Transactions
3
Insider / Diamondback Energy, Inc.
Plaumann Mark Lawrence
Director at Diamondback Energy, Inc.
- Company
- Diamondback Energy, Inc.
- Ticker
- FANG
- First filing on record
- May 21, 2026
- Latest trade on record
- August 21, 2026
- SEC filings
- EDGAR ↗
Plaumann Mark Lawrence, Director at Diamondback Energy, Inc., has disclosed 3 transactions in FANG since May 21, 2026: 0 purchases (0 open-market buys) and 2 sales, worth about $309K at the reported prices. The latest was filed August 24, 2026, 3 days after the trade.
Open-market buys
0
Sales
2
Avg. disclosure lag
1.7d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Plaumann Mark Lawrence made no purchases and 2 sales worth $309K, plus 1 other transaction. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Plaumann Mark Lawrence has traded 1 stock on record; the largest by dollars is FANG.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 3 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| S | Open-market sale | 2 | 1,500 | $309K |
| A | Grant or award | 1 | 982 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 3 | 0 | 2 · $309K |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| FANG | Sell S | August 21, 2026 | August 24, 2026 | 3d | 1,000 | $211 | $211K | Form 4 ↗ | ||
| FANG | Sell S | June 9, 2026 | June 10, 2026 | 1d | 500 | $197 | $98K | Form 4 ↗ | ||
| FANG | Other A | May 20, 2026 | May 21, 2026 | 1d | 982 | — | — | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| August 24, 2026 | Form 4 | 0001539838-26-000152 | 1 | published | EDGAR ↗ |
| June 10, 2026 | Form 4 | 0001539838-26-000128 | 1 | published | EDGAR ↗ |
| May 21, 2026 | Form 4 | 0001539838-26-000110 | 1 | published | EDGAR ↗ |
Other insiders at Diamondback Energy, Inc.
- Meloy Charles Alvin Director 52 rows
- Van't Hof Matthew Kaes Chief Executive Officer 19 rows
- Dick Teresa L. CAO, Exec. VP, Assist. Sec. 15 rows
- Zmigrosky Matt EVP, Chief Legal and Admin Off 15 rows
- Stice Travis D. Executive Chairman 14 rows
- Wesson Daniel N Exec. VP & COO 14 rows
- Thompson Jere W III CFO, Executive VP 11 rows
- Barkmann Albert Exec. VP and Chief Engineer 9 rows
- SGF FANG Holdings, LP Insider 8 rows
- McAllaster Chad EVP-Operations 3 rows
Everyone on file, with contracts and lobbying under the company's name: Diamondback Energy, Inc..
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 3 | 3 | May 21, 2026 | August 24, 2026 | Form 4 list on EDGAR |
Site built October 22, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.