[Form 4] Oklo Inc. Insider Trading Activity

Rhea-AI Filing Summary

Michael Stuart Klein, a director and reported 10% owner of Oklo Inc. (OKLO), reported sales of common stock on 09/22/2025. The Form 4 shows a sale of 40,000 shares at a weighted-average price of $133.3978 (shares sold in multiple transactions at prices ranging $133.255 to $133.57) leaving 160,000 shares beneficially owned, and a separate sale of 10,000 shares at $135.20 leaving 150,000 shares beneficially owned. The shares are held of record by M. Klein Associates, Inc., of which Mr. Klein is the controlling stockholder. The filing includes a signed authorization dated 09/24/2025 from M. Klein Associates, Inc.

Positive

• Timely and clear disclosure of insider transactions filed on Form 4 with transaction dates and prices
• Footnote provides transparency by stating the price range and offering to supply per-trade breakdowns on request

Negative

• Insider disposed of 50,000 shares (40,000 and 10,000 on 09/22/2025), which reduces the reporting person\'s holdings
• Post-sale beneficial ownership figures are reported (160,000 and 150,000) but the filing does not state percentage ownership of outstanding shares

Insights

Corporate Governance Expert

TL;DR: Director and significant shareholder disclosed routine stock sales; filing clarifies record holder and price range.

The Form 4 documents insider disposals by Michael Klein executed on 09/22/2025 and provides standard disclosure about record ownership through M. Klein Associates, Inc. The filing includes a weighted-average price and a footnote offering to provide detailed per-trade prices. This meets Section 16 transparency expectations and identifies the reporting person as both a director and a 10% owner, which is relevant for governance monitoring.

Securities Analyst

TL;DR: Insider sold 50,000 shares in two transactions; disclosure is clear but does not state intent or indicate material change to ownership stake beyond reported post-sale amounts.

The filing reports two disposals totaling 50,000 shares on the same date with reported post-transaction beneficial ownership of 160,000 and 150,000 shares on the two lines, respectively. The report does not provide context such as percentage ownership post-sale relative to outstanding shares, so market impact cannot be assessed from this filing alone.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Klein Michael Stuart

(Last) (First) (Middle)

640 FIFTH AVENUE, 14TH FLOOR

(Street)

NEW YORK NY 10019

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Oklo Inc. [ OKLO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/22/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.0001 per share	09/22/2025		S		40,000	D	$133.3978(1)	160,000	I	See Footnote(1)
Common Stock, par value $0.0001 per share	09/22/2025		S		10,000	D	$135.2	150,000	I	See Footnote(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The shares are held of record by M. Klein Associates, Inc. Michael Klein is the controlling stockholder of M. Klein Associates, Inc. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $133.255 to $133.57, inclusive. The reporting person undertakes to provide to the registrant, any security holder of the registrant, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.

2. The shares are held of record by M. Klein Associates, Inc. Michael Klein is the controlling stockholder of M. Klein Associates, Inc.

	M. Klein Associates, Inc. /s/ Jay Taragin Name: Jay Taragin Title: Authorized Person	09/24/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transactions were reported for Oklo Inc. (OKLO)?

Michael Stuart Klein reported sales of 40,000 shares at a weighted-average price of $133.3978 and 10,000 shares at $135.20 on 09/22/2025.

Who holds the shares sold according to the Form 4?

The shares are held of record by M. Klein Associates, Inc., for which Michael Klein is the controlling stockholder.

How many shares does Michael Klein beneficially own after the reported transactions?

The Form 4 reports post-transaction beneficial ownership of 160,000 shares on one line and 150,000 shares on the other line.

Does the filing provide the exact per-trade prices for the sales?

The filing reports a weighted-average price and a price range ($133.255 to $133.57) and states the reporting person will provide per-trade prices upon request.

When was the Form 4 signed or authorized?

The Form 4 includes an authorization from M. Klein Associates, Inc. signed by Jay Taragin, dated 09/24/2025.