Morgan Stanley holds 4.1% of Klaviyo (KVYO) Series A, filing shows

Rhea-AI Filing Summary

Klaviyo, Inc. Schedule 13G/A amendment reports that Morgan Stanley holds 4.1% of Series A Common Stock as shown on the cover page.

The cover shows shared voting power 717,515 and shared dispositive power 5,988,235. The filing states Morgan Stanley has "ceased to be the beneficial owner of more than five percent of the class of securities."

Insights

Governance Analyst

Passive disclosure: Morgan Stanley reports sub-5% ownership in Klaviyo Series A shares.

The amendment lists a 4.1% beneficial ownership stake with shared voting power 717,515 and shared dispositive power 5,988,235. This reflects aggregated holdings of Morgan Stanley reporting units as described in the filing.

Timing: the cover references 02/28/2026 and the signature is dated 03/06/2026. The filing notes that the firm "ceased to be the beneficial owner of more than five percent," indicating the position fell below the 5% reporting threshold.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Klaviyo, Inc.

(Name of Issuer)

Series A Common Stock

(Title of Class of Securities)

02/28/2026

(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 Number(s):

1

Names of Reporting Persons

Morgan Stanley

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 717,515.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,988,235.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,988,235.00

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)

4.1 %

12

Type of Reporting Person (See Instructions)

HC, CO

Comment for Type of Reporting Person: As of the date hereof, Morgan Stanley has ceased to be the beneficial owner of more than five percent of the class of securities.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Klaviyo, Inc.
(b)	Address of issuer's principal executive offices: 125 SUMMER STREET, FLOOR 6, BOSTON, MA, 02110
Item 2.
(a)	Name of person filing: Morgan Stanley
(b)	Address or principal business office or, if none, residence: 1585 Broadway, New York, NY 10036
(c)	Citizenship: Delaware
(d)	Title of class of securities: Series A Common Stock
(e)	CUSIP No.: 49845K101
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 response(s) to Item 9 on the attached cover page(s).
(b)	Percent of class: 4.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See the response(s) to Item 5 on the attached cover page(s).
	(ii) Shared power to vote or to direct the vote: See the response(s) to Item 6 on the attached cover page(s).
	(iii) Sole power to dispose or to direct the disposition of: See the response(s) to Item 7 on the attached cover page(s).
	(iv) Shared power to dispose or to direct the disposition of: See the response(s) to Item 8 on the attached cover page(s).
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.
	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 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. * In Accordance with the Securities and Exchange Commission Release No. 34-39538 (January 12, 1998) (the "Release"), this filing reflects the securities beneficially owned, or that may be deemed to be beneficially owned, by certain operating units (collectively, the "MS Reporting Units") of Morgan Stanley and its subsidiaries and affiliates (collectively, "MS"). This filing does not reflect securities, if any, beneficially owned by any operating units of MS whose ownership of securities is disaggregated from that of the MS Reporting Units in accordance with the Release.

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.

Morgan Stanley

Signature:	Claire Gordon
Name/Title:	Authorized Signatory, Morgan Stanley
Date:	03/06/2026

FAQ

What stake does Morgan Stanley report in Klaviyo (KVYO)?

Morgan Stanley reports a 4.1% beneficial ownership of Klaviyo's Series A Common Stock. The filing lists shared voting power 717,515 and shared dispositive power 5,988,235 in the response fields on the cover page.

Does the filing say Morgan Stanley still owns more than 5% of KVYO?

No. The filing explicitly states that Morgan Stanley has ceased to be the beneficial owner of more than five percent of the class. The reported stake is shown as 4.1% in Item 4(b).

What dates are shown in the Schedule 13G/A amendment for KVYO?

The cover references 02/28/2026 and the signature block is dated 03/06/2026. Those dates appear in the amendment and signature sections respectively.

Are the ownership numbers reported for Morgan Stanley direct or aggregated?

The filing states the figures reflect aggregated holdings of certain Morgan Stanley operating units (the "MS Reporting Units"). It follows Release No. 34-39538 aggregation guidance as noted in Item 5.

Who signed the Schedule 13G/A amendment for Morgan Stanley?

The amendment is signed by Claire Gordon as an Authorized Signatory, Morgan Stanley, with the signature date shown as 03/06/2026.