Margaret Montemayor
CIK 1602114 · SVP, Chief Accounting Officer · last filed 2026-06-04
"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
$1.37M
Companies
3
Total Filings
47
Lifetime Open-Market Net
-$4.61M
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 |
|---|---|---|---|---|---|---|---|
| VST | SVP, Chief Accounting Officer | 9,760 | $140.52 | $1.37M | -$1.56M | 7 | 2026-06-04 |
| Vistra Corp. (VST.WS.A) Delisted | SVP, Chief Accounting Officer | 14,534 | $0.01 | $113 | $0 | 1 | 2023-11-16 |
| PIONEER NATURAL RESOURCES CO (PXD) Delisted | VP & CAO | 5,012 | $269.62 | $1.35M | -$3.05M | 37 | 2022-03-31 |
Recent Filings · Page 2 of 5
47 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 |
|---|---|---|---|---|---|
| 2022-03-31 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Sell (S) | −500 | -$125.2K | EDGAR |
| 2022-03-03 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Sell (S) | −3,855 | -$922.2K | EDGAR |
| 2022-02-22 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Tax (F) | −1,610 | -$375.7K | EDGAR |
| 2022-02-04 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Grant (A) | +2,301 | $0 | EDGAR |
| 2022-01-04 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Mixed | +1,293 | -$85.5K | EDGAR |
| 2021-03-05 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Sell (S) | −3,353 | -$529.5K | EDGAR |
| 2021-03-02 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Tax (F) | −605 | -$89.9K | EDGAR |
| 2021-02-23 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Tax (F) | −155 | -$20.8K | EDGAR |
| 2021-02-05 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Grant (A) | +2,294 | $0 | EDGAR |
| 2021-01-05 | PIONEER NATURAL RESOURCES CO (PXD) Delisted | Mixed | +998 | -$46.5K | 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.