13D Filings
MAXCYTE, INC.
MXCT
Initial Filing
Ownership

6.10%

Total Shares

6,529,027

Issuer CIK

1287098

Event Date

May 12, 2026

Accepted

May 14, 2026, 09:44 AM

Reporting Persons (1)
NameType% of ClassAggregateSole VotingShared Voting
RIVER GLOBAL INVESTORS LLP
Investment Company
6.10%6,529,0276,529,0270
Disclosure Items (7)

Security Title

equity

Issuer Name

MAXCYTE, INC.

Issuer Address

9713 KEY WEST AVENUE,, ROCKVILLE, MD, 20850

Filing Persons

River Global Investors LLP

Business Address

30 Coleman Street, London, EC2R 5AL, United Kingdom

Principal Occupation

Investment Firm 30 Coleman Street, London, EC2R 5AL, United Kingdom

Convictions

No

Citizenship

United Kingdom

The Shares were acquired using investment capital of the Funds managed by the Reporting Persons.

(a) The acquisition by any person of additional securities of the issuer, or the disposition of securities of the issuer;

Percentage of Class

6,529,027 shares 6.0950% Ownership

Number of Shares

6,529,027 shares

Transactions

1) River Global Investors LLP 2) 05/13/2026 3) 31,000 shares at 1.115 and 619,000 shares at 1.1142 5) The transactions were effected through brokers in ordinary open-market transactions.

Shareholders

Not applicable.

Date of 5% Ownership

Not applicable.

Not applicable.

Not applicable.