Kerri M. Langlais - 09 Dec 2025 Form 4 Insider Report for TERAWULF INC. (WULF)

Reporting relationship: Chief Strategy Officer, Director
Issuer ticker: WULF
Reported as of: 09 Dec 2025
Net transaction value: -$251,000
SEC form: 4
Accepted by SEC: 11 Dec 2025, 18:34:39 UTC
Prior SEC filing: 01 Aug 2025
Next SEC filing: 02 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Kerri M. Langlais

Key filing fact

Kerri M. Langlais filed Form 4 for TERAWULF INC. (WULF) on 11 Dec 2025.

Key facts

This page summarizes Kerri M. Langlais's Form 4 filing for TERAWULF INC. (WULF).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 11 Dec 2025, 18:34.

Change

Previous filing in this sequence was filed on 01 Aug 2025.
Current net transaction value: -$251,000.

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

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001877257 Primary reporting owner

Langlais Kerri M.

Relationship: Chief Strategy Officer, Director
Address: C/O TERAWULF INC., 9 FEDERAL STREET, EASTON
Signature: /s/ Kerri M. Langlais
Signature date: 11 Dec 2025

Reported non-derivative transactions

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

WULF transaction

Common stock, $0.001 par value per share

Options Exercise

Transaction value
Shares: +35,629
Change %: +1%
Price
Shares after: 3,572,105
Date: 09 Dec 2025
Ownership: Direct
Footnotes: F1

WULF holding

Common stock, $0.001 par value per share

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 864,701
Date: 09 Dec 2025
Ownership: By Langlais Family 2021 GST Trust

Reported derivative securities

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

WULF transaction Derivative

Series A Convertible Preferred Stock

Options Exercise

Transaction value: $251,000
Shares: -251
Change %: -100%
Price: $1000.00
Shares after: 0
Date: 09 Dec 2025
Ownership: Direct
Underlying class: Common stock, $0.001 par value per share
Underlying amount: 35,629
Exercise price
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

As of the date of the event requiring the filing of this report, the 251 shares of Series A Convertible Preferred Stock (the "Preferred Stock") were converted into 35,629 shares of common stock, par value $0.001 per share, via a mandatory conversion by the Issuer of all of the shares of its Preferred Stock pursuant to Sec. 10(c) of the Certificate of Designations of the Preferred Stock, at a conversion price of $10.00 per share of Preferred Stock, as previously disclosed on the Issuer's current report on Form 8-K filed on November 25, 2025.