---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-22-153071"
form_type: "8-K"
ticker: "ENTA"
cik: "0001177648"
company_name: "ENANTA PHARMACEUTICALS INC"
filed_at: "2022-05-17T23:59:59+00:00"
generated_at: "2026-06-25T11:19:01.859450+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Enanta signs 10-year lease for ~73k sq ft HQ expansion in Watertown, MA; amends existing leases

## Summary
- New lease with ARE-MA Region No. 75 for ~73,000 sq ft at Arsenal on the Charles; 10-year term starting June 2024.
- Aggregate minimum lease payments under new lease: ~$76.5M; base rent ~$0.6M/month with 3% annual escalations.
- Tenant improvement allowance of ~$15.0M; one-time extension option for additional 5 years at market rate.
- Second Amendment shortens 500 Arsenal St lease to ~June 2024; aggregate remaining payments ~$6.5M.
- First Amendment at 400 Talcott Ave adds ~20,000 sq ft office space; lease extended to June 2034; aggregate payments ~$19.4M.

## SEC filing metadata
- accession: 0001193125-22-153071
- form_type: 8-K
- ticker: ENTA
- cik: 0001177648
- company_name: ENANTA PHARMACEUTICALS INC
- filed_at: 2022-05-17T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1177648/000119312522153071/0001193125-22-153071-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1177648/000119312522153071/d349963d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-22-153071
- JSON: https://secwatch.observer/filing/0001193125-22-153071.json
- Plain text: https://secwatch.observer/filing/0001193125-22-153071.txt

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