Offerings // TScan Therapeutics, Inc.

TCRX offering history

Every offering-related filing in TScan Therapeutics, Inc.’s recent SEC record — registrations (announced capacity) kept separate from pricing documents (executed sales). Reviewed 322 filings back to Jul 26, 2019.

Last executed offering

Dec 26, 2024

424B5 — priced deal (shares or notes)

Last registration (announced)

Mar 5, 2025

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 14, 2025	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 5, 2025	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Dec 26, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Nov 21, 2024	8-K →	EXECUTED	Unregistered share sale disclosed (8-K item 3.02)
Apr 18, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 17, 2024	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Apr 16, 2024	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
Apr 12, 2024	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Mar 6, 2024	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
May 30, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 26, 2023	FWP →	MARKETING	Free-writing prospectus — offering being marketed
May 25, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 16, 2023	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
May 16, 2023	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
May 16, 2023	S-3/A →	REGISTERED	S-3/A registration — capacity to sell shares, not a sale yet
May 16, 2023	AW →	WITHDRAWN	Registration withdrawn
May 16, 2023	424B5 →	EXECUTED	Shelf takedown priced — shares or notes (small-caps: usually shares; open the filing to confirm)
May 16, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
May 16, 2023	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Nov 9, 2022	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Nov 9, 2022	S-3 →	REGISTERED	S-3 registration — capacity to sell shares, not a sale yet
Jul 19, 2021	424B4 →	EXECUTED	Final prospectus — offering priced (typical for IPOs and marketed share deals)
Jul 16, 2021	FWP →	MARKETING	Free-writing prospectus — offering being marketed
Jul 15, 2021	S-1MEF →	REGISTERED	S-1MEF registration — capacity to sell shares, not a sale yet
Jul 15, 2021	EFFECT →	EFFECTIVE	SEC declared a registration effective — selling can begin
Jul 12, 2021	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
May 14, 2021	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
May 5, 2021	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Apr 30, 2021	S-1/A →	REGISTERED	S-1/A registration — capacity to sell shares, not a sale yet
Apr 23, 2021	S-1 →	REGISTERED	S-1 registration — capacity to sell shares, not a sale yet

TCRX 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 TCRX workspace →

TCRX offering FAQ

When did TCRX last execute an offering?

Per SEC filings, TScan Therapeutics, Inc.'s most recent priced offering document is a 424B5 filed 2024-12-26. Note a 424B takedown can price shares or notes (debt) — the linked document says which.

When did TCRX last announce or register an offering?

The most recent registration is a S-3 filed 2025-03-05. 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.