Stephen P. Casper is Director at MARKETAXESS HOLDINGS INC (MKTX). They have made 16 open-market trades across 1 company since 2011, most recently 2025-09-08.
CIK 0001296969
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.
1 open-market purchase totalling $4K since 2011, against 15 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| MKTX | 43,208 | $7.2M |
Shares reported on the most recent Form 4, priced at the 2025-09-09 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| MKTX | SELL | 2025-09-08 | 2025-09-09 | $186.59 | $299K | -4.4% | -7.7% | -11.5% |
| MKTX | SELL | 2024-09-06 | 2024-09-09 | $259.39 | $259K | +0.4% | +6.7% | -6.7% |
| MKTX | SELL | 2024-06-07 | 2024-06-11 | $199.48 | $100K | -0.9% | +8.0% | +30.1% |
| MKTX | SELL | 2020-12-15 | 2020-12-16 | $554.96 | $416K | +0.2% | -7.2% | -8.3% |
| MKTX | SELL | 2020-08-27 | 2020-08-28 | $500.00 | $250K | -6.8% | -1.8% | +10.2% |
| MKTX | SELL | 2020-05-05 | 2020-05-07 | $479.44 | $959K | -0.7% | +1.3% | +5.8% |
| MKTX | SELL | 2019-09-03 | 2019-09-05 | $402.82 | $403K | -17.2% | -16.0% | -4.8% |
| MKTX | SELL | 2019-06-07 | 2019-06-10 | $337.30 | $34K | -2.9% | +2.4% | +8.3% |
| MKTX | SELL | 2017-11-29 | 2017-11-30 | $195.84 | $392K | +0.8% | +4.1% | +3.5% |
| MKTX | SELL | 2017-05-17 | 2017-05-18 | $184.70 | $42K | +4.1% | +13.6% | +5.4% |
| MKTX | SELL | 2016-05-09 | 2016-05-11 | $127.69 | $47K | +3.8% | +9.6% | +24.8% |
| MKTX | SELL | 2015-12-07 | 2015-12-08 | $112.40 | $169K | -6.3% | -2.5% | +11.1% |
| MKTX | SELL | 2015-02-10 | 2015-02-11 | $80.35 | $51K | -6.3% | -0.5% | -0.5% |
| MKTX | SELL | 2014-12-08 | 2014-12-09 | $69.06 | $138K | -6.3% | -0.5% | -0.5% |
| MKTX | SELL | 2014-07-30 | 2014-08-01 | $57.05 | $110K | -6.3% | -0.5% | -0.5% |
| MKTX | BUY | 2011-05-05 | 2011-05-10 | $22.20 | $4K | -6.3% | -0.5% | -0.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.