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Corbus Pharmaceuticals (CRBP) grants CMO multi-year options and RSUs

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Corbus Pharmaceuticals Holdings, Inc. granted its Chief Medical Officer, Nicacio Leonardo Viana, new equity awards on August 16, 2026. He received 191,676 stock options to buy common stock at an exercise price of $10.09 per share, expiring on August 16, 2036. Under the company’s 2026 Inducement Award Plan, 25% of this option vests on August 3, 2027, with the remaining 75% vesting in equal monthly installments over 36 months starting September 3, 2027. He was also granted 58,333 restricted stock units (RSUs), settling in common shares, vesting 25% on each of the first four anniversaries beginning August 16, 2027, with specified prorated vesting and forfeiture terms if his service is terminated without cause after the first vesting date.

Positive

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Insider Nicacio Leonardo Viana
Role Chief Medical Officer
Type Security Shares Price Value
Grant/Award Stock options (right to buy) F3 191,676 $0.00 $0.00
Grant/Award Common Stock, par value $0.0001 per share F1, F2 58,333 $0.00 $0.00
Holdings After Transaction: Stock options (right to buy) — 191,676 shares (Direct); Common Stock, par value $0.0001 per share — 58,333 shares (Direct)
Footnotes (3)
  1. F1. On August 16, 2026, the Reporting Person was granted 58,333 restricted stock units ("RSUs"), which will be settled in shares of common stock, par value $0.0001. 25% of the RSUs shall vest on each of the first, second, third and fourth annual anniversary beginning on August 16, 2027. Notwithstanding the foregoing, upon termination of the Reporting Person's Service by the Company without cause, provided that such termination occurs after the first Vesting Date, then a prorata portion of the RSUs shall accelerate in an amount equal to the product of (x) the number of RSUs scheduled to vest on the next Vesting Date and (y) a fraction, the numerator of which is the number of completed months of service the Awardee worked since the most recent Vesting Date through the date of Awardee's termination of Service and the denominator of which is 12. The RSUs, to the extent not accelerated in accordance with this paragraph shall be forfeited upon such Reporting Person's termination of service.
  2. F2. This amount includes 58,333 unvested RSUs granted on August 16, 2026.
  3. F3. This option award was made in accordance with the terms of the issuer's 2026 Inducement Award Plan. 25% of the option vests on August 3, 2027, with the remaining 75% of the option vesting in equal monthly installments over a period of 36 months commencing on September 3, 2027.
Stock options granted 191,676 shares Options to buy common stock granted on August 16, 2026
Option exercise price $10.09 per share Exercise price of 191,676 stock options granted to CMO
Option expiration August 16, 2036 Expiration date of the 191,676 stock options
RSUs granted 58,333 units Restricted stock units granted on August 16, 2026
RSU vesting start August 16, 2027 First 25% of RSUs vest on this date
Initial option vesting date August 3, 2027 25% of stock options vest on this date
Remaining option vesting period 36 months Remaining 75% of options vest monthly from September 3, 2027
restricted stock units ("RSUs") financial
"the Reporting Person was granted 58,333 restricted stock units ("RSUs")"
Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.
Inducement Award Plan financial
"This option award was made in accordance with the terms of the issuer's 2026 Inducement Award Plan"
An inducement award plan is a package of pay, often including stock options or restricted shares, granted to a new employee or executive to attract them to join a company — think of it like a signing bonus paid partly in company stock. Investors care because these awards increase compensation expense and can dilute existing shareholders’ ownership, affecting earnings per share and incentives that shape company strategy.
vest financial
"25% of the RSUs shall vest on each of the first, second, third and fourth annual anniversary"
A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.
prorata portion financial
"then a prorata portion of the RSUs shall accelerate in an amount equal to the product"
exercise price financial
"conversion_or_exercise_price": "10.0900""
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

FAQ

What equity awards did CRBP grant to Chief Medical Officer Nicacio Leonardo Viana on August 16, 2026?

On August 16, 2026, CRBP granted Nicacio Leonardo Viana 191,676 stock options at a $10.09 exercise price and 58,333 RSUs. Both awards vest over multiple years under specified schedules.

What is the vesting schedule for the 191,676 stock options granted by CRBP to the CMO?

The 191,676 stock options vest 25% on August 3, 2027, with the remaining 75% vesting in equal monthly installments over 36 months starting September 3, 2027, under the 2026 Inducement Award Plan.

How do the 58,333 RSUs granted by CRBP to its CMO vest over time?

The 58,333 RSUs vest in four equal installments of 25% each year, beginning on August 16, 2027 and continuing on the second, third, and fourth anniversaries of that date, subject to continued service and certain termination provisions.

What happens to the CRBP RSUs if the CMO is terminated without cause after the first vesting date?

If terminated without cause after the first vesting date, a prorata portion of the next tranche of RSUs accelerates based on completed months of service, while any RSUs not accelerated under this formula are forfeited at termination.

Under which plan were the CRBP stock options granted to Nicacio Leonardo Viana?

The 191,676 stock options were granted under CRBP’s 2026 Inducement Award Plan. The plan provides for vesting of 25% on August 3, 2027, and the remaining 75% in equal monthly installments over 36 months from September 3, 2027.

What is the expiration date of the CRBP stock options granted to the CMO in 2026?

The stock options granted to CRBP’s CMO on August 16, 2026, expire on August 16, 2036. They cover 191,676 shares of common stock at an exercise price of $10.09 per share, subject to the vesting schedule.

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

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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
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. Issuer Name and Ticker or Trading Symbol
Corbus Pharmaceuticals Holdings, Inc. [ CRBP ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Medical Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/16/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock, par value $0.0001 per share08/16/2026A58,333(1)A$058,333(2)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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock options (right to buy)$10.0908/16/2026A191,676 (3)08/16/2036Common Stock191,676$0191,676D
Explanation of Responses:
1. On August 16, 2026, the Reporting Person was granted 58,333 restricted stock units ("RSUs"), which will be settled in shares of common stock, par value $0.0001. 25% of the RSUs shall vest on each of the first, second, third and fourth annual anniversary beginning on August 16, 2027. Notwithstanding the foregoing, upon termination of the Reporting Person's Service by the Company without cause, provided that such termination occurs after the first Vesting Date, then a prorata portion of the RSUs shall accelerate in an amount equal to the product of (x) the number of RSUs scheduled to vest on the next Vesting Date and (y) a fraction, the numerator of which is the number of completed months of service the Awardee worked since the most recent Vesting Date through the date of Awardee's termination of Service and the denominator of which is 12. The RSUs, to the extent not accelerated in accordance with this paragraph shall be forfeited upon such Reporting Person's termination of service.
2. This amount includes 58,333 unvested RSUs granted on August 16, 2026.
3. This option award was made in accordance with the terms of the issuer's 2026 Inducement Award Plan. 25% of the option vests on August 3, 2027, with the remaining 75% of the option vesting in equal monthly installments over a period of 36 months commencing on September 3, 2027.
/s/ Meghan Houghton, attorney-in-fact for Leonardo Nicacio08/17/2026
** Signature of Reporting PersonDate
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)