MPLX offering history
Every offering-related filing in MPLX LP’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 1,003 filings back to Nov 16, 2016.
| Date | Filing | What it means | |
|---|---|---|---|
| Aug 10, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 10, 2026 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| May 6, 2026 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Feb 6, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Feb 5, 2026 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Feb 5, 2026 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Aug 8, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 7, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 7, 2025 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Mar 4, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 3, 2025 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 3, 2025 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| May 17, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 15, 2024 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| May 15, 2024 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| May 15, 2023 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Feb 6, 2023 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Feb 3, 2023 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Feb 2, 2023 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 10, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 8, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 8, 2022 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Mar 14, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 10, 2022 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Mar 10, 2022 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Aug 27, 2020 | S-3ASR → | REGISTERED | Automatic shelf registration — effective immediately (large filers) |
| Aug 13, 2020 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 11, 2020 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Aug 11, 2020 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Apr 20, 2020 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Apr 20, 2020 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| Sep 6, 2019 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 4, 2019 | 424B5 → | EXECUTED | Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm) |
| Sep 4, 2019 | FWP → | MARKETING | Free-writing prospectus — offering being marketed |
| Aug 1, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Jun 28, 2019 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Jun 28, 2019 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
| May 8, 2019 | 8-K → | EXECUTED | Unregistered share sale disclosed (8-K item 3.02) |
| Mar 20, 2019 | 424B3 → | UPDATE | Prospectus update — often a resale registration, not necessarily new capital |
| Mar 18, 2019 | EFFECT → | EFFECTIVE | SEC declared a registration effective — selling can begin |
Two honest limits. (1) A 424B takedown can price shares or notes— EDGAR’s metadata doesn’t say which, so open the document: large investment-grade filers use these mostly for bond deals (no dilution), small-caps mostly for shares. (2) At-the-market (ATM) programs sell shares gradually and individual sales are not separately filed — the visible footprint is the enabling shelf and its 424B5; actual ATM share counts surface later in the 10-Q/10-K share count. Educational information from public filings, not investment advice.
MPLX offering FAQ
When did MPLX last execute an offering?
Per SEC filings, MPLX LP's most recent priced offering document is a 424B5 filed 2026-08-10. Note a 424B takedown can price shares or notes (debt) — the linked document says which.
When did MPLX last announce or register an offering?
The most recent registration is a S-3ASR filed 2026-05-06. A registration is capacity to sell shares — not a sale.
Does an offering always mean dilution?
Registered direct offerings and shelf takedowns issue new shares and dilute existing holders. Resale registrations (424B3/B7) let existing holders sell and do not create new shares. Secondary sales by insiders also do not dilute. Each row here is labeled with what it is.