CorMedix CFO uses 8,424 shares for tax obligations

Rhea-AI Filing Summary

CorMedix Inc. (CRMD) reported that Susan Blum, Chief Financial Officer, had 8,424 shares of Common Stock disposed of on 2026-08-29 in a transaction coded "F," described as payment of exercise price or tax liability by delivering or withholding securities. Following this transaction, Blum directly owned 124,315 Common Stock shares.

Insider Trade Summary

Net Seller: 8,424 shares

Net Sell 1 txn

Insider Blum Susan

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	8,424	$8.30	$70K

Holdings After Transaction: Common Stock — 124,315 shares (Direct)

Key Figures

Shares disposed: 8,424 shares of Common Stock Transaction price per share: $8.30 per share Shares owned after transaction: 124,315 shares of Common Stock

3 metrics

Shares disposed 8,424 shares of Common Stock Code F transaction on 2026-08-29 for payment of exercise price or tax liability

Transaction price per share $8.30 per share Reference price for the 8,424 shares in the code F disposition

Shares owned after transaction 124,315 shares of Common Stock Direct holdings of Susan Blum following the 2026-08-29 transaction

Key Terms

Form 4, Payment of exercise price or tax liability by delivering or withholding securities, direct or indirect ownership

3 terms

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.

Payment of exercise price or tax liability by delivering or withholding securities financial

"transaction_code_description: "Payment of exercise price or tax liability by de..."

direct or indirect ownership financial

"direct_or_indirect uses D/I for Direct/Indirect ownership type"

FAQ

What insider transaction did CorMedix Inc. (CRMD) disclose for Susan Blum?

CorMedix Inc. disclosed that CFO Susan Blum had 8,424 Common Stock shares disposed of on 2026-08-29 in a code "F" transaction for payment of exercise price or tax liability by delivering or withholding securities.

How many CorMedix (CRMD) shares does Susan Blum hold after this Form 4 transaction?

After the reported transaction, CFO Susan Blum directly owned 124,315 shares of CorMedix Inc. Common Stock. This figure reflects her holdings following the 8,424-share disposition related to payment of exercise price or tax liability.

What was the price per share in Susan Blum’s CorMedix (CRMD) Form 4 transaction?

The reported transaction for CFO Susan Blum used a reference price of $8.30 per share for the 8,424 CorMedix Common Stock shares involved in the code "F" disposition related to payment of exercise price or tax liability.

Was Susan Blum’s CorMedix (CRMD) transaction a market sale or a tax/exercise-related disposition?

The transaction was coded "F", described as payment of exercise price or tax liability by delivering or withholding securities, indicating it was tax or exercise-price related rather than a standard open-market purchase or sale.

Does the CorMedix (CRMD) Form 4 indicate a Rule 10b5-1 trading plan for Susan Blum?

The document-level Rule 10b5-1 checkbox is false, indicating the transactions were not affirmed as being made pursuant to a Rule 10b5-1 trading plan based on this disclosure.

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

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Available on EDGAR 09/01/2026 - 08:20 PM Accepted by SEC EDGAR 09/01/2026 - 08:20 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^*

Blum Susan

(Last) (First) (Middle)

C/O CORMEDIX INC.

389 INTERPACE PKWY, SUITE 450

(Street)

PARSIPPANY NEW JERSEY 07054

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
CorMedix Inc. [ CRMD ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/29/2026

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	08/29/2026		F		8,424	D	$8.3	124,315	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:

	/s/ Beth Zelnick Kaufman, attorney-in-fact	09/01/2026
	** 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)