Primecap Management’s Magnite MGNI Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Shares Change %	Capital Flow	Portfolio Weight	Portfolio Position
2021 Q4	–	Sell	-266,500	Closed	-$7.46M	–	344
2021 Q3	$7.46M	Hold	266,500	–	–	0.01%	275
2021 Q2	$9.02M	Sell	266,500 -33,500	-11%	-$1.13M	0.01%	264
2021 Q1	$12.5M	Hold	300,000	–	–	0.01%	255
2020 Q4	$9.21M	Hold	300,000	–	–	0.01%	258
2020 Q3	$2.08M	Hold	300,000	–	–	﹤0.01%	285
2020 Q2	$2M	Hold	300,000	–	–	﹤0.01%	274
2020 Q1	$1.67M	Sell	300,000 -33,600	-10%	-$186K	﹤0.01%	265
2019 Q4	$2.72M	Sell	333,600 -291,208	-47%	-$2.38M	﹤0.01%	270
2019 Q3	$5.44M	Sell	624,808 -670,992	-52%	-$5.84M	﹤0.01%	246
2019 Q2	$8.24M	Hold	1,295,800	–	–	0.01%	247
2019 Q1	$7.88M	Sell	1,295,800 -37,000	-3%	-$225K	0.01%	246
2018 Q4	$4.97M	Hold	1,332,800	–	–	﹤0.01%	251
2018 Q3	$4.8M	Hold	1,332,800	–	–	﹤0.01%	265
2018 Q2	$3.8M	Hold	1,332,800	–	–	﹤0.01%	258
2018 Q1	$2.4M	Hold	1,332,800	–	–	﹤0.01%	266
2017 Q4	$2.49M	Sell	1,332,800 -375,000	-22%	-$701K	﹤0.01%	265
2017 Q3	$6.64M	Sell	1,707,800 -260,000	-13%	-$1.01M	0.01%	240
2017 Q2	$10.1M	Sell	1,967,800 -315,000	-14%	-$1.62M	0.01%	231
2017 Q1	$13.4M	Sell	2,282,800 -632,528	-22%	-$3.73M	0.01%	215
2016 Q4	$21.6M	Sell	2,915,328 -501,598	-15%	-$3.72M	0.02%	196
2016 Q3	$28.3M	Sell	3,416,926 -940,874	-22%	-$7.79M	0.03%	188
2016 Q2	$59.5M	Buy	4,357,800 +36,500	+0.8%	+$498K	0.06%	153
2016 Q1	$79M	Buy	4,321,300 +1,924,400	+80%	+$35.2M	0.08%	144
2015 Q4	$39.4M	Buy	2,396,900 +860,600	+56%	+$14.2M	0.04%	179
2015 Q3	$22.3M	Buy	1,536,300 +1,420,300	+1,224%	+$20.6M	0.02%	195
2015 Q2	$1.74M	Buy	+116,000	New	+$1.74M	﹤0.01%	250