# EDGAR Filing Document

**Accession Number:** 0001287098
**File Stem:** 0001486180-25-000006
**Filing Date:** 2025-10
**Character Count:** 5625
**Document Hash:** 48d3224d44327167f88d0975666a61bb
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001486180-25-000006.hdr.sgml**: 20251024

**ACCESSION NUMBER**: 0001486180-25-000006

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251024

**DATE AS OF CHANGE**: 20251024

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MAXCYTE, INC.
- **CENTRAL INDEX KEY:** 0001287098
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH [8731]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 522210438
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92738
- **FILM NUMBER:** 251415204

**BUSINESS ADDRESS:**
- **STREET 1:** 9713 KEY WEST AVENUE,
- **STREET 2:** SUITE 400
- **CITY:** ROCKVILLE
- **STATE:** MD
- **ZIP:** 20850
- **BUSINESS PHONE:** 301-517-5556

**MAIL ADDRESS:**
- **STREET 1:** 9713 KEY WEST AVENUE,
- **STREET 2:** SUITE 400
- **CITY:** ROCKVILLE
- **STATE:** MD
- **ZIP:** 20850

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MAXCYTE INC
- **DATE OF NAME CHANGE:** 20040415
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** RIVER GLOBAL INVESTORS LLP
- **CENTRAL INDEX KEY:** 0001486180

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** X0
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**BUSINESS ADDRESS:**
- **STREET 1:** 30 COLEMAN STREET
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** EC2R 5AL
- **BUSINESS PHONE:** 44 20 3327 5100

**MAIL ADDRESS:**
- **STREET 1:** 30 COLEMAN STREET
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** EC2R 5AL

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** RIVER & MERCANTILE ASSET MANAGEMENT LLP
- **DATE OF NAME CHANGE:** 20130404

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** River & Mercantile Asset Management LLP
- **DATE OF NAME CHANGE:** 20100303

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**MAXCYTE, INC.**

*(Name of Issuer)*

**equity**

*(Title of Class of Securities)*

**57777K106**

*(CUSIP Number)*

**nusayhah ghaboos**<br>30 Coleman street<br>london X0 EC2R 5AL<br>02033275025

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**09/23/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **57777K106** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**RIVER GLOBAL INVESTORS LLP** | Name of reporting person<br>**RIVER GLOBAL INVESTORS LLP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**SC** | Source of funds (See Instructions)<br>**SC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X0** | Citizenship or place of organization<br>**X0** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**5497452.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**5497452.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**5497452.00** | Aggregate amount beneficially owned by each reporting person<br>**5497452.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**5.2%** | Percent of class represented by amount in Row (11)<br>**5.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IV** | Type of Reporting Person (See Instructions)<br>**IV** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
equity

**(b) Name of Issuer:**
MAXCYTE, INC.

**(c) Address of Issuer's Principal Executive Offices:**
9713 KEY WEST AVENUE,, SUITE 400, ROCKVILLE, MD, 20850

**Item 4. Purpose of Transaction**

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

**Item 5. Interest in Securities of the Issuer**

**(a)**
5,497,452
5.1568%

**(b)**
5,497,452 Shares

**(c)**
1) River Global Investors LLP
2) Transaction date - 23/09/2025
3) 252,702
4) 20,848 shares priced at USD1.7357 | 143,999 Shares priced at USD1.7390 | 87,755 shares priced at USD 1.5486
5) Conducted on Bloomberg AIM, purchase transaction

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

N/A

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** RIVER GLOBAL INVESTORS LLP

**Signature:** Nusayhah Ghaboos

**Name/Title:** Operational Compliance Associate

**Date:** 10/24/2025