SEC Form 4
Klaviyo, Inc. (KVYO) insider trading
In the 12 months to Oct 26, 2026, 8 KVYO insiders reported open-market sales of $193.3M across 51 filings; one director bought $300.3K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $193.3M
- 51 filings · 8 insiders
- Open-market purchases
- $300.3K
- 1 filing · Jennifer Ceran, Director
- Pre-arranged sales (10b5-1)
- 50 of 51
- $104.7M of $193.3M sold (54%)
Who traded KVYO, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
KVYO daily close from Oct 27, 2025 to Oct 26, 2026, between $12.86 and $33.26, last $20.56. 51 sale and 1 purchase filings by 9 insiders, marked at their filing dates. Andrew Bialecki, Chief Executive Officer → Co-Chief Executive Officer: sold $88.6M across 22 filings, first filed Nov 13, 2025, last May 28, 2026. SUMMIT INVESTORS GE IX/VC IV, LLC, 10% owner: sold $88.6M across 1 filing, first filed Aug 13, 2026, last Aug 13, 2026. Ed Hallen, Director: sold $9.2M across 6 filings, first filed Nov 12, 2025, last Oct 9, 2026. Landon Edmond, Chief Legal Officer: sold $3.1M across 7 filings, first filed Nov 21, 2025, last Sep 1, 2026. Amanda Whalen, Chief Financial Officer: sold $2.9M across 10 filings, first filed Nov 18, 2025, last Aug 18, 2026. Stephen Eric Rowland, President: sold $403.8K across 2 filings, first filed Nov 18, 2025, last Dec 17, 2025. Jennifer Ceran, Director: bought $300.3K across 1 filing, first filed Feb 17, 2026, last Feb 17, 2026. 2 others: sold $477.2K across 3 filings, first filed Nov 18, 2025, last Sep 14, 2026.
Largest mark · tap a row for others
SUMMIT INVESTORS GE IX/VC IV, LLC · 10% owner
Sale $88,550,000
5,000,000 shares at $17.71 avg
Filed Aug 13, 2026 · traded Aug 11
Close on filing date $19.22
Andrew Bialecki · Chief Executive Officer → Co-Chief Executive Officer
Chief Executive Officer → Co-Chief Executive Officer
$88.6M soldSUMMIT INVESTORS GE IX/VC IV, LLC · 10% owner
10% owner
$88.6M soldEd Hallen · Director
Director
$9.2M soldLandon Edmond · Chief Legal Officer
Chief Legal Officer
$3.1M soldAmanda Whalen · Chief Financial Officer
Chief Financial Officer
$2.9M soldStephen Eric Rowland · President
President
$403.8K soldJennifer Ceran · Director
Director
$300.3K bought2 others
Combined, one mark per week
$477.2K soldOpen-market trades
52 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Andrew Bialecki | Chief Executive Officer → Co-Chief Executive Officer | $88.6M | — | 22 | 100% of sales | |
| SUMMIT INVESTORS GE IX/VC IV, LLC | 10% owner | $88.6M | — | 1 | — | |
| Ed Hallen | Director | $9.2M | — | 6 | 100% of sales | |
| Landon Edmond | Chief Legal Officer | $3.1M | — | 7 | 100% of sales | |
| Amanda Whalen | Chief Financial Officer | $2.9M | — | 10 | 100% of sales | |
| Stephen Eric Rowland | President | $403.8K | — | 2 | 100% of sales | |
| Carmel Galvin | Chief People Officer | $306.9K | — | 1 | 100% of sales | |
| Jennifer Ceran | Director | — | $300.3K | 1 | — | |
| Ledger Susan St. | Director | $170.3K | — | 2 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Ed Hallen Director | SalePre-arranged (10b5-1) | 97,482 | $17.40 | $1.7M | Multiple accounts | |
traded | Ed Hallen Director | SalePre-arranged (10b5-1) | 1,300 | $17.02 | $22.1K | Multiple accounts | |
traded | Ledger Susan St. Director | SalePre-arranged (10b5-1) | 2,328 | $15.93 | $37.1K | 23,433 | |
traded | Landon Edmond Chief Legal Officer | SalePre-arranged (10b5-1) | 61,576 | $20.07 | $1.2M | 477,866 | |
traded | Ed Hallen Director | SalePre-arranged (10b5-1) | 98,782 | $20.48 | $2.0M | Multiple accounts | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $18.47 | $258.6K | 824,192 | |
traded | SUMMIT INVESTORS GE IX/VC IV, LLC 10% owner | Sale | 5,000,000 | $17.71 | $88.6M | 0 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $17.75 | $248.5K | 838,192 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $13.23 | $185.2K | 852,192 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 212,529 | $14.61 | $3.1M | 0 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $14.88 | $3.0M | 0 | |
traded | Ledger Susan St. Director | SalePre-arranged (10b5-1) | 9,334 | $14.27 | $133.2K | 10,939 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $14.26 | $199.6K | 895,141 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $14.61 | $2.9M | 0 | |
traded | Landon Edmond Chief Legal Officer | SalePre-arranged (10b5-1) | 9,623 | $20.00 | $192.5K | 584,124 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $18.54 | $259.6K | 895,141 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $17.19 | $3.4M | 0 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $18.63 | $3.7M | 0 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $19.42 | $3.9M | 0 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $18.17 | $3.6M | 0 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $19.37 | $3.9M | 102,621 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $19.58 | $274.2K | 417,502 | |
traded | Landon Edmond Chief Legal Officer | SalePre-arranged (10b5-1) | 14,366 | $20.15 | $289.5K | 312,362 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 206,827 | $19.96 | $4.1M | 0 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $18.64 | $3.7M | 45,978 | |
traded | Landon Edmond Chief Legal Officer | SalePre-arranged (10b5-1) | 15,093 | $20.16 | $304.3K | 326,728 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 200,000 | $16.76 | $3.4M | 39,644 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $18.88 | $264.3K | 446,938 | |
traded | Jennifer Ceran Director | Purchase | 16,339 | $18.38 | $300.3K | 30,691 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 155,219 | $25.33 | $3.9M | 0 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 167,926 | $24.16 | $4.1M | 0 | |
traded | Landon Edmond Chief Legal Officer | SalePre-arranged (10b5-1) | 10,000 | $25.83 | $258.3K | 348,281 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $25.83 | $361.7K | 448,393 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 140,646 | $27.41 | $3.9M | 90,327 | |
traded | Andrew Bialecki Co-Chief Executive Officer | SalePre-arranged (10b5-1) | 154,153 | $29.03 | $4.5M | 0 | |
traded | Andrew Bialecki Chief Executive Officer | SalePre-arranged (10b5-1) | 100,000 | $32.97 | $3.3M | 6,934 | |
traded | Ed Hallen Director | SalePre-arranged (10b5-1) | 117,550 | $30.36 | $3.6M | Multiple accounts | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 14,000 | $31.38 | $439.4K | 452,634 | |
traded | Landon Edmond Chief Legal Officer | SalePre-arranged (10b5-1) | 14,190 | $31.38 | $445.3K | 354,354 | |
traded | Ed Hallen Director | SalePre-arranged (10b5-1) | 757 | $30.15 | $22.8K | Multiple accounts | |
traded | Stephen Eric Rowland President | SalePre-arranged (10b5-1) | 7,104 | $29.45 | $209.2K | 434,294 | |
traded | Andrew Bialecki Chief Executive Officer | SalePre-arranged (10b5-1) | 238,648 | $29.61 | $7.1M | 0 | |
traded | Andrew Bialecki Chief Executive Officer | SalePre-arranged (10b5-1) | 231,362 | $29.71 | $6.9M | 0 | |
traded | Andrew Bialecki Chief Executive Officer | SalePre-arranged (10b5-1) | 142,997 | $28.63 | $4.1M | 0 | |
traded | Andrew Bialecki Chief Executive Officer | SalePre-arranged (10b5-1) | 144,717 | $27.76 | $4.0M | 0 | |
traded | Landon Edmond Chief Legal Officer | SalePre-arranged (10b5-1) | 14,394 | $27.59 | $397.1K | 380,492 | |
traded | Andrew Bialecki Chief Executive Officer | SalePre-arranged (10b5-1) | 147,329 | $27.16 | $4.0M | 0 | |
traded | Amanda Whalen Chief Financial Officer | SalePre-arranged (10b5-1) | 15,000 | $28.60 | $428.9K | 481,719 | |
traded | Carmel Galvin Chief People Officer | SalePre-arranged (10b5-1) | 11,156 | $27.51 | $306.9K | 643,896 | |
traded | Stephen Eric Rowland President | SalePre-arranged (10b5-1) | 7,104 | $27.39 | $194.6K | 441,398 | |
traded | Andrew Bialecki Chief Executive Officer | SalePre-arranged (10b5-1) | 140,464 | $29.74 | $4.2M | 0 | |
traded | Ed Hallen Director | SalePre-arranged (10b5-1) | 62,303 | $30.04 | $1.9M | Multiple accounts |
GET /stocks/filings/vX/form-4?tickers=KVYO&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"KVYO"
],
"issuer_cik": "0001835830",
"owner_cik": "0001991125",
"accession_number": "0001470831-26-000934",
"form_type": "4",
"filing_date": "2026-10-09",
"period_of_report": "2026-10-07",
"issuer_name": "Klaviyo, Inc.",
"issuer_trading_symbol": "KVYO",
"owner_name": "Hallen Ed",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": true,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Series A Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-07",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 38667,
"transaction_price_per_share": 17.4,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 55290,
"transaction_value": 672805.7999999999,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By Hodgkins Trust",
"footnotes": [
{
"id": "F1",
"description": "These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 1, 2026."
},
{
"id": "F2",
"description": "The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $17.03 to $17.63 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."
},
{
"id": "F3",
"description": "Shares are owned directly by Hodgkins Trust for the benefit of the Reporting Person and the Reporting Person's family, and of which the trustee is an independent institution. The Reporting Person disclaims Section 16 beneficial ownership of such shares except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose."
}
]
},
{
"tickers": [
"KVYO"
],
"issuer_cik": "0001835830",
"owner_cik": "0001991125",
"accession_number": "0001470831-26-000934",
"form_type": "4",
"filing_date": "2026-10-09",
"period_of_report": "2026-10-07",
"issuer_name": "Klaviyo, Inc.",
"issuer_trading_symbol": "KVYO",
"owner_name": "Hallen Ed",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": true,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Series A Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-07",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 58815,
"transaction_price_per_share": 17.4,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 388131,
"transaction_value": 1023380.9999999999,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By Hodgkins LLC",
"footnotes": [
{
"id": "F1",
"description": "These transactions were effected by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 1, 2026."
},
{
"id": "F4",
"description": "The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $17.00 to $17.63 per share. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote."
},
{
"id": "F5",
"description": "Shares held by Hodgkins LLC, of which the Reporting Person serves as manager. The Reporting Person disclaims Section 16 beneficial ownership of such shares except to the extent of his pecuniary interest therein, if any, and this report shall not be deemed to be an admission that he has beneficial ownership of such shares for Section 16 or any other purpose."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 84 records
- Tax withholding18 records
- Grants and awards14 records
- Gifts5 records
- Other47 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Role
- The title on each filing. Someone whose title changed shows more than one.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
- Counted once
- When several owners (a fund and its partners, say) report the same trade, it's counted once. Corrected filings replace the originals.
Frequently asked questions
Has Klaviyo, Inc.'s CEO sold stock?
Yes. Andrew Bialecki (CEO) sold 3,982,817 shares ($88.6M) between Nov 2025 and May 2026, all under a pre-arranged 10b5-1 plan. Gomez Luciano Fernandez (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is KVYO’s insider data?
These are KVYO Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for KVYO every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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