13G Filing: Partner Fund Management and Jounce Therapeutics Inc (JNCE)

Item 4

Ownership

A.

Partner Fund Management, L.P. and Partner Fund Management GP, LLC

(a)

PFM and PFM-GP may be deemed to beneficially own 1,727,943 shares of Common Stock.

(b)

The number of shares PFM and PFM-GP may be deemed to beneficially own constitutes approximately 5.4% of the Common Stock outstanding.

(c)

Number of shares as to which such person has:

(i)

sole power to vote or to direct the vote: 0

(ii)

shared power to vote or to direct the vote: 1,727,943

(iii)

sole power to dispose or to direct the disposition of: 0

(iv)

shared power to dispose or to direct the disposition of: 1,727,943

B.

Partner Investment Management, L.P. and Partner Investment Management GP, LLC

(a)

PIM and PIM-GP may be deemed to beneficially own 14,265 shares of Common Stock.

(b)

The number of shares PIM and PIM-GP may be deemed to beneficially own constitutes less than 0.1% of the Common Stock outstanding.

(c)

Number of shares as to which such person has:

(i)

sole power to vote or to direct the vote: 0

(ii)

shared power to vote or to direct the vote: 14,265

(iii)

sole power to dispose or to direct the disposition of: 0

(iv)

shared power to dispose or to direct the disposition of: 14,265

Page 10 of 13 – SEC Filing