As of the date hereof, the Reporting Persons
may be deemed to be the beneficial owners of 3,850,000 Shares, constituting 7.0% of the Shares, based upon 55,166,687* Shares outstanding.
Casdin has the sole power to vote or direct
the vote of 0 Shares; has the shared power to vote or direct the vote of 3,850,000 Shares; has the sole power to dispose or direct
the disposition of 0 Shares; and has the shared power to dispose or direct the disposition of 3,850,000 Shares.
The Fund has the sole power to vote or direct
the vote of 0 Shares; has the shared power to vote or direct the vote of 3,850,000 Shares; has the sole power to dispose or direct
the disposition of 0 Shares; and has the shared power to dispose or direct the disposition of 3,850,000 Shares.
The GP has the sole power to vote or direct
the vote of 0 Shares; has the shared power to vote or direct the vote of 3,850,000 Shares; has the sole power to dispose or direct
the disposition of 0 Shares; and has the shared power to dispose or direct the disposition of 3,850,000 Shares.
Eli Casdin has the sole power to vote or direct
the vote of 0 Shares; has the shared power to vote or direct the vote of 3,850,000 Shares; has the sole power to dispose or direct
the disposition of 0 Shares; and has the shared power to dispose or direct the disposition of 3,850,000 Shares.
The transactions by the Reporting Persons in
the Shares during the past sixty days are set forth in Exhibit B. All such transactions were carried out in open market transactions.
*This outstanding Shares figure reflects the
number of outstanding Shares at February 23, 2018, as reported in the Form 10-K filed by the Issuer on February 27, 2018.
|