Michael P. Tarnok - 18 May 2026 Form 3 Insider Report for Ionetix Corp / DE /

Reporting relationship
Director
Issuer ticker
N/A
Reported as of
18 May 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
3
Accepted by SEC
27 Jul 2026, 07:22:11 UTC
Prior SEC filing
24 Jun 2025
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Phieu Phun, as Attorney-in-Fact for Michael P. Tarnok

Key filing fact

Michael P. Tarnok filed Form 3 for Ionetix Corp / DE / on 27 Jul 2026.

Key facts

  • This page summarizes Michael P. Tarnok's Form 3 filing for Ionetix Corp / DE /.
  • 0 reported transactions and 6 derivative rows are listed below.
  • Accepted by SEC: 27 Jul 2026, 07:22.

Change

  • Previous filing in this sequence was filed on 24 Jun 2025.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (1)

CIK 0001413525 Primary reporting owner

Tarnok Michael P.

Relationship
Director
Address
C/O IONETIX CORPORATION, 3130 SOVEREIGN DRIVE, LANSING
Signature
/s/ Phieu Phun, as Attorney-in-Fact for Michael P. Tarnok
Signature date
27 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

No ticker holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
331,242
Date
18 May 2026
Ownership
Direct
Footnotes
F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

No ticker holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 May 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
4,179
Exercise price
$0.3800
Footnotes
F2
No ticker holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 May 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
9,401
Exercise price
$0.4200
Footnotes
F2
No ticker holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 May 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
25,070
Exercise price
$0.6200
Footnotes
F2
No ticker holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 May 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
25,070
Exercise price
$0.6200
Footnotes
F3
No ticker holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 May 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
25,070
Exercise price
$0.9800
Footnotes
F4
No ticker holding Derivative

Stock Option (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
18 May 2026
Ownership
Direct
Underlying class
Common Stock
Underlying amount
25,070
Exercise price
$0.9800
Footnotes
F5
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Represents shares of the Issuer's Common Stock received in connection with the merger of Ionetix Corporation ("Legacy Ionetix") with a subsidiary of the Issuer, which closed on April 9, 2026.

Footnote F2

The stock option is fully vested and exercisable.

Footnote F3

The stock option vests in 48 monthly installments, subject to a one-year cliff, with vesting commencing on March 17, 2023.

Footnote F4

The stock option vests in 48 monthly installments, subject to a one-year cliff, with vesting commencing on March 17, 2024.

Footnote F5

The stock option vests in 48 monthly installments, subject to a one-year cliff, with vesting commencing on March 17, 2025.

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