Twin Tree Management’s Bio-Rad Laboratories Class A BIO Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q2	–	Sell	-357	Closed	-$87K	–	1641
2025 Q1	$87K	Buy	+357	New	+$107K	﹤0.01%	1424
2024 Q2	–	Hold	0	–	–	–	1382
2024 Q1	–	Sell	-28,402	Closed	-$9.34M	–	1302
2023 Q4	$9.17M	Buy	+28,402	New	+$8.9M	0.17%	712
2023 Q1	–	Sell	-1,727	Closed	-$726K	–	1309
2022 Q4	$726K	Buy	+1,727	New	+$697K	0.02%	1072
2021 Q4	–	Sell	-1,392	Closed	-$1.04M	–	1603
2021 Q3	$1.04M	Buy	+1,392	New	+$1.04M	0.03%	1178
2021 Q2	–	Hold	0	–	–	–	1361
2021 Q1	–	Hold	0	–	–	–	1379
2020 Q2	–	Sell	-19	Closed	-$7K	–	1474
2020 Q1	$7K	Sell	19 -4,941	-100%	-$1.82M	﹤0.01%	1270
2019 Q4	$1.83M	Sell	4,960 -3,290	-40%	-$1.16M	0.11%	745
2019 Q3	$2.75M	Buy	8,250 +3,679	+80%	+$1.2M	0.2%	617
2019 Q2	$1.43M	Sell	4,571 -22,487	-83%	-$6.73M	0.1%	727
2019 Q1	$8.27M	Buy	27,058 +23,644	+693%	+$6.38M	0.62%	339
2018 Q4	$793K	Buy	+3,414	New	+$916K	0.05%	903
2018 Q2	–	Sell	-4,999	Closed	-$1.25M	–	1155
2018 Q1	$1.25M	Sell	4,999 -1,467	-23%	-$374K	0.11%	622
2017 Q4	$1.54M	Buy	+6,466	New	+$1.57M	0.13%	635