Vanguard Realigns Reporting; Calix (NASDAQ: CALX) Beneficial Ownership Reported as 0

Rhea-AI Filing Summary

Calix Inc Schedule 13G/A: The Vanguard Group amended its beneficial-ownership filing to state it holds 0 shares of Calix common stock, representing 0% of the class. The amendment explains an internal realignment effective January 12, 2026, under SEC Release No. 34-39538 that caused certain Vanguard subsidiaries/divisions to report separately.

Insights

Institutional Ownership Analyst

Amendment clarifies Vanguard's disaggregated reporting; no current beneficial stake reported.

The filing shows The Vanguard Group reports 0 shares (0%) beneficially owned in Calix as of the amendment. The disclosure attributes this to an internal realignment and reliance on SEC Release No. 34-39538 for separate reporting by subsidiaries.

Cash‑flow treatment and any holdings by specific Vanguard subsidiaries are not listed in the excerpt; subsequent filings from disaggregated entities may show holdings.

Compliance & Governance Specialist

Filing is procedural, reflecting reporting structure changes rather than a trading decision.

The text cites an internal realignment dated January 12, 2026 and states certain subsidiaries will report separately in reliance on SEC Release No. 34-39538. The filer affirms no single outside party holds >5% through Vanguard-managed accounts.

Investors can expect separate 13 filings from Vanguard affiliates if those affiliates hold Calix shares; timing of those filings is not provided here.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 8)

Calix Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

(CUSIP Number)

03/13/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

The Vanguard Group

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

PENNSYLVANIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0 %

12

Type of Reporting Person (See Instructions)

IA

Comment for Type of Reporting Person: On January 12, 2026, The Vanguard Group, Inc. went through an internal realignment. In accordance with SEC Release No. 34-39538 (January 12, 1998), certain subsidiaries or business divisions of subsidiaries of The Vanguard Group, Inc., that formerly had, or were deemed to have, beneficial ownership with The Vanguard Group, Inc., will report beneficial ownership separately (on a disaggregated basis) from The Vanguard Group, Inc. in reliance on such release. These subsidiaries and/or business divisions pursue the same investment strategies as previously pursued by The Vanguard Group, Inc. prior to the realignment. Further in accordance with SEC Release No. 34-39538 (January 12, 1998), The Vanguard Group, Inc. no longer has, or is deemed to have, beneficial ownership over securities beneficially owned by such subsidiaries and/or business divisions.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Calix Inc
(b)	Address of issuer's principal executive offices: 2777 Orchard Parkway, San Jose, CA, 95134
Item 2.
(a)	Name of person filing: The Vanguard Group
(b)	Address or principal business office or, if none, residence: 100 Vanguard Blvd.,, Malvern, PA, 19355
(c)	Citizenship: PA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.:
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: 0
(b)	Percent of class: 0 %
(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: 0
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	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 Vanguard Group, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%.
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.

The Vanguard Group

Signature:	Ashley Grim
Name/Title:	Head of Global Fund Administration
Date:	03/26/2026

FAQ

What does the Schedule 13G/A amendment say about CALX ownership by Vanguard?

The amendment states The Vanguard Group holds 0 shares (0%) of Calix common stock. It attributes this reporting position to an internal realignment that caused certain subsidiaries to report separately under SEC Release No. 34-39538.

Does the filing show any Vanguard subsidiaries hold Calix (CALX) shares?

This amendment does not list subsidiary holdings; it explains subsidiaries will report separately. The filing cites the January 12, 2026 realignment and reliance on SEC Release No. 34-39538 for disaggregated reporting.

Is Vanguard claiming beneficial ownership control over CALX shares after the realignment?

No, the amendment states Vanguard "no longer has, or is deemed to have, beneficial ownership" of securities held by the disaggregated subsidiaries. The change follows SEC Release No. 34-39538 guidance.

Who signed the Schedule 13G/A amendment for Calix (CALX)?

The filing is signed by Ashley Grim, titled Head of Global Fund Administration, with a signature date of 03/26/2026. The signer attests to the amendment's disclosures.

Does this amendment indicate any trading activity in CALX by Vanguard?

No trading activity is reported; the amendment records a beneficial-ownership position of 0 shares (0%). The document frames the change as an internal reporting realignment rather than a trade.