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KVYO SCHEDULE 13G/A: SEC filing

Summit Partners and affiliated funds

Filed with the SEC on · accession 0001193125-26-461315

KVYO filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 13, 2026. A report the company filed with the SEC (the US market regulator). The stock moved +3.7% by the first close after the filing.

Summary of the filing

Summit Partners and affiliated funds filed an amended Schedule 13G reporting beneficial ownership of approximately 9.62% of Klaviyo's Series A Common Stock, held indirectly through Series B shares convertible into Series A shares.

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Key details

Aggregate Series A shares beneficially owned by Summit Partners, L.P.$13.9M
Series A shares outstanding as of October 31, 2026$130.2M
IssuerKlaviyo, Inc.
Reporting person / manager of general partnersSummit Partners, L.P.
Reporting person / direct holder of 8,187,302 sharesSummit Partners Growth Equity Fund IX-A, L.P.
Reporting person / direct holder of 5,112,037 sharesSummit Partners Growth Equity Fund IX-B, L.P.
Reporting person / direct holder of 504,825 sharesSummit Partners Co-Invest (Kiwi), L.P.
Reporting person / direct holder of 43,030 sharesSummit Investors GE IX/VC IV, LLC
Reporting person / direct holder of 5,584 sharesSummit Investors GE IX/VC IV (UK), L.P.
Investment committee member, summit partners, l.p.Peter Chung
Investment committee member, summit partners, l.p.Scott Collins
Investment committee member, summit partners, l.p.Peter Rottier

How KVYO stock reacted

Close before

$21.34

Nov 12, 2026

First close after

+3.70%

$22.13

5 trading days

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Since filing

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Frequently asked questions

What did KVYO file with the SEC on Nov 13, 2026?

KVYO filed a SCHEDULE 13G/A (SEC filing). Summit Partners and affiliated funds filed an amended Schedule 13G reporting beneficial ownership of approximately 9.62% of Klaviyo's Series A Common Stock, held indirectly through Series B shares convertible into Series A shares.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did KVYO stock react to this filing?

KVYO closed at $21.34 before the filing and $22.13 on Nov 13, 2026 (+3.70%).

Other KVYO SEC filings

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