Bio-Rad Laboratories, Inc. Class B BIO.B

Open calendar →

Bio-Rad Laboratories, Inc. Class B Common Stock · Company · NYSE

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 257.75 → 309.37 · 20.0%
321.120284.085247.050 1 2,3 4 5 6,7 8 9 10 11 12 13,14 Jul 25Oct 25Jan 26Apr 26Jul 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 22 Jul 2025 — 23 Jul 2026 (Last year)

Daily NYSE prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
No data yet
309.3700 309.3700 309.3700 309.3700 0
309.3700 309.3700 309.3700 309.3700 0
Weekend
Weekend
309.3700 309.3700 309.3700 309.3700 0
309.3700 309.3700 309.3700 309.3700 0
309.3700 309.3700 309.3700 309.3700 0
309.3700 309.3700 309.3700 309.3700 0
309.3700 309.3700 309.3700 309.3700 100
Weekend
Weekend
298.5000 298.5000 298.5000 298.5000 100
293.3700 293.3700 293.3700 293.3700 0
293.3700 293.3700 293.3700 293.3700 300
296.4900 296.4900 296.4900 296.4900 0
296.4900 296.4900 296.4900 296.4900 0
Weekend
Weekend
No trading
296.4900 296.4900 296.4900 296.4900 0
296.4900 296.4900 296.4900 296.4900 0
296.4900 296.4900 296.4900 296.4900 0
296.4900 296.4900 296.4900 296.4900 0
Weekend
Weekend
296.4900 296.4900 296.4900 296.4900 0
296.4900 296.4900 296.4900 296.4900 0
291.9900 296.4900 291.9900 296.4900 200
297.2200 297.9600 289.2300 290.0000 800
304.1500 304.1500 304.1500 304.1500 0
Weekend
Weekend
No trading
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
Weekend
Weekend
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
Weekend
Weekend
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
Weekend
Weekend
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 0
304.1500 304.1500 304.1500 304.1500 100
267.4300 267.4300 267.4300 267.4300 0
No trading
Weekend
Weekend
267.4300 267.4300 267.4300 267.4300 0
267.4300 267.4300 267.4300 267.4300 0
267.4300 267.4300 267.4300 267.4300 0
267.4300 267.4300 267.4300 267.4300 0
267.4300 267.4300 267.4300 267.4300 100
Weekend
Weekend
253.1700 260.9000 253.1300 260.9000 600
244.5400 260.0000 244.5400 260.0000 3,400
255.5400 255.5400 255.5400 255.5400 0
255.5400 255.5400 255.5400 255.5400 0
255.5400 255.5400 255.5400 255.5400 0
Weekend
Weekend
255.5400 255.5400 255.5400 255.5400 400
261.2700 261.2700 261.2700 261.2700 0
261.4000 261.4000 261.2700 261.2700 100
257.7100 258.4600 255.9000 258.4600 900
299.4500 299.4500 299.4500 299.4500 0
Weekend
Weekend
299.4500 299.4500 299.4500 299.4500 0
14 · 10-Q After-hours · 16:19 ET 10-Q ↗ 13 · 8-K After-hours · 16:17 ET 8-K ↗
299.4500 299.4500 299.4500 299.4500 0
299.4500 299.4500 299.4500 299.4500 0
299.4500 299.4500 299.4500 299.4500 0
299.4500 299.4500 299.4500 299.4500 0
Weekend
Weekend
12 · 8-K After-hours · 16:30 ET 8-K ↗
299.4500 299.4500 299.4500 299.4500 0
299.4500 299.4500 299.4500 299.4500 0
299.4500 299.4500 299.4500 299.4500 100
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 0
Weekend
Weekend
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 0
Weekend
Weekend
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 0
277.0000 277.0000 277.0000 277.0000 100
278.2500 278.2500 278.2500 278.2500 0
Weekend
Weekend
No trading
278.2500 278.2500 278.2500 278.2500 0
278.2500 278.2500 278.2500 278.2500 0
278.3000 278.3000 278.2500 278.2500 200
268.5500 268.5500 268.5500 268.5500 0
Weekend
Weekend
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 0
11 · DEF 14A After-hours · 16:17 ET DEFINITIVE PROXY STATEMENT ↗
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 0
Weekend
Weekend
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 0
Weekend
Weekend
268.5500 268.5500 268.5500 268.5500 0
268.5500 268.5500 268.5500 268.5500 100
268.5000 268.5000 268.5000 268.5000 0
268.5000 268.5000 268.5000 268.5000 0
267.8000 268.5000 267.5900 268.5000 300
Weekend
Weekend
281.9500 281.9500 281.9500 281.9500 0
281.9500 281.9500 281.9500 281.9500 0
281.9500 281.9500 281.9500 281.9500 100
268.8900 268.8900 268.8900 268.8900 0
268.8900 268.8900 268.8900 268.8900 0
Weekend
Weekend
268.8900 268.8900 268.8900 268.8900 0
268.8900 268.8900 268.8900 268.8900 0
268.8900 268.8900 268.8900 268.8900 0
268.8900 268.8900 268.8900 268.8900 0
268.8900 268.8900 268.8900 268.8900 100
Weekend
Weekend
261.8300 261.8300 261.8300 261.8300 0
10 · 8-K After-hours · 16:15 ET 8-K ↗
261.8300 261.8300 261.8300 261.8300 0
261.8300 261.8300 261.8300 261.8300 100
257.0500 257.0500 257.0500 257.0500 0
No trading
Weekend
Weekend
257.0500 257.0500 257.0500 257.0500 100
9 · 10-K Next filing day · accepted 12 Feb, 21:50 ET 10-K ↗ 8 · 8-K After-hours · 16:16 ET 8-K ↗
295.0500 295.0500 295.0500 295.0500 0
295.0500 295.0500 295.0500 295.0500 0
295.0500 295.0500 295.0500 295.0500 0
295.0500 295.0500 295.0500 295.0500 0
Weekend
Weekend
295.0500 295.0500 295.0500 295.0500 0
295.0500 295.0500 295.0500 295.0500 0
295.0500 295.0500 295.0500 295.0500 0
295.0500 295.0500 295.0500 295.0500 0
291.3600 295.0500 291.3600 295.0500 1,900
Weekend
Weekend
312.7500 312.7500 312.7500 312.7500 0
312.7500 312.7500 312.7500 312.7500 0
312.7500 312.7500 312.7500 312.7500 0
312.7500 312.7500 312.7500 312.7500 0
312.7500 312.7500 312.7500 312.7500 0
Weekend
Weekend
312.7500 312.7500 312.7500 312.7500 0
312.7500 312.7500 312.7500 312.7500 0
312.7500 312.7500 312.7500 312.7500 0
312.7500 312.7500 312.7500 312.7500 100
No trading
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
No trading
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
No trading
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
No trading
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
Weekend
Weekend
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.7000 310.7000 310.7000 310.7000 0
310.4500 310.7000 310.4500 310.7000 100
Weekend
Weekend
315.0800 315.0800 314.4000 314.4000 100
305.4000 305.4000 305.4000 305.4000 0
305.4000 305.4000 305.4000 305.4000 0
305.4000 305.4000 305.4000 305.4000 0
305.4000 305.4000 305.4000 305.4000 0
Weekend
Weekend
305.4000 305.4000 305.4000 305.4000 0
305.4000 305.4000 305.4000 305.4000 200
305.7900 306.1000 305.5500 305.8500 2,100
303.1500 303.1500 303.1500 303.1500 0
303.1500 303.1500 303.1500 303.1500 0
Weekend
Weekend
303.1500 303.1500 303.1500 303.1500 0
303.3500 303.3500 303.1500 303.1500 400
7 · 10-Q After-hours · 16:18 ET 10-Q ↗ 6 · 8-K After-hours · 16:16 ET 8-K ↗
321.1200 321.1200 321.1200 321.1200 0
321.1200 321.1200 321.1200 321.1200 0
321.1200 321.1200 321.1200 321.1200 0
Weekend
Weekend
321.1200 321.1200 321.1200 321.1200 0
321.1200 321.1200 321.1200 321.1200 0
321.1200 321.1200 321.1200 321.1200 0
321.1200 321.1200 321.1200 321.1200 200
284.8800 284.8800 284.8800 284.8800 0
Weekend
Weekend
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
Weekend
Weekend
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
Weekend
Weekend
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
5 · 8-K Pre-market · 06:02 ET 8-K ↗
284.8800 284.8800 284.8800 284.8800 0
Weekend
Weekend
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
284.8800 284.8800 284.8800 284.8800 0
Weekend
Weekend
283.8500 284.8800 283.8500 284.8800 400
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
No trading
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
4 · 8-K Pre-market · 09:00 ET 8-K ↗
247.0500 247.0500 247.0500 247.0500 0
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
3 · 10-Q After-hours · 16:17 ET 10-Q ↗ 2 · 8-K After-hours · 16:15 ET 8-K ↗
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
1 · 8-K After-hours · 16:14 ET 8-K ↗
247.0500 247.0500 247.0500 247.0500 0
Weekend
Weekend
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 0
247.0500 247.0500 247.0500 247.0500 200
257.7500 257.7500 257.7500 257.7500 0

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.