Clene (CLNN) Chief Science Officer receives 45,000-share stock option grant

Rhea-AI Filing Summary

Clene Inc. reported that Chief Science Officer Mark Mortenson received a grant of stock options covering 45,000 shares of common stock. The options have an exercise price of $5.53 per share and expire on June 10, 2036. According to the grant terms, 25% of the options vest on June 11, 2027, with the remaining shares vesting in 36 equal monthly installments starting July 11, 2027. This is a compensation-related award, not an open-market stock purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Mortenson Mark

Role Chief Science Officer

Type	Security	Shares	Price	Value
Grant/Award	stock option	45,000	$0.00	--

Holdings After Transaction: stock option — 45,000 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Option grant size: 45,000 shares Exercise price: $5.53 per share Total options after grant: 45,000 options +3 more

6 metrics

Option grant size 45,000 shares Stock option award to Chief Science Officer

Exercise price $5.53 per share Stock option exercise price

Total options after grant 45,000 options Total derivative securities following transaction

Initial vesting date June 11, 2027 25% of options vest

Monthly vesting installments 36 installments Remaining options vest monthly beginning July 11, 2027

Option expiration June 10, 2036 Expiration date of stock options

Key Terms

stock option, exercise price, vest, Amended 2020 Stock Plan

4 terms

stock option financial

"This option was granted on June 11, 2026 as an option for 45,000 shares"

A stock option is a contract that gives you the right to buy or sell a company's stock at a specific price within a certain time frame. People use them to potentially make money if the stock's price moves favorably or to protect against losses. It's like holding a coupon that can be used to buy or sell stock at a set price later on.

exercise price financial

"at an exercise price of $5.53 per share"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vest financial

"The options vest with respect to the first 25% of such shares on June 11, 2027"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

Amended 2020 Stock Plan financial

"under the Clene Inc Amended 2020 Stock Plan at an exercise price"

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Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mortenson Mark

(Last) (First) (Middle)

6550 SOUTH MILLROCK DRIVE

SUITE G50

(Street)

SALT LAKE CITY UTAH 84121

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Clene Inc. [ CLNN ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/11/2026

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

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

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

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

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
stock option	$5.53	06/11/2026		A		45,000		(1)	06/10/2036	common stock	45,000	$0	45,000	D

Explanation of Responses:

1. This option was granted on June 11, 2026 as an option for 45,000 shares of Common Stock under the Clene Inc Amended 2020 Stock Plan at an exercise price of $5.53 per share. The options vest with respect to the first 25% of such shares on June 11, 2027 and then in 36 equal installments of the balance of the shares of Common Stock on the 11th day of each month beginning July 11, 2027 until such share are fully vested.

	/s/ Jerome T. Miraglia POA	06/15/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Clene (CLNN) disclose for Mark Mortenson?

Clene disclosed that Chief Science Officer Mark Mortenson received a grant of stock options for 45,000 shares of common stock. These options are a compensation award, not an open-market transaction, and give him the right to buy shares at a fixed exercise price.

How many Clene (CLNN) shares are covered by Mortenson’s new stock options?

The option grant covers 45,000 shares of Clene common stock. This represents the number of shares Mortenson may purchase under the award if the options vest and are exercised according to the plan’s terms and schedule.

What is the exercise price of Mark Mortenson’s Clene (CLNN) stock options?

The options carry an exercise price of $5.53 per share. This means Mortenson can buy Clene common stock at $5.53 per share once the options vest, regardless of the market price at that time, until they expire.

How do Mortenson’s Clene (CLNN) stock options vest over time?

Twenty-five percent of the options vest on June 11, 2027. The remaining 75% vest in 36 equal monthly installments beginning July 11, 2027, creating a four-year vesting structure that encourages longer-term service with the company.

When do Mark Mortenson’s Clene (CLNN) stock options expire?

The stock options expire on June 10, 2036. After that expiration date, any unexercised options will lapse, and Mortenson will no longer have the right to purchase shares under this particular award.

Is Mortenson’s Clene (CLNN) option grant an open-market stock purchase or sale?

No, this transaction is a grant of stock options as compensation, not an open-market purchase or sale. The filing shows an award under the Clene Inc. Amended 2020 Stock Plan with no cash changing hands at grant.