Teachers Advisors’s Biogen BIIB Stock Holding History

Quarter	Market Value	Status	Shares	Shares Change %	Trade Value	Portfolio Weight	Portfolio Position
2019 Q1	$99.8M	Buy	422,255 +6,852	+2%	+$1.62M	0.12%	165
2018 Q4	$125M	Sell	415,403 -153,835	-27%	-$46.3M	0.18%	115
2018 Q3	$201M	Buy	569,238 +41,637	+8%	+$14.7M	0.24%	71
2018 Q2	$153M	Buy	527,601 +108,512	+26%	+$31.5M	0.19%	103
2018 Q1	$115M	Sell	419,089 -13,483	-3%	-$3.69M	0.15%	140
2017 Q4	$138M	Buy	432,572 +82,966	+24%	+$26.4M	0.18%	112
2017 Q3	$109M	Buy	349,606 +21,037	+6%	+$6.59M	0.15%	153
2017 Q2	$89.2M	Sell	328,569 -100,236	-23%	-$27.2M	0.12%	193
2017 Q1	$117M	Buy	428,805 +101,313	+31%	+$27.7M	0.17%	124
2016 Q4	$92.9M	Sell	327,492 -67,716	-17%	-$19.2M	0.15%	153
2016 Q3	$124M	Buy	395,208 +75,214	+24%	+$23.5M	0.21%	97
2016 Q2	$77.4M	Sell	319,994 -46,614	-13%	-$11.3M	0.14%	177
2016 Q1	$95.4M	Sell	366,608 -32,084	-8%	-$8.35M	0.17%	129
2015 Q4	$122M	Sell	398,692 -112,402	-22%	-$34.4M	0.23%	89
2015 Q3	$149M	Sell	511,094 -45,374	-8%	-$13.2M	0.3%	53
2015 Q2	$225M	Buy	556,468 +243,932	+78%	+$98.5M	0.42%	31
2015 Q1	$132M	Sell	312,536 -140,313	-31%	-$59.2M	0.25%	70
2014 Q4	$154M	Sell	452,849 -78,656	-15%	-$26.7M	0.29%	56
2014 Q3	$176M	Sell	531,505 -11,319	-2%	-$3.74M	0.35%	36
2014 Q2	$171M	Sell	542,824 -106,415	-16%	-$33.6M	0.35%	35
2014 Q1	$199M	Buy	649,239 +889	+0.1%	+$272K	0.43%	25
2013 Q4	$181M	Sell	648,350 -10,312	-2%	-$2.88M	0.41%	27
2013 Q3	$159M	Buy	658,662 +63,469	+11%	+$15.3M	0.4%	30
2013 Q2	$128M	Buy	+595,193	New	+$128M	0.34%	45