SEC Form 4 · accession 0001209191-15-055897

ALPINE IMMUNE SCIENCES, INC. · ALPN

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

Reporting owner

10% Owner

Period of report

Jun 22, 2015

Accepted (ET)

Jun 24, 2015 · 4:09 pm EDT

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001626199

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^F1,F2	Jun 22, 2015	C	364,358	—	A	364,358	I	By Rock Springs Capital Master Fund LP
Common Stock^F2	Jun 22, 2015	P	200,000	$14.00	A	564,358	I	By Rock Springs Capital Master Fund LP

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Series 2 Convertible Preferred Stock^F2,F1	$2.85	Jun 22, 2015	C	364,358	D	—	—	Common Stock	364,358	0	I

F1The Series 2 Preferred Stock automatically converted into shares of common stock upon the closing of the initial public offering.
F2This report is filed jointly by Rock Springs Capital Master Fund LP (the "Master Fund") and Rock Springs Capital Management LP (the "Management Fund"), both of which share beneficial ownership of more than 10% of the capital stock of the issuer. The Management Fund, as investment adviser to the Master Fund, has the power to vote and dispose of securities held by each of them and may be deemed to have beneficial ownership of the shares owned by the Master Fund. Kris Jenner, Mark Bussard and Graham McPhail are each managing directors of the Management Fund and in their capacity as such, may be deemed to exercise shared voting and investment power over the shares held by the reporting persons. Each of Kris Jenner, Mark Bussard and Graham McPhail disclaims beneficial ownership of the securities of the issuer held by the Master Fund except to the extent of their pecuniary interest therein.