LeonaBio (LONA) grants CMO 350,000 options at $9.54

Rhea-AI Filing Summary

LeonaBio, Inc. reported that Chief Medical Officer Javier San Martin received a grant of stock options covering 350,000 shares of common stock. The options have an exercise price of $9.54 per share, expire on April 8, 2036, and were awarded as compensation.

According to the grant terms, the options vest in equal monthly installments over 48 months from the grant date, so long as San Martin continues to serve as a Service Provider under LeonaBio's 2026 Equity Incentive Plan. This is a derivative award, not an open-market purchase or sale.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider San Martin Javier

Role CHIEF MEDICAL OFFICER

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	350,000	$0.00	--

Holdings After Transaction: Stock Option (Right to Buy) — 350,000 shares (Direct)

Footnotes (1)

1. [object Object]

Key Figures

Option grant size: 350,000 options Exercise price: $9.54 per share Underlying shares: 350,000 shares +3 more

6 metrics

Option grant size 350,000 options Stock Option (Right to Buy) granted to CMO

Exercise price $9.54 per share Conversion or exercise price of option grant

Underlying shares 350,000 shares Common stock underlying the options

Post-grant derivative holdings 350,000 options Total derivative securities following transaction

Vesting period 48 months Monthly vesting over 48 months from grant date

Expiration date April 8, 2036 Option expiration for the grant

Key Terms

Stock Option (Right to Buy), 2026 Equity Incentive Plan, Service Provider, vesting, +1 more

5 terms

Stock Option (Right to Buy) financial

"security_title: Stock Option (Right to Buy)"

2026 Equity Incentive Plan financial

"as defined in the Issuer's 2026 Equity Incentive Plan"

Service Provider financial

"subject to the optionee continuing to be a Service Provider"

vesting financial

"scheduled to vest monthly over a term of 48 months"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

exercise price financial

"conversion_or_exercise_price: 9.5400"

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.

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^*

San Martin Javier

(Last) (First) (Middle)

C/O LEONABIO, INC.

18706 NORTH CREEK PARKWAY, SUITE 104

(Street)

BOTHELL WASHINGTON 98011

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
LeonaBio, Inc. [ LONA ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/09/2026

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 (Right to Buy)	$9.54	04/09/2026		A		350,000		(1)	04/08/2036	Common Stock	350,000	$0	350,000	D

Explanation of Responses:

1. The shares subject to the option shall be scheduled to vest monthly over a term of 48 months on the monthly anniversaries of the grant date, subject to the optionee continuing to be a Service Provider (as defined in the Issuer's 2026 Equity Incentive Plan) through the applicable vesting dates.

	/s/ Mark Worthington, Attorney-in-Fact for Javier San Martin	04/13/2026
	** 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 did LeonaBio (LONA) report in Javier San Martin’s latest Form 4?

LeonaBio reported that Chief Medical Officer Javier San Martin received a grant of 350,000 stock options. These options give him the right to buy LeonaBio common shares at a fixed price as part of his equity-based compensation package.

How many LeonaBio options were granted to the CMO and at what exercise price?

Javier San Martin was granted 350,000 stock options for LeonaBio common stock at an exercise price of $9.54 per share. This price is the amount he must pay per share if he chooses to exercise the options.

What are the vesting terms of Javier San Martin’s LeonaBio stock options?

The 350,000 stock options granted to Javier San Martin vest monthly over 48 months. Each month, a portion becomes exercisable, provided he continues as a Service Provider under LeonaBio’s 2026 Equity Incentive Plan through the relevant vesting dates.

When do Javier San Martin’s newly granted LeonaBio stock options expire?

Javier San Martin’s stock options expire on April 8, 2036. After that expiration date, any unexercised options will lapse and can no longer be used to purchase LeonaBio common shares under this grant.