---
schema_version: "secwatch.filing_event.v1"
accession: "0001140361-25-036498"
form_type: "8-K"
ticker: "QSI"
cik: "0001816431"
company_name: "Quantum-Si Inc"
filed_at: "2025-09-29T23:59:59+00:00"
generated_at: "2026-05-17T05:25:57.371686+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Quantum-Si enters $100M at-the-market equity offering agreement with Leerink Partners

## Summary
- May offer and sell up to $100M of Class A common stock at its discretion through Leerink Partners as sales agent.
- Sales may be made in at-the-market offerings under Rule 415(a)(4); Company has no obligation to sell any shares.
- Leerink Partners will receive up to 3.0% commission on gross proceeds; Company also reimburses up to $75k in legal expenses.
- Shelf registration statement on Form S-3 filed concurrently on Sept. 26, 2025; effectiveness required before any sales.
- Agreement may be terminated by either party at any time upon written notice.

## SEC filing metadata
- accession: 0001140361-25-036498
- form_type: 8-K
- ticker: QSI
- cik: 0001816431
- company_name: Quantum-Si Inc
- filed_at: 2025-09-29T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1816431/000114036125036498/0001140361-25-036498-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1816431/000114036125036498/ef20056229_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001140361-25-036498
- JSON: https://secwatch.observer/filing/0001140361-25-036498.json
- Plain text: https://secwatch.observer/filing/0001140361-25-036498.txt

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