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Corbus Pharmaceuticals Holdings, Inc. Schedule 13G/A Amendment No. 2 reports that Octagon Capital Advisors LP, Octagon Investments Master Fund LP and Ting Jia jointly report 0 shares beneficially owned, representing 0.0% of Common Stock based on 17,736,464 Common Shares outstanding as of March 23, 2026. The filing states Octagon is the Master Fund's investment manager and Dr. Jia is Octagon's managing member; the Master Fund holds any Common Shares for the benefit of its investors. Signatures are dated May 14, 2026.
Key Figures
Shares beneficially owned:0 sharesPercent of class:0.0%Shares outstanding used:17,736,464 shares+1 more
4 metrics
Shares beneficially owned0 sharesAmount reported in Item 4(a)
Percent of class0.0%Percent reported in Item 4(b)
Shares outstanding used17,736,464 sharesOutstanding as of <date>March 23, 2026</date>
Filing signatures datedMay 14, 2026Signature dates on the amendment
Key Terms
Schedule 13G/A, beneficially owned, dispositive power
3 terms
Schedule 13G/Aregulatory
"Schedule 13G/A Amendment No. 2 appears at top of the excerpt"
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
beneficially ownedfinancial
"Item 4(a) states "Amount beneficially owned: 0""
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
dispositive powerregulatory
"Item 4 lists "Sole power to dispose" and "Shared power to dispose" as 0"
Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What does the CRBP Schedule 13G/A Amendment No. 2 report?
It reports that Octagon Capital Advisors, Octagon Investments Master Fund and Ting Jia jointly report 0 shares beneficially owned, equal to 0.0% of Common Stock based on 17,736,464 shares outstanding as of March 23, 2026.
Who are the reporting persons in the CRBP filing?
The filing lists Octagon Capital Advisors LP, Octagon Investments Master Fund LP and Ting Jia as joint reporting persons. Octagon is the Master Fund's investment manager and Dr. Jia is Octagon's managing member.
Does the filing show Octagon or Dr. Jia control any CRBP shares?
No. The filing discloses 0 sole or shared voting power and 0 sole or shared dispositive power with respect to Common Shares, and thus reports no beneficial ownership position in the issuer.
What outstanding share count does the CRBP filing use to calculate percentage?
The percentage is calculated using 17,736,464 Common Shares outstanding as of March 23, 2026, a figure cited from the issuer's Form DEF 14A filed April 2, 2026 and used to compute the 0.0% ownership.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 2)
Corbus Pharmaceuticals Holdings, Inc.
(Name of Issuer)
Common Stock, $0.0001 par value
(Title of Class of Securities)
21833P301
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
21833P301
1
Names of Reporting Persons
Octagon Capital Advisors LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.0 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
21833P301
1
Names of Reporting Persons
Octagon Investments Master Fund LP
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CAYMAN ISLANDS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.0 %
12
Type of Reporting Person (See Instructions)
PN, OO
SCHEDULE 13G
CUSIP Number(s):
21833P301
1
Names of Reporting Persons
Ting Jia
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CHINA
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
0.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.0 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Corbus Pharmaceuticals Holdings, Inc.
(b)
Address of issuer's principal executive offices:
500 River Ridge Drive, Norwood, MA, 02062
Item 2.
(a)
Name of person filing:
This statement is being jointly filed by:
Octagon Capital Advisors LP ("Octagon")
Octagon Investments Master Fund LP ("Master Fund")
Ting Jia, as the principal beneficial owner of Octagon ("Dr. Jia")
Each of the foregoing is referred to as a "Reporting Person" and collectively as the "Reporting Persons."
Octagon serves as the investment manager of the Master Fund. Dr. Jia is the managing member of Octagon. By virtue of these relationships each of Octagon and Dr. Jia may be deemed to beneficially own the Issuer's Common Shares directly owned by the Master Fund.
(b)
Address or principal business office or, if none, residence:
The address of the business office of each of the Reporting Persons is 654 Madison Avenue, 21st Floor, New York, NY 10065.
(c)
Citizenship:
Octagon is a Delaware limited partnership. The Master Fund is an exempted limited partnership established in the Cayman Islands. Dr. Jia is a Chinese citizen.
(d)
Title of class of securities:
Common Stock, $0.0001 par value
(e)
CUSIP No.:
21833P301
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
0
(b)
Percent of class:
0.0 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
0
The percentage reported on this Schedule 13G is calculated based upon 17,736,464 Common Shares outstanding as of March 23, 2026, as reported in the Form DEF 14A filed by the Issuer on April 2, 2026.
Item 5.
Ownership of 5 Percent or Less of a Class.
Ownership of 5 percent or less of a class
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
Octagon is the investment advisor to the Master Fund and other accounts. Dr. Jia is the control person of Octagon. The Master Fund holds the Common Shares for the benefit of its investors. The Master Fund and Octagon, for the benefit of its investors, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Common Shares.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Octagon Capital Advisors LP
Signature:
/s/ Ting Jia
Name/Title:
Managing Member
Date:
05/14/2026
Octagon Investments Master Fund LP
Signature:
/s/ Ting Jia
Name/Title:
Managing Member, Octagon Investments GP, LLC, its general partner
