Charles W. Olson is VP at SURMODICS INC (SRDX). They have made 14 open-market trades across 1 company since 2007, most recently 2025-11-19.
CIK 0001286125
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 14 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SRDX | 51,478 | $2.2M |
Shares reported on the most recent Form 4, priced at the 2024-12-06 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| SRDX | SELL | 2021-08-31 | 2021-09-01 | $59.75 | $77K | -4.9% | -5.4% | -26.5% |
| SRDX | SELL | 2021-04-28 | 2021-04-30 | $59.75 | $90K | -1.8% | -1.6% | +2.7% |
| SRDX | SELL · 10b5-1 | 2021-04-16 | 2021-04-20 | $59.75 | $39K | -6.2% | -5.8% | -7.0% |
| SRDX | SELL | 2021-03-31 | 2021-04-02 | $56.75 | $540K | +1.3% | +0.7% | -3.9% |
| SRDX | SELL | 2018-06-11 | 2018-06-13 | $55.00 | $550K | -0.3% | +7.3% | +41.3% |
| SRDX | SELL | 2018-05-24 | 2018-05-29 | $48.54 | $1.9M | +6.2% | +9.2% | +48.5% |
| SRDX | SELL · 10b5-1 | 2017-09-15 | 2017-09-19 | $27.85 | $22K | +3.0% | +3.0% | -2.2% |
| SRDX | SELL · 10b5-1 | 2016-12-22 | 2016-12-27 | $26.00 | $31K | -2.9% | -5.0% | -10.0% |
| SRDX | SELL | 2016-12-08 | 2016-12-12 | $26.02 | $192K | +2.4% | -1.0% | -5.5% |
| SRDX | SELL · 10b5-1 | 2016-11-23 | 2016-11-28 | $26.02 | $13K | +2.0% | +2.0% | +0.2% |
| SRDX | SELL | 2016-08-17 | 2016-08-18 | $28.65 | $57K | -0.4% | -2.1% | -13.5% |
| SRDX | SELL | 2016-08-16 | 2016-08-18 | $29.01 | $490K | -0.4% | -2.1% | -13.5% |
| SRDX | SELL | 2016-08-16 | 2016-08-18 | $29.18 | $128K | -0.4% | -2.1% | -13.5% |
| SRDX | SELL | 2016-08-01 | 2016-08-03 | $27.08 | $339K | +4.9% | +6.5% | -9.7% |
| SRDX | SELL | 2016-08-01 | 2016-08-03 | $27.08 | $339K | +4.9% | +6.5% | -9.7% |
| SRDX | SELL · 10b5-1 | 2015-08-05 | 2015-08-07 | $26.16 | $262K | -8.1% | -4.8% | -4.8% |
| SRDX | SELL · 10b5-1 | 2014-12-08 | 2014-12-31 | $21.98 | $112K | -8.1% | -4.8% | -4.8% |
| SRDX | SELL · 10b5-1 | 2013-03-05 | 2013-03-07 | $26.33 | $5K | -8.1% | -4.8% | -4.8% |
| SRDX | SELL | 2009-11-16 | 2009-11-17 | $23.80 | $262K | -8.1% | -4.8% | -4.8% |
| SRDX | SELL | 2009-05-19 | 2009-05-20 | $20.31 | $182K | -8.1% | -4.8% | -4.8% |
| SRDX | SELL | 2007-08-16 | 2007-08-20 | $50.16 | $519K | -8.1% | -4.8% | -4.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.