STOCK TITAN

Corbus director sells 2,000 shares in planned trade

CRBP director Ben Yong reported a small, pre-planned sale of 2,000 shares, retaining 9,383 shares including unvested RSUs.

(Neutral)
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Form Type
4

Rhea-AI Filing Summary

Corbus Pharmaceuticals Holdings, Inc. (CRBP) director Ben Yong sold 2,000 shares of common stock on September 14, 2026 in an open-market transaction at a weighted average price of $7.84 per share, under a Rule 10b5-1 trading plan adopted on June 12, 2026. Following the sale, he held 9,383 shares in total, including 3,800 unvested RSUs subject to vesting schedules.

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Insider Ben Yong
Role Director
Sold 2,000 shs ($16K)
Type Security Shares Price Value
Sale Common Stock, par value $0.0001 per share F1, F2, F3 2,000 $7.8415 $16K
Holdings After Transaction: Common Stock, par value $0.0001 per share — 9,383 shares (Direct)
Footnotes (3)
  1. F1. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 12, 2026.
  2. F2. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.80 to $7.90. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
  3. F3. This amount includes 3,800 unvested RSUs subject to each grant's vesting schedule as previously reported.
Shares sold 2,000 shares Common stock sale reported for September 14, 2026
Weighted average sale price $7.84 per share Sale prices ranged from $7.80 to $7.90
Approximate transaction value $15,683 2,000 shares sold at $7.84 weighted average price
Shares owned after transaction 9,383 shares Total beneficial ownership following the September 14, 2026 sale
Unvested RSUs included in holdings 3,800 RSUs Unvested restricted stock units included in post-transaction total
Rule 10b5-1 trading plan regulatory
"This transaction was effected pursuant to a Rule 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported in column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
RSUs financial
"This amount includes 3,800 unvested RSUs subject to each grant's vesting schedule"
RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.
unvested RSUs financial
"This amount includes 3,800 unvested RSUs subject to each grant's vesting schedule"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did CRBP director Ben Yong report on this Form 4?

Ben Yong reported a sale of 2,000 shares of Corbus Pharmaceuticals common stock on September 14, 2026, classified as an open-market or private sale of non-derivative common stock.

At what price did Ben Yong sell Corbus Pharmaceuticals (CRBP) shares?

The 2,000 CRBP shares were sold at a weighted average price of $7.84 per share, with individual trade prices ranging from $7.80 to $7.90, as disclosed in the filing footnote.

How many Corbus Pharmaceuticals (CRBP) shares does Ben Yong own after this sale?

After the sale, Ben Yong beneficially owned 9,383 shares of Corbus Pharmaceuticals common stock, which the filing states includes 3,800 unvested RSUs that remain subject to their respective vesting schedules.

Was the CRBP insider sale by Ben Yong made under a Rule 10b5-1 trading plan?

Yes. The filing states the transaction was effected pursuant to a Rule 10b5-1 trading plan that Ben Yong adopted on June 12, 2026, indicating the trade was pre-arranged under that plan.

How large is Ben Yong’s reported CRBP sale in dollar terms?

Using the disclosed weighted average price of $7.84 per share and 2,000 shares sold, the transaction size is approximately $15,683 in total value.

What portion of Ben Yong’s CRBP holdings are unvested RSUs?

Out of Ben Yong’s total 9,383 shares reported after the transaction, 3,800 are unvested RSUs, which remain subject to each grant’s vesting schedule as previously reported.

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).
X
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*
Ben Yong

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/14/2026
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 share09/14/2026S(1)2,000D$7.8415(2)9,383(3)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
Explanation of Responses:
1. This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 12, 2026.
2. The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.80 to $7.90. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. This amount includes 3,800 unvested RSUs subject to each grant's vesting schedule as previously reported.
/s/ Meghan Houghton, attorney-in-fact for Yong Ben09/15/2026
** 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)

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