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TNGX 424B5: Secondary offering

Tango Therapeutics

Filed with the SEC on · accession 0001193125-26-344989

TNGX filed a 424B5 (prospectus (offering)) with the SEC on Aug 11, 2026. The final terms of an offering of shares or bonds. The stock moved -4.8% by the first close after the filing.

Summary of the filing

Tango Therapeutics filed a prospectus supplement to offer up to $400 million of common stock in an at-the-market offering through Leerink Partners, replacing a prior $100 million ATM facility under which approximately $64.4 million had been sold.

For details, click here →How to read a 424B5 →

Key details

Maximum aggregate offering price of common stock$400.0M
Prior aggregate offering price$100.0M
Shares sold under prior prospectus supplement$64.4M
Sales agent commission rate$3
IssuerTango Therapeutics, Inc.
Sales agent/underwriterLeerink Partners LLC

How TNGX stock reacted

Close before

$27.67

Aug 10, 2026

First close after

-4.81%

$26.34

5 trading days

-8.60%

$25.29

Since filing

-22.30%

$21.50

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Frequently asked questions

What did TNGX file with the SEC on Aug 11, 2026?

TNGX filed a 424B5 (Secondary offering). Tango Therapeutics filed a prospectus supplement to offer up to $400 million of common stock in an at-the-market offering through Leerink Partners, replacing a prior $100 million ATM facility under which approximately $64.4 million had been sold.

What does a secondary offering mean for TNGX stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a 424B5?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B5 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did TNGX stock react to this filing?

TNGX closed at $27.67 before the filing and $26.34 on Aug 11, 2026 (-4.81%). Five trading days later: $25.29 (-8.60%).

Other TNGX SEC filings

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