Comparable stake leader
Capricorn Fund Managers Ltd
SEC ownership of MAXCYTE, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001287098.
Disclosed value leader
Capricorn Fund Managers Ltd
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- MXCT on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Capricorn Fund Managers Ltd
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Capricorn Fund Managers Ltd
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001287098
- Issuer location
- Rockville, MD
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of MAXCYTE, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Capricorn Fund Managers Ltd
Disclosed value leader
Capricorn Fund Managers Ltd
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.7%
13D/G row: Capricorn Fund Managers Ltd
Showing 1-8 of 50 holder rows.
Quick read
Capricorn Fund Managers Ltd leads the comparable SEC ownership view at 7.7%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Capricorn Fund Managers Ltd's linked filing trail.
Comparable ownership
Top 5
Capricorn Fund Managers Ltd
7.7%
BlackRock, Inc.
6.6%
RIVER GLOBAL INVESTORS LLP
5.2%
CADIAN CAPITAL MANAGEMENT, LP
3.5%
Douglas J. Swirsky
0.14%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Capricorn Fund Managers Ltd |
13D/G
13F
Company
|
7.7%
|
$12,710,000
8,200,000 shares
|
$0 | 30 Jan 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
6.6%
|
$10,845,655
6,997,197 shares
|
-$1,951,145 | 31 Dec 2025 |
| RIVER GLOBAL INVESTORS LLP |
13D/G
|
5.2%
|
$8,685,974
5,497,452 shares
|
$0 | 23 Sep 2025 |
| CADIAN CAPITAL MANAGEMENT, LP |
13D/G
13F
Company
|
3.5%
|
$5,708,731
3,683,052 shares
|
-$7,044,054 | 31 Dec 2025 |
| Douglas J. Swirsky |
3/4/5
CHIEF FINANCIAL OFFICER
|
0.14%
|
$123,610
151,669 shares
|
+$56,234 | 17 Mar 2026 |
| Vitruvian Partners LLP |
13F
Company
|
4.8%
|
$3,542,958
5,043,356 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
3.8%
|
$2,799,217
3,981,816 shares
|
— | 31 Mar 2026 |
| MORGAN STANLEY |
13F
Company
|
3.5%
|
$2,590,912
3,688,131 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$471,909.
Buys
$480,175
Insiders: 5
Sells
$8,266
Insiders: 1
Net
+$471,909
Shares: +344,858
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 355,000
Shares: 10,142
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 10,142 | $0 | $8,266 | -$8,266 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 355,000 | 0 | $480,175 | $0 | +$480,175 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to MAXCYTE, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
Casdin Partners Master Fund, L.P.
Net 12M change
+$471,909
Latest report
17 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Casdin Partners Master Fund, L.P. | 10%+ Owner | $45,300,000 | Mixed | 03 Oct 2022 | ||
| Art Mandell | Director | $1,940,066 | Mixed | 11 Jun 2024 | ||
| Douglas Doerfler | President and CEO, Director | $1,509,382 | Mixed | 04 Dec 2023 | ||
| Maher Masoud | President and CEO, Director | $736,250 | +$102,915 | +16% | Mixed | 27 Mar 2026 |
| J. Stark Thompson PhD | Director | $502,459 | Mixed | 09 Aug 2021 | ||
| Stanley C. Erck | Director | $301,196 | +$137,220 | +84% | Mixed | 17 Jun 2026 |
| David I. Sandoval | General Counsel | $204,171 | Filing P/S | 18 Mar 2025 | ||
| Ali Soleymannezhad | Chief Commercial Officer | $188,974 | Filing P/S | 18 Mar 2025 | ||
| DOUGLAS RICHARD | Director | $183,351 | +$111,040 | +154% | Mixed | 17 Jun 2026 |
| John Joseph Johnston | Director | $141,610 | Mixed | 17 Jun 2026 | ||
| Parmeet Ahuja | Chief Financial Officer | $131,812 | Mixed | 15 Apr 2026 | ||
| William W. Brooke | Director | $127,363 | +$64,500 | +103% | Mixed | 17 Jun 2026 |
| Douglas J. Swirsky | Chief Financial Officer | $123,610 | +$56,234 | +83% | Filing P/S | 17 Mar 2026 |
| Thomas M. Ross | Evp, Global Sales | $109,025 | Filing P/S | 01 Aug 2024 | ||
| Cynthia Collins | Director | $78,195 | Mixed | 17 Jun 2026 | ||
| B. al Wakeel | Director | $56,901 | Mixed | 17 Jun 2026 | ||
| Patrick J. Balthrop | Director | $56,901 | Mixed | 17 Jun 2026 | ||
| Rekha Hemrajani | Director | $49,395 | Mixed | 17 Jun 2026 | ||
| Cenk Sumen | Chief Scientific Officer | Mixed | 11 Apr 2022 | |||
| Amanda Louise Murphy | Chief Financial Officer | Mixed | 25 Mar 2022 |
Recent insider transactions for MAXCYTE, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| John Joseph Johnston | MXCT | Common Stock | Award | 17.8% | 30,421 | 201,581 | 17 Jun 2026 | Direct | ||
| John Joseph Johnston | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| Rekha Hemrajani | MXCT | Common Stock | Award | 76.3% | 30,421 | 70,314 | 17 Jun 2026 | Direct | ||
| Rekha Hemrajani | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| Stanley C. Erck | MXCT | Common Stock | Award | 7.64% | 30,421 | 428,749 | 17 Jun 2026 | Direct | ||
| Stanley C. Erck | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| Douglas Richard | MXCT | Common Stock | Award | 13.2% | 30,421 | 260,998 | 17 Jun 2026 | Direct | ||
| Douglas Richard | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| Cynthia Collins | MXCT | Common Stock | Award | 37.6% | 30,421 | 111,310 | 17 Jun 2026 | Direct | ||
| Cynthia Collins | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| William W. Brooke | MXCT | Common Stock | Award | 20.2% | 30,421 | 181,300 | 17 Jun 2026 | Direct | ||
| William W. Brooke | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| Patrick J. Balthrop | MXCT | Common Stock | Award | 60.2% | 30,421 | 80,998 | 17 Jun 2026 | Direct | ||
| Patrick J. Balthrop | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| B. al Wakeel | MXCT | Common Stock | Award | 60.2% | 30,421 | 80,998 | 17 Jun 2026 | Direct | ||
| B. al Wakeel | MXCT | Stock Option (right to buy) | Award | 49,579 | 49,579 | 17 Jun 2026 | Direct | |||
| Parmeet Ahuja | MXCT | Common Stock | Award | 187,500 | 187,500 | 15 Apr 2026 | Direct | |||
| Parmeet Ahuja | MXCT | Employee Stock Option (right to buy) | Award | 375,000 | 375,000 | 30 Mar 2026 | Direct | |||
| Maher Masoud | MXCT | Common Stock | Award | 171.4% | 300,000 | 475,000 | 27 Mar 2026 | Direct | ||
| Maher Masoud | MXCT | Employee Stock Option (right to buy) | Award | 600,000 | 600,000 | 27 Mar 2026 | Direct | |||
| Douglas J. Swirsky | MXCT | Common Stock | Sale | -6.27% | $8,266 | $0.8150 | -10,142 | 151,669 | 17 Mar 2026 | Direct |
| Douglas J. Swirsky | MXCT | Common Stock | Purchase | 44.7% | $64,500 | $1.29 | 50,000 | 161,811 | 13 Aug 2025 | Direct |
| Maher Masoud | MXCT | Common Stock | Purchase | 75% | $102,915 | $1.37 | 75,000 | 175,000 | 13 Aug 2025 | Direct |
| Stanley C. Erck | MXCT | Common Stock | Purchase | 33.5% | $137,220 | $1.37 | 100,000 | 398,328 | 13 Aug 2025 | Direct |
| Douglas Richard | MXCT | Common Stock | Purchase | 53.1% | $111,040 | $1.39 | 80,000 | 230,577 | 13 Aug 2025 | Direct |
| William W. Brooke | MXCT | Common Stock | Purchase | 49.6% | $64,500 | $1.29 | 50,000 | 150,879 | 13 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.