Vestal Point Capital and Ryan Wilder have filed a Schedule 13G reporting beneficial ownership of 2,925,000 shares of Arcellx, Inc. common stock, representing 5.1% of the company’s outstanding shares.
The stake is held through the Vestal Point fund and a managed account, which have the right to receive dividends and sale proceeds. The ownership percentage is based on 57,822,871 Arcellx shares outstanding as of October 31, 2025. The filers certify the investment was made in the ordinary course of business and not for the purpose of influencing control of Arcellx.
Positive
None.
Negative
None.
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Arcellx, Inc.
(Name of Issuer)
Common Stock, par value $0.001 per share
(Title of Class of Securities)
03940C100
(CUSIP Number)
12/31/2025
(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.
03940C100
1
Names of Reporting Persons
Vestal Point Capital, 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
2,925,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,925,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,925,000.00
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)
5.1 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP No.
03940C100
1
Names of Reporting Persons
Ryan Wilder
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
2,925,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
2,925,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
2,925,000.00
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)
5.1 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Arcellx, Inc.
(b)
Address of issuer's principal executive offices:
800 Bridge Parkway, Redwood City, California 94065.
Item 2.
(a)
Name of person filing:
This statement is filed by:
(i) Vestal Point Capital, LP (the "Investment Manager"), a Delaware limited partnership, and the investment adviser to a certain fund and a managed account (the "Vestal Point Fund and Account"), with respect to the shares of common stock, par value $0.001 per share (the "Common Stock"), of Arcellx, Inc. (the "Company") directly held by the Vestal Point Fund and Account; and
(ii) Mr. Ryan Wilder ("Mr. Wilder"), the Chief Investment Officer and Managing Partner of the Investment Manager and the Managing Member of Vestal Point Capital, LLC, the general partner of the Investment Manager, with respect to the shares of Common Stock directly held by the Vestal Point Fund and Account.
The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons."
The filing of this statement should not be construed as an admission that any of the foregoing persons or any Reporting Person is, for the purposes of Section 13 of the Securities Exchange Act of 1934, the beneficial owner of the securities reported herein.
(b)
Address or principal business office or, if none, residence:
The address of the business office of each of the Reporting Persons is 632 Broadway, Suite 602, New York, NY 10012.
(c)
Citizenship:
The Investment Manager is a Delaware limited partnership. Mr. Wilder is a citizen of the United States.
(d)
Title of class of securities:
Common Stock, par value $0.001 per share
(e)
CUSIP No.:
03940C100
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:
The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 57,822,871 shares of Common Stock outstanding as of October 31, 2025, as reported in the Company's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2025, filed with the Securities and Exchange Commission on November 5, 2025.
(b)
Percent of class:
5.1%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
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.
See Item 2(a). The Vestal Point Fund and Account have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Common Stock reported herein.
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.
Vestal Point Capital, LP
Signature:
/s/ Ryan Wilder
Name/Title:
By: Vestal Point Capital, LLC, General Partner, By: Ryan Wilder, Chief Investment Officer and Managing Partner
What ownership stake in Arcellx (ACLX) did Vestal Point Capital report?
Vestal Point Capital and Ryan Wilder reported beneficial ownership of 2,925,000 Arcellx common shares, equal to 5.1% of the class. This percentage is calculated using 57,822,871 shares outstanding as of October 31, 2025, as disclosed in Arcellx’s Form 10-Q.
Who are the reporting persons in this Arcellx (ACLX) Schedule 13G filing?
The Schedule 13G is filed by Vestal Point Capital, LP, an investment manager, and Ryan Wilder, its Chief Investment Officer and Managing Partner. Both report beneficial ownership of the same 2,925,000 Arcellx common shares held by the Vestal Point fund and a managed account.
How was the 5.1% ownership in Arcellx (ACLX) calculated in the filing?
The 5.1% ownership figure is based on 57,822,871 Arcellx common shares outstanding as of October 31, 2025. That share count comes from Arcellx’s Form 10-Q for the quarter ended September 30, 2025, which the Schedule 13G cites when calculating the percentage.
Is Vestal Point Capital’s Arcellx (ACLX) investment described as passive or control-seeking?
The filing certifies the securities were acquired and are held in the ordinary course of business and not for the purpose or effect of changing or influencing control of Arcellx. It also states they are not held in connection with any transaction having that control-related purpose or effect.
Who has the right to dividends and sale proceeds from the Arcellx (ACLX) shares?
The Vestal Point Fund and Account have the right to receive, or direct the receipt of, dividends and proceeds from the sale of the Arcellx common shares reported. Vestal Point Capital, as investment manager, and Ryan Wilder report beneficial ownership related to those holdings.
What voting and dispositive powers are reported over Arcellx (ACLX) shares?
Both Vestal Point Capital and Ryan Wilder report shared voting power over 2,925,000 Arcellx shares and shared dispositive power over the same amount. They report no sole voting or sole dispositive power, indicating decisions are shared for those reported securities.
