PROTHENA CORP PUBLIC LTD CO — Director's Dealing 2021

Oct 22, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: PROTHENA CORP PUBLIC LTD CO (PRTA)
CIK: 0001559053
Period of Report: 2021-10-20

Reporting Person: Walker Karin L (Chief Accounting Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-10-20	Ordinary Shares, par value $0.01 per share	M	20000	$15.04	Acquired	20000	Direct
2021-10-20	Ordinary Shares, par value $0.01 per share	M	3000	$29.81	Acquired	23000	Direct
2021-10-20	Ordinary Shares, par value $0.01 per share	S	19115	$60.002	Disposed	3885	Direct
2021-10-20	Ordinary Shares, par value $0.01 per share	S	1700	$60.9082	Disposed	2185	Direct
2021-10-20	Ordinary Shares, par value $0.01 per share	S	2185	$61.9407	Disposed	0	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-10-20	Stock Option (right to buy)	$15.04	M	20000	Disposed	2028-06-21	Ordinary Shares (20000)	Direct
2021-10-20	Stock Option (right to buy)	$29.81	M	3000	Disposed	2024-02-04	Ordinary Shares (3000)	Direct

Footnotes

F1: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

F2: The transaction was executed in multiple trades in prices ranging from $59.71 to $60.43, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F3: The transaction was executed in multiple trades in prices ranging from $60.75 to $61.71, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F4: The transaction was executed in multiple trades in prices ranging from $61.84 to $62.22, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The reporting person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares sold at each respective price within the range set forth in this footnote.

F5: The shares subject to the option vested and became exercisable as to 25% of the total number of shares subject to the option on June 21, 2019, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment with the Issuer on each such vesting date.

F6: The shares subject to the option vested and became exercisable as to 25% of the total number of shares subject to the option on February 4, 2015, and with respect to 1/48th of the total number of shares subject to the option in successive, equal monthly installments on each monthly anniversary thereafter, subject to the Reporting Person's continued employment or service relationship with the Issuer on each such vesting date.