Ralph James Scapa

Insider Trading: Sales

Symbol	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
ALTR	$60.54	2,583	$156,369.65	0	2021-03-17	Filing
ALTR	$60.08	4,415	$265,262.03	2,583	2021-03-17	Filing
ALTR	$61.59	6,641	$408,999.27	0	2021-03-16	Filing
ALTR	$60.64	10,027	$608,057.33	6,641	2021-03-16	Filing
ALTR	$61.71	4,955	$305,768.10	0	2021-03-16	Filing
ALTR	$60.90	10,806	$658,074.59	4,955	2021-03-16	Filing
ALTR	$60.20	3,325	$200,151.70	15,761	2021-03-16	Filing
ALTR	$61.90	4,320	$267,403.68	0	2021-03-15	Filing
ALTR	$61.13	2,402	$146,831.86	4,320	2021-03-15	Filing
ALTR	$60.42	2,600	$157,092.00	6,722	2021-03-15	Filing
ALTR	$61.85	7,521	$465,151.29	0	2021-03-15	Filing
ALTR	$60.70	5,895	$357,850.08	7,521	2021-03-15	Filing
ALTR	$59.82	500	$29,908.50	13,416	2021-03-15	Filing
ALTR	$59.51	1,845	$109,794.11	101,520	2021-03-12	Filing
ALTR	$59.24	2,186	$129,498.64	103,365	2021-03-05	Filing
ALTR	$61.51	764	$46,996.70	0	2021-02-18	Filing
ALTR	$61.01	2,991	$182,486.89	764	2021-02-18	Filing
ALTR	$64.22	600	$38,531.40	0	2021-02-17	Filing
ALTR	$63.41	2,300	$145,843.00	600	2021-02-17	Filing
ALTR	$62.35	11,159	$695,808.29	2,900	2021-02-17	Filing