Mark Stephen Berg is VP at PIONEER NATURAL RESOURCES CO (PXD). They have made 45 open-market trades across 4 companies since 2008, most recently 2026-05-18.
CIK 0001238881
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.
4 open-market purchases totalling $616K since 2008, against 41 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| PXD | SELL | 2024-03-07 | 2024-03-11 | $240.24 | $3.4M | +4.3% | +12.4% | N/A |
| PXD | SELL | 2022-06-08 | 2022-06-09 | $286.90 | $717K | -16.8% | -22.3% | -14.7% |
| PXD | SELL | 2022-05-17 | 2022-05-17 | $274.41 | $1.4M | +0.4% | -13.4% | -17.6% |
| PXD | SELL | 2022-03-30 | 2022-03-31 | $256.71 | $642K | +1.0% | -5.7% | -9.5% |
| PXD | SELL | 2021-03-05 | 2021-03-09 | $164.69 | $1.6M | +4.3% | -4.6% | +8.9% |
| PXD | SELL | 2020-11-25 | 2020-11-30 | $110.05 | $1.2M | +14.7% | +10.7% | +43.4% |
| PUMP | BUY | 2020-08-24 | 2020-08-25 | $6.11 | $150K | -6.3% | -39.3% | -3.3% |
| PXD | SELL | 2020-06-05 | 2020-06-09 | $111.93 | $414K | -12.1% | -14.1% | -11.4% |
| PXD | SELL | 2019-12-18 | 2019-12-19 | $145.88 | $438K | +2.4% | -1.0% | -61.9% |
| PXD | SELL | 2019-12-04 | 2019-12-06 | $129.60 | $259K | +10.4% | +19.7% | -10.2% |
| PXD | SELL | 2018-05-17 | 2018-05-21 | $212.32 | $531K | -8.6% | -12.7% | -17.9% |
| PXD | SELL | 2018-05-11 | 2018-05-14 | $201.95 | $404K | -3.9% | -4.0% | -8.9% |
| HPR | BUY | 2018-05-11 | 2018-05-14 | $6.38 | $201K | +11.9% | +1.1% | -22.4% |
| PXD | SELL | 2017-12-14 | 2017-12-15 | $157.85 | $316K | +10.4% | +16.8% | +6.6% |
| PXD | SELL | 2017-11-30 | 2017-12-04 | $154.47 | $309K | +0.1% | +12.8% | +9.8% |
| PXD | SELL | 2017-11-09 | 2017-11-13 | $160.79 | $322K | -1.5% | +0.4% | +9.4% |
| PXD | SELL | 2017-03-07 | 2017-03-08 | $194.22 | $291K | +0.8% | +4.0% | -7.6% |
| PXD | SELL | 2016-08-12 | 2016-08-16 | $174.32 | $349K | -0.1% | -0.6% | -3.3% |
| PXD | SELL | 2016-08-08 | 2016-08-10 | $171.53 | $343K | +4.8% | +4.4% | +1.2% |
| PXD | SELL | 2016-04-28 | 2016-05-02 | $168.71 | $1.2M | +2.1% | -2.5% | -3.9% |
| PXD | SELL | 2015-11-24 | 2015-11-24 | $147.95 | $444K | -8.8% | -0.7% | -0.1% |
| PXD | SELL | 2015-09-17 | 2015-09-21 | $125.96 | $315K | -8.8% | -0.7% | -0.7% |
| PXD | SELL | 2015-08-12 | 2015-08-14 | $127.67 | $319K | -8.8% | -0.7% | -0.7% |
| PXD | SELL | 2015-06-05 | 2015-06-08 | $152.85 | $503K | -8.8% | -0.7% | -0.7% |
| PXD | SELL | 2014-06-20 | 2014-06-24 | $230.03 | $345K | -8.8% | -0.7% | -0.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.