BIO-RAD LABORATORIES, INC.BIO-B

3 13D/G filings 2 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 2 activist filings on this issuer

Median 30d

+12.7%

avg +12.7%

Median 60d

+9.1%

avg +9.1%

Median 90d

+9.1%

avg +9.1%

Median 180d

-5.7%

avg -5.7%

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Activist filings

2 SCHEDULE · 1 SC

Distinct filers

multi-activist cluster

Insiders (365d)

0 buys · 0 sales

Latest short DTC

—

no FINRA match

Filed	Form	Filer	Stake	Shares
2025-10-28	SCHEDULE	SCHWARTZ NORMAN D	14.60%	3,228,922	view →
2025-10-28	SCHEDULE	SCHWARTZ NORMAN D	97.20%	4,929,036	view →
2019-07-12	SC	SCHWARTZ ALICE N	—	—	view →

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