13F History

FRONTIER CAPITAL MANAGEMENT CO LLC

Holdings History for ON SEMICONDUCTOR CORP - COM (ON)

Symbol: ON on Nasdaq
Investment type: Equity - Shares of Stock
Class: COM

Shares, Excluding Options vs Price

Value, Excluding Options

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
12/31/2018		-0.05%	$0	0	-400,745	-100%		Q4 2018
9/30/2018	0.05%	-0.04%	$7.39M	401K	-364,102	-47.6%	$18.43	Q3 2018
6/30/2018	0.12%	-0.04%	$17M	765K	-227,009	-22.9%	$22.23	Q2 2018
3/31/2018	0.18%	-0.02%	$24.3M	992K	-132,499	-11.8%	$24.46	Q1 2018
12/31/2017	0.17%	-0.21%	$23.5M	1.12M	-1,370,438	-54.9%	$20.94	Q4 2017
9/30/2017	0.33%	0%	$46.1M	2.49M	-2,020	-0.08%	$18.47	Q3 2017
6/30/2017	0.26%	-0.18%	$35.1M	2.5M	-1,708,727	-40.6%	$14.04	Q2 2017
3/31/2017	0.48%	-0.32%	$65.1M	4.21M	-2,835,151	-40.3%	$15.49	Q1 2017
12/31/2016	0.69%	-0.05%	$89.8M	7.04M	-467,045	-6.22%	$12.76	Q4 2016
9/30/2016	0.74%	-0.01%	$92.5M	7.51M	-98,271	-1.29%	$12.32	Q3 2016
6/30/2016	0.55%	-0.09%	$67.1M	7.61M	-1,179,007	-13.4%	$8.82	Q2 2016
3/31/2016	0.67%	+0.04%	$84.2M	8.79M	+543,851	+6.6%	$9.59	Q1 2016
12/31/2015	0.67%	+0.29%	$80.8M	8.24M	+3,602,424	+77.7%	$9.80	Q4 2015
9/30/2015	0.37%	+0.01%	$43.6M	4.64M	+84,790	+1.86%	$9.40	Q3 2015
6/30/2015	0.38%	+0.02%	$53.2M	4.55M	+202,853	+4.66%	$11.69	Q2 2015
3/31/2015	0.38%	-0.1%	$52.7M	4.35M	-1,094,612	-20.1%	$12.11	Q1 2015
12/31/2014	0.41%	-0.12%	$55.2M	5.45M	-1,649,389	-23.2%	$10.13	Q4 2014
9/30/2014	0.51%	-0.34%	$63.4M	7.1M	-4,689,821	-39.8%	$8.94	Q3 2014
6/30/2014	0.79%	+0.12%	$108M	11.8M	+1,734,265	+17.3%	$9.14	Q2 2014
3/31/2014	0.68%	+0.35%	$94.5M	10.1M	+5,166,581	+106%	$9.40	Q1 2014
12/31/2013	0.3%		$40.2M	4.88M			$8.24	Q4 2013

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.