13G Filing: James E. Flynn and Neos Therapeutics Inc (NEOS)

Neos Therapeutics, Inc.

2940
N. Highway 360

Grand Prairie, TX 75050

Deerfield Mgmt, L.P., Deerfield Mgmt III, L.P., Deerfield
Management Company, L.P., Deerfield Private Design Fund III, L.P., Deerfield Special Situations Fund, L.P. and Deerfield Partners,
L.P. – Delaware limited partnerships;

Deerfield International Master Fund, L.P. –
British Virgin Islands limited partnership;

James E. Flynn – United States citizen

Common Stock

If This Statement is Filed Pursuant to
Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:

Broker or dealer registered under Section 15 of the
Exchange Act.

Insurance company as defined in Section 3(a)(19) of
the Exchange Act.

Investment company registered under Section 8 of the
Investment Company Act.

An employee benefit plan or endowment fund in accordance
with Rule 13d-1(b)(1)(ii)(F);