---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-174335"
form_type: "8-K"
ticker: "KLRS"
cik: "0001754068"
company_name: "Kalaris Therapeutics, Inc."
filed_at: "2024-07-02T23:59:59+00:00"
generated_at: "2026-05-31T23:48:30.696688+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# AlloVir terminates Waltham lease, pays $7M early termination fee

## Summary
- Terminated lease with BP Bay Colony for 78,541 sq ft at 1100 Winter Street, Waltham, effective June 30, 2024.
- Paid $7M early termination payment due 5 business days after July 1, 2024; no further rent obligations.
- Lease originally scheduled to expire July 31, 2030; Phase II premises (59,305 sq ft) never occupied.
- Surrendered Phase I premises (19,236 sq ft) in condition required by lease; Phase II surrendered early.
- Termination reflects downsizing; company paid $7M to exit long-term lease commitment.

## SEC filing metadata
- accession: 0001193125-24-174335
- form_type: 8-K
- ticker: KLRS
- cik: 0001754068
- company_name: Kalaris Therapeutics, Inc.
- filed_at: 2024-07-02T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1754068/000119312524174335/0001193125-24-174335-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1754068/000119312524174335/d775614d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-174335
- JSON: https://secwatch.observer/filing/0001193125-24-174335.json
- Plain text: https://secwatch.observer/filing/0001193125-24-174335.txt

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