Westfield Capital Management’s Alnylam Pharmaceuticals ALNY Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$81.2M	Buy	245,539 +152,095	+163%	+$51.8M	0.34%	95
2025 Q4	$37.2M	Buy	93,444 +5,536	+6%	+$2.45M	0.15%	165
2025 Q3	$40.1M	Sell	87,908 -98,997	-53%	-$40.3M	0.17%	165
2025 Q2	$60.9M	Sell	186,905 -5,267	-3%	-$1.46M	0.26%	120
2025 Q1	$51.9M	Sell	192,172 -23,954	-11%	-$6.16M	0.25%	124
2024 Q4	$50.9M	Buy	+216,126	New	+$56.8M	0.22%	136
2020 Q2	–	Sell	-138,664	Closed	-$15.1M	–	231
2020 Q1	$15.1M	Sell	138,664 -110,345	-44%	-$12.7M	0.13%	160
2019 Q4	$28.7M	Sell	249,009 -31,288	-11%	-$3.12M	0.2%	137
2019 Q3	$22.5M	Sell	280,297 -155,736	-36%	-$12.3M	0.18%	147
2019 Q2	$31.6M	Buy	436,033 +116,110	+36%	+$8.91M	0.24%	136
2019 Q1	$29.9M	Buy	319,923 +49,480	+18%	+$4.14M	0.23%	140
2018 Q4	$19.7M	Buy	270,443 +99,588	+58%	+$7.66M	0.17%	162
2018 Q3	$15M	Sell	170,855 -57,285	-25%	-$5.76M	0.11%	189
2018 Q2	$22.5M	Buy	+228,140	New	+$22.6M	0.17%	177
2016 Q4	–	Sell	-271,302	Closed	-$18.4M	–	259
2016 Q3	$18.4M	Sell	271,302 -5,465	-2%	-$386K	0.15%	176
2016 Q2	$15.4M	Buy	+276,767	New	+$17.4M	0.13%	185