What changed in this filing

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Item 5. Market for Registrant’s Common Equity

2026-03-13 compared with 2025-03-20 · 28 added, 24 removed, 8 unchanged (87% of the section changed)

Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities

Market for Registrant’s Common Equity, Related Shareholder Matters and Issuer Purchases

of Equity Securities

Market Information

Our publicly traded Common Stock and warrants are currently

listed on the Nasdaq Capital Market under the symbols “CDIO” and “CDIOW,” respectively.

As of March 20,

2025, there were 42 holders of record of our common stock and six holders of record of our Public Warrants and Sponsor Warrants.

we have approximately 74 holders of private placement warrants, the majority of which have been registered for resale on a registration

statement on Form S-1 that the SEC declared effective on January 24, 2023.

The number of record

holders of our Common Stock and Public Warrants was determined from the records of our transfer agent and does not include beneficial

owners of any of our securities whose securities are held in the names of various security brokers, dealers, and registered clearing agencies.

The transfer agent

for our common stock and warrant agent for our warrants is Continental Stock Transfer & Trust Company.

We have not declared

or paid any cash dividends on our common stock.

Our publicly traded Common Stock and warrants are

currently listed on the Nasdaq Capital Market under the symbols “CDIO” and “CDIOW,” respectively.

As of March 13, 2026, there were 39 holders of

record of our common stock and six holders of record of our Public Warrants and Sponsor Warrants.

In addition, we have approximately

74 holders of private placement warrants, the majority of which have been registered for resale on a registration statement on Form S-1

that the SEC declared effective on January 24, 2023.

The number of record holders of our Common Stock

and Public Warrants was determined from the records of our transfer agent and does not include beneficial owners of any of our securities

whose securities are held in the names of various security brokers, dealers, and registered clearing agencies.

The transfer agent for our common stock and warrant

agent for our warrants is Continental Stock Transfer & Trust Company.

We have not declared or paid any cash dividends

on our Common Stock.

To date we have utilized all available cash to finance our operations.

Payment of cash

dividends in the future will be at the discretion of our Board of Directors and will depend upon our earnings levels, capital requirements,

any restrictive loan covenants and other factors the Board considers relevant.

As of March 20,

2025, there were 8,528,766 warrants outstanding for the purchase of Company Common Stock.

Payment of cash dividends in the future will

be at the discretion of our Board of Directors and will depend upon our earnings levels, capital requirements, any restrictive loan covenants

and other factors the Board considers relevant.

As of March 13, 2026, there were 284,292 (8,528,766

prior to the Reverse Stock Split) warrants outstanding for the purchase of Company Common Stock.

Refer to Note 9 to the consolidated financial

statements included in this Annual Report on Form 10-K for additional information relating to outstanding warrants.

Authorized for Issuance Under Equity Compensation Plans

Securities Authorized for Issuance Under Equity

Compensation Plans

See Part III, Item 11, “Executive Compensation,”

1 unchanged sentence

Sales of Unregistered Securities

We did not sell any equity securities

that were not registered under the Securities Act during the fiscal year ended December 31, 2024 that were not otherwise disclosed in

our Quarterly Reports on Form 10-Q or our Current Reports on Form 8-K.

We did not sell any equity securities that were

not registered under the Securities Act during the fiscal year ended December 31, 2025 that were not otherwise disclosed in our Quarterly

Reports on Form 10-Q or our Current Reports on Form 8-K.

Issuer Purchases of Equity Securities

currently have any plans under which the Company is able to repurchase shares of our equity securities from our stockholders.

We do not currently have any plans under which the

Company is able to repurchase shares of our equity securities from our stockholders.

Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.

What changed 10-K

Item 5. Market for Registrant’s Common Equity