Corbus Pharma (CRBP) Chief Medical Officer files Form 3 insider report

Rhea-AI Filing Summary

Corbus Pharmaceuticals Holdings, Inc. filed an insider ownership report on Form 3 for Nicacio Leonardo Viana, who serves as Chief Medical Officer. The filing identifies him as a company officer but reports no stock transactions or derivative positions and includes no holdings entries for him.

Key Terms

Form 3, reporting person, Chief Medical Officer

3 terms

Form 3 regulatory

"Insider ownership report on Form 3 for Nicacio Leonardo Viana."

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

reporting person regulatory

"Names Nicacio Leonardo Viana as a reporting person for Corbus Pharmaceuticals."

Chief Medical Officer other

"Lists his officer title as Chief Medical Officer at the issuer."

A chief medical officer is a senior executive responsible for overseeing the health and medical strategies within an organization, often in the healthcare or pharmaceutical sectors. They play a key role in guiding decisions related to medical research, product safety, and healthcare policies, which can impact a company's reputation and success. For investors, understanding the chief medical officer's role helps gauge how well a company manages medical risks and advances its healthcare goals.

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

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FAQ

What does Corbus Pharmaceuticals (CRBP) Form 3 report for Nicacio Leonardo Viana?

The Form 3 names Nicacio Leonardo Viana, Chief Medical Officer of Corbus Pharmaceuticals, as a reporting person. It provides his officer role but shows no insider stock transactions or derivative positions reported for him in this filing.

Does the CRBP Form 3 show any insider stock buying or selling by Nicacio Leonardo Viana?

No. The Form 3 for Nicacio Leonardo Viana reports no buy or sell transactions. Transaction counts for purchases, sales, gifts, exercises, and other dealings are all shown as zero in the summarized data.

What position does Nicacio Leonardo Viana hold at Corbus Pharmaceuticals (CRBP)?

Nicacio Leonardo Viana is listed as an officer of Corbus Pharmaceuticals, with the title Chief Medical Officer. This role makes him a reporting person whose holdings and transactions must be disclosed on SEC insider ownership forms.

Are any derivative securities reported for Nicacio Leonardo Viana in CRBP’s Form 3?

No derivative securities are reported. The derivativeSummary is empty and the filing shows no derivative transactions or positions for Nicacio Leonardo Viana, indicating no options or similar instruments are listed in this report.

Why is Nicacio Leonardo Viana classified as a reporting person for CRBP?

Nicacio Leonardo Viana is classified as a reporting person because he is an officer of Corbus Pharmaceuticals, serving as Chief Medical Officer. Officers must report their ownership and certain activity in the company’s securities to the SEC.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Nicacio Leonardo Viana

(Last) (First) (Middle)

C/O CORBUS PHARMACEUTICALS HOLDINGS, INC

500 RIVER RIDGE DRIVE

(Street)

NORWOOD MASSACHUSETTS 02062

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
08/03/2026

3. Issuer Name and Ticker or Trading Symbol
Corbus Pharmaceuticals Holdings, Inc. [ CRBP ]

3a. Foreign Trading Symbol

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

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

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

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

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

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

No securities are beneficially owned.

	/s/ Meghan Houghton, attorney-in-fact for Leonardo Nicacio	08/04/2026
	** 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 5 (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 3: SEC 1473 (03-26)