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person · Reporting owner

Sandoval David I.

Disclosed activity across 2 companies

Tapewire entity
56590
SEC CIK
0002012430

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
MAXCYTE, INC.MXCT · Entity 6608GENERAL COUNSELMarch 18, 2025March 20, 2025
Milestone Pharmaceuticals Inc.MIST · Entity 6561GC & Chief Compliance OfficerMarch 17, 2026March 23, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

MAXCYTE, INC.

Report date March 18, 2025 · Filed March 20, 2025

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect64,219 Reported balance After 2025-03-18 transaction · row 1
1 source row

Row 1 · 2025-03-18 · Sale · Disposed 353 · Balance 64,219

F1: These shares were sold to cover tax withholding due upon vesting of previously granted restricted stock units ("RSUs"). Such "sale to cover" was automatically effected to satisfy tax withholding obligations and does not represent a discretionary trade by the Reporting Person.

F2: The price reported in Column 4 is a weighted average price of all shares sold on the transaction date by the Issuer's broker to cover taxes upon the vesting of RSUs for certain employees of the Issuer, including the Reporting Person. These shares were sold in multiple transactions at prices ranging from $3.14 to $3.215, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Filing footnotes · ownership attribution and instrument terms

F1: These shares were sold to cover tax withholding due upon vesting of previously granted restricted stock units ("RSUs"). Such "sale to cover" was automatically effected to satisfy tax withholding obligations and does not represent a discretionary trade by the Reporting Person.

F2: The price reported in Column 4 is a weighted average price of all shares sold on the transaction date by the Issuer's broker to cover taxes upon the vesting of RSUs for certain employees of the Issuer, including the Reporting Person. These shares were sold in multiple transactions at prices ranging from $3.14 to $3.215, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Milestone Pharmaceuticals Inc.

Report date March 17, 2026 · Filed March 23, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Employee Stock Option (right to buy)SEC Table II · derivative / convertible security · Conversion / exercise price $1.96 · Expires 2036-01-19DirectNot disclosed Reported balance Holding disclosure · report date 2026-03-17 · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · Balance Not disclosed

F1: One-fourth (1/4th) of the shares subject to the option vest on January 19, 2027, and one thirty-sixth (1/36th) of the remaining shares subject to this option shall vest each month thereafter, subject to the Reporting Person continuing to provide service through each such date.

Filing footnotes · ownership attribution and instrument terms

F1: One-fourth (1/4th) of the shares subject to the option vest on January 19, 2027, and one thirty-sixth (1/36th) of the remaining shares subject to this option shall vest each month thereafter, subject to the Reporting Person continuing to provide service through each such date.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
March 18, 2025 Filed Mar 20, 2025 18:47 UTC MAXCYTE, INC. MXCT · Entity 6608 SaleCommon Stock 353 $3.18 $1,122.29
Disclosure

SEC source: 0000905148-25-000985 · form4.xml · nonDerivative · entry 1

Sandoval David I. · CIK 0002012430 · GENERAL COUNSEL

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,219

F1 · kind: These shares were sold to cover tax withholding due upon vesting of previously granted restricted stock units ("RSUs"). Such "sale to cover" was automatically effected to satisfy tax withholding obligations and does not represent a discretionary trade by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price of all shares sold on the transaction date by the Issuer's broker to cover taxes upon the vesting of RSUs for certain employees of the Issuer, including the Reporting Person. These shares were sold in multiple transactions at prices ranging from $3.14 to $3.215, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

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March 14, 2025 Filed Mar 18, 2025 20:49 UTC MAXCYTE, INC. MXCT · Entity 6608 GrantEmployee Stock Option (right to buy) · Derivative 92,500 $0.00 Strike: $3.29 $0.00
Disclosure

SEC source: 0000905148-25-000963 · form4.xml · derivative · entry 2

Sandoval David I. · CIK 0002012430 · GENERAL COUNSEL

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,500

Underlying: Common Stock · 92,500 shares

Expires 2035-03-13

F2 · derivative.exercise_date: Twenty-five percent (25%) of the shares underlying this option shall vest on March 14, 2026, 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.

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March 14, 2025 Filed Mar 18, 2025 20:49 UTC MAXCYTE, INC. MXCT · Entity 6608 GrantCommon Stock 23,125 $0.00 $0.00
Disclosure

SEC source: 0000905148-25-000963 · form4.xml · nonDerivative · entry 1

Sandoval David I. · CIK 0002012430 · GENERAL COUNSEL

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,572

F1 · shares: 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 14, 2026, 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.

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January 13, 2025 Filed Jan 14, 2025 16:03 UTC MAXCYTE, INC. MXCT · Entity 6608 SaleCommon Stock 4,466 $4.54 $20,271.62
Disclosure

SEC source: 0000905148-25-000092 · form4.xml · nonDerivative · entry 1

Sandoval David I. · CIK 0002012430 · GENERAL COUNSEL

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,447

F1 · kind: These shares were sold to cover tax withholding due upon vesting of previously granted restricted stock units. Such "sale to cover" was automatically effected to satisfy tax withholding obligations and does not represent a discretionary trade by the Reporting Person.

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March 15, 2024 Filed Mar 19, 2024 18:20 UTC MAXCYTE, INC. MXCT · Entity 6608 GrantEmployee Stock Option (right to buy) · Derivative 15,625 $0.00 Strike: $4.31 $0.00
Disclosure

SEC source: 0001415889-24-008638 · form4-03192024_100311.xml · derivative · entry 2

Sandoval David I. · CIK 0002012430 · GENERAL COUNSEL

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,625

Underlying: Common Stock · 15,625 shares

Expires 2034-03-14

F2 · derivative.exercise_date: Twenty-five percent (25%) of the shares underlying this option shall vest on March 15, 2025, 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.

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March 15, 2024 Filed Mar 19, 2024 18:20 UTC MAXCYTE, INC. MXCT · Entity 6608 GrantCommon Stock 3,913 $0.00 $0.00
Disclosure

SEC source: 0001415889-24-008638 · form4-03192024_100311.xml · nonDerivative · entry 1

Sandoval David I. · CIK 0002012430 · GENERAL COUNSEL

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,913

F1 · shares: 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 15, 2025, 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.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.