Offerings // BioAtla, Inc.

BCAB offering history

Every offering-related filing in BioAtla, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 499 filings back to Oct 6, 2020.

Last executed offering

Mar 20, 2026

424B2 — priced deal (shares or notes)

Last registration (announced)

Jan 16, 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 20, 2026	424B2 →	EXECUTED	Prospectus supplement priced — shares or notes (large filers: often a bond deal)
Mar 13, 2026	424B2 →	EXECUTED	Prospectus supplement priced — shares or notes (large filers: often a bond deal)
Mar 9, 2026	424B2 →	EXECUTED	Prospectus supplement priced — shares or notes (large filers: often a bond deal)
Jan 16, 2026	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jan 12, 2026	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Dec 31, 2025	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Nov 21, 2025	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 16, 2025	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
May 14, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 6, 2025	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Dec 20, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 17, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jan 6, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Jan 6, 2023	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Nov 7, 2022	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 18, 2022	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 1, 2022	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Feb 4, 2022	S-3ASR →	REGISTERED	Automatic shelf registration — effective immediately (large filers)
Nov 3, 2021	424B3 →	UPDATE	Prospectus update — often a resale registration, not necessarily new capital
Nov 3, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Oct 22, 2021	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet
Sep 29, 2021	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Dec 17, 2020	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Dec 15, 2020	S-1MEF →	REGISTERED	S-1MEF registration — capacity to sell shares, not a sale yet
Dec 15, 2020	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Dec 9, 2020	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Dec 8, 2020	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Nov 13, 2020	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet

BCAB 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 BCAB workspace →

BCAB offering FAQ

When did BCAB last execute an offering?

Per SEC filings, BioAtla, Inc.'s most recent priced offering document is a 424B2 filed 2026-03-20. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did BCAB last announce or register an offering?

The most recent registration is a S-3 filed 2026-01-16. 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.