Offerings // Starling Oncology, Inc.

STLN offering history

Every offering-related filing in Starling Oncology, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 545 filings back to Jan 14, 2020.

Last executed offering

Jul 7, 2026

8-K — priced deal (shares or notes)

Last registration (announced)

Jun 16, 2025

S-3/A — 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
Jul 7, 2026	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Aug 13, 2025	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jun 18, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jun 16, 2025	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
Jun 6, 2025	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
May 16, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 8, 2025	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Mar 27, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Mar 25, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Feb 10, 2023	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Feb 10, 2023	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Feb 9, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Feb 9, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jan 9, 2023	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jan 6, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 1, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Dec 1, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Dec 1, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 26, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 26, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Sep 23, 2022	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Sep 22, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 22, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Sep 8, 2022	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Aug 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 10, 2022	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Aug 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Aug 10, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jun 3, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Jun 3, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 19, 2022	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
May 12, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 11, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 9, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 6, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital

STLN 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.

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STLN offering FAQ

When did STLN last execute an offering?

Per SEC filings, Starling Oncology, Inc.'s most recent priced offering document is a 8-K filed 2026-07-07. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did STLN last announce or register an offering?

The most recent registration is a S-3/A filed 2025-06-16. 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.

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