SCHWARTZ NORMAN D → BIO-RAD LABORATORIES, INC. BIO-B

Stake: 97.20% Shares: 4,929,036 CUSIP: 090572207 Class: Class B Common Stock

Item 4 — Purpose of Transaction

Item 4 to the Schedule 13D is hereby amended, in pertinent part, as follows: The purpose of the Shareholders' ownership of Bio-Rad shares has been control of the Company. The Shareholders control the management of the Company and may be deemed to be "parents" of the Company as that term is defined in the Rules and Regulations of the Commission.

Cross-References

Insider Activity (last 365d)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

3 13D/G filings on this issuer

2 other filings besides this one

Filer Track Record

2 filings by this filer

1 other filing in the data moat

Short Interest

—

Not in latest FINRA snapshot

Post-Filing Returns · since 2025-09-25 on BIO-B

+1 day

0.0%

+5 days

0.0%

+30 days

+12.7%

+60 days

+9.1%

+90 days

+9.1%

+180 days

-5.7%

Anchor price 284.88 on closest trading day on/after 2025-09-25. Source: Yahoo Finance daily adj_close (split + dividend adjusted).

Other 13D/G Filings on BIO-RAD LABORATORIES, INC.

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

Other Filings by SCHWARTZ NORMAN D

Filed	Form	Issuer	Stake	Shares
2025-10-28	SCHEDULE	BIO-RAD LABORATORIES, INC. BIO-B	14.60%	3,228,922	view →

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