David L Lamp
CIK 1275536 · President and CEO · last filed 2025-12-12
David L Lamp is a President and CEO who has filed 58 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing, for CVI, was dated Dec 12, 2025. Across all open-market trades the lifetime net is −$8.7M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.1M across reported positions. 43 SEC filings were submitted jointly with HollyFrontier Corp.
"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.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
HFC price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
2277 PLAZA DRIVE, SUITE 500
SUGAR LAND, TX 77479
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CVI | President and CEO | 17,388 | $61.42 | $1.07M | $0 | 11 | 2025-12-12 |
| Western Refining, Inc. (WNR) Delisted | President and COO | 0 | — | — | $0 | 4 | 2017-06-02 |
| Northern Tier Energy LP (NTI) Delisted | President and CEO | 354,129 | — | — | -$1.87M | 4 | 2016-01-22 |
| HollyFrontier Corp (HFC) Delisted | EVP & COO | 182,004 | $36.39 | $6.62M | -$6.12M | 15 | 2013-12-19 |
| HollyFrontier Corp (HOC) Delisted | President | 82,030 | — | — | -$728.3K | 23 | 2011-05-19 |
Recent Filings
58 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2025-12-12 | CVI | Mixed | — | -$2.05M | EDGAR |
| 2024-12-13 | CVI | Mixed | — | -$1.06M | EDGAR |
| 2023-12-15 | CVI | Mixed | — | -$2.57M | EDGAR |
| 2022-12-16 | CVI | Mixed | — | -$2.59M | EDGAR |
| 2021-12-15 | CVI | Mixed | — | -$212.4K | EDGAR |
| 2021-12-10 | CVI | Mixed | — | -$903.5K | EDGAR |
| 2020-12-16 | CVI | Mixed | — | -$205.5K | EDGAR |
| 2020-12-11 | CVI | Mixed | — | -$168.0K | EDGAR |
| 2019-12-17 | CVI | Mixed | — | -$556.9K | EDGAR |
| 2018-12-18 | CVI | Grant (A) | — | $0 | EDGAR |
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.