonathon · DirectorOct 1, 2025

32,500 sh · +9.4% own

AGRANT◆—

Airhart Steven · Pres, Freestone…Oct 1, 2025

33,329 sh

AGRANT—

Airhart Steven · Pres, Freestone…Oct 1, 2025

11,110 sh · +2.9% own

AGRANT◆—

Steele Christa · DirectorOct 1, 2025

10,833 sh

AGRANT—

Steele Christa · DirectorOct 1, 2025

32,500 sh

AGRANT◆—

Muller Elizabeth · Director, 10%…Oct 1, 2025

10,833 sh

AGRANT—

Muller Elizabeth · Director, 10%…Oct 1, 2025

32,500 sh · +0.3% own

JOTHER—

Tompkins Mark N. · See RemarksJul 23, 2025

2.8M sh · -60.0% own

PBUY$3

Jacobs Ian Seth · President, CEO,…Jul 16, 2025

25,000 sh @ $0.0001 · +10.0% own

SSELL$3

Tompkins Mark N. · Director, 10%…Jul 16, 2025

25,000 sh @ $0.0001 · -0.5% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

2 of 29 filings we hold were filed after the two-business-day deadline. The furthest past the deadline was 65 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Jan 21	Apr 27	Hunter Ralph L. JRDirector	65days · about 3 months	—	Filing ↗
Oct 1, 2025	Oct 6, 2025	Muller ElizabethDirector, 10% Owner	1day	—	Filing ↗

Hunter Ralph L. JRDirector

65days · about 3 months

Traded Jan 21 · filed Apr 27Filing ↗

Muller ElizabethDirector, 10% Owner

1day

Traded Oct 1, 2025 · filed Oct 6, 2025Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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