[Form 4] Prothena Corporation plc Insider Trading Activity

Rhea-AI Filing Summary

Plumas Bancorp (PLBC) – SEC Form 3 discloses the initial beneficial ownership of insider Jack William Prescott, newly listed as Executive Vice President & Chief Banking Officer.

Prescott reports no direct common-share holdings but holds a stock option covering 2,600 shares at an exercise price of $34.07. The option vests in five equal annual installments beginning 21-Feb-2025 and expires 21-Feb-2034, providing long-term equity incentive alignment.

The event date is 21-Jul-2025, and the filing was submitted on 30-Jul-2025. No additional derivative or non-derivative securities are listed.

Insights

Financial Analyst

TL;DR: Routine Form 3; 2,600-share option to new EVP, negligible valuation impact.

The filing simply records Prescott’s initial insider status and a modest option grant worth roughly $89k intrinsic value (2,600 × $34.07). The vesting schedule encourages a five-year retention horizon, but the size is immaterial relative to PLBC’s 5.9 m share float. No direct share ownership or unusual terms appear, so the disclosure is standard and should not influence valuation or governance risk assessments.

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^*

Smith Brandon S.

(Last) (First) (Middle)

C/O PROTHENA BIOSCIENCES INC

1800 SIERRA POINT PARKWAY

(Street)

BRISBANE CA 94005

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
PROTHENA CORP PUBLIC LTD CO [ PRTA ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
07/28/2025

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
Ordinary Shares, par value $0.01 per share	07/28/2025		A		130,000	A	$0	130,000	D

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:

	/s/ Michael Malecek, as Attorney in Fact for Brandon S. Smith	07/30/2025
	** 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

Who is the insider named in Plumas Bancorp's (PLBC) Form 3 filing?

The filing lists Jack William Prescott, EVP & Chief Banking Officer, as the reporting person.

How many PLBC shares are covered by Prescott's stock option?

The option covers 2,600 common shares of Plumas Bancorp.

What is the exercise price and term of the option reported?

The exercise price is $34.07; the option expires on 21-Feb-2034.

When does the option vest?

It vests in five equal annual installments beginning 21-Feb-2025.

Does Prescott currently own PLBC shares directly?

No direct share ownership is disclosed in this Form 3.