Baker Bros. Advisors’s Cerus CERS Stock Holding History

Baker Bros. Advisors’s Portfolio CERS Stock Details CERS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$18.2M	Hold	10,008,345	–	–	0.1%	57
2025 Q4	$20.6M	Hold	10,008,345	–	–	0.12%	52
2025 Q3	$15.9M	Sell	10,008,345 -2,875,499	-22%	-$3.88M	0.12%	51
2025 Q2	$18.2M	Sell	12,883,844 -6,467,243	-33%	-$8.62M	0.18%	40
2025 Q1	$26.9M	Sell	19,351,087 -126,252	-0.6%	-$211K	0.3%	30
2024 Q4	$30M	Hold	19,477,339	–	–	0.32%	34
2024 Q3	$33.9M	Hold	19,477,339	–	–	0.35%	31
2024 Q2	$34.3M	Hold	19,477,339	–	–	0.44%	30
2024 Q1	$36.8M	Hold	19,477,339	–	–	0.46%	32
2023 Q4	$42.1M	Buy	19,477,339 +2,237,838	+13%	+$3.69M	0.48%	26
2023 Q3	$27.9M	Buy	17,239,501 +1,171,943	+7%	+$2.44M	0.16%	30
2023 Q2	$39.5M	Hold	16,067,558	–	–	0.23%	29
2023 Q1	$47.7M	Hold	16,067,558	–	–	0.26%	23
2022 Q4	$58.6M	Hold	16,067,558	–	–	0.35%	22
2022 Q3	$57.8M	Hold	16,067,558	–	–	0.38%	25
2022 Q2	$85M	Buy	16,067,558 +2,354,363	+17%	+$11.8M	0.48%	16
2022 Q1	$75.3M	Hold	13,713,195	–	–	0.43%	20
2021 Q4	$93.4M	Hold	13,713,195	–	–	0.45%	19
2021 Q3	$83.5M	Hold	13,713,195	–	–	0.37%	22
2021 Q2	$81M	Hold	13,713,195	–	–	0.36%	26
2021 Q1	$82.4M	Hold	13,713,195	–	–	0.36%	24
2020 Q4	$94.9M	Hold	13,713,195	–	–	0.36%	20
2020 Q3	$85.8M	Hold	13,713,195	–	–	0.34%	20
2020 Q2	$90.5M	Hold	13,713,195	–	–	0.4%	20
2020 Q1	$63.8M	Buy	13,713,195 +2,963,258	+28%	+$13.4M	0.39%	21
2019 Q4	$45.4M	Hold	10,749,937	–	–	0.24%	31
2019 Q3	$55.4M	Hold	10,749,937	–	–	0.38%	23
2019 Q2	$60.4M	Hold	10,749,937	–	–	0.41%	23
2019 Q1	$67M	Hold	10,749,937	–	–	0.43%	25
2018 Q4	$54.5M	Hold	10,749,937	–	–	0.45%	20
2018 Q3	$77.5M	Hold	10,749,937	–	–	0.51%	20
2018 Q2	$71.7M	Hold	10,749,937	–	–	0.54%	20
2018 Q1	$58.9M	Buy	10,749,937 +1,004,728	+10%	+$4.57M	0.5%	26
2017 Q4	$32.9M	Hold	9,745,209	–	–	0.29%	33
2017 Q3	$26.6M	Sell	9,745,209 -496,734	-5%	-$1.22M	0.22%	29
2017 Q2	$25.7M	Sell	10,241,943 -2,811,332	-22%	-$9M	0.22%	27
2017 Q1	$58.1M	Hold	13,053,275	–	–	0.48%	19
2016 Q4	$56.8M	Hold	13,053,275	–	–	0.56%	22
2016 Q3	$81.1M	Sell	13,053,275 -500,000	-4%	-$3.27M	0.74%	14
2016 Q2	$84.6M	Hold	13,553,275	–	–	0.89%	14
2016 Q1	$80.4M	Hold	13,553,275	–	–	0.85%	16
2015 Q4	$85.7M	Hold	13,553,275	–	–	0.71%	21
2015 Q3	$61.5M	Hold	13,553,275	–	–	0.57%	20
2015 Q2	$70.3M	Hold	13,553,275	–	–	0.62%	22
2015 Q1	$56.5M	Buy	13,553,275 +1,850,548	+16%	+$9.48M	0.47%	23
2014 Q4	$73M	Sell	11,702,727 -237,451	-2%	-$1.08M	0.75%	19
2014 Q3	$47.9M	Buy	11,940,178 +1,693,587	+17%	+$6.51M	0.6%	22
2014 Q2	$42.5M	Buy	10,246,591 +1,791,285	+21%	+$7.67M	0.52%	26
2014 Q1	$40.6M	Hold	8,455,306	–	–	0.52%	28
2013 Q4	$54.5M	Hold	8,455,306	–	–	0.77%	20
2013 Q3	$56.8M	Hold	8,455,306	–	–	0.81%	19
2013 Q2	$37.4M	Buy	+8,455,306	New	+$40.9M	0.74%	21

Other funds holding CERS

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

AIM

ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return

SCM

Soleus Capital Management Greenwich, Connecticut $2.47B AUM 115.63% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

NAMA

Nikko Asset Management Americas New York $7.07B AUM 50.91% 1-Year Est. Return

Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $154B AUM 29.96% 1-Year Est. Return

SAM

Silvercrest Asset Management New York $13.8B AUM 28.39% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Baker Bros. Advisors's CERS Position: Q1 2026 in Review

Baker Bros. Advisors held its Cerus (CERS) position steady in Q1 2026 at 10,008,345 shares worth $18.2M. The position accounts for 0.1% of the portfolio, ranked #57.

Baker Bros. Advisors first reported a position in CERS in Q2 2013 and has held it in 52 quarters since. The position peaked at $94.9M in Q4 2020. 168 funds tracked by Wall St. Rank hold CERS as of Q1 2026.

Baker Bros. Advisors held 10,008,345 shares of Cerus worth $18.2M as of Q1 2026.
Baker Bros. Advisors left its Cerus share count unchanged in Q1 2026.
Cerus made up 0.1% of Baker Bros. Advisors's portfolio in Q1 2026, its #57 holding.
Baker Bros. Advisors first reported a position in Cerus in Q2 2013 and has held it in 52 quarters since.
Baker Bros. Advisors's Cerus position peaked at $94.9M in Q4 2020.
168 funds tracked by Wall St. Rank held Cerus as of Q1 2026.

Based on Baker Bros. Advisors's 13F filing for Q1 2026, filed 15 May 2026.