Wellington Management Group and affiliates report a significant ownership position in Soleno Therapeutics, Inc. They beneficially own 3,322,799 shares of Soleno common stock, representing 6.19% of the class as of December 31, 2025.
The Wellington entities report zero sole voting or dispositive power, with all voting and investment authority shared across group entities. The shares are owned of record by clients of various Wellington investment advisers, and no single client is reported to hold more than five percent of the class. The position is certified as acquired and held in the ordinary course of business and not for the purpose of changing or influencing control of Soleno.
Positive
None.
Negative
None.
Insights
Wellington discloses a 6.19% institutional stake in Soleno, held for clients and not for control.
Wellington Management Group LLP and related entities report beneficial ownership of 3,322,799 Soleno Therapeutics common shares, equal to 6.19% of the company as of December 31, 2025. Voting and dispositive powers are reported as shared, with no sole authority.
The shares are owned of record by clients of multiple Wellington investment advisers, and no individual client is identified as holding over five percent of the class. The certification states the position is held in the ordinary course of business and not to change or influence control, aligning this with typical passive institutional ownership disclosure.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Soleno Therapeutics, Inc.
(Name of Issuer)
Common Stock
(Title of Class of Securities)
834203309
(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.
834203309
1
Names of Reporting Persons
Wellington Management Group LLP
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
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
3,088,720.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
3,322,799.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,322,799.00
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)
6.2 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP No.
834203309
1
Names of Reporting Persons
Wellington Group Holdings LLP
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
3,088,720.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
3,322,799.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,322,799.00
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)
6.2 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP No.
834203309
1
Names of Reporting Persons
Wellington Investment Advisors Holdings LLP
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
3,088,720.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
3,322,799.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,322,799.00
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)
6.2 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP No.
834203309
1
Names of Reporting Persons
Wellington Management Company LLP
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
3,081,174.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
3,216,713.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
3,322,799.00
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)
6.0 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Soleno Therapeutics, Inc.
(b)
Address of issuer's principal executive offices:
100 Marine Parkway, Suite 400, Redwood City CA 94065
Item 2.
(a)
Name of person filing:
Wellington Management Group LLP
Wellington Group Holdings LLP
Wellington Investment Advisors Holdings LLP
Wellington Management Company LLP
(b)
Address or principal business office or, if none, residence:
c/o Wellington Management Company LLP, 280 Congress Street, Boston MA 02210
(c)
Citizenship:
Wellington Management Group LLP - Massachusetts
Wellington Group Holdings LLP - Delaware
Wellington Investment Advisors Holdings LLP - Delaware
Wellington Management Company LLP - Delaware
(d)
Title of class of securities:
Common Stock
(e)
CUSIP No.:
834203309
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:
See the responses to Item 9 on the attached cover pages.
(b)
Percent of class:
6.19 %
(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:
See the responses to Item 6 on the attached cover pages.
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
See the responses to Item 8 on the attached cover pages.
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.
The securities as to which this Schedule is filed are owned of record by clients of one or more investment advisers identified in Item 7 directly or indirectly owned by Wellington Management Group LLP. Those clients have the right to receive, or the power to direct the receipt of, dividends from, or the proceeds from the sale of, such securities. No such client is known to have such right or power with respect to more than five percent of this class of securities, except as follows:
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.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
Pursuant to the instructions in Item 7 of Schedule 13G, the following lists the identity and Item 3 classification of each relevant entity that beneficially owns shares of the security class being reported on this Schedule 13G.
Wellington Group Holdings LLP - HC
Wellington Investment Advisors LLP - HC
Wellington Management Global Holdings, Ltd. - HC
One or more of the following investment advisers (the "Wellington Investment Advisers"):
Wellington Management Company LLP - IA
Wellington Management Canada LLC - IA
Wellington Management Singapore Pte Ltd - IA
Wellington Management Hong Kong Ltd - IA
Wellington Management International Ltd - IA
Wellington Management Japan Pte Ltd - IA
Wellington Management Australia Pty Ltd - IA
The securities as to which this Schedule is filed by Wellington Management Group LLP, as parent holding company of certain holding companies and the Wellington Investment Advisers, are owned of record by clients of the Wellington Investment Advisers. Wellington Investment Advisors Holdings LLP controls directly, or indirectly through Wellington Management Global Holdings, Ltd., the Wellington Investment Advisers. Wellington Investment Advisors Holdings LLP is owned by Wellington Group Holdings LLP. Wellington Group Holdings LLP is owned by Wellington Management Group LLP.
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.
How many Soleno Therapeutics (SLNO) shares does Wellington beneficially own?
Wellington entities beneficially own 3,322,799 shares of Soleno Therapeutics common stock. These shares are held on behalf of multiple advisory clients of Wellington investment advisers, with no single client reported as owning more than five percent of the class.
What percentage of Soleno Therapeutics (SLNO) does Wellington’s 13G filing represent?
Wellington reports beneficial ownership of 6.19% of Soleno Therapeutics’ common stock. This percentage is based on 3,322,799 shares beneficially owned as of December 31, 2025, and reflects a sizable passive institutional position in the company’s equity.
Does Wellington have sole or shared voting power over its Soleno (SLNO) shares?
Wellington reports zero sole voting power and shared voting power over up to 3,088,720 Soleno shares. It also reports zero sole dispositive power, with shared dispositive power over 3,322,799 shares, indicating all authority is exercised collectively through Wellington-related entities.
Are Wellington’s Soleno (SLNO) holdings intended to influence control of the company?
Wellington certifies the Soleno shares were acquired and are held in the ordinary course of business. The filing states they were not acquired and are not held to change or influence control of Soleno, but instead reflect passive investment activity for advisory clients.
Who legally owns the Soleno (SLNO) shares reported in Wellington’s Schedule 13G?
The securities are owned of record by clients of one or more Wellington investment advisers. Wellington Management Group LLP and its holding-company affiliates report beneficial ownership because they directly or indirectly control these advisers managing client accounts that hold Soleno shares.
As of what date are Wellington’s Soleno (SLNO) holdings measured in this 13G?
The reported holdings are measured as of December 31, 2025, which is stated as the date of the event requiring the Schedule 13G filing. The 6.19% ownership figure and 3,322,799 shares are tied specifically to that date.
