# EDGAR Filing Document

**Accession Number:** 0001835830
**File Stem:** 0001835830-25-000083
**Filing Date:** 2025-8
**Character Count:** 48429
**Document Hash:** 85dc6fbce3351992ed9f62c672010206
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001835830-25-000083.hdr.sgml**: 20250805

**ACCESSION NUMBER**: 0001835830-25-000083

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20250805

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250805

**DATE AS OF CHANGE**: 20250805

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Klaviyo, Inc.
- **CENTRAL INDEX KEY:** 0001835830
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41806
- **FILM NUMBER:** 251185091

**BUSINESS ADDRESS:**
- **STREET 1:** 125 SUMMER STREET, FLOOR 6
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 800-338-1744

**MAIL ADDRESS:**
- **STREET 1:** 125 SUMMER STREET, FLOOR 6
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110

?xml version='1.0' encoding='ASCII'? kvyo-20250805

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**___________________________________**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the** 

**Securities Exchange Act of 1934**

**___________________________________**

**Date of Report (Date of earliest event reported): August 5, 2025**

**Klaviyo, Inc.**

(Exact name of registrant as specified in its charter)

**___________________________________**

---

| | | |
|:---|:---|:---|
| **Delaware**<br>(State or other jurisdiction of <br>incorporation or organization) | **001-41806**<br>(Commission File Number) | **46-0989964**<br>(IRS Employer Identification Number) |
| **125 Summer Street, 6th Floor, Boston, MA**  | **125 Summer Street, 6th Floor, Boston, MA**  | &nbsp;&nbsp;&nbsp;&nbsp;**02110** |
| (Address of Principal Executive Offices) | (Address of Principal Executive Offices) | (Zip Code) |
| **(617) 213-1788** | **(617) 213-1788** | **(617) 213-1788** |
| (Registrant's telephone number, including area code) | (Registrant's telephone number, including area code) | (Registrant's telephone number, including area code) |

---

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

---

| | | |
|:---|:---|:---|
| **Securities registered pursuant to Section 12(b) of the Act:** | **Securities registered pursuant to Section 12(b) of the Act:** | **Securities registered pursuant to Section 12(b) of the Act:** |
| **<u>Title of each class</u>** | **<u>Trading Symbol</u>** | **<u>Name of each exchange on which registered</u>** |
| Series A common stock, par value $0.001 per share | KVYO | New York Stock Exchange |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company&nbsp;&nbsp;&nbsp;&nbsp;☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

**Item 2.02 - Results of Operations and Financial Condition**

On August 5, 2025, Klaviyo, Inc. issued a press release announcing financial results for the second quarter ended June 30, 2025. A copy of the release is furnished with this report as Exhibit 99.1.

The information in this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is intended to be furnished and shall not be deemed "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such filing.

**Item 9.01 - Financial Statements and Exhibits**

(d) The following exhibits are being filed herewith:

---

| | |
|:---|:---|
| **<u>Exhibit No.</u>** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**<u>Description</u>** |
| 99.1 | <u>[Press Release issued by Klaviyo, Inc. dated August 5, 2025](confidentialfiscalq22025ea.htm)</u> |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

------

**SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized on this 5th day of August, 2025.

---

| | |
|:---|:---|
| **KLAVIYO, INC.** | **KLAVIYO, INC.** |
| By: | /s/ Amanda Whalen |
| Name: | Amanda Whalen |
| Title: | Chief Financial Officer |

---

## Exhibit 99.1

**Klaviyo Announces Second Quarter 2025 Financial Results** 

***Second quarter revenue of $293.1 million, representing* 32% *year-over-year growth***

***Raises FY25 revenue guidance to $1.195 billion to $1.203 billion, for year-over-year growth of 27% to 28%***

**BOSTON, August 5, 2025 —** <u>Klaviyo</u> (NYSE: KVYO), the only CRM built for consumer brands, today announced results for its second quarter ended June 30, 2025.

"Klaviyo delivered another standout quarter, with revenue growing 32% year-over-year to $293 million, underscoring the vital role our B2C CRM platform plays for over 176,000 customers globally," said Andrew Bialecki, co-founder and CEO of Klaviyo. "Our AI-native platform is built to help brands personalize at scale—turning data into action in real time to drive measurable growth and deepen customer relationships. Across both Marketing and Service, we're enabling brands to move faster, act smarter, and unlock entirely new possibilities for how they connect with consumers."

**<u>Recent Business Highlights:</u>**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Announced the public beta of Klaviyo Service, a disruptive suite of AI-powered tools that puts AI shopping agents, real-time customer data, and seamless service experiences within reach of every brand.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Closed new and expanded existing customer accounts, such as Princess Polly, Winston Flowers, Loop Earplugs, and others during the quarter ended June 30, 2025.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Over 176,000 customers were using Klaviyo to drive their own revenue growth as of June 30, 2025, compared to over 151,000 customers as of June 30, 2024.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Continued growing our number of large customers, ending the quarter with 3,291 customers generating over $50,000 of ARR, compared to 2,386 at the end of the second quarter of 2024, an increase of 38% year-over-year.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Drove continued international expansion with 42% year-over-year revenue growth in EMEA and APAC.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;● Grew with our existing customer base, with NRR of 108% as of June 30, 2025.

"Our second quarter results underscore Klaviyo's efficient growth at scale, as revenue increased 32% year-over-year to $293 million and we delivered more than $55 million in operating cash flow," said Amanda Whalen, CFO of Klaviyo. "This outstanding performance, driven by broad-based strength across customers and significant international growth, validates the critical value our unified B2C CRM platform delivers."

**<u>Second Quarter 2025 Financial Highlights:</u>**

*$ in millions (except per share amounts)*

------

---

| | |
|:---|:---|
| | **Q2 FY25** |
| Revenue | $293.1 |
| YoY Growth | 32% |
| Gross Profit | $221.9 |
| Gross Margin | 76% |
| Non-GAAP Gross Profit | $224.1 |
| Non-GAAP Gross Margin | 76% |
| Operating Loss | $(31.3) |
| Operating Margin | (11)% |
| Non-GAAP Operating Income | $40.9 |
| Non-GAAP Operating Margin | 14% |
| Net loss per share, basic and diluted | $(0.09) |
| Non-GAAP net income per share, basic | $0.17 |
| Non-GAAP net income per share, diluted | $0.16 |
| Cash from Operating Activities | $55.7 |
| Free Cash Flow | $59.3 |

---

**<u>Financial Outlook</u>**

<br> ---

| | | | | |
|:---|:---|:---|:---|:---|
| $ in millions | **FY25-Q3 Guidance** | **FY25-Q3 Guidance** | **FY25 Guidance** | **FY25 Guidance** |
|  | **Low** | **High** | **Low** | **High** |
| Revenue | $297.0 | $301.0 | $1195.0 | $1203.0 |
| *Year-over-year Growth Rate* | *26%* | *28%* | *27%* | *28%* |
| Non-GAAP Operating Income | $32.5 | $35.5 | $144.0 | $150.0 |
| *Non-GAAP Operating Margin* | *11%* | *12%* | *12%* | *12%* |
| *Fully Diluted Shares Outstanding (Millions)* | 309 | 309 | 308 | 308 |

---

Klaviyo has not provided a reconciliation of non-GAAP operating income guidance measures to the most directly comparable GAAP measures because certain items excluded from GAAP cannot be reasonably calculated or predicted at this time. Accordingly, a reconciliation is not available without unreasonable effort. Stock-based compensation-related charges, including employer payroll tax-related items on employee stock transactions, are impacted by the timing of employee stock transactions, the future fair market value of our common stock, and our future hiring and retention needs, all of which are difficult to predict and subject to constant change.

**<u>Dilutive Securities</u>**

<br>Klaviyo has various dilutive securities. The table below details these securities (shares in millions; rounding differences may occur):

------

---

| | | | |
|:---|:---|:---|:---|
| | **Price as of June 30, 2025** | **Weighted Average Exercise Price** | **Shares** |
| Share price | $33.58 |  |  |
| Common stock outstanding as of 6/30/2025 |  |  | 299.6 |
| Warrants outstanding |  |  | 3.1 |
| RSUs outstanding |  |  | 18.4 |
| Options outstanding |  | $2.25 | 2.6 |
| ESPP shares outstanding |  |  |  |
| Total estimated fully diluted shares |  |  | 323.7 |

---

&nbsp;&nbsp;&nbsp;&nbsp;

We have excluded the impact of the Shopify investment option of 15,743,174 shares at $88.93 per share as it was out of the money as of June 30, 2025. The investment option expires on July 28, 2030.

**<u>Executive Leadership Update</u>**

Klaviyo also announced that on July 30, 2025, Steve Rowland informed the company of his intention to retire from his position as President. Mr. Rowland will remain in his role until December 31, 2025, following which he will remain at the company as a strategic advisor to help with the transition until March 31, 2026.

"Steve has been instrumental in our mid-market and enterprise growth, expanding our partner ecosystem, and building a world-class go-to-market team. During his time here, our revenue run rate grew from $660M to $1.1B. We're grateful for his impact and wish him the best in what's next," said Bialecki.

"I'm incredibly proud of what we've accomplished together at Klaviyo. From the IPO to our continued momentum upmarket and expansion globally, it's been a privilege to help shape such an important chapter. I look forward to supporting the team with a smooth transition in the coming months," said Steve Rowland.

**<u>Conference Call Information</u>**

In conjunction with this announcement, Klaviyo will host a conference call for investors at 4:30 p.m. ET (1:30 p.m. PT) today to discuss the results for its second quarter ended June 30, 2025 and its outlook for its third quarter ending September 30, 2025 and fiscal year ending December 31, 2025. The live webcast and a replay of the webcast will be available at the Investor Relations section of Klaviyo's website: https://investors.klaviyo.com (live and replay).

**<u>Select Defined Terms</u>**

***Customers.*** We define a customer as a distinct paid subscription to our platform. A single organization could have multiple discrete contracting divisions or subsidiaries or brands each with paid subscriptions to our platform, which would, in general, constitute multiple distinct customers. In some cases at the customer's request, we allow subscriptions under the same parent organization to be consolidated into a single paid subscription in which case such consolidated paid subscriptions would constitute a single customer. We measure our total number of customers

------

as a point-in-time calculation measured as of the end of a particular period. Customers do not include persons or entities that use our platform on a free trial basis.

***Customers Generating Over $50,000 of ARR.*** We calculate our number of customers generating over $50,000 of ARR (as defined below) as those customers that have an average ARR of greater than $50,000 over the prior twelve months (or the entire duration of the customer's paying relationship, if it is less than twelve months) as of the date of determination. We believe the number of customers generating over $50,000 of ARR is a key performance metric to help investors and others understand and evaluate our results of operations in the same manner as our management team, as it is an indicator of our ability to grow the number of customers that are exceeding this ARR threshold, both from our existing customers expanding their usage of our platform and from our sales to larger customers. We believe this is an important indicator of our ability to continue to successfully move up market.

***Dollar-Based Net Revenue Retention Rate.*** We calculate our Dollar-Based Net Revenue Retention Rate ("NRR") by first identifying the cohort of customers as of twelve months prior to the date of determination. We then calculate the Annualized Recurring Revenue ("ARR") from this customer cohort as of twelve months prior to the date of determination (the "Prior Period ARR") and the ARR from this customer cohort as of the date of determination (the "Current Period ARR"). ARR, for any date of determination, is the annualized value of existing paid subscriptions, which we calculate by taking the amount of revenue that we expect to receive in the next monthly period for our existing paid subscriptions, assuming no changes to such subscriptions in the next month, as of that date of determination, and multiplying that amount by twelve. Current Period ARR includes any expansion, price increases, and customer subscriptions that are deactivated and subsequently reactivated during the applicable twelve-month period and reflects contraction or attrition over the last twelve months from this customer cohort, but excludes any ARR from new customers in the current period. We then divide the total Current Period ARR by the total Prior Period ARR to arrive at the point-in-time NRR. We then calculate the weighted average point-in-time NRR as of the last day of each month in the current trailing twelve-month period to arrive at the NRR, with the weightings determined by the total ARR at the end of each period. We believe NRR is a key performance metric to help investors and others understand and evaluate our results of operations in the same manner as our management team, as it represents the expansion in usage of our platform by our existing customers, which is an important measure of the health of our business and future growth prospects. We measure Dollar-Based Net Revenue Retention Rate to measure this growth.

**<u>About Klaviyo</u>**

Source: Klaviyo, Inc.

------

**<u>Contact</u>**

**Investor Relations**

Andrew Zilli<br><u>ir@klaviyo.com</u>

**Press**

Danielle Killick

<u>press@klaviyo.com</u>

**<u>Forward Looking Statements</u>**

<br>This press release includes certain "forward-looking statements" within the meaning of the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, as amended. Other than statements of historical facts, all statements contained in this press release, including, but not limited to, statements about Klaviyo's outlook for the third quarter of fiscal year 2025 ending September 30, 2025 and the full fiscal year ending December 31, 2025, and Klaviyo's expectations regarding possible or assumed business strategies, potential growth and innovation opportunities, new products, potential market opportunities, and other similar matters, are forward-looking statements. Words such as "aim," "anticipate," "believe," "contemplate," "continue," "could," "estimate," "expect," "future," "going to," "guidance," "intend," "keep," "may," "opportunity," "outlook," "plan," "potential," "predict," "project," "shall," "should," "strategy," "target," "will," "would," or words of similar meaning or similar references to future periods may identify these forward-looking statements, although not all forward-looking statements contain these identifying words.

Forward-looking statements reflect management's beliefs, expectations and assumptions about future events as of the date hereof, which are inherently subject to uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. These risks include, among others, the following: our ability to achieve future growth and sustain our growth rate; our ability to successfully execute our business and growth strategy, such as the success of our investment in our key growth initiatives and our ability to recognize effective areas for growth; our ability to successfully integrate with third-party platforms; our relationships with third parties, such as our marketing agency and technology partners; unfavorable conditions in our industry; our ability to attract new customers, including mid-market and enterprise customers, retain revenue from existing customers and increase sales from both new and existing customers; our ability to leverage artificial intelligence and machine learning in our products; our ability to sustain strong international growth; the success of our marketing and sales strategies; costs and expenses associated with being a public company; the impact of macroeconomic factors, including tariffs; as well as other risks and uncertainties set forth under the caption "Risk Factors" and elsewhere in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2025, as filed with the Securities and Exchange Commission (the "SEC"), and the other filings and reports we make with the SEC from time to time, which may be obtained on our Investor Relations website at https://investors.klaviyo.com and on the SEC website at www.sec.gov. Moreover, we operate in a very competitive and rapidly changing environment, and new risks may emerge from time to time. It is not possible for our management to predict all risks, nor can we assess the impact of all factors on our business or

------

the extent to which any factor(s) may cause actual results or outcomes to differ materially from those contained in any forward-looking statements we may make. In light of the risks, uncertainties, assumptions, and other factors, the future events and trends discussed in this press release may not occur and actual results could differ materially and adversely from those anticipated or implied in the forward-looking statements. Therefore, you should not rely on any of the forward-looking statements. Any forward-looking statement made by us in this press release is based only on information currently available to us and speaks only as of the date on which it is made. Other than as required by law, we assume no obligation to update any forward-looking statements contained in this press release in the event of new information, future developments or otherwise.

**<u>Statement Regarding Use of Non-GAAP Financial Measures</u>**

In addition to financial measures prepared in accordance with generally accepted accounting principles in the United States (GAAP), this press release and the accompanying tables contain non-GAAP financial measures, including non-GAAP gross profit, non-GAAP gross margin, non-GAAP operating income, non-GAAP operating expenses, non-GAAP operating margin, non-GAAP net income, non-GAAP net income per share, basic, non-GAAP net income per share, diluted, free cash flow, and free cash flow margin. The non-GAAP financial information is presented for supplemental informational purposes only and is not intended to be considered in isolation or as a substitute for, or superior to, financial information prepared and presented in accordance with GAAP. Please see the accompanying tables for reconciliations of these non-GAAP financial measures to their nearest GAAP equivalents.

Our non-GAAP gross profit, non-GAAP operating income, non-GAAP operating expenses, and non-GAAP net income exclude significant expenses and income that are required by GAAP to be recorded in our consolidated financial statements, including, but not limited to, (i) amortization of prepaid marketing expenses, (ii) stock-based compensation and related employer payroll taxes, and (iii) restructuring expenses. Our non-GAAP gross margin is calculated as non-GAAP gross profit divided by total revenue. Our non-GAAP operating margin is calculated as non-GAAP operating income divided by total revenue. Our non-GAAP net income per share, basic, is calculated as non-GAAP net income divided by weighted average shares outstanding - basic for purposes of calculating non-GAAP net income per share. Our non-GAAP net income per share, diluted, is calculated as non-GAAP net income divided by weighted average shares outstanding - diluted for purposes of calculating non-GAAP net income per share. Free cash flow is defined as cash and cash equivalents provided by or used in operating activities less purchases of property and equipment and capitalization of software development costs. Free cash flow margin is a non-GAAP financial measure that is calculated as free cash flow divided by total revenue.

Stock-based compensation expense includes the net effects of capitalization and amortization of stock-based compensation expense related to capitalized software. Stock-based compensation expense has been, and will continue to be for the foreseeable future, a significant recurring expense in our business and an important part of the compensation provided to our employees. Because of varying available valuation methodologies, subjective assumptions, and the variety of equity instruments that can impact a company's non-cash expenses, we believe that providing non-GAAP financial measures that exclude stock-based compensation expense allows for meaningful comparisons between our operating results from period to period. When evaluating the performance of its business and making operating plans, Klaviyo does not consider these items (for example, when considering the impact of equity award grants, the company places a greater emphasis on the amount of overall stockholder dilution than the

------

accounting charges associated with such grants). The amount of employer payroll tax-related items on employee stock transactions is dependent on restricted stock unit settlements, option exercises, related stock price, and other factors that are beyond Klaviyo's control and that do not correlate to the operation of the business. The expense related to amortization of prepaid marketing expense of warrants issued to Shopify is dependent upon estimates and assumptions; therefore, Klaviyo believes non-GAAP measures that adjust for the amortization of prepaid marketing expense provide investors a consistent basis for comparison across accounting periods. Klaviyo believes that the economic impact of the partnership is best measured in the form of stockholder dilution and as such we have provided a reconciliation that shows the full dilutive impact of all outstanding equity instruments. Overall, Klaviyo believes it is useful to exclude these expenses in order to better understand the long-term performance of its core business and to facilitate comparison of its results period-over-period and to those of peer companies. All of these non-GAAP financial measures are important tools for financial and operational decision-making and for evaluating Klaviyo's own operating results over different periods of time.

We believe that all these non-GAAP financial measures provide useful information about our financial performance, enhance the overall understanding of our past performance and future prospects and allow for greater transparency with respect to decision making by our management, who use these measures as important tools for financial and operational decision-making and for evaluating Klaviyo's own operating results over different periods of time.

Investors are cautioned that there are material limitations associated with the use of non-GAAP financial measures versus their nearest GAAP equivalents. Other companies may calculate non-GAAP financial measures differently or may use other measures to evaluate their performance, all of which could reduce the usefulness of our non-GAAP financial measures as tools for comparison. Further, stock-based compensation expense has been, and will continue to be for the foreseeable future, a significant recurring expense in Klaviyo's business and an important part of the compensation provided to attract and retain its employees to create long-term incentive alignment with stockholders.

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Condensed Consolidated Balance Sheet (Unaudited)** | **Condensed Consolidated Balance Sheet (Unaudited)** | **Condensed Consolidated Balance Sheet (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **As of** | **As of** |
| | **June 30, 2025** | **December 31, 2024** |
| **Assets** | | |
| Current assets: |  |  |
| &nbsp;&nbsp;&nbsp;Cash and cash equivalents | $935516 | $881473 |
| &nbsp;&nbsp;&nbsp;Restricted cash |  | 375 |
| &nbsp;&nbsp;&nbsp;Accounts receivable, net of allowance for doubtful accounts | 58843 | 43095 |
| &nbsp;&nbsp;&nbsp;Deferred contract acquisition costs, current | 25070 | 20544 |
| &nbsp;&nbsp;&nbsp;Prepaid expenses and other current assets | 41642 | 34262 |
| Total current assets | 1061071 | 979749 |
| Property and equipment, net | $56677 | $48200 |
| Right-of-use assets, net | 86592 | 42917 |
| Deferred contract acquisition costs, non-current | 36799 | 32527 |
| Restricted cash, non-current | 738 | 739 |
| Prepaid marketing expense | 143098 | 153346 |
| Other non-current assets | 12907 | 15830 |
| Total assets | $1397882 | $1273308 |
| **Liabilities and stockholders' equity** |  |  |
| Current liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;Accounts payable | $22879 | $14579 |
| &nbsp;&nbsp;&nbsp;Accrued expenses | 89563 | 99828 |
| &nbsp;&nbsp;&nbsp;Lease liabilities, current | 19086 | 20989 |
| &nbsp;&nbsp;&nbsp;Deferred revenue | 82711 | 64497 |
| Total current liabilities | 214239 | 199893 |
| Lease liabilities, non-current | 80101 | 32449 |
| Other non-current liabilities | 6790 | 6979 |
| Total liabilities | 301130 | 239321 |
| **Stockholders' equity** |  |  |
| &nbsp;&nbsp;&nbsp;Preferred stock |  |  |
| &nbsp;&nbsp;&nbsp;Common stock - Series A | 117 | 89 |
| &nbsp;&nbsp;&nbsp;Common stock - Series B | 183 | 184 |
| &nbsp;&nbsp;&nbsp;Additional paid-in capital | 1980007 | 1878899 |
| &nbsp;&nbsp;&nbsp;Accumulated deficit | (883555) | (845185) |
| Total stockholders' equity | 1096752 | 1033987 |
| Total liabilities and stockholders' equity | $1397882 | $1273308 |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Condensed Consolidated GAAP Statement of Operations (Unaudited)** | **Condensed Consolidated GAAP Statement of Operations (Unaudited)** | **Condensed Consolidated GAAP Statement of Operations (Unaudited)** |
| ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** |
| | **Three Months Ended June 30,** | **Three Months Ended June 30,** |
|  | **2025** | **2024** |
| Revenue | $293117 | $222213 |
| Cost of revenue | 71236 | 50271 |
| Gross profit | 221881 | 171942 |
| Operating expenses: |  |  |
| &nbsp;&nbsp;&nbsp;Selling and marketing | 126632 | 94501 |
| &nbsp;&nbsp;&nbsp;Research and development | 72459 | 55735 |
| &nbsp;&nbsp;&nbsp;General and administrative | 54116 | 35759 |
| Total operating expenses | 253207 | 185995 |
| Operating loss | (31326) | (14053) |
| &nbsp;&nbsp;&nbsp;Other expense | (898) | (7) |
| &nbsp;&nbsp;&nbsp;Interest income | 9743 | 9979 |
| Total other income | 8845 | 9972 |
| Loss before income taxes | (22481) | (4081) |
| Provision for income taxes | 1800 | 861 |
| Net loss | $(24281) | $(4942) |
| Net loss per share attributable to Series A and Series B common stockholders, basic and diluted | $(0.09) | $(0.02) |
| Weighted average common shares outstanding, basic and diluted | 284928388 | 265293214 |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Condensed Consolidated GAAP Statement of Operations (Unaudited)** | **Condensed Consolidated GAAP Statement of Operations (Unaudited)** | **Condensed Consolidated GAAP Statement of Operations (Unaudited)** |
| ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** |
| | **Six Months Ended June 30,** | **Six Months Ended June 30,** |
|  | **2025** | **2024** |
| Revenue | $572944 | $432206 |
| Cost of revenue | 138936 | 95209 |
| Gross profit | 434008 | 336997 |
| Operating expenses: |  |  |
| &nbsp;&nbsp;&nbsp;Selling and marketing | 250159 | 186359 |
| &nbsp;&nbsp;&nbsp;Research and development | 141808 | 111832 |
| &nbsp;&nbsp;&nbsp;General and administrative | 97117 | 74951 |
| Total operating expenses | 489084 | 373142 |
| Operating loss | (55076) | (36145) |
| &nbsp;&nbsp;&nbsp;Other (expense) income | (1562) | 61 |
| &nbsp;&nbsp;&nbsp;Interest income | 19002 | 19525 |
| Total other income | 17440 | 19586 |
| Loss before income taxes | (37636) | (16559) |
| Provision for income taxes | 734 | 1265 |
| Net loss | $(38370) | $(17824) |
| Net loss per share attributable to Series A and Series B common stockholders, basic and diluted | $(0.14) | $(0.07) |
| Weighted average common shares outstanding, basic and diluted | 279674052 | 263319667 |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Condensed Consolidated Statement of Cash Flows (Unaudited)** | **Condensed Consolidated Statement of Cash Flows (Unaudited)** | **Condensed Consolidated Statement of Cash Flows (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Three Months Ended June 30,** | **Three Months Ended June 30,** |
|  | **2025** | **2024** |
| **Operating activities** |  |  |
| Net loss | $(24281) | $(4942) |
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
| &nbsp;&nbsp;&nbsp;Depreciation and amortization expense | 3931 | 4235 |
| &nbsp;&nbsp;&nbsp;Non-cash operating lease costs | 6620 | 3236 |
| &nbsp;&nbsp;&nbsp;Amortization of deferred contract acquisition costs | 7222 | 4463 |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing expense | 13225 | 13225 |
| &nbsp;&nbsp;&nbsp;Bad debt (recovery) expense | (281) | 349 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation expense | 45404 | 33506 |
| &nbsp;&nbsp;&nbsp;Other |  | 10 |
| &nbsp;&nbsp;&nbsp;Changes in operating assets and liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts receivable | (4653) | (6334) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deferred contract acquisition costs | (11627) | (7506) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Prepaid expenses, prepaid taxes, and other assets | 1403 | (494) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts payable | 8520 | 811 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accrued expenses | 9267 | (211) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deferred revenue | 6524 | 4263 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Operating lease liabilities | (5899) | (3930) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other non-current liabilities | 350 | 219 |
| &nbsp;&nbsp;&nbsp;Net cash provided by operating activities | 55725 | 40900 |
| **Investing activities** |  |  |
| Acquisition of property and equipment | (2060) | (769) |
| Capitalization of software development costs | (5247) | (3066) |
| &nbsp;&nbsp;&nbsp;Net cash used in investing activities | (7307) | (3835) |
| **Financing activities** |  |  |
| Proceeds from exercise of common stock options | 589 | 721 |
| Cash paid for finance leases |  | (6) |
| Proceeds from exercise of warrants | 4 | 3 |
| Employee taxes paid related to net share settlement of stock-based awards | (4569) | (1904) |
| Proceeds from employee stock purchase plan | 2641 | 1873 |
| &nbsp;&nbsp;&nbsp;Net cash (used in) provided by financing activities | (1335) | 687 |
| Net increase in cash, cash equivalents, and restricted cash | 47083 | 37752 |
| Cash, cash equivalents, and restricted cash, beginning of period | 889171 | 756877 |
| Cash, cash equivalents, and restricted cash, end of period | $936254 | $794629 |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Condensed Consolidated Statement of Cash Flows (Unaudited)** | **Condensed Consolidated Statement of Cash Flows (Unaudited)** | **Condensed Consolidated Statement of Cash Flows (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Six Months Ended June 30,** | **Six Months Ended June 30,** |
|  | **2025** | **2024** |
| **Operating activities** |  |  |
| Net loss | $(38370) | $(17824) |
| Adjustments to reconcile net loss to net cash used in operating activities: |  |  |
| &nbsp;&nbsp;&nbsp;Depreciation and amortization expense | 8712 | 8209 |
| &nbsp;&nbsp;&nbsp;Non-cash operating lease costs | 12395 | 6288 |
| &nbsp;&nbsp;&nbsp;Amortization of deferred contract acquisition costs | 13830 | 8396 |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing expense | 26449 | 26449 |
| &nbsp;&nbsp;&nbsp;Gain on derecognition of asset retirement obligation | (588) |  |
| &nbsp;&nbsp;&nbsp;Loss on disposal of property and equipment | 419 | 32 |
| &nbsp;&nbsp;&nbsp;Bad debt expense | 1536 | 289 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation expense | 83731 | 69133 |
| &nbsp;&nbsp;&nbsp;Other |  | (11) |
| &nbsp;&nbsp;&nbsp;Changes in operating assets and liabilities: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts receivable | (17283) | (6439) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deferred contract acquisition costs | (22628) | (14748) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Prepaid expenses, prepaid taxes, and other assets | (4504) | (7332) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accounts payable | 9204 | (4250) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Accrued expenses | (9548) | (455) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Deferred revenue | 18214 | 6682 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Operating lease liabilities | (11291) | (7845) |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Other non-current liabilities | (191) | 508 |
| &nbsp;&nbsp;&nbsp;Net cash provided by operating activities | 70087 | 67082 |
| **Investing activities** |  |  |
| Acquisition of property and equipment | (4745) | (2028) |
| Capitalization of software development costs | (10303) | (5032) |
| &nbsp;&nbsp;&nbsp;Net cash used in investing activities | (15048) | (7060) |
| **Financing activities** |  |  |
| Proceeds from exercise of common stock options | 1466 | 4310 |
| Cash paid for finance leases |  | (11) |
| Proceeds from exercise of warrants | 7 | 7 |
| Employee taxes paid related to net share settlement of stock-based awards | (8948) | (13769) |
| Proceeds from employee stock purchase plan | 6103 | 4413 |
| &nbsp;&nbsp;&nbsp;Net cash used in financing activities | (1372) | (5050) |
| Net increase in cash, cash equivalents, and restricted cash | 53667 | 54972 |
| Cash, cash equivalents, and restricted cash, beginning of period | 882587 | 739657 |
| Cash, cash equivalents, and restricted cash, end of period | $936254 | $794629 |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)** | **Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)** | **Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Three Months Ended June 30,** | **Three Months Ended June 30,** |
|  | **2025** | **2024** |
| Gross profit | $221881 | $171942 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | 1955 | 2621 |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | 248 | 180 |
| Non-GAAP gross profit | $224084 | $174743 |
| Gross margin | 75.7% | 77.4% |
| Non-GAAP gross margin | 76.4% | 78.6% |

---

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)** | **Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)** | **Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Three Months Ended June 30,** | **Three Months Ended June 30,** |
|  | **2025** | **2024** |
| Operating loss | $(31326) | $(14053) |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | 45404 | 33506 |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | 13591 | 1647 |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | 13225 | 13225 |
| Non-GAAP operating income | $40894 | $34325 |
| Operating margin | (10.7)% | (6.3)% |
| Non-GAAP operating margin | 14.0% | 15.4% |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)** | **Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)** | **Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)** |
| ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** |
| | **Three Months Ended June 30,** | **Three Months Ended June 30,** |
|  | **2025** | **2024** |
| Net loss | $(24281) | $(4942) |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | 45404 | 33506 |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | 13591 | 1647 |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | 13225 | 13225 |
| Non-GAAP net income | $47939 | $43436 |
| Non-GAAP net income per share attributable to Series A and Series B common stockholders: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Basic | $0.17 | $0.16 |
| &nbsp;&nbsp;&nbsp;&nbsp;Diluted | $0.16 | $0.15 |
| Shares used in non-GAAP per share calculations: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Basic | 284928388 | 265293214 |
| &nbsp;&nbsp;&nbsp;&nbsp;Diluted | 304877359 | 297466637 |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)** | **Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)** | **Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Three Months Ended June 30,** | **Three Months Ended June 30,** |
|  | **2025** | **2024** |
| Selling and marketing | $126632 | $94501 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (14329) | (10175) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (898) | (472) |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | (13225) | (13225) |
| Non-GAAP Selling and marketing | $98180 | $70629 |
| Research and development | $72459 | $55735 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (18643) | (13053) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (1109) | (706) |
| Non-GAAP Research and development | $52707 | $41976 |
| General and administrative | $54116 | $35759 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (10477) | (7657) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (11336) | (289) |
| Non-GAAP General and administrative | $32303 | $27813 |
| Total operating expenses | $253207 | $185995 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (43449) | (30885) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (13343) | (1467) |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | (13225) | (13225) |
| Non-GAAP Total operating expenses | $183190 | $140418 |

---

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)** | **Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)** | **Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Three Months Ended June 30,** | **Three Months Ended June 30,** |
|  | **2025** | **2024** |
| Cash provided by operating activities | $55725 | $40900 |
| &nbsp;&nbsp;&nbsp;Acquisition of property and equipment | (2060) | (769) |
| &nbsp;&nbsp;&nbsp;Capitalization of software development costs | (5247) | (3066) |
| &nbsp;&nbsp;&nbsp;Employer taxes for executive option exercises | 10833 |  |
| Free cash flow | $59251 | $37065 |
| Operating cash flow margin | 19.0% | 18.4% |
| Free cash flow margin | 20.2% | 16.7% |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)** | **Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)** | **Reconciliation of Gross Profit to Non-GAAP Gross Profit (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Six Months Ended June 30,** | **Six Months Ended June 30,** |
|  | **2025** | **2024** |
| Gross profit | $434008 | $336997 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | 3712 | 4999 |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | 669 | 364 |
| Non-GAAP gross profit | $438389 | $342360 |
| Gross margin | 75.8% | 78.0% |
| Non-GAAP gross margin | 76.5% | 79.2% |

---

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)** | **Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)** | **Reconciliation of Operating Loss to Non-GAAP Operating Income (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Six Months Ended June 30,** | **Six Months Ended June 30,** |
|  | **2025** | **2024** |
| Operating loss | $(55076) | $(36145) |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | 83731 | 69133 |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | 18201 | 4230 |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | 26449 | 26449 |
| Non-GAAP operating income | $73305 | $63667 |
| Operating margin | (9.6)% | (8.4)% |
| Non-GAAP operating margin | 12.8% | 14.7% |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)** | **Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)** | **Reconciliation of Net Loss to Non-GAAP Net Income (Unaudited)** |
| ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** | ***(In Thousands, Except Share and Per Share Data)*** |
| | **Six Months Ended June 30,** | **Six Months Ended June 30,** |
|  | **2025** | **2024** |
| Net loss | $(38370) | $(17824) |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | 83731 | 69133 |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | 18201 | 4230 |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | 26449 | 26449 |
| Non-GAAP net income | $90011 | $81988 |
| Non-GAAP net income per share attributable to Series A and Series B common stockholders: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Basic | $0.32 | $0.31 |
| &nbsp;&nbsp;&nbsp;&nbsp;Diluted | $0.29 | $0.28 |
| Shares used in non-GAAP per share calculations: |  |  |
| &nbsp;&nbsp;&nbsp;&nbsp;Basic | 279674052 | 263319667 |
| &nbsp;&nbsp;&nbsp;&nbsp;Diluted | 305291843 | 295680113 |

---

------

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)** | **Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)** | **Reconciliation of Operating Expenses to Non-GAAP Expenses (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Six Months Ended June 30,** | **Six Months Ended June 30,** |
|  | **2025** | **2024** |
| Selling and marketing | $250159 | $186359 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (26426) | (21459) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (2250) | (1118) |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | (26449) | (26449) |
| Non-GAAP Selling and marketing | $195034 | $137333 |
| Research and development | $141808 | $111832 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (34831) | (26174) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (3225) | (1952) |
| Non-GAAP Research and development | $103752 | $83706 |
| General and administrative | $97117 | $74951 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (18762) | (16501) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (12057) | (796) |
| Non-GAAP General and administrative | $66298 | $57654 |
| Total operating expenses | $489084 | $373142 |
| &nbsp;&nbsp;&nbsp;Stock-based compensation | (80019) | (64134) |
| &nbsp;&nbsp;&nbsp;Employer payroll tax on employee stock transactions | (17532) | (3866) |
| &nbsp;&nbsp;&nbsp;Amortization of prepaid marketing | (26449) | (26449) |
| Non-GAAP Total operating expenses | $365084 | $278693 |

---

---

| | | |
|:---|:---|:---|
| **Klaviyo, Inc.** | **Klaviyo, Inc.** | **Klaviyo, Inc.** |
| **Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)** | **Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)** | **Reconciliation of Operating Cash Flow to Free Cash Flow (Unaudited)** |
| ***(In Thousands)*** | ***(In Thousands)*** | ***(In Thousands)*** |
| | **Six Months Ended June 30,** | **Six Months Ended June 30,** |
|  | **2025** | **2024** |
| Cash provided by operating activities | $70087 | $67082 |
| &nbsp;&nbsp;&nbsp;Acquisition of property and equipment | (4745) | (2028) |
| &nbsp;&nbsp;&nbsp;Capitalization of software development costs | (10303) | (5032) |
| &nbsp;&nbsp;&nbsp;Employer taxes for executive option exercises | 10833 |  |
| Free cash flow | $65872 | $60022 |
| Operating cash flow margin | 12.2% | 15.5% |
| Free cash flow margin | 11.5% | 13.9% |

---

<br>