---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-339070"
form_type: "8-K/A"
ticker: "TNGX"
cik: "0001819133"
company_name: "Tango Therapeutics, Inc."
filed_at: "2026-08-07T10:41:57+00:00"
generated_at: "2026-08-07T10:45:13.525222+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Tango Therapeutics Exec Chair Barbara Weber departs; severance, equity acceleration disclosed

## Summary
- Dr. Barbara Weber stepped down as Executive Chair and board member effective Aug 3, 2026; separation agreement executed Aug 6, 2026.
- Severance: base salary through Dec 31, 2026; COBRA reimbursement to Dec 31, 2026.
- Full acceleration of outstanding options and RSUs, subject to Compensation Committee approval; exercise period extended to Aug 3, 2027 or original expiry.
- Pro-rata 2026 annual incentive compensation paid by Mar 15, 2027, based on company and individual performance.

## SEC filing metadata
- accession: 0001193125-26-339070
- form_type: 8-K/A
- ticker: TNGX
- cik: 0001819133
- company_name: Tango Therapeutics, Inc.
- filed_at: 2026-08-07T10:41:57+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1819133/000119312526339070/0001193125-26-339070-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1819133/000119312526339070/d215768d8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-339070
- JSON: https://secwatch.observer/filing/0001193125-26-339070.json
- Plain text: https://secwatch.observer/filing/0001193125-26-339070.txt

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