Maher Masoud - 27 Mar 2026 Form 4 Insider Report for MAXCYTE, INC. (MXCT)

Reporting relationship: President and CEO, Director
Issuer ticker: MXCT
Reported as of: 27 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 31 Mar 2026, 16:12:11 UTC
Prior SEC filing: 13 Aug 2025
Source filing: View source filing
Reporting owner signature: /s/ Maher Masoud

Key filing fact

Maher Masoud filed Form 4 for MAXCYTE, INC. (MXCT) on 31 Mar 2026.

Key facts

This page summarizes Maher Masoud's Form 4 filing for MAXCYTE, INC. (MXCT).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 31 Mar 2026, 16:12.

Change

Previous filing in this sequence was filed on 13 Aug 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001874571 Primary reporting owner

Masoud Maher

Relationship: President and CEO, Director
Address: C/O MAXCYTE, INC., 9713 KEY WEST AVENUE, SUITE 400, ROCKVILLE
Signature: /s/ Maher Masoud
Signature date: 31 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MXCT transaction

Common Stock

Award

Transaction value
Shares: +300,000
Change %: +171%
Price: $0.000000^*
Shares after: 475,000
Date: 27 Mar 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MXCT transaction Derivative

Employee Stock Option (right to buy)

Award

Transaction value
Shares: +600,000
Change %
Price: $0.000000^*
Shares after: 600,000
Date: 27 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 600,000
Exercise price: $0.6840
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

These shares represent restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's Common Stock. Twenty-five percent (25%) of the RSUs shall vest on March 27, 2027, and the remainder shall vest in three (3) equal annual installments thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date.

Footnote F2

Twenty-five percent (25%) of the shares underlying this option shall vest on March 27, 2027, and the remainder shall vest in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date.