SEC Form 3 · accession 0001209191-18-050884

Principia Biopharma Inc. · PRNB

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Christopher Y Chai

Officer — Chief Financial Officer

Period of report

Sep 13, 2018

Accepted (ET)

Sep 13, 2018 · 5:03 pm EDT

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001510487

Table I — non-derivative securities

Security	Date	Code	Shares	A/D	Owned after	D/I	Nature of ownership
Common Stock	holding	—	—	—	6,825	D
Common Stock^F1	holding	—	—	—	1,651	I	See footnote
Common Stock^F2	holding	—	—	—	1,651	I	See footnote

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Employee Stock Option (right to buy)^F3	$2.9977	holding	—	—	—	—	Dec 11, 2023	Common Stock	72,656	—	D
Employee Stock Option (right to buy)^F3	$3.1794	holding	—	—	—	—	Jun 26, 2024	Common Stock	24,769	—	D
Employee Stock Option (right to buy)^F4	$4.7236	holding	—	—	—	—	Dec 25, 2024	Common Stock	29,723	—	D
Employee Stock Option (right to buy)^F5	$4.9961	holding	—	—	—	—	Jul 20, 2025	Common Stock	13,210	—	D
Employee Stock Option (right to buy)^F6	$7.2671	holding	—	—	—	—	Dec 13, 2027	Common Stock	34,677	—	D
Employee Stock Option (right to buy)^F7	$11.3549	holding	—	—	—	—	Aug 23, 2028	Common Stock	44,034	—	D

Explanation of responses

F1Shares indirectly held by Christopher Chai, as Custodian for Andrew D. Chai, under California Uniform Transfers to Minors Act, of which the Reporting Person is a custodian and may be deemed to share voting and dispositive power over these shares.
F2Shares indirectly held by Christopher Chai, as Custodian for Kristin M. Chai, under California Uniform Transfers to Minors Act, of which the Reporting Person is a custodian and may be deemed to share voting and dispositive power over these shares.
F3The stock option is fully vested and immediately exercisable.
F4The stock option vested and became exercisable as to 25% of the shares subject to the option on November 11, 2015, and thereafter vests as to 1/48th of the shares in equal monthly installments, until such time as the option is 100% vested, subject to the continuing employment of the Reporting Person on each vesting date.
F5The stock option vested and became exercisable as to 25% of the shares subject to the option on July 21, 2016, and thereafter vests as to 1/48th of the shares in equal monthly installments, until such time as the option is 100% vested, subject to the continuing employment of the Reporting Person on each vesting date.
F6The stock option will vest and become exercisable as to 25% of the shares subject to the option on December 14, 2018, and thereafter vests as to 1/48th of the shares in equal monthly installments, until such time as the option is 100% vested, subject to the continuing employment of the Reporting Person on each vesting date.
F7The stock option will vest and become exercisable as to 25% of the shares subject to the option on August 23, 2019, and thereafter vests as to 1/48th of the shares in equal monthly installments, until such time as the option is 100% vested, subject to the continuing employment of the Reporting Person on each vesting date.