---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-344997"
form_type: "8-K"
ticker: "TNGX"
cik: "0001819133"
company_name: "Tango Therapeutics, Inc."
filed_at: "2026-08-11T21:13:22+00:00"
generated_at: "2026-08-11T21:14:06.825527+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Tango Therapeutics ups ATM equity offering to $400M, replacing $100M program

## Summary
- Filed new prospectus supplement Aug 11, 2026 to sell up to $400M of common stock under ATM sales agreement.
- Prior $100M ATM program terminated; ~$64.39M already sold, ~$35.61M unsold rolled into new offering.
- Sales agreement with Leerink Partners LLC remains in effect for the $400M program.
- No use-of-proceeds specified; likely general corporate purposes.

## SEC filing metadata
- accession: 0001193125-26-344997
- form_type: 8-K
- ticker: TNGX
- cik: 0001819133
- company_name: Tango Therapeutics, Inc.
- filed_at: 2026-08-11T21:13:22+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819133/000119312526344997/0001193125-26-344997-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819133/000119312526344997/d131656d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-344997
- JSON: https://secwatch.observer/filing/0001193125-26-344997.json
- Plain text: https://secwatch.observer/filing/0001193125-26-344997.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.