Reporting owner · CIK 0001948454

Lyon Shawn M

Visual SEC Form 4 history across 2 companies, 10 transactions and 4 filings.

SL, MGLSVP Log & Storage, MPLX GP LLCMarathon Petroleum Corp
Open-market mix
Latest filingSep 01, 2026, 08:40 PM
Filings4Form 4 records
Buying$00 purchases
Selling$1.4M3 sales
Net value−$1.4MBuys minus sells
Companies22 securities
Most recentAug 31, 2026sale

Open-market buy performance

90-day forward return on this insider's open-market purchases

90d forward
Forward return is not available yet

We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for this insider's their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.

Monthly open-market activity

Reported purchase and sale transaction counts

Buys Sells
530-3-5Mar 253Aug 26

Net value flow

Buys minus sells

Mar 25
$0
Aug 26
−$1.4M

Transaction texture

Ownership and ticket size

Average P/S size$469.1K
Median P/S size$375.8K
Direct10
Indirect0
Aug 31, 2026sale

Filing-only signals

Deterministic matches in this insider's history

Cluster Sellingpattern2Direct Ownershipfiling-context10Large Holdings Increaseholdings1Repeat Sellerpattern2

Latest Form 4 facts

Quick context from source filings

Latest transaction

sale at Marathon Petroleum Corp on Aug 31, 2026 valued at $375,750.

Review SEC filing
Latest buy

No open-market insider purchase is available.

Latest sale

sale at Marathon Petroleum Corp on Aug 31, 2026 valued at $375,750.

Review SEC filing

Associated companies

Visual map of known reporting history

MPCMarathon Petroleum Corp7 transactions · latest Sep 01, 2026, 08:40 PMMPLXMPLX LP3 transactions · latest Mar 04, 2025, 11:57 PM
TickerInsiderRoleTypeSharesValueCodeSignals90d returnFiledTrans date
MPCLyon Shawn M
SLMGL
sale1.00k-$37.5MS
Cluster Selling Direct Ownership Repeat Seller
0.0%09/0108/31
MPCLyon Shawn M
SLMGL
sale425-$15.6MS
Cluster Selling Direct Ownership Repeat Seller
0.0%09/0108/28
MPCLyon Shawn M
SLMGL
sale2.50k-$87.5MS
Direct Ownership
+6.9%08/1708/13
MPCLyon Shawn M
SLMGL
withholding240-$3.56MF
Direct Ownership
—03/05/202503/03/2025
MPCLyon Shawn M
SLMGL
withholding189-$2.80MF
Direct Ownership
—03/05/202503/03/2025
MPCLyon Shawn M
SLMGL
withholding480-$7.13MF
Direct Ownership
—03/05/202503/03/2025
MPCLyon Shawn M
SLMGL
grant2.09k$0A
Direct Ownership
—03/05/202503/01/2025
MPLXLyon Shawn M
SVLOG
withholding1.05k-$5.71MF
Direct Ownership
—03/04/202503/03/2025
MPLXLyon Shawn M
SVLOG
withholding936-$5.08MF
Direct Ownership
—03/04/202503/03/2025
MPLXLyon Shawn M
SVLOG
grant6.01k$0A
Direct Ownership Large Holdings Increase
—03/04/202503/01/2025

Lyon Shawn M Insider Activity FAQ

SEC Form 4 context

Who is Lyon Shawn M?

Lyon Shawn M is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001948454.

Which companies has Lyon Shawn M reported transactions for?

Marathon Petroleum Corp, MPLX LP

When was Lyon Shawn M's latest insider buy?

No open-market insider purchase is available for this period.

When was Lyon Shawn M's latest insider sale?

sale at Marathon Petroleum Corp on Aug 31, 2026 valued at $375,750.

Where can I see the original SEC filings?

Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.

Are performance metrics included?

This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.