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Shawn M Lyon

CIK 1948454 · SVP Log & Storage, MPLX GP LLC · last filed 2026-08-17

Shawn M Lyon is a SVP Log & Storage, MPLX GP LLC who has filed 25 SEC Form 4 insider transactions across 2 companies since 2022. The most recent filing, for MPC, was dated Aug 31, 2026. Across all open-market trades the lifetime net is −$3.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.6M across reported positions.

"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

$7.63M

Companies

2

Total Filings

25

Lifetime Open-Market Net

-$3.32M

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
MPC SVP Log & Storage, MPLX GP LLC 15,557 $383.00 $5.96M -$3.53M 13 2026-08-17
MPLX Senior VP, Log. & Storage 28,289 $59.09 $1.67M $211.0K 8 2026-03-03

Recent Filings

25 filings
Insider 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
2026-08-31 MPC Notice (144) −1,000 -$375.7K EDGAR
2026-08-28 MPC Notice (144) −425 -$156.6K EDGAR
2026-08-20 MPC Notice (144) −2,500 -$875.0K EDGAR
2026-08-17 MPC Sell (S) −2,500 -$875.0K EDGAR
2026-03-13 MPC Gift (G) −1,186 $0 EDGAR
2026-03-03 MPLX Mixed +3,235 -$162.9K EDGAR
2026-03-03 MPC Mixed +957 -$159.5K EDGAR
2025-12-16 MPLX Tax (F) −245 -$13.4K EDGAR
2025-12-16 MPC Tax (F) −86 -$16.0K EDGAR
2025-03-11 MPLX Buy (P) +4,000 $211.0K EDGAR
Showing 1–10 of 25
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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.