Parnassus Investments
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Parnassus Investments’s Bio-Rad Laboratories Class A BIO Stock Holding History

Parnassus Investments’s Portfolio BIO Stock Details BIO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$70.9M Buy
254,305
+2,165
+0.9% +$624K 0.21% 66
2025
Q4 		$76.4M Sell
252,140
-63,188
-20% -$19.7M 0.2% 71
2025
Q3 		$88.4M Sell
315,328
-1,890
-0.6% -$514K 0.2% 65
2025
Q2 		$76.6M Sell
317,218
-893
-0.3% -$211K 0.18% 73
2025
Q1 		$77.5M Buy
318,111
+7,244
+2% +$2.18M 0.19% 82
2024
Q4 		$102M Buy
310,867
+135
+0% +$45.8K 0.23% 64
2024
Q3 		$104M Hold
310,732
– – 0.22% 64
2024
Q2 		$84.9M Buy
310,732
+72,942
+31% +$21.2M 0.18% 73
2024
Q1 		$82.2M Hold
237,790
– – 0.18% 81
2023
Q4 		$76.8M Buy
237,790
+16,999
+8% +$5.33M 0.17% 91
2023
Q3 		$79.1M Buy
+220,791
New +$85.2M 0.19% 89

Other funds holding BIO

First Eagle Investment Management
First Eagle Investment Management New York $59B AUM 32.99% 1-Year Est. Return
BlackRock
BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
AI
Ariel Investments Chicago, Illinois $8.93B AUM 29.58% 1-Year Est. Return
EARNEST Partners
EARNEST Partners Atlanta, Georgia $24.3B AUM 34.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return