John M. Jansen plans $233K Oklo share sale

A Rule 144 filing reports John M. Jansen’s planned sale of 6,354 Oklo Class A shares valued at about $233,000.

Rhea-AI Filing Summary

Oklo Inc. (OKLO) received a notice that John M. Jansen, through Fidelity Brokerage Services LLC as broker, intends to sell 6,354 Class A shares under Rule 144. The planned sale has an indicated aggregate market value of $233,001.18, with 186,017,650 Class A shares outstanding and an approximate sale date of September 14, 2026. The shares were acquired from the issuer on March 6, 2026 via restricted stock vesting as compensation.

Key Figures

Shares to be sold: 6,354 shares Aggregate market value: $233,001.18 Shares outstanding: 186,017,650 shares +2 more

5 metrics

Shares to be sold 6,354 shares Class A shares proposed to be sold for John M. Jansen under Rule 144

Aggregate market value $233,001.18 Value of the 6,354 Class A shares proposed to be sold

Shares outstanding 186,017,650 shares Class A shares outstanding for Oklo Inc. noted in the filing

Approximate sale date September 14, 2026 Planned date for the Rule 144 sale of Class A shares

Acquisition date March 6, 2026 Date the 6,354 shares were acquired via restricted stock vesting

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Class A | 03/06/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for John"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Form 144 filing disclose for OKLO?

It discloses that John M. Jansen plans to sell 6,354 Class A shares of Oklo Inc. (OKLO) under Rule 144 through Fidelity Brokerage Services LLC, with an approximate sale date of September 14, 2026.

How many Oklo (OKLO) shares are covered by this Form 144?

The notice covers 6,354 Class A shares of Oklo Inc. to be sold for the account of John M. Jansen through Fidelity Brokerage Services LLC as broker.

What is the aggregate market value of the OKLO shares in this planned Rule 144 sale?

The filing lists an aggregate market value of $233,001.18 for the 6,354 Class A shares of Oklo Inc. proposed to be sold under Rule 144.

When were the Oklo (OKLO) shares being sold under Form 144 acquired?

The 6,354 Class A shares were acquired on March 6, 2026 via restricted stock vesting from Oklo Inc., with the acquisition described as compensation.

What is the approximate date of sale for the OKLO shares in this Form 144?

The notice states an approximate sale date of September 14, 2026 for the proposed Rule 144 sale of Oklo Inc. Class A shares.

How many Oklo (OKLO) Class A shares are outstanding according to this filing?

The filing reports 186,017,650 Class A shares outstanding for Oklo Inc., noted in connection with the Rule 144 sale; this is a baseline figure, not the amount being sold.

Who is executing the planned sale of OKLO shares under Rule 144?

The planned Rule 144 sale is to be executed through Fidelity Brokerage Services LLC, with the Form 144 signed by /s/ Wade Moss as a duly authorized representative and attorney-in-fact for John M. Jansen.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/14/2026 - 03:33 PM Accepted by SEC EDGAR 09/14/2026 - 03:33 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002021774
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Oklo Inc.
SEC File Number	001-40583
Address of Issuer	3190 CORONADO DR. SANTA CLARA CALIFORNIA 95054
Phone	650-550-0127
Name of Person for Whose Account the Securities are To Be Sold	Jansen John M
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Director

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Class A	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	6354	233001.18	186017650	09/14/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Class A	03/06/2026	Restricted Stock Vesting	Issuer			6354	03/06/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/14/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/Wade Moss, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for John M. Jansen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)