LeonaBio (LONA) director Callori Fred files baseline Form 3 ownership report

Rhea-AI Filing Summary

LeonaBio, Inc. director Callori Fred filed an initial Form 3 to report insider status with the company. The filing lists no stock purchases, sales, option exercises, gifts, or other transactions, indicating this is a baseline ownership disclosure rather than a record of trading activity.

Key Terms

Form 3, reporting person, beneficial ownership

3 terms

Form 3 regulatory

"INSIDER FILING DATA (Form 3):"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

reporting person regulatory

""reportingPersons": [ { "name": "Callori Fred""

beneficial ownership financial

"Form 3 is the initial statement of beneficial ownership filed by company insiders"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Understanding Insider Trading Forms →

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Callori Fred

(Last) (First) (Middle)

C/O LEONABIO, INC.

18706 NORTH CREEK PARKWAY, SUITE 104

(Street)

BOTHELL WASHINGTON 98011

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
05/05/2026

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

3a. Foreign Trading Symbol

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

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

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

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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ Mark Worthington, Attorney-in-Fact for Fred P. Callori	05/07/2026
	** 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 5 (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 3: SEC 1473 (03-26)

FAQ

What does LeonaBio (LONA) disclose in Callori Fred’s Form 3 filing?

The Form 3 shows that Callori Fred is a director of LeonaBio, Inc. It reports no stock purchases, sales, option exercises, gifts, or other insider transactions, serving only as an initial baseline disclosure of insider status.

Does Callori Fred buy or sell LeonaBio (LONA) shares in this Form 3?

No transactions are reported for Callori Fred in this Form 3. The transaction summary shows zero buys, sells, exercises, gifts, tax withholdings, or restructurings, indicating no trading activity is being disclosed in this filing.

What is a Form 3 and why is it filed for LeonaBio (LONA)?

Form 3 is the initial statement of beneficial ownership filed by company insiders such as directors. It establishes a baseline record of their holdings and status before any future trades are reported on subsequent Forms 4 or 5.

Are there any derivative securities reported for Callori Fred at LeonaBio (LONA)?

The derivative section of this Form 3 is empty for Callori Fred. The derivative summary shows zero derivative transactions and no remaining derivative positions, so no options, warrants, or similar instruments are disclosed here.

Does the Form 3 for LeonaBio (LONA) mention any Rule 10b5-1 trading plans?

The Form 3 data provided does not reference any Rule 10b5-1 trading plans. With no transactions and only an initial insider status disclosure, there is no indication of pre-arranged trading activity in this filing.