MARK STEPHEN BERG
CIK 1238881 · EVP, Corporate Operations · last filed 2026-05-21
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$645.9K
Companies
4
Total Filings
124
Lifetime Open-Market Net
-$23.61M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| PUMP | Director | 56,909 | $11.35 | $645.9K | $75.0K | 6 | 2026-05-21 |
| PIONEER NATURAL RESOURCES CO (PXD) Delisted | EVP, Corporate Operations | 0 | $269.62 | $0 | -$23.96M | 103 | 2024-05-03 |
| HighPoint Resources Corp (HPR) Delisted | Director | 2,772 | $4.73 | $13.1K | $100.3K | 10 | 2020-06-05 |
| Pioneer Southwest Energy Partners L.P. (PSE) Delisted | EVP, General Counsel | 0 | — | — | $169.9K | 4 | 2013-12-18 |
Recent Filings · Page 4 of 13
124 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2021-01-05 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Mixed | +7,352 | -$307.7K | EDGAR |
| 2020-12-04 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Tax (F) | −309 | -$31.1K | EDGAR |
| 2020-11-30 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Mixed | — | -$63.7K | EDGAR |
| 2020-08-25 | PUMP | Buy (P) | +12,274 | $75.0K | EDGAR |
| 2020-06-09 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Sell (S) | −3,700 | -$414.1K | EDGAR |
| 2020-06-05 | HighPoint Resources Corp (HPR) Delisted | Disp (D) | −79,423 | $0 | EDGAR |
| 2020-06-02 | HighPoint Resources Corp (HPR) Delisted | Grant (A) | +88,652 | $0 | EDGAR |
| 2020-03-05 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Grant (A) | +5,732 | $0 | EDGAR |
| 2020-02-27 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Tax (F) | −1,829 | -$229.5K | EDGAR |
| 2020-01-06 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Tax (F) | −1,408 | -$213.1K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.