MXCT · Insider Trading
MaxCyte, Inc. Common Stock
Every open-market purchase and sale reported by MXCT officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-22 | Patrick J Balthrop | Director | A | +30,421 | — |
| 2026-06-22 | William W Brooke | Director | A | +30,421 | — |
| 2026-06-22 | John Joseph Johnston | Director | A | +30,421 | — |
| 2026-06-22 | Stanley C Erck | Director | A | +30,421 | — |
| 2026-06-22 | Rekha Hemrajani | Director | A | +30,421 | — |
| 2026-06-22 | Yasir B. Al-Wakeel | Director | A | +30,421 | — |
| 2026-06-22 | Cynthia Collins | Director | A | +30,421 | — |
| 2026-06-22 | Richard Douglas | Director | A | +30,421 | — |
| 2026-04-17 | Parmeet Ahuja | Chief Financial Officer | A | +187,500 | — |
| 2026-04-10 | Parmeet Ahuja | Chief Financial Officer | A | +375,000 deriv. | — |
| 2026-03-19 | Douglas J Swirsky | CHIEF FINANCIAL OFFICER | Sell | −10,142 | −$8.27K |
| 2025-08-27 | Rekha Hemrajani | Director | Sell | −10,684 | −$22.38K |
| 2025-08-13 | Stanley C Erck | Director | Buy | +100,000 | +$137.22K |
| 2025-08-13 | Douglas J Swirsky | CHIEF FINANCIAL OFFICER | Buy | +50,000 | +$64.50K |
| 2025-08-13 | Maher Masoud | President and CEO | Buy | +75,000 | +$102.92K |
| 2025-08-13 | William W Brooke | Director | Buy | +50,000 | +$64.50K |
| 2025-08-13 | Richard Douglas | Director | Buy | +80,000 | +$111.04K |
| 2025-06-23 | Patrick J Balthrop | Director | A | +29,210 | — |
| 2025-06-23 | Richard Douglas | Director | A | +29,210 | — |
| 2025-06-23 | Cynthia Collins | Director | A | +29,210 | — |
| 2025-06-23 | John Joseph Johnston | Director | A | +29,210 | — |
| 2025-06-23 | Yasir B. Al-Wakeel | Director | A | +29,210 | — |
| 2025-06-23 | Rekha Hemrajani | Director | A | +29,210 | — |
| 2025-06-23 | William W Brooke | Director | A | +29,210 | — |
| 2025-06-23 | Stanley C Erck | Director | A | +29,210 | — |
| 2025-03-20 | Ali Soleymannezhad | Chief Commercial Officer | Sell | −1,211 | −$3.85K |
| 2025-03-20 | Douglas J Swirsky | CHIEF FINANCIAL OFFICER | Sell | −6,939 | −$22.06K |
| 2025-03-20 | David I. Sandoval | GENERAL COUNSEL | Sell | −353 | −$1.12K |
| 2025-03-18 | Maher Masoud | President and CEO | A | +347,500 deriv. | — |
| 2025-03-18 | Douglas J Swirsky | CHIEF FINANCIAL OFFICER | A | +37,500 | — |
| 2025-03-18 | Ali Soleymannezhad | Chief Commercial Officer | A | +34,625 | — |
| 2025-03-18 | David I. Sandoval | GENERAL COUNSEL | A | +23,125 | — |
| 2025-01-29 | John Joseph Johnston | Director | MIXED | — | −$5.14K |
| 2025-01-14 | David I. Sandoval | GENERAL COUNSEL | Sell | −4,466 | −$20.27K |
| 2024-12-30 | John Joseph Johnston | Director | MIXED | — | −$3.22K |
| 2024-12-10 | John Joseph Johnston | Director | MIXED | — | −$3.99K |
| 2024-11-05 | Stanley C Erck | Director | MIXED | — | −$175.50K |
| 2024-10-30 | John Joseph Johnston | Director | MIXED | — | −$2.39K |
| 2024-10-16 | Cynthia Collins | Director | A | +51,679 | — |
| 2024-10-02 | Stanley C Erck | Director | MIXED | — | −$176.84K |
| 2024-09-30 | John Joseph Johnston | Director | MIXED | — | −$2.68K |
| 2024-09-18 | Ali Soleymannezhad | Chief Commercial Officer | A | +10,400 | — |
| 2024-09-05 | Stanley C Erck | Director | MIXED | — | −$189.75K |
| 2024-08-28 | John Joseph Johnston | Director | MIXED | — | −$4.06K |
| 2024-08-05 | Thomas M. Ross | EVP, GLOBAL SALES | MIXED | — | −$93.44K |
| 2024-07-30 | John Joseph Johnston | Director | MIXED | — | −$5.46K |
| 2024-07-10 | Thomas M. Ross | EVP, GLOBAL SALES | MIXED | — | −$79.67K |
| 2024-07-01 | John Joseph Johnston | Director | MIXED | — | −$17.12K |
| 2024-06-24 | Thomas M. Ross | EVP, GLOBAL SALES | MIXED | — | −$81.77K |
| 2024-06-13 | Stanley C Erck | Director | A | +21,367 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Stanley C Erck | Director | 428,749 | $647.41K |
| Richard Douglas | Director | 260,998 | $394.11K |
| John Joseph Johnston | Director | 201,581 | $304.39K |
| Parmeet Ahuja | Chief Financial Officer | 187,500 | $283.12K |
| William W Brooke | Director | 181,300 | $273.76K |
| Maher Masoud | President and CEO | 175,000 | $264.25K |
| Douglas J Swirsky | CHIEF FINANCIAL OFFICER | 151,669 | $229.02K |
| Cynthia Collins | Director | 111,310 | $168.08K |
| Patrick J Balthrop | Director | 80,998 | $122.31K |
| Yasir B. Al-Wakeel | Director | 80,998 | $122.31K |
| Rekha Hemrajani | Director | 70,314 | $106.17K |
| David I. Sandoval | GENERAL COUNSEL | 64,219 | $96.97K |
| Ali Soleymannezhad | Chief Commercial Officer | 59,439 | $89.75K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the MXCT quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.