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Mack John Prosper

Disclosed activity across 1 company

Tapewire entity
23424
SEC CIK
0002031699

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
Orchestra BioMed Holdings, Inc.OBIO · Entity 434DirectorAugust 12, 2026August 14, 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.

Orchestra BioMed Holdings, Inc.

Report date August 12, 2026 · Filed August 14, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common Stock, par value $0.0001 per shareSEC Table I · non-derivativeDirect66,544 Reported balance After 2026-08-12 transaction · row 1
1 source row

Row 1 · 2026-08-12 · Tax withholding · Disposed 4,885 · Balance 66,544

F1: Represents the withholding of shares by the Issuer to satisfy tax withholding obligations in connection with vesting of restricted stock units ("RSUs"). No shares were sold in the market as a result of the vesting of these RSUs and the satisfaction of tax withholding obligations.

Filing footnotes · ownership attribution and instrument terms

F1: Represents the withholding of shares by the Issuer to satisfy tax withholding obligations in connection with vesting of restricted stock units ("RSUs"). No shares were sold in the market as a result of the vesting of these RSUs and the satisfaction of tax withholding obligations.

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
August 12, 2026 Filed Aug 14, 2026 20:15 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 Tax withholdingCommon Stock, par value $0.0001 per share 4,885 $4.42 $21,591.70
Disclosure

SEC source: 0001104659-26-097183 · tm2623285-2_4seq1.xml · nonDerivative · entry 1

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,544

F1 · kind: Represents the withholding of shares by the Issuer to satisfy tax withholding obligations in connection with vesting of restricted stock units ("RSUs"). No shares were sold in the market as a result of the vesting of these RSUs and the satisfaction of tax withholding obligations.

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June 24, 2026 Filed Jun 25, 2026 20:15 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 Tax withholdingCommon Stock 3,510 $0.00 $0.00
Disclosure

SEC source: 0001104659-26-077767 · tm2618965-1_4seq1.xml · nonDerivative · entry 2

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,429

F2 · kind: Represents the withholding of shares by the Issuer to satisfy tax withholding obligations in connection with vesting of RSUs. No shares were sold in the market as a result of the vesting of these RSUs and the satisfaction of tax withholding obligations.

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June 23, 2026 Filed Jun 25, 2026 20:15 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 GrantCommon Stock, par value $0.0001 per share ("Common Stock") 34,653 $0.00 $0.00
Disclosure

SEC source: 0001104659-26-077767 · tm2618965-1_4seq1.xml · nonDerivative · entry 1

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,939

F1 · shares: Represents an award of restricted stock units ("RSUs") awarded to the Reporting Person on June 23, 2026 (the "Grant Date"). Each RSU represents a contingent right to receive one share of Common Stock. The RSUs will vest on the one year anniversary of the Grant Date, subject to the Reporting Person's continuous service through such date.

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August 07, 2025 Filed Aug 8, 2025 23:13 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 GrantCommon Stock, par value $0.0001 per share ("Common Stock") 15,000 $0.00 $0.00
Disclosure

SEC source: 0001104659-25-075785 · tm2523004-6_4seq1.xml · nonDerivative · entry 1

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,286

F1 · shares: Represents an award of restricted stock units ("RSUs") awarded to the Reporting Person on August 7, 2025 (the "Grant Date"). Each RSU represents a contingent right to receive one share of Common Stock. The RSUs will vest on the one year anniversary of the Grant Date, subject to the Reporting Person's continuous service through such date.

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June 24, 2025 Filed Jun 26, 2025 21:19 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 GrantStock Option (Right to Buy) · Derivative 36,797 $0.00 Strike: $3.22 $0.00
Disclosure

SEC source: 0001104659-25-063099 · tm2519252-5_4seq1.xml · derivative · entry 2

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,797

Underlying: Common Stock · 36,797 shares

Expires 2035-06-24

F2 · derivative.exercise_date: The stock options will vest in one installment on the earlier of (x) the one year anniversary of the Grant Date or (y) the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continuous service through such dates.

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June 24, 2025 Filed Jun 26, 2025 21:19 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 GrantCommon Stock, par value $0.0001 per share ("Common Stock") 12,422 $0.00 $0.00
Disclosure

SEC source: 0001104659-25-063099 · tm2519252-5_4seq1.xml · nonDerivative · entry 1

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,286

F1 · shares: Represents an award of restricted stock units ("RSUs") awarded to the Reporting Person on June 24, 2025 (the "Grant Date"). Each RSU represents a contingent right to receive one share of Common Stock. The RSUs will vest in one installment on the earlier of (x) the one year anniversary of the Grant Date or (y) the date of the Issuer's 2026 Annual Meeting of Stockholders, subject to the Reporting Person's continuous service through such dates.

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August 07, 2024 Filed Aug 8, 2024 21:54 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 GrantStock Option (Right to Buy) · Derivative 40,737 $0.00 Strike: $5.83 $0.00
Disclosure

SEC source: 0001104659-24-087387 · tm2421267-1_4seq1.xml · derivative · entry 2

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,737

Underlying: Common Stock · 40,737 shares

Expires 2034-08-07

F2 · derivative.exercise_date: The stock options shall vest as follows: (1) 19,218 stock options shall vest on June 20, 2025 and (2) the remaining 21,519 stock options shall vest in three equal, annual installments beginning on August 7, 2025, subject to the Reporting Person's continuous service through such date.

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August 07, 2024 Filed Aug 8, 2024 21:54 UTC Orchestra BioMed Holdings, Inc. OBIO · Entity 434 GrantCommon Stock, par value $0.0001 per share ("Common Stock") 12,864 $0.00 $0.00
Disclosure

SEC source: 0001104659-24-087387 · tm2421267-1_4seq1.xml · nonDerivative · entry 1

Mack John Prosper · CIK 0002031699 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,864

F1 · shares: Represents an award of restricted stock units ("RSUs") awarded to the Reporting Person on August 7, 2024. Each RSU represents a contingent right to receive one share of Common Stock. The RSUs vest as follows: (1) 6,003 RSUs vest on June 20, 2025 and (2) the remaining 6,861 RSUs vest in three equal, annual installments beginning on August 7, 2025, subject to the Reporting Person's continuous service through such dates.

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