Security	Date	Code	Shares	Price	A/D	Owned after	D/I	Nature of ownership
Common Stock^{F1,F2,F3,F4,F5,F6,F7}	Jun 14, 2018	S	4,326,541	$37.81	D	16,188,048	I	See footnotes
Common Stock^{F8,F3,F4,F5,F6,F7,F9}	Jun 15, 2018	S	243,368	$37.81	D	15,944,680	I	See footnotes

Table II — derivative securities

No Table II lines on this filing.

Explanation of responses

F1Includes 3,303,943, 317,588 and 705,010 shares of common stock of the issuer sold by GRD Holding LP, GRD Holding-A LP and GRD Holding AEA LLC, respectively, pursuant to the Underwriting Agreement dated June 11, 2018.
F2These shares of common stock of the issuer consist of (i) 12,361,930 shares directly held by GRD Holding LP, whose general partner is GRD Holding GP LLC, whose sole member is AEA Investors LP, (ii) 1,188,275 shares directly held by GRD Holding-A LP, whose general partner is GRD Holding-A LLC, whose sole member is AEA Investors LP, and (iii) 2,637,843 shares directly held by GRD Holding AEA LLC, whose members are AEA Investors 2006 Participant Fund LP, AEA Investors 2006 QP Participant Fund LP, AEA Investors 2006 Fund L.P., and AEA Investors 2006 Fund II L.P.
F3The general partner of each of AEA Investors 2006 Participant Fund LP and AEA Investors 2006 QP Participant Fund LP is AEA Investors 2006 PF LLC, whose sole member is AEA Management LLC. The general partner of each of AEA Investors 2006 Fund L.P. and AEA Investors 2006 Fund II L.P. is AEA Investors Partners 2006 L.P., whose general partner is AEA Management (Cayman) Ltd.
F4Each of GRD Holding GP LLC and AEA Investors LP may be deemed to share beneficial ownership of the shares of common stock of the issuer held of record by GRD Holding LP, but each disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein, as well as of the shares of common stock of the issuer held of record by each of GRD Holding-A LP and GRD Holding AEA LLC. Each of GRD Holding-A LLC and AEA Investors LP may be deemed to share beneficial ownership of the shares of common stock of the issuer held of record by GRD Holding-A LP, but each disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein, as well as of the shares of common stock of the issuer held of record by each of GRD Holding LP and GRD Holding AEA LLC.
F5Each of AEA Investors 2006 Participant Fund LP, AEA Investors 2006 QP Participant Fund LP, AEA Investors 2006 PF LLC, AEA Management LLC, AEA Investors 2006 Fund L.P., AEA Investors 2006 Fund II L.P., AEA Investors Partners 2006 L.P. and AEA Management (Cayman) Ltd. may be deemed to share beneficial ownership of the shares of common stock of the issuer held of record by GRD Holding AEA LLC, but each disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein, as well as of the shares of common stock of the issuer held of record by each of GRD Holding LP and GRD Holding-A LP.
F6John L. Garcia, the Chairman and Chief Executive Officer of AEA Investors LP, the sole member of AEA Management LLC and the sole stockholder and director of AEA Management (Cayman) Ltd., may also be deemed to share beneficial ownership of the shares of common stock of the issuer held of record by GRD Holding LP, GRD Holding-A LP and GRD Holding AEA LLC, but Dr. Garcia disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.
F7Due to the limitations of the Securities and Exchange Commission's EDGAR system, AEA Investors LP, GRD Holding GP LLC, GRD Holding-A LLC, GRD Holding-A LP and GRD Holding LP have filed a separate Form 4.
F8Includes 185,847, 17,864 and 39,657 shares of common stock of the issuer sold by GRD Holding LP, GRD Holding-A LP and GRD Holding AEA LLC, respectively, pursuant to the exercise, in part, of the option to purchase additional shares under the Underwriting Agreement dated June 11, 2018.
F9These shares of common stock of the issuer consist of (i) 12,176,083 shares directly held by GRD Holding LP, whose general partner is GRD Holding GP LLC, whose sole member is AEA Investors LP, (ii) 1,170,411 shares directly held by GRD Holding-A LP, whose general partner is GRD Holding-A LLC, whose sole member is AEA Investors LP, and (iii) 2,598,186 shares directly held by GRD Holding AEA LLC, whose members are AEA Investors 2006 Participant Fund LP, AEA Investors 2006 QP Participant Fund LP, AEA Investors 2006 Fund L.P., and AEA Investors 2006 Fund II L.P.