Orchestra BioMed director reports RSU tax withholding

Orchestra BioMed Holdings, Inc. director John Prosper Mack reported a Form 4 transaction where 4,885 shares of common stock were withheld by the company at $4.42 per share to satisfy tax withholding obligations upon vesting of restricted stock units.

Rhea-AI Filing Summary

Orchestra BioMed Holdings, Inc. director John Prosper Mack reported a Form 4 transaction where 4,885 shares of common stock were withheld by the company at $4.42 per share to satisfy tax withholding obligations upon vesting of restricted stock units. According to the company, no shares were sold in the market, and Mack’s directly held stake after the withholding is 66,544 shares.

Insider Trade Summary

Tax Withholding: 4,885 shares

Tax Withholding 1 txn

Insider Mack John Prosper

Role Director

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock, par value $0.0001 per share F1	4,885	$4.42	$22K

Holdings After Transaction: Common Stock, par value $0.0001 per share — 66,544 shares (Direct)

Footnotes (1)

1. 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.

Key Figures

Shares withheld for tax: 4,885 shares Withholding price: $4.42 per share Shares held after transaction: 66,544 shares

3 metrics

Shares withheld for tax 4,885 shares Withheld to satisfy tax withholding obligations on RSU vesting

Withholding price $4.42 per share Value applied to shares withheld for tax obligations

Shares held after transaction 66,544 shares Director’s direct common stock holdings following the withholding

Key Terms

restricted stock units, withholding of shares, tax withholding obligations, Form 4

4 terms

restricted stock units financial

"in connection with vesting of restricted stock units ("RSUs")."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

withholding of shares financial

"Represents the withholding of shares by the Issuer to satisfy tax"

tax withholding obligations financial

"shares by the Issuer to satisfy tax withholding obligations in connection"

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did OBIO director John Prosper Mack report?

John Prosper Mack reported a Form 4 transaction where 4,885 shares of Orchestra BioMed common stock were withheld by the issuer at $4.42 per share to cover tax withholding obligations tied to vesting RSUs.

Were any OBIO shares sold in the market in this Form 4 transaction?

No, the company states that no shares were sold in the market. The 4,885 shares were withheld by Orchestra BioMed solely to satisfy tax withholding obligations related to the vesting of restricted stock units.

How many OBIO shares does John Prosper Mack hold after this transaction?

After the tax-withholding transaction, John Prosper Mack directly holds 66,544 shares of Orchestra BioMed common stock. This figure reflects his position following the withholding of 4,885 shares for tax obligations on vested RSUs.

What was the price used for the OBIO tax-withholding shares?

The tax-withholding disposition used a price of $4.42 per share for the 4,885 shares withheld. This value determines the amount applied toward satisfying Mack’s tax withholding obligations on the vesting restricted stock units.

What does transaction code F mean in the OBIO Form 4 filing?

Transaction code F indicates a payment of tax liability by delivering or withholding securities. In this case, 4,885 shares of Orchestra BioMed common stock were withheld to cover taxes from the vesting of restricted stock units, with no market sale involved.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/14/2026 - 04:23 PM Accepted by SEC EDGAR 08/14/2026 - 04:15 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Mack John Prosper

(Last) (First) (Middle)

C/O ORCHESTRA BIOMED HOLDINGS, INC.

150 UNION SQUARE DRIVE

(Street)

NEW HOPE PENNSYLVANIA 18938

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Orchestra BioMed Holdings, Inc. [ OBIO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/12/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.0001 per share	08/12/2026		F(1)		4,885	D	$4.42	66,544	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

	/s/ Andrew Taylor, Attorney-in-Fact	08/14/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)