Diamondback Energy insider activity
What the executives and directors of Diamondback Energy actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.
−$7.0B
net open-market flow, 12 m
0 open-market buys, 12 m
0.6%
of sale value on 10b5-1 plans, 12 m
570 days since an insider bought, whole record
The tape: three years of insider trades
Open-market buy
Discretionary sale
Planned sale (10b5-1)
Reported-price path
Routine
Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling.
The 83 routine events on the chart, as a list
| Date | Insider | Shares |
|---|---|---|
| Sep 16, 2026 | Meloy Charles Alvin | 75K |
| Sep 10, 2026 | Zmigrosky Matt | 861 |
| Sep 10, 2026 | Barkmann Albert | 682 |
| Jun 17, 2026 | Van't Hof Matthew Kaes | 2,674 |
| May 20, 2026 | HOLDERNESS DARIN G | 982 |
| May 20, 2026 | REEVES ROBERT K | 982 |
| May 20, 2026 | WEST STEVEN E | 982 |
| May 20, 2026 | Plaumann Mark Lawrence | 982 |
| May 20, 2026 | Meloy Charles Alvin | 982 |
| May 20, 2026 | Trent Melanie Montague | 982 |
| May 20, 2026 | KLEIN REBECCA A | 982 |
| May 20, 2026 | Stice Travis D. | 982 |
| May 20, 2026 | Robertson Lance W | 982 |
| May 20, 2026 | Mains Stephanie K. | 982 |
| May 20, 2026 | Brooks Vincent K | 982 |
| May 20, 2026 | Tsuru Frank D. | 982 |
| Mar 8, 2026 | Wesson Daniel N | 520 |
| Mar 1, 2026 | Dick Teresa L. | 34K |
| Mar 1, 2026 | Stice Travis D. | 141K |
| Mar 1, 2026 | Van't Hof Matthew Kaes | 87K |
| Mar 1, 2026 | Zmigrosky Matt | 40K |
| Mar 1, 2026 | Wesson Daniel N | 54K |
| Mar 1, 2026 | Barkmann Albert | 13K |
| Mar 1, 2026 | Thompson Jere W III | 19K |
| Mar 1, 2026 | McAllaster Chad | 4,935 |
| Dec 4, 2025 | Meloy Charles Alvin | 125K |
| Nov 18, 2025 | Van't Hof Matthew Kaes | 1,011 |
| Nov 14, 2025 | Stice Travis D. | 50K |
| Nov 12, 2025 | Meloy Charles Alvin | 34K |
| Sep 10, 2025 | Zmigrosky Matt | 861 |
| Sep 10, 2025 | Barkmann Albert | 682 |
| May 21, 2025 | HOLDERNESS DARIN G | 1,417 |
| May 21, 2025 | REEVES ROBERT K | 1,417 |
| May 21, 2025 | WEST STEVEN E | 1,417 |
| May 21, 2025 | Plaumann Mark Lawrence | 1,417 |
| May 21, 2025 | Meloy Charles Alvin | 1,417 |
| May 21, 2025 | Trent Melanie Montague | 1,417 |
| May 21, 2025 | KLEIN REBECCA A | 1,417 |
| May 21, 2025 | Robertson Lance W | 1,417 |
| May 21, 2025 | Van't Hof Matthew Kaes | 11K |
| May 21, 2025 | Mains Stephanie K. | 1,417 |
| May 21, 2025 | Brooks Vincent K | 1,417 |
| May 21, 2025 | Tsuru Frank D. | 1,417 |
| Mar 1, 2025 | Dick Teresa L. | 41K |
| Mar 1, 2025 | Stice Travis D. | 189K |
| Mar 1, 2025 | Van't Hof Matthew Kaes | 80K |
| Mar 1, 2025 | Zmigrosky Matt | 42K |
| Mar 1, 2025 | Wesson Daniel N | 54K |
| Mar 1, 2025 | Barkmann Albert | 11K |
| Mar 1, 2025 | Thompson Jere W III | 16K |
| Mar 1, 2025 | McAllaster Chad | 3,690 |
| Feb 3, 2025 | HOLDERNESS DARIN G | 399 |
| Dec 5, 2024 | Plaumann Mark Lawrence | 100 |
| Nov 14, 2024 | Meloy Charles Alvin | 110K |
| Nov 13, 2024 | Plaumann Mark Lawrence | 2,310 |
| Sep 10, 2024 | REEVES ROBERT K | 820 |
| Sep 10, 2024 | Meloy Charles Alvin | 820 |
| Sep 10, 2024 | Robertson Lance W | 820 |
| Sep 10, 2024 | Zmigrosky Matt | 11K |
| Sep 10, 2024 | Barkmann Albert | 5,193 |
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
The chart, in numbers
| Flow | Shares |
|---|---|
| From holdings | 38M |
| Granted | 294K |
| Withheld for tax | 113K |
| Planned sales (10b5-1) | 227K |
| Discretionary sales | 37M |
| Gifts | 250K |
Skin in the game
Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades.
The chart, in numbers
| Insider | Start of the window | Latest reported | Indexed, start = 100 |
|---|---|---|---|
| Greth Lyndal | 100M | 65M | 65.2 |
| SGF FANG Holdings, LP | 100M | 65M | 65.2 |
Who holds what
the 14 largest holdings of 31| Insider | Role | Shares held | Buys 12 m | Sales 12 m | 12 m | Last trade |
|---|---|---|---|---|---|---|
| Greth Lyndal Last trade Sep 16, 2026 | 10% owner | 75M | – | $6.9B | net selling over the year: 0 months buying, 5 months selling | Sep 16, 2026 |
| SGF FANG Holdings, LP | 10% owner | 65M | – | – | – | |
| Autry Stephens Management Trust | 10% owner | 10M | – | – | – | |
| Endeavor Manager, LLC | 10% owner | 10M | – | – | – | |
| Stephens Family Trust #2 | 10% owner | 10M | – | – | – | |
| Stephens Family Trust | 10% owner | 10M | – | – | – | |
| SFT 2 Holdings, LLC | 10% owner | 10M | – | – | – | |
| SFT 1 Holdings, LLC | 10% owner | 10M | – | – | – | |
| SFT Management, LLC | 10% owner | 10M | – | – | – | |
| ACS Capital Management, LLC | 10% owner | 10M | – | – | – | |
| ACS Capital Holdings, LP | 10% owner | 10M | – | – | – | |
| Stice Travis D. Executive Chairman Last trade Sep 11, 2026 | Officer | 356K | – | $33M | net selling over the year: 0 months buying, 2 months selling | Sep 11, 2026 |
| Van't Hof Matthew Kaes Chief Executive Officer Last trade Aug 20, 2026 | CEO | 116K | – | $9.5M | net selling over the year: 0 months buying, 4 months selling | Aug 20, 2026 |
| Dick Teresa L. EVP Accounting, Assist. Sec. Last trade Sep 15, 2026 | Officer | 76K | – | $8.4M | net selling over the year: 0 months buying, 4 months selling | Sep 15, 2026 |
Open-market trade log
the 60 most recent of 553| Date | Insider | Type | Shares | Price | Value | Since trade | Filed |
|---|---|---|---|---|---|---|---|
| Sep 16, 2026 | Greth Lyndal (10% owner) 9.1M shares $205.26 +2.3% since trade filed Sep 17, 2026 | Discretionary sale | 9.1M | $205.26 | $1.9B | +2.3% | Sep 17, 2026 |
| Sep 15, 2026 | Dick Teresa L. (Officer) 5,000 shares $210.00 +0.0% since trade filed Sep 17, 2026 | Discretionary sale | 5,000 | $210.00 | $1.1M | +0.0% | Sep 17, 2026 |
| Sep 15, 2026 | Zmigrosky Matt (Officer) 1,326 shares $212.56 −1.2% since trade filed Sep 17, 2026 | Discretionary sale | 1,326 | $212.56 | $282K | −1.2% | Sep 17, 2026 |
| Sep 11, 2026 | Stice Travis D. (Director) 75K shares $204.31 +2.8% since trade filed Sep 14, 2026 | Discretionary sale | 75K | $204.31 | $15M | +2.8% | Sep 14, 2026 |
| Aug 21, 2026 | Plaumann Mark Lawrence (Director) 1,000 shares $210.58 −0.3% since trade filed Aug 24, 2026 | Discretionary sale | 1,000 | $210.58 | $211K | −0.3% | Aug 24, 2026 |
| Aug 20, 2026 | Van't Hof Matthew Kaes (CEO) 500 shares $215.06 −2.4% since trade filed Aug 24, 2026 | Discretionary sale | 500 | $215.06 | $108K | −2.4% | Aug 24, 2026 |
| Aug 20, 2026 | Van't Hof Matthew Kaes (CEO) 9,500 shares $214.64 −2.2% since trade filed Aug 24, 2026 | Discretionary sale | 9,500 | $214.64 | $2.0M | −2.2% | Aug 24, 2026 |
| Aug 20, 2026 | Wesson Daniel N (COO) 7,500 shares $215.21 −2.4% since trade filed Aug 24, 2026 | Discretionary sale | 7,500 | $215.21 | $1.6M | −2.4% | Aug 24, 2026 |
| Aug 14, 2026 | Zmigrosky Matt (Officer) 2,500 shares $202.77 +3.6% since trade filed Aug 17, 2026 | Discretionary sale | 2,500 | $202.77 | $507K | +3.6% | Aug 17, 2026 |
| Aug 14, 2026 | Thompson Jere W III (CFO) 500 shares $204.14 +2.9% since trade filed Aug 17, 2026 | Discretionary sale | 500 | $204.14 | $102K | +2.9% | Aug 17, 2026 |
| Aug 11, 2026 | Van't Hof Matthew Kaes (CEO) 5,000 shares $202.46 +3.7% since trade filed Aug 12, 2026 | Discretionary sale | 5,000 | $202.46 | $1.0M | +3.7% | Aug 12, 2026 |
| Aug 3, 2026 | Meloy Charles Alvin (Director) 2,730 shares $199.44 +5.3% since trade filed Aug 4, 2026 | Planned sale (10b5-1) | 2,730 | $199.44 | $544K | +5.3% | Aug 4, 2026 |
| Aug 3, 2026 | Meloy Charles Alvin (Director) 3,986 shares $197.06 +6.6% since trade filed Aug 4, 2026 | Planned sale (10b5-1) | 3,986 | $197.06 | $785K | +6.6% | Aug 4, 2026 |
| Aug 3, 2026 | Meloy Charles Alvin (Director) 7,562 shares $197.91 +6.1% since trade filed Aug 4, 2026 | Planned sale (10b5-1) | 7,562 | $197.91 | $1.5M | +6.1% | Aug 4, 2026 |
| Aug 3, 2026 | Meloy Charles Alvin (Director) 19K shares $198.74 +5.7% since trade filed Aug 4, 2026 | Planned sale (10b5-1) | 19K | $198.74 | $3.8M | +5.7% | Aug 4, 2026 |
| Jun 16, 2026 | Meloy Charles Alvin (Director) 4,049 shares $187.68 +11.9% since trade filed Jun 17, 2026 | Planned sale (10b5-1) | 4,049 | $187.68 | $760K | +11.9% | Jun 17, 2026 |
| Jun 16, 2026 | Meloy Charles Alvin (Director) 15K shares $186.37 +12.7% since trade filed Jun 17, 2026 | Planned sale (10b5-1) | 15K | $186.37 | $2.7M | +12.7% | Jun 17, 2026 |
| Jun 16, 2026 | Meloy Charles Alvin (Director) 65K shares $187.25 +12.2% since trade filed Jun 17, 2026 | Planned sale (10b5-1) | 65K | $187.25 | $12M | +12.2% | Jun 17, 2026 |
| Jun 9, 2026 | Plaumann Mark Lawrence (Director) 500 shares $196.50 +6.9% since trade filed Jun 10, 2026 | Discretionary sale | 500 | $196.50 | $98K | +6.9% | Jun 10, 2026 |
| Jun 4, 2026 | Dick Teresa L. (Officer) 5,000 shares $205.00 +2.4% since trade filed Jun 8, 2026 | Discretionary sale | 5,000 | $205.00 | $1.0M | +2.4% | Jun 8, 2026 |
| Jun 4, 2026 | Greth Lyndal (10% owner) 10M shares $204.25 +2.8% since trade filed Jun 5, 2026 | Discretionary sale | 10M | $204.25 | $2.0B | +2.8% | Jun 5, 2026 |
| Jun 3, 2026 | Van't Hof Matthew Kaes (CEO) 5,000 shares $205.00 +2.4% since trade filed Jun 4, 2026 | Discretionary sale | 5,000 | $205.00 | $1.0M | +2.4% | Jun 4, 2026 |
| Jun 3, 2026 | Van't Hof Matthew Kaes (CEO) 10K shares $210.00 +0.0% since trade filed Jun 4, 2026 | Discretionary sale | 10K | $210.00 | $2.1M | +0.0% | Jun 4, 2026 |
| Jun 3, 2026 | Zmigrosky Matt (Officer) 5,000 shares $210.00 +0.0% since trade filed Jun 4, 2026 | Discretionary sale | 5,000 | $210.00 | $1.1M | +0.0% | Jun 4, 2026 |
| Jun 2, 2026 | Dick Teresa L. (Officer) 7,000 shares $200.90 +4.5% since trade filed Jun 2, 2026 | Discretionary sale | 7,000 | $200.90 | $1.4M | +4.5% | Jun 2, 2026 |
| Jun 1, 2026 | Zmigrosky Matt (Officer) 5,000 shares $200.54 +4.7% since trade filed Jun 2, 2026 | Discretionary sale | 5,000 | $200.54 | $1.0M | +4.7% | Jun 2, 2026 |
| May 19, 2026 | Dick Teresa L. (Officer) 5,000 shares $207.00 +1.5% since trade filed May 21, 2026 | Discretionary sale | 5,000 | $207.00 | $1.0M | +1.5% | May 21, 2026 |
| May 15, 2026 | Barkmann Albert (Officer) 3,000 shares $204.04 +2.9% since trade filed May 19, 2026 | Discretionary sale | 3,000 | $204.04 | $612K | +2.9% | May 19, 2026 |
| May 15, 2026 | Thompson Jere W III (CFO) 1,000 shares $203.16 +3.4% since trade filed May 19, 2026 | Discretionary sale | 1,000 | $203.16 | $203K | +3.4% | May 19, 2026 |
| May 14, 2026 | Dick Teresa L. (Officer) 5,000 shares $200.00 +5.0% since trade filed May 14, 2026 | Discretionary sale | 5,000 | $200.00 | $1.0M | +5.0% | May 14, 2026 |
| May 13, 2026 | Zmigrosky Matt (Officer) 5,000 shares $200.10 +5.0% since trade filed May 14, 2026 | Discretionary sale | 5,000 | $200.10 | $1.0M | +5.0% | May 14, 2026 |
| May 8, 2026 | Meloy Charles Alvin (Director) 403 shares $187.54 +12.0% since trade filed May 11, 2026 | Planned sale (10b5-1) | 403 | $187.54 | $76K | +12.0% | May 11, 2026 |
| May 8, 2026 | Meloy Charles Alvin (Director) 3,545 shares $188.72 +11.3% since trade filed May 11, 2026 | Planned sale (10b5-1) | 3,545 | $188.72 | $669K | +11.3% | May 11, 2026 |
| May 8, 2026 | Meloy Charles Alvin (Director) 3,909 shares $189.56 +10.8% since trade filed May 11, 2026 | Planned sale (10b5-1) | 3,909 | $189.56 | $741K | +10.8% | May 11, 2026 |
| May 7, 2026 | Meloy Charles Alvin (Director) 842 shares $187.35 +12.1% since trade filed May 11, 2026 | Planned sale (10b5-1) | 842 | $187.35 | $158K | +12.1% | May 11, 2026 |
| May 7, 2026 | Meloy Charles Alvin (Director) 1,636 shares $188.11 +11.6% since trade filed May 11, 2026 | Planned sale (10b5-1) | 1,636 | $188.11 | $308K | +11.6% | May 11, 2026 |
| May 7, 2026 | Meloy Charles Alvin (Director) 2,492 shares $189.44 +10.9% since trade filed May 11, 2026 | Planned sale (10b5-1) | 2,492 | $189.44 | $472K | +10.9% | May 11, 2026 |
| May 7, 2026 | Meloy Charles Alvin (Director) 2,887 shares $190.14 +10.4% since trade filed May 11, 2026 | Planned sale (10b5-1) | 2,887 | $190.14 | $549K | +10.4% | May 11, 2026 |
| Apr 7, 2026 | Meloy Charles Alvin (Director) 1,254 shares $198.49 +5.8% since trade filed Apr 8, 2026 | Planned sale (10b5-1) | 1,254 | $198.49 | $249K | +5.8% | Apr 8, 2026 |
| Apr 7, 2026 | Meloy Charles Alvin (Director) 1,885 shares $195.55 +7.4% since trade filed Apr 8, 2026 | Planned sale (10b5-1) | 1,885 | $195.55 | $369K | +7.4% | Apr 8, 2026 |
| Apr 7, 2026 | Meloy Charles Alvin (Director) 2,348 shares $197.83 +6.2% since trade filed Apr 8, 2026 | Planned sale (10b5-1) | 2,348 | $197.83 | $465K | +6.2% | Apr 8, 2026 |
| Apr 7, 2026 | Meloy Charles Alvin (Director) 2,370 shares $196.59 +6.8% since trade filed Apr 8, 2026 | Planned sale (10b5-1) | 2,370 | $196.59 | $466K | +6.8% | Apr 8, 2026 |
| Apr 6, 2026 | Meloy Charles Alvin (Director) 185 shares $195.18 +7.6% since trade filed Apr 8, 2026 | Planned sale (10b5-1) | 185 | $195.18 | $36K | +7.6% | Apr 8, 2026 |
| Apr 6, 2026 | Meloy Charles Alvin (Director) 2,316 shares $193.32 +8.6% since trade filed Apr 8, 2026 | Planned sale (10b5-1) | 2,316 | $193.32 | $448K | +8.6% | Apr 8, 2026 |
| Apr 6, 2026 | Meloy Charles Alvin (Director) 5,356 shares $194.15 +8.2% since trade filed Apr 8, 2026 | Planned sale (10b5-1) | 5,356 | $194.15 | $1.0M | +8.2% | Apr 8, 2026 |
| Mar 20, 2026 | Dick Teresa L. (Officer) 5,000 shares $193.00 +8.8% since trade filed Mar 24, 2026 | Discretionary sale | 5,000 | $193.00 | $965K | +8.8% | Mar 24, 2026 |
| Mar 20, 2026 | Wesson Daniel N (COO) 5,000 shares $191.96 +9.4% since trade filed Mar 24, 2026 | Discretionary sale | 5,000 | $191.96 | $960K | +9.4% | Mar 24, 2026 |
| Mar 18, 2026 | WEST STEVEN E (Director) 6,000 shares $188.35 +11.5% since trade filed Mar 19, 2026 | Discretionary sale | 6,000 | $188.35 | $1.1M | +11.5% | Mar 19, 2026 |
| Mar 18, 2026 | Dick Teresa L. (Officer) 5,000 shares $190.00 +10.5% since trade filed Mar 19, 2026 | Discretionary sale | 5,000 | $190.00 | $950K | +10.5% | Mar 19, 2026 |
| Mar 18, 2026 | Zmigrosky Matt (Officer) 4,101 shares $190.51 +10.2% since trade filed Mar 19, 2026 | Discretionary sale | 4,101 | $190.51 | $781K | +10.2% | Mar 19, 2026 |
| Mar 16, 2026 | Thompson Jere W III (CFO) 750 shares $182.47 +15.1% since trade filed Mar 17, 2026 | Discretionary sale | 750 | $182.47 | $137K | +15.1% | Mar 17, 2026 |
| Mar 13, 2026 | Zmigrosky Matt (Officer) 21K shares $180.00 +16.7% since trade filed Mar 17, 2026 | Discretionary sale | 21K | $180.00 | $3.8M | +16.7% | Mar 17, 2026 |
| Mar 13, 2026 | Barkmann Albert (Officer) 4,000 shares $182.90 +14.8% since trade filed Mar 17, 2026 | Discretionary sale | 4,000 | $182.90 | $732K | +14.8% | Mar 17, 2026 |
| Mar 12, 2026 | Greth Lyndal (10% owner) 13M shares $170.19 +23.4% since trade filed Mar 16, 2026 | Discretionary sale | 13M | $170.19 | $2.2B | +23.4% | Mar 16, 2026 |
| Mar 10, 2026 | Meloy Charles Alvin (Director) 566 shares $177.09 +18.6% since trade filed Mar 11, 2026 | Planned sale (10b5-1) | 566 | $177.09 | $100K | +18.6% | Mar 11, 2026 |
| Mar 10, 2026 | Meloy Charles Alvin (Director) 1,075 shares $180.25 +16.5% since trade filed Mar 11, 2026 | Planned sale (10b5-1) | 1,075 | $180.25 | $194K | +16.5% | Mar 11, 2026 |
| Mar 10, 2026 | Meloy Charles Alvin (Director) 1,329 shares $181.15 +15.9% since trade filed Mar 11, 2026 | Planned sale (10b5-1) | 1,329 | $181.15 | $241K | +15.9% | Mar 11, 2026 |
| Mar 10, 2026 | Meloy Charles Alvin (Director) 1,455 shares $182.03 +15.4% since trade filed Mar 11, 2026 | Planned sale (10b5-1) | 1,455 | $182.03 | $265K | +15.4% | Mar 11, 2026 |
| Mar 10, 2026 | Meloy Charles Alvin (Director) 1,686 shares $178.10 +17.9% since trade filed Mar 11, 2026 | Planned sale (10b5-1) | 1,686 | $178.10 | $300K | +17.9% | Mar 11, 2026 |
| Mar 10, 2026 | Meloy Charles Alvin (Director) 1,746 shares $178.82 +17.4% since trade filed Mar 11, 2026 | Planned sale (10b5-1) | 1,746 | $178.82 | $312K | +17.4% | Mar 11, 2026 |
“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles.
Filing hygiene
174 Forms 4, 3 years
0 filed late
0 amendments
1.6 avg. days to file
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.