Exhibit A

Transactions in the shares of the Issuer During the Past 60 Days

For account of Crown Managed Accounts SPC

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	1,160	88.4579
2/17/21	Buy	1,450	87.6762
2/17/21	Buy	290	87.441304
2/16/21	Sell	1,155	87.6869
2/16/21	Buy	1,247	86.9671
2/16/21	Buy	1,160	86.534319
2/16/21	Buy	2,900	86.9684
2/16/21	Buy	4,553	87.0035
2/12/21	Buy	5,662	82.01
2/12/21	Buy	298	81.8555
2/12/21	Buy	130	81.7822
2/12/21	Buy	1,160	82.0682
2/11/21	Buy	1,798	81.7036
2/10/21	Buy	1,366	81.7369
2/9/21	Buy	2,665	81.8961
2/9/21	Buy	1,450	81.9985
2/8/21	Buy	3,886	81.9516
2/8/21	Buy	2,175	81.8333
2/5/21	Buy	580	81.5612
2/5/21	Buy	1,160	81.5829
2/4/21	Buy	145	80.982426
2/4/21	Buy	6,960	80.7903
2/4/21	Buy	725	81.055
2/4/21	Buy	7,250	79.875
2/4/21	Buy	1,450	81.062
2/4/21	Sell	3,171	80.3289
2/2/21	Buy	4,060	79.7
1/21/21	Buy	288	76.8978
1/21/21	Sell	975	76.9225
1/20/21	Sell	3	76.25
1/5/21	Buy	13,050	75.05
1/5/21	Buy	7	75.96
1/5/21	Sell	6	75.96
1/5/21	Sell	1,451	75.74002
12/18/20	Buy	435	78.071
12/18/20	Buy	2,900	77.65
12/18/20	Sell	431	78.5078
12/17/20	Sell	861	78.9206

For account of Pentwater Merger Arbitrage Master Fund Ltd.

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	12,600	88.4579
2/17/21	Buy	15,750	87.6762
2/17/21	Buy	3,150	87.441304
2/16/21	Sell	12,564	87.6869
2/16/21	Buy	13,545	86.9671
2/16/21	Buy	12,600	86.534319
2/16/21	Buy	31,500	86.9684
2/16/21	Buy	49,455	87.0035
2/12/21	Buy	61,499	82.01
2/12/21	Buy	3,234	81.8555
2/12/21	Buy	1,418	81.7822
2/12/21	Buy	12,600	82.0682
2/11/21	Buy	19,530	81.7036
2/10/21	Buy	14,837	81.7369
2/9/21	Buy	28,949	81.8961
2/9/21	Buy	15,750	81.9985
2/8/21	Buy	42,210	81.9516
2/8/21	Buy	23,625	81.8333
2/5/21	Buy	6,300	81.5612
2/5/21	Buy	12,600	81.5829
2/4/21	Buy	1,575	80.982426
2/4/21	Buy	75,600	80.7903
2/4/21	Buy	7,875	81.055
2/4/21	Buy	78,750	79.875
2/4/21	Buy	15,750	81.062
2/4/21	Sell	34,508	80.3289
2/2/21	Buy	44,100	79.7
1/21/21	Buy	3,133	76.8978
1/21/21	Sell	10,620	76.9225
1/20/21	Sell	31	76.25
1/5/21	Buy	141,750	75.05
1/5/21	Buy	79	75.96
1/5/21	Sell	63	75.96
1/5/21	Sell	15,766	75.74002
12/18/20	Buy	4,725	78.071
12/18/20	Buy	31,500	77.65
12/18/20	Sell	4,691	78.5078
12/17/20	Sell	9,381	78.9206

For account of Pentwater Metric Merger Arbitrage Fund LP

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	1,320	88.4579
2/17/21	Buy	1,650	87.6762
2/17/21	Buy	330	87.441304
2/16/21	Sell	1,390	87.6869
2/16/21	Buy	1,419	86.9671
2/16/21	Buy	1,320	86.534319
2/16/21	Buy	3,300	86.9684
2/16/21	Buy	5,181	87.0035
2/12/21	Buy	6,442	82.0106
2/12/21	Buy	339	81.8555
2/12/21	Buy	148	81.7822
2/12/21	Buy	1,320	82.0682
2/11/21	Buy	2,046	81.7036
2/10/21	Buy	1,554	81.7369
2/9/21	Buy	3,033	81.8961
2/9/21	Buy	1,650	81.9985
2/8/21	Buy	4,422	81.9516
2/8/21	Buy	2,475	81.8333
2/5/21	Buy	660	81.5612
2/5/21	Buy	1,320	81.5829
2/4/21	Buy	165	80.982426
2/4/21	Buy	7,920	80.7903
2/4/21	Buy	825	81.055
2/4/21	Buy	8,250	79.875
2/4/21	Buy	1,650	81.062
2/4/21	Sell	3,903	80.3289
2/2/21	Buy	4,620	79.7
1/21/21	Buy	363	76.8978
1/21/21	Sell	1,232	76.9225
1/20/21	Sell	3	76.25
1/5/21	Buy	14,850	75.05
1/5/21	Buy	8	75.96
1/5/21	Sell	6	75.96
1/5/21	Sell	1,652	75.74002
12/18/20	Buy	495	78.071
12/18/20	Buy	3,300	77.65
12/18/20	Sell	560	78.5078
12/17/20	Sell	1,122	78.9206

For account of

LMA SPC for and on behalf of

MAP 98 Segregated Portfolio

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	1,520	88.4579
2/17/21	Buy	1,900	87.6762
2/17/21	Buy	380	87.441304
2/16/21	Sell	1,514	87.6869
2/16/21	Buy	1,634	86.9671
2/16/21	Buy	1,520	86.534319
2/16/21	Buy	3,800	86.9684
2/16/21	Buy	5,966	87.0035
2/12/21	Buy	7,419	82.01
2/12/21	Buy	390	81.8555
2/12/21	Buy	171	81.7822
2/12/21	Buy	1,520	82.0682
2/11/21	Buy	2,356	81.7036
2/10/21	Buy	1,790	81.7369
2/9/21	Buy	3,492	81.8961
2/9/21	Buy	1,900	81.9985
2/8/21	Buy	5,092	81.9516
2/8/21	Buy	2,850	81.8333
2/5/21	Buy	760	81.5612
2/5/21	Buy	1,520	81.5829
2/4/21	Buy	190	80.982426
2/4/21	Buy	9,120	80.7903
2/4/21	Buy	950	81.055
2/4/21	Buy	9,500	79.875
2/4/21	Buy	1,900	81.062
2/4/21	Sell	4,156	80.3289
2/2/21	Buy	5,320	79.7
1/21/21	Buy	377	76.8978
1/21/21	Sell	1,278	76.9225
1/20/21	Sell	4	76.25
1/5/21	Buy	17,100	75.05
1/5/21	Buy	9	75.96
1/5/21	Sell	8	75.96
1/5/21	Sell	1,902	75.74002
12/18/20	Buy	570	78.071
12/18/20	Buy	3,800	77.65
12/18/20	Sell	564	78.5078
12/17/20	Sell	1,128	78.9206

For account of Oceana Master Fund Ltd.

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	6,320	88.4579
2/17/21	Buy	7,900	87.6762
2/17/21	Buy	1,580	87.441304
2/16/21	Sell	6,294	87.6869
2/16/21	Buy	6,794	86.9671
2/16/21	Buy	6,320	86.534319
2/16/21	Buy	15,800	86.9684
2/16/21	Buy	24,806	87.0035
2/12/21	Buy	30,847	82.01
2/12/21	Buy	1,622	81.8555
2/12/21	Buy	711	81.7822
2/12/21	Buy	6,320	82.0682
2/11/21	Buy	9,796	81.7036
2/10/21	Buy	7,442	81.7369
2/9/21	Buy	14,520	81.8961
2/9/21	Buy	7,900	81.9985
2/8/21	Buy	21,172	81.9516
2/8/21	Buy	11,850	81.8333
2/5/21	Buy	3,160	81.5612
2/5/21	Buy	6,320	81.5829
2/4/21	Buy	790	80.982426
2/4/21	Buy	37,920	80.7903
2/4/21	Buy	3,950	81.055
2/4/21	Buy	39,500	79.875
2/4/21	Buy	7,900	81.062
2/4/21	Sell	17,279	80.3289
2/2/21	Buy	22,120	79.7
1/21/21	Buy	1,568	76.8978
1/21/21	Sell	5,315	76.9225
1/20/21	Sell	16	76.25
1/5/21	Buy	71,100	75.05
1/5/21	Buy	40	75.96
1/5/21	Sell	32	75.96
1/5/21	Sell	7,908	75.74002
12/18/20	Buy	2,370	78.071
12/18/20	Buy	15,800	77.65
12/18/20	Sell	2,346	78.5078
12/17/20	Sell	4,691	78.9206

For account of Pentwater Equity Opportunity Master Fund Ltd

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	4,600	88.4579
2/17/21	Buy	5,750	87.6762
2/17/21	Buy	1,150	87.441304
2/16/21	Sell	4,505	87.6869
2/16/21	Buy	4,945	86.9671
2/16/21	Buy	4,600	86.534319
2/16/21	Buy	11,500	86.9684
2/16/21	Buy	18,055	87.0035
2/12/21	Buy	22,452	82.01
2/12/21	Buy	1,179	81.8555
2/12/21	Buy	518	81.7822
2/12/21	Buy	4,600	82.0682
2/11/21	Buy	7,130	81.7036
2/10/21	Buy	5,416	81.7369
2/9/21	Buy	10,569	81.8961
2/9/21	Buy	5,750	81.9985
2/8/21	Buy	15,410	81.9516
2/8/21	Buy	8,625	81.8333
2/5/21	Buy	2,300	81.5612
2/5/21	Buy	4,600	81.5829
2/4/21	Buy	575	80.982426
2/4/21	Buy	27,600	80.7903
2/4/21	Buy	2,875	81.055
2/4/21	Buy	28,750	79.875
2/4/21	Buy	5,750	81.062
2/4/21	Sell	12,282	80.3289
2/2/21	Buy	16,100	79.7
1/21/21	Buy	1,105	76.8978
1/21/21	Sell	3,746	76.9225
1/20/21	Sell	11	76.25
1/5/21	Buy	51,750	75.05
1/5/21	Buy	29	75.96
1/5/21	Sell	23	75.96
1/5/21	Sell	5,756	75.74002
12/18/20	Buy	1,725	78.071
12/18/20	Buy	11,500	77.65
12/18/20	Sell	1,637	78.5078
12/17/20	Sell	3,272	78.9206

For account of PWCM Master Fund Ltd

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	10,720	88.4579
2/17/21	Buy	13,400	87.6762
2/17/21	Buy	2,680	87.441304
2/16/21	Sell	10,691	87.6869
2/16/21	Buy	11,524	86.9671
2/16/21	Buy	10,720	86.534319
2/16/21	Buy	26,800	86.9684
2/16/21	Buy	42,076	87.0035
2/12/21	Buy	52,323	82.01
2/12/21	Buy	2,751	81.8555
2/12/21	Buy	1,206	81.7822
2/12/21	Buy	10,720	82.0682
2/11/21	Buy	16,616	81.7036
2/10/21	Buy	12,623	81.7369
2/9/21	Buy	24,629	81.8961
2/9/21	Buy	13,400	81.9985
2/8/21	Buy	35,912	81.9516
2/8/21	Buy	20,100	81.8333
2/5/21	Buy	5,360	81.5612
2/5/21	Buy	10,720	81.5829
2/4/21	Buy	1,340	80.982426
2/4/21	Buy	64,320	80.7903
2/4/21	Buy	6,700	81.055
2/4/21	Buy	67,000	79.875
2/4/21	Buy	13,400	81.062
2/4/21	Sell	29,368	80.3289
2/2/21	Buy	37,520	79.7
1/21/21	Buy	2,666	76.8978
1/21/21	Sell	9,039	76.9225
1/20/21	Sell	27	76.25
1/5/21	Buy	120,600	75.05
1/5/21	Buy	67	75.96
1/5/21	Sell	53	75.96
1/5/21	Sell	13,413	75.74002
12/18/20	Buy	4,020	78.071
12/18/20	Buy	26,800	77.65
12/18/20	Sell	3,993	78.5078
12/17/20	Sell	7,986	78.9206

For account of Investment Opportunities 3 SPC

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	1,600	88.4579
2/17/21	Buy	2,000	87.6762
2/17/21	Buy	400	87.441304
2/16/21	Sell	1,712	87.6869
2/16/21	Buy	1,720	86.9671
2/16/21	Buy	1,600	86.534319
2/16/21	Buy	4,000	86.9684
2/16/21	Buy	6,280	87.0035
2/12/21	Buy	7,810	82.01
2/12/21	Buy	411	81.8555
2/12/21	Buy	180	81.7822
2/12/21	Buy	1,600	82.0682
2/11/21	Buy	2,480	81.7036
2/10/21	Buy	1,884	81.7369
2/9/21	Buy	3,676	81.8961
2/9/21	Buy	2,000	81.9985
2/8/21	Buy	5,360	81.9516
2/8/21	Buy	3,000	81.8333
2/5/21	Buy	800	81.5612
2/5/21	Buy	1,600	81.5829
2/4/21	Buy	200	80.982426
2/4/21	Buy	9,600	80.7903
2/4/21	Buy	1,000	81.055
2/4/21	Buy	10,000	79.875
2/4/21	Buy	2,000	81.062
2/4/21	Sell	4,835	80.3289
2/2/21	Buy	5,600	79.7
1/21/21	Buy	453	76.8978
1/21/21	Sell	1,536	76.9225
1/20/21	Sell	4	76.25
1/5/21	Buy	18,000	75.05
1/5/21	Buy	10	75.96
1/5/21	Sell	8	75.96
1/5/21	Sell	2,002	75.74002
12/18/20	Buy	600	78.071
12/18/20	Buy	4,000	77.65
12/18/20	Sell	704	78.5078
12/17/20	Sell	1,411	78.9206

For account of Pentwater Unconstrained Master Fund Ltd.

Date	Buy/Sell	Number of shares of Common Stock	Price ($)
2/17/21	Buy	160	88.4579
2/17/21	Buy	200	87.6762
2/17/21	Buy	40	87.441304
2/16/21	Sell	175	87.6869
2/16/21	Buy	172	86.9671
2/16/21	Buy	160	86.534319
2/16/21	Buy	400	86.9684
2/16/21	Buy	628	87.0035
2/12/21	Buy	41	81.8555
2/12/21	Buy	18	81.7822
2/12/21	Buy	160	82.0682
2/12/21	Buy	781	82.01
2/11/21	Buy	248	81.7036
2/10/21	Buy	188	81.7369
2/9/21	Buy	367	81.8961
2/9/21	Buy	200	81.9985
2/8/21	Buy	536	81.9516
2/8/21	Buy	300	81.8333
2/5/21	Buy	80	81.5612
2/5/21	Buy	160	81.5829
2/4/21	Buy	20	80.982426
2/4/21	Buy	960	80.7903
2/4/21	Buy	100	81.055
2/4/21	Buy	1,000	79.875
2/4/21	Buy	200	81.062
2/4/21	Sell	498	80.3289
2/2/21	Buy	560	79.7
1/21/21	Buy	47	76.8978
1/21/21	Sell	159	76.9225
1/20/21	Sell	1	76.25
1/5/21	Buy	1,800	75.05
1/5/21	Buy	1	75.96
1/5/21	Sell	1	75.96
1/5/21	Sell	200	75.74002
12/18/20	Buy	60	78.071
12/18/20	Buy	400	77.65
12/18/20	Sell	74	78.5078
12/17/20	Sell	148	78.9206