Garry L. Peiffer

CIK 1521094 · Executive VP (See Remarks) · last filed 2026-05-19

"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.

Loading insider history…
Disclosed Exposure

$16.88M

Companies

2

Total Filings

113

Lifetime Open-Market Net

$1.58M

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
MPLX Director 136,119 $56.87 $7.74M $1.58M 101 2026-05-19
MPC Executive VP (See Remarks) 34,691 $263.58 $9.14M $0 12 2014-01-06

Recent Filings · Page 3 of 12

113 filings
Form 4 transactions across all companies, newest first.
Filed Symbol Action Net Shares Net $ Link
2023-08-16 MPLX Grant (A) +993 $0 EDGAR
2023-07-05 MPLX Grant (A) +808 $0 EDGAR
2023-05-17 MPLX Grant (A) +982 $0 EDGAR
2023-04-05 MPLX Grant (A) +790 $0 EDGAR
2023-02-16 MPLX Grant (A) +923 $0 EDGAR
2023-01-05 MPLX Grant (A) +844 $0 EDGAR
2022-11-23 MPLX Grant (A) +902 $0 EDGAR
2022-10-05 MPLX Grant (A) +905 $0 EDGAR
2022-08-16 MPLX Grant (A) +821 $0 EDGAR
2022-07-05 MPLX Grant (A) +927 $0 EDGAR
Showing 2130 of 113
Page 3 of 12
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.