Director at Cardio Diagnostics (CDIO) granted stock options

Rhea-AI Filing Summary

Cardio Diagnostics Holdings director Burton Paul Frederick received a grant of stock options as compensation. He was awarded 3,205 options to buy Common Stock at an exercise price of $1.95 per share, expiring on March 31, 2036. Following this grant, he holds 10,464 derivative securities directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Burton Paul Frederick

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Options (Right to Buy)	3,205	$1.95	$6K

Holdings After Transaction: Stock Options (Right to Buy) — 10,464 shares (Direct)

Footnotes (1)

Key Figures

Options granted: 3,205 options Exercise price: $1.95 per share Expiration date: March 31, 2036 +1 more

4 metrics

Options granted 3,205 options Stock Options (Right to Buy) granted to director

Exercise price $1.95 per share Conversion or exercise price for granted options

Expiration date March 31, 2036 Option expiration for this grant

Total derivative holdings 10,464 options Total options held following the transaction

Key Terms

Stock Options (Right to Buy), grant/award acquisition, Common Stock, derivative securities

4 terms

Stock Options (Right to Buy) financial

"security_title: Stock Options (Right to Buy)"

grant/award acquisition financial

"transaction_action: grant/award acquisition"

Common Stock financial

"underlying_security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

derivative securities financial

"derivativeTransactionCount for all derivative-type records"

Financial contracts whose value is tied to the price or performance of another asset, such as a stock, bond, commodity, index, or currency; examples include options, futures and swaps. They matter to investors because they let you protect against price swings, bet on future moves or gain larger exposure with less upfront cash—like using a lever or insurance policy on an investment—so they can amplify gains and losses and help manage portfolio risk.

Form 4 Insider Transactions: What Each Field Means →

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^*

Burton Paul Frederick

(Last) (First) (Middle)

C/O CARDIO DIAGNOSTICS HOLDINGS INC.

311 W. SUPERIOR ST. SUITE 444

(Street)

CHICAGO ILLINOIS 60654

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Cardio Diagnostics Holdings, Inc. [ CDIO ]

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)
03/31/2026

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

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
Stock Options (Right to Buy)	$1.95	03/31/2026		A		3,205		03/31/2026	03/31/2036	Common Stock	3,205	$1.95	10,464	D

Explanation of Responses:

	/s/ Elisa Luqman as attorney-in-fact for Paul Burton	04/02/2026
	** 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)

FAQ

What insider transaction did Cardio Diagnostics (CDIO) report for Burton Paul Frederick?

Cardio Diagnostics reported that director Burton Paul Frederick received a grant of stock options. He was awarded 3,205 derivative securities giving him the right to buy Common Stock, reflecting routine equity-based compensation rather than an open-market purchase or sale.

How many Cardio Diagnostics (CDIO) stock options were granted in this Form 4?

The Form 4 shows a grant of 3,205 stock options. Each option represents the right to buy one share of Cardio Diagnostics Common Stock, increasing the director’s total derivative holdings to 10,464 options after the transaction.

What is the exercise price of the Cardio Diagnostics (CDIO) options granted?

The granted stock options have an exercise price of $1.95 per share. This means the director can acquire Cardio Diagnostics Common Stock at $1.95, regardless of the market price, if he exercises the options before they expire.

When do the newly granted Cardio Diagnostics (CDIO) options expire?

The options granted to the director expire on March 31, 2036. He can choose to exercise the right to buy Common Stock at $1.95 per share any time up to that expiration date, subject to applicable vesting and plan terms.

Did the Cardio Diagnostics (CDIO) Form 4 show any open-market buying or selling?

The Form 4 reflects a grant or award acquisition of stock options, not an open-market trade. The transaction code is “A,” indicating a grant, meaning there was no market purchase or sale of existing Cardio Diagnostics shares in this filing.

How many Cardio Diagnostics (CDIO) derivative securities does the director hold after this grant?

After the grant, the director holds 10,464 derivative securities. These represent total stock options reported as directly owned, giving him the right to acquire an equivalent number of Cardio Diagnostics Common Stock shares according to the plan terms.