6.9% Plus Therapeutics (PSTV) stake disclosed by CVI and Heights

Rhea-AI Filing Summary

CVI Investments, Inc. and Heights Capital Management, Inc. filed a Schedule 13G reporting beneficial ownership of 12,368,423 shares of Plus Therapeutics, Inc. common stock, representing 6.9% of the outstanding shares. All reported shares are held with shared voting and shared dispositive power, with no sole voting or dispositive authority. Heights Capital Management acts as investment manager to CVI Investments and may be deemed a beneficial owner, but both parties disclaim beneficial ownership beyond their pecuniary interest. The ownership percentage is based on 178,371,232 shares outstanding as indicated in a Plus Therapeutics prospectus filed on January 14, 2026. The filers certify that the securities are held without the purpose or effect of changing or influencing control of Plus Therapeutics.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Plus Therapeutics, Inc.

(Name of Issuer)

Common Stock, $0.001 par value per share

(Title of Class of Securities)

72941H509

(CUSIP Number)

01/14/2026

(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)

SCHEDULE 13G

CUSIP No. 72941H509

1

Names of Reporting Persons

CVI Investments, Inc.

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 12,368,423.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 12,368,423.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

12,368,423.00

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)

6.9 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: With respect to Row 6 and Row 8 above, Heights Capital Management, Inc. is the investment manager to CVI Investments, Inc. and as such may exercise voting and dispositive power over the shares reported as beneficially owned by CVI Investments, Inc. herein.

SCHEDULE 13G

CUSIP No. 72941H509

1

Names of Reporting Persons

Heights Capital Management, Inc.

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 12,368,423.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 12,368,423.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

12,368,423.00

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)

6.9 %

12

Type of Reporting Person (See Instructions)

CO

Comment for Type of Reporting Person: With respect to Row 6 and Row 8 above, Heights Capital Management, Inc. is the investment manager to CVI Investments, Inc. and as such may exercise voting and dispositive power over the shares reported as beneficially owned by CVI Investments, Inc. herein.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Plus Therapeutics, Inc.
(b)	Address of issuer's principal executive offices: 6420 Levit Green Boulevard, Suite 310, Houston, TX 77021
Item 2.
(a)	Name of person filing: This statement is filed by the entities listed below, who are collectively referred to herein as "Reporting Persons," with respect to the shares of common stock of Plus Therapeutics, Inc. (the "Company"), $0.001 par value per share (the "Shares"). (i) CVI Investments, Inc. (ii) Heights Capital Management, Inc.
(b)	Address or principal business office or, if none, residence: The address of the principal business office of CVI Investments, Inc. is: P.O. Box 309GT Ugland House South Church Street George Town Grand Cayman KY1-1104 Cayman Islands The address of the principal business office of Heights Capital Management, Inc. is: 101 California Street, Suite 3250 San Francisco, California 94111
(c)	Citizenship: Citizenship is set forth in Row 4 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
(d)	Title of class of securities: Common Stock, $0.001 par value per share
(e)	CUSIP No.: 72941H509
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 this Item 4(a) is set forth in Row 9 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The Company's Prospectus (Registration No. 333-292637), filed on January 14, 2026, indicates there were 178,371,232 Shares outstanding as of the completion of the offering of the Shares referred to therein.
(b)	Percent of class: 6.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by this Item 4(c)(i) is set forth in Row 5 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(ii) Shared power to vote or to direct the vote: The information required by this Item 4(c)(ii) is set forth in Row 6 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. Heights Capital Management, Inc., which serves as the investment manager to CVI Investments, Inc., may be deemed to be the beneficial owner of all Shares owned by CVI Investments, Inc. Each of the Reporting Persons hereby disclaims any beneficial ownership of any such Shares, except for their pecuniary interest therein.
	(iii) Sole power to dispose or to direct the disposition of: The information required by this Item 4(c)(iii) is set forth in Row 7 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
	(iv) Shared power to dispose or to direct the disposition of: The information required by this Item 4(c)(iv) is set forth in Row 8 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. Heights Capital Management, Inc., which serves as the investment manager to CVI Investments, Inc., may be deemed to be the beneficial owner of all Shares owned by CVI Investments, Inc. Each of the Reporting Persons hereby disclaims any beneficial ownership of any such Shares, except for their pecuniary interest therein.
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.
	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.
	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 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.

CVI Investments, Inc.

Signature:	/s/ Sarah Travis
Name/Title:	Sarah Travis, Assistant General Counsel and Assistant Secretary of Heights Capital Management, Inc.
Date:	01/22/2026

Heights Capital Management, Inc.

Signature:	/s/ Sarah Travis
Name/Title:	Sarah Travis, Assistant General Counsel and Assistant Secretary
Date:	01/22/2026

Comments accompanying signature: Heights Capital Management, Inc. serves as authorized agent of CVI Investments, Inc. pursuant to a Limited Power of Attorney, a copy of which is attached as Exhibit 24 hereto.

Exhibit Information

EXHIBIT INDEX EXHIBIT DESCRIPTION ________ ________ 24 Limited Power of Attorney 99 Joint Filing Agreement

FAQ

What stake in Plus Therapeutics (PSTV) do CVI Investments and Heights Capital report?

CVI Investments, Inc. and Heights Capital Management, Inc. report beneficial ownership of 12,368,423 Plus Therapeutics common shares, representing 6.9% of the company’s outstanding stock.

How many Plus Therapeutics shares are outstanding according to this Schedule 13G?

The filing states that a Plus Therapeutics prospectus indicated 178,371,232 common shares were outstanding as of the completion of the referenced offering, and this figure is used to calculate the 6.9% ownership.

Who are the reporting persons in the Plus Therapeutics (PSTV) Schedule 13G?

The Schedule 13G is filed by CVI Investments, Inc. and Heights Capital Management, Inc., which are collectively referred to as the reporting persons for Plus Therapeutics common stock.

Do CVI Investments and Heights Capital have sole or shared voting power over PSTV shares?

The reporting persons disclose 0 shares with sole voting power and 12,368,423 shares with shared voting power, and the same amounts for dispositive power.

What role does Heights Capital Management play in relation to CVI Investments’ PSTV shares?

Heights Capital Management, Inc. serves as the investment manager to CVI Investments, Inc. and may exercise voting and dispositive power over the shares that CVI reports as beneficially owned.

Is the Plus Therapeutics stake held to influence control of the company?

The certification states that the securities were not acquired and are not held for the purpose or effect of changing or influencing the control of Plus Therapeutics, other than activities related to a nomination under Rule 14a-11.

Who signed the Schedule 13G for CVI Investments and Heights Capital?

The filing is signed by Sarah Travis, Assistant General Counsel and Assistant Secretary of Heights Capital Management, Inc., who also signs as authorized agent for CVI Investments, Inc. under a Limited Power of Attorney.