---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-338480"
form_type: "8-K"
ticker: "TNGX"
cik: "0001819133"
company_name: "Tango Therapeutics, Inc."
filed_at: "2026-08-06T21:30:33+00:00"
generated_at: "2026-08-06T21:32:06.785153+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Tango Therapeutics Executive Chair Barbara Weber departs effective August 3, 2026

## Summary
- Dr. Weber's employment ended Aug 3, 2026; she resigned from all officer and board positions.
- Resignation not due to any disagreement with the Company's operations, practices or policies.
- Severance includes base salary through Dec 31, 2026, COBRA reimbursement, and 12-month vesting acceleration.
- Vested stock option exercise period extended to Aug 3, 2027; pro-rata 2026 annual incentive offered.
- Benefits contingent on execution of a Separation Agreement; no successor named.

## SEC filing metadata
- accession: 0001193125-26-338480
- form_type: 8-K
- ticker: TNGX
- cik: 0001819133
- company_name: Tango Therapeutics, Inc.
- filed_at: 2026-08-06T21:30:33+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819133/000119312526338480/0001193125-26-338480-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819133/000119312526338480/d41277d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-338480
- JSON: https://secwatch.observer/filing/0001193125-26-338480.json
- Plain text: https://secwatch.observer/filing/0001193125-26-338480.txt

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