# EDGAR Filing Document

**Accession Number:** 0001816431
**File Stem:** 0001816431-26-000023
**Filing Date:** 2026-4
**Character Count:** 2155
**Document Hash:** 16b283aae6dcf9fd12a42fb1d6e99005
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001816431-26-000023.hdr.sgml**: 20260401

**ACCESSION NUMBER**: 0001816431-26-000023

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 11

**FILED AS OF DATE**: 20260401

**DATE AS OF CHANGE**: 20260401

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Quantum-Si Inc
- **CENTRAL INDEX KEY:** 0001816431
- **STANDARD INDUSTRIAL CLASSIFICATION:** MEASURING & CONTROLLING DEVICES, NEC [3829]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 851388175
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39486
- **FILM NUMBER:** 26828213

**BUSINESS ADDRESS:**
- **STREET 1:** 29 BUSINESS PARK DRIVE
- **CITY:** BRANFORD
- **STATE:** CT
- **ZIP:** 06405
- **BUSINESS PHONE:** (203) 458-7100

**MAIL ADDRESS:**
- **STREET 1:** 29 BUSINESS PARK DRIVE
- **CITY:** BRANFORD
- **STATE:** CT
- **ZIP:** 06405

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** HighCape Capital Acquisition Corp.
- **DATE OF NAME CHANGE:** 20200629

?xml version='1.0' encoding='ASCII'? qsi-20260330

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

**SCHEDULE 14A** 

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Filed by the Registrant ⌧

Filed by a Party other than the Registrant □

Check the appropriate box:

□ Preliminary Proxy Statement

□ **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**

□ Definitive Proxy Statement

⌧ Definitive Additional Materials

□ Soliciting Material Under §240.14a-12

**Quantum-Si Incorporated** 

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

⌧ No fee required

□ Fee paid previously with preliminary materials

□ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

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![Notice Image 1.jpg](qsi-20260330_g1.jpg)

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![Notice Image 2.jpg](qsi-20260330_g2.jpg)