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Bio-Rad Laboratories stock timeline
A year of the price with every insider trade, planned sale, earnings report and material 8-K marked
252 sessions+24.5% to $381.57
Bio-Rad Laboratories (BIO) stock rose 24% over the last 252 sessions, to $381.57. On the way it reported 4 quarters, its insiders filed 1 open-market trade, and the company filed 2 material 8-Ks. Each is marked on the price and listed with what the stock did next.
Each mark, and what followed
| Date | Kind | What | Next session | 5 sessions | 21 sessions |
|---|---|---|---|---|---|
| Nov 4, 2026 | Earnings | Earnings: beat the EPS estimate by 19.1% | +1.3% (−0.3% vs SPY) | — | — |
| Aug 4, 2026 | 8-K | Exit or disposal costs | +4.4% (+4.6% vs SPY) | +6.8% (+6.9% vs SPY) | +15.4% (+16.2% vs SPY) |
| Aug 4, 2026 | Earnings | Earnings: beat the EPS estimate by 50.1% | −0.5% (−2.3% vs SPY) | +5.8% (+3.7% vs SPY) | +12.9% (+12.4% vs SPY) |
| May 11, 2026 | Insider sale | Engelhardt Eva Anette sold $136K | −4.2% (−4.5% vs SPY) | −2.7% (−2.9% vs SPY) | +15.6% (+15.6% vs SPY) |
| Apr 30, 2026 | Earnings | Earnings: missed the EPS estimate by -4.8% | +1.8% (+0.8% vs SPY) | −6.0% (−9.1% vs SPY) | +12.7% (+6.6% vs SPY) |
| Apr 24, 2026 | 8-K | Directors and officers: departures, appointments, pay | −0.2% (−0.4% vs SPY) | −11.5% (−12.4% vs SPY) | +3.1% (−1.9% vs SPY) |
| Feb 12, 2026 | Earnings | Earnings: missed the EPS estimate by -7.0% | −0.4% (+1.1% vs SPY) | −7.7% (−6.6% vs SPY) | −11.1% (−6.7% vs SPY) |
Insiders’ record here
In the year on the chart, Bio-Rad Laboratories' insiders reported 0 open-market buys ($0) and 1 sale ($136K). Of the 1 old enough to score, 0 were followed by the stock doing what the trade implied over the next 63 sessions (beating SPY after a buy, lagging it after a sale); the median excess return after a buy was — and after a sale +41.9%.
Across the whole universe (19,782 scored trades), insider buys beat the market 46% of the time and sales were followed by a lagging stock 61% of the time; buys of $1M or more 39%. Every pattern →
What this kind of 8-K usually did
| Item | 8-Ks | Next session, median | Up next session | 21 sessions, median | Typical size |
|---|---|---|---|---|---|
| 5.02 Directors and officers: departures, appointments, pay | 39,174 | −0.1% | 48% | +0.7% | ±1.4% |
| 2.05 Exit or disposal costs | 954 | −0.2% | 47% | +0.5% | ±2.4% |
Across every company in the move-odds universe, measured from the close before the filing. Every 8-K item ranked →
Report card: every quarter against the estimate → Bio-Rad Laboratories: every quarter → Live insider trades →
Prices are daily closes; filings and trades are as filed with the SEC (Form 4 within two business days of the trade, 8-K within four of the event). Moves after a mark are the stock's close-to-close change and the same for SPY; they describe the record, not what the next one will do. Not investment advice.