Offerings // Westlake Chemical Partners LP

WLKP offering history

Every offering-related filing in Westlake Chemical Partners LP’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 413 filings back to Apr 29, 2014.

Last executed offering

Mar 27, 2019

8-K — priced deal (shares or notes)

Last registration (announced)

Mar 4, 2026

S-3 — capacity, not a sale

Executed, last 12 months

424B pricings + 8-K 3.02 sales

Registered, last 12 months

S-1/S-3/F-series registrations

Date	Filing		What it means
Mar 11, 2026	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 4, 2026	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Mar 20, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 1, 2023	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Apr 16, 2020	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Feb 28, 2020	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Apr 12, 2019	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 29, 2019	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Mar 27, 2019	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Oct 5, 2018	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 28, 2017	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Sep 26, 2017	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Mar 24, 2017	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 10, 2017	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Aug 4, 2014	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Jul 31, 2014	424B1 →	EXECUTED	Prospectus supplement priced — shares or notes (large filers: often a bond deal)
Jul 29, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Jul 29, 2014	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jul 21, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Jul 15, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Jul 9, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Jun 30, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Jun 6, 2014	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Apr 29, 2014	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet

WLKP offering-related filings from SEC EDGAR, newest first (capped at 40). Each links to the original document.

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.

Is a shelf active now? →Do they need money? →Red flags →Full WLKP workspace →

WLKP offering FAQ

When did WLKP last execute an offering?

Per SEC filings, Westlake Chemical Partners LP's most recent priced offering document is a 8-K filed 2019-03-27. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did WLKP last announce or register an offering?

The most recent registration is a S-3 filed 2026-03-04. 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.