Christine A. Tsingos is CFO & VP at BIO-RAD LABORATORIES, INC. (BIO). They have made 19 open-market trades across 1 company since 2006, most recently 2026-05-19.
CIK 0001278861
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 19 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BIO | SELL | 2018-12-14 | 2018-12-17 | $248.00 | $350K | -6.0% | -3.2% | +28.3% |
| BIO | SELL | 2017-12-14 | 2017-12-14 | $249.40 | $2.5M | -4.0% | -0.5% | +7.6% |
| BIO | SELL | 2016-03-14 | 2016-03-14 | $137.67 | $858K | -2.0% | +2.1% | +6.0% |
| BIO | SELL | 2015-09-11 | 2015-09-14 | $138.26 | $40K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2015-09-09 | 2015-09-10 | $139.01 | $11K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2015-03-12 | 2015-03-12 | $135.94 | $734K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2014-11-20 | 2014-11-20 | $115.85 | $154K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2014-11-12 | 2014-11-13 | $112.22 | $786K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2012-09-10 | 2012-09-11 | $103.49 | $8K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2012-06-12 | 2012-06-13 | $96.51 | $7K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2012-06-11 | 2012-06-12 | $96.49 | $7K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2011-09-09 | 2011-09-12 | $94.85 | $7K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2011-06-14 | 2011-06-15 | $117.53 | $9K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2011-06-13 | 2011-06-14 | $117.30 | $9K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2011-03-04 | 2011-03-07 | $115.50 | $542K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2010-11-18 | 2010-11-18 | $95.03 | $855K | -8.1% | -0.7% | -0.7% |
| BIO | SELL · 10b5-1 | 2009-08-04 | 2009-08-05 | $76.00 | $6K | -8.1% | -0.7% | -0.7% |
| BIO | SELL · 10b5-1 | 2009-06-12 | 2009-06-16 | $74.80 | $5K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2008-08-14 | 2008-08-15 | $105.55 | $508K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2007-08-15 | 2007-08-16 | $80.29 | $241K | -8.1% | -0.7% | -0.7% |
| BIO | SELL | 2006-09-05 | 2006-09-06 | $73.66 | $258K | -8.1% | -0.7% | -0.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.