[SCHEDULE 13G] Y-mAbs Therapeutics, Inc. SEC Filing

Rhea-AI Filing Summary

Beryl Capital Management and related reporting persons disclosed ownership of 4,087,091 shares of Y-mAbs Therapeutics common stock, representing 9.0% of the outstanding class based on 45,438,420 shares reported by the issuer for the quarter ended June 30, 2025. The Partnership affiliate is separately reported with 3,095,833 shares (6.8%). All reported shares are shown with shared voting and shared dispositive power; none are reported as sole voting or sole dispositive power. The filing includes a certification that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Positive

• Reported beneficial ownership of 4,087,091 shares (9.0% of class)
• Certification states shares were acquired and are held in the ordinary course of business, not to influence control

Negative

• No sole voting or dispositive power reported; all power is shared
• Concentration in a single reporting group equals a material 9.0% stake, requiring disclosure and potential monitoring by investors

Insights

Financial Analyst

TL;DR: Beryl and affiliates report a material passive stake of 9.0% in Y-mAbs; holdings are shared, not sole-control.

The Schedule 13G discloses a material position: 4,087,091 shares equal to 9.0% of the class using the issuer's stated outstanding share count. The report classifies the position as passive under Rule 13d-1, and the filers state the securities are held in the ordinary course and not to influence control. For investors, this is a notable ownership disclosure but, per the filing, does not signal an active control campaign or immediate governance changes.

Corporate Governance Expert

TL;DR: A single investor group and its control person hold shared voting rights on 9.0%—material but filed as non-control.

The filing identifies Beryl Capital entities and David A. Witkin as reporting persons with shared voting and dispositive power over the same 4,087,091 shares. The Partnership's separate 3,095,833-share holding (6.8%) is also disclosed. The certification language explicitly denies an intent to change or influence issuer control, which is consistent with a passive disclosure rather than an active governance engagement.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Y-mAbs Therapeutics, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

984241109

(CUSIP Number)

08/05/2025

(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)

SCHEDULE 13G

CUSIP No. 984241109

1

Names of Reporting Persons

Beryl Capital Management LLC

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 4,087,091.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,087,091.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,087,091.00

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)

9.0 %

12

Type of Reporting Person (See Instructions)

IA, OO

Comment for Type of Reporting Person: Percentage calculated based on 45,438,420 shares of Common Stock outstanding on August 4, 2025, as disclosed in the Form 10-Q filed by the Issuer for the quarter ended June 30, 2025.

SCHEDULE 13G

CUSIP No. 984241109

1

Names of Reporting Persons

Beryl Capital Management 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 4,087,091.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,087,091.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,087,091.00

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)

9.0 %

12

Type of Reporting Person (See Instructions)

IA, PN

Comment for Type of Reporting Person: Percentage calculated based on 45,438,420 shares of Common Stock outstanding on August 4, 2025, as disclosed in the Form 10-Q filed by the Issuer for the quarter ended June 30, 2025.

SCHEDULE 13G

CUSIP No. 984241109

1

Names of Reporting Persons

Beryl Capital Partners II 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 3,095,833.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,095,833.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,095,833.00

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)

6.8 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: Percentage calculated based on 45,438,420 shares of Common Stock outstanding on August 4, 2025, as disclosed in the Form 10-Q filed by the Issuer for the quarter ended June 30, 2025.

SCHEDULE 13G

CUSIP No. 984241109

1

Names of Reporting Persons

David A. Witkin

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

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,087,091.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,087,091.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,087,091.00

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)

9.0 %

12

Type of Reporting Person (See Instructions)

HC, IN

Comment for Type of Reporting Person: Percentage calculated based on 45,438,420 shares of Common Stock outstanding on August 4, 2025, as disclosed in the Form 10-Q filed by the Issuer for the quarter ended June 30, 2025.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Y-mAbs Therapeutics, Inc.
(b)	Address of issuer's principal executive offices: 202 Carnegie Center, Suite 301, Princeton, NJ 08540
Item 2.
(a)	Name of person filing: Beryl Capital Management LLC, a Delaware limited liability company ("Beryl") Beryl Capital Management LP, a Delaware limited partnership ("Beryl GP") Beryl Capital Partners II LP, a Delaware limited partnership (the "Partnership") David A. Witkin Each reporting person disclaims beneficial ownership of Common Stock except to the extent of that person's pecuniary interest therein. In addition, the filing of this Schedule 13G on behalf of the Partnership should not be construed as an admission that it is, and it disclaims that it is, a beneficial owner, as defined in Rule 13d-3 under the Act, of any Common Stock covered by this Schedule 13G.
(b)	Address or principal business office or, if none, residence: 225 Avenue I, Suite 205 Redondo Beach, CA 90277
(c)	Citizenship: See Item 4 of the cover sheet for each reporting person.
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 984241109
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: Beryl: 4,087,091 Beryl GP: 4,087,091 Partnership: 3,095,833 David A Witkin: 4,087,091
(b)	Percent of class: Beryl: 9.0% Beryl GP: 9.0% Partnership: 6.8% David A. Witkin: 9.0%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Beryl: 0 Beryl GP: 0 Partnership: 0 David A. Witkin: 0
	(ii) Shared power to vote or to direct the vote: Beryl: 4,087,091 Beryl GP: 4,087,091 Partnership: 3,095,833 David A Witkin: 4,087,091
	(iii) Sole power to dispose or to direct the disposition of: Beryl: 0 Beryl GP: 0 Partnership: 0 David A. Witkin: 0
	(iv) Shared power to dispose or to direct the disposition of: Beryl: 4,087,091 Beryl GP: 4,087,091 Partnership: 3,095,833 David A Witkin: 4,087,091
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
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.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Beryl is the investment adviser to the Partnership and other accounts. Beryl is the general partner of Beryl GP, which is the general partner of the Partnership and other private investment funds. Mr. Witkin is the control person of Beryl.
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. By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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.

Beryl Capital Management LLC

Signature:	/s/ Andrew Nelson
Name/Title:	Chief Operating Officer
Date:	08/12/2025

Beryl Capital Management LP

Signature:	/s/ Andrew Nelson
Name/Title:	Chief Operating Officer of Beryl Capital Management LLC, General Partner of Beryl Capital Management LP
Date:	08/12/2025

Beryl Capital Partners II LP

Signature:	/s/ Andrew Nelson
Name/Title:	COO of Beryl Capital Management LLC, General Partner of Beryl Capital Management LP, General Partner of Beryl Capital Partners II LP
Date:	08/12/2025

David A. Witkin

Signature:	/s/ David A. Witkin
Name/Title:	Reporting person
Date:	08/12/2025

Comments accompanying signature: EX. 99.1 - AGREEMENT REGARDING JOINT FILING OF STATEMENT ON SCHEDULE 13D OR 13G

FAQ

How many Y-mAbs (YMAB) shares does Beryl report owning?

The filing reports 4,087,091 shares beneficially owned by Beryl and related reporting persons.

What percentage of YMAB does the 4,087,091 shares represent?

The reported shares represent 9.0% of the outstanding common stock, based on 45,438,420 shares outstanding.

Does Beryl claim sole voting or dispositive power over these YMAB shares?

No. The filing reports 0 sole voting power and 4,087,091 shared voting power, and similarly for dispositive power.

Does the filing indicate Beryl intends to change or influence control of YMAB?

The certification in the filing states the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

What is the Partnership's separately reported ownership in YMAB?

Beryl Capital Partners II LP is reported with 3,095,833 shares, equal to 6.8% of the class.