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AI growth, cash strength and wider loss in PubMatic (NASDAQ: PUBM) Q1 2026

Filing Impact
(High)
Filing Sentiment
(Neutral)
Form Type
8-K

Rhea-AI Filing Summary

PubMatic, Inc. reported first quarter 2026 revenue of $62.6 million, slightly below the prior year’s $63.8 million, while GAAP net loss widened to $12.5 million, or $0.27 per diluted share. Adjusted EBITDA declined to $2.6 million, a 4% margin, from $8.5 million and a 13% margin a year earlier.

The company highlighted strong cash generation and shareholder returns, with $17.3 million in net cash provided by operating activities, free cash flow of $10.7 million, and 1.0 million shares repurchased in the quarter, equal to 2.1% of fully diluted shares as of March 31, 2026. Management emphasized rapid adoption of its AI-powered AgenticOS platform, citing over 1,000 AI-powered deals and more than 30 fully autonomous campaigns to date, and guided second quarter 2026 revenue to $68–$70 million with adjusted EBITDA of $8.0–$10.0 million.

Positive

  • None.

Negative

  • None.

Insights

AI traction and cash flow are strong, but profitability weakened.

PubMatic delivered Q1 2026 revenue of $62.6M, down modestly year over year, while GAAP net loss increased to $12.5M. Adjusted EBITDA fell to $2.6M (4% margin), signaling near‑term margin pressure despite exceeding internal guidance.

Operationally, the business generated $17.3M in operating cash and $10.7M in free cash flow, and ended the quarter with $144.9M in cash and no debt. The company has repurchased 13.5 million shares cumulatively for $189.9M, including 1.0 million shares in Q1 2026.

Management stresses AI as a key growth driver, citing over 1,000 AI-powered deals and more than 30 autonomous campaigns, plus strong growth in emerging revenues and CTV. Guidance for Q2 2026 calls for revenue of $68M–$70M and adjusted EBITDA of $8.0M–$10.0M. Overall, the update mixes weaker current profitability with a constructive outlook anchored on AI adoption.

Item 2.02 Results of Operations and Financial Condition Financial
Disclosure of earnings results, typically an earnings press release or preliminary financials.
Item 9.01 Financial Statements and Exhibits Exhibits
Financial statements, pro forma financial information, and exhibit attachments filed with this report.
Q1 2026 Revenue $62.6 million Revenue in the first quarter of 2026 versus $63.8 million in 2025
Q1 2026 GAAP net loss $12.5 million Net loss for the quarter with (20)% margin, or $(0.27) per share
Q1 2026 Adjusted EBITDA $2.6 million Adjusted EBITDA in Q1 2026, a 4% margin, down from $8.5 million
Operating cash flow $17.3 million Net cash provided by operating activities in Q1 2026, up from $15.6 million
Free cash flow $10.7 million Free cash flow for Q1 2026, versus $7.3 million a year earlier
Share repurchases Q1 2026 1.0 million shares Shares repurchased in Q1 2026, 2.1% of fully diluted shares as of March 31, 2026
Cash and cash equivalents $144.9 million Cash and cash equivalents as of March 31, 2026, with no debt
Q2 2026 revenue guidance $68–$70 million Projected revenue range for the second quarter of 2026
Adjusted EBITDA financial
"Adjusted EBITDA was $2.6 million, or 4% margin, compared to $8.5 million"
Adjusted EBITDA is a way companies measure how much money they make from their core operations, like running a business, by removing certain costs or income that aren’t part of regular business activities. It helps investors see how well a company is doing without distractions from unusual expenses or gains, making it easier to compare companies or track performance over time.
free cash flow financial
"We define non-GAAP free cash flow as net cash provided by operating activities reduced by purchases"
Free cash flow is the amount of money a company has left over after paying all its expenses and investing in its business, like buying equipment or updating facilities. It shows how much cash is available to reward shareholders, pay down debt, or save for future growth. This helps investors understand if a company is financially healthy and able to grow.
AgenticOS technical
"1,000+ AI-powered deals on PubMatic AgenticOS; 20+ AI agents available on AgenticOS"
Supply Path Optimization financial
"Supply Path Optimization represented over 56% of total activity on our platform in Q1 2026"
Supply path optimization is the process of reviewing and simplifying the chain of middlemen between a buyer and a supplier so goods, services or ad inventory flow through fewer, clearer steps. For investors it matters because a shorter, more transparent path can lower costs, reduce fraud or compliance risk, and improve margins and reliability—similar to buying directly from a farmer instead of through several distributors.
non-GAAP net loss financial
"Non-GAAP net loss was $(5.4) million, or $(0.11) per non-GAAP diluted share"
Revenue $62.6 million -$1.2 million YoY
GAAP net loss $12.5 million wider than $9.5 million YoY
Adjusted EBITDA $2.6 million (4% margin) down from $8.5 million (13% margin)
Non-GAAP net loss $5.4 million vs. $1.8 million a year earlier
Operating cash flow $17.3 million up from $15.6 million YoY
Guidance

For Q2 2026, revenue is expected between $68 million and $70 million and adjusted EBITDA between $8.0 million and $10.0 million, assuming stable macroeconomic and geopolitical conditions.

0001422930FALSE00014229302026-05-072026-05-07
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): May 7, 2026
PubMatic, Inc.
(Exact Name of Registrant as Specified in Charter)
Delaware
001-39748
20-5863224
(State or other jurisdiction
of Incorporation)
(Commission
File Number)
(I.R.S. Employer
Identification Number)
N/A
(Address of Principal Executive Offices) (Zip Code)
N/A
(Registrant's telephone number, including area code)
N/A
(Former name or former address, if changed since last report)
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:
Title of each class
Trading Symbol(s)
Name of each exchange on which registered
Class A Common Stock, par value $0.0001 per sharePUBMThe Nasdaq Global Market
Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).
Emerging growth company
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 May 7, 2026, PubMatic, Inc. (the “Company”) issued a press release announcing its financial results for the fiscal quarter ended March 31, 2026. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.
The information furnished with this Item 2.02, including Exhibit 99.1, 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 into any other filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing.
The Company is making reference to non-GAAP financial information in the press release. A reconciliation of GAAP to non-GAAP results is provided in the attached Exhibit 99.1 press release.
The Company announces material information to the public through a variety of means, including filings with the Securities and Exchange Commission, press releases, public conference calls, and the Company’s investor relations website (https://investors.pubmatic.com) as a means of disclosing material non-public information and for complying with its disclosure obligations under Regulation FD.
Item 9.01.     Financial Statements and Exhibits.
(d) Exhibits.
Exhibit No.Description
99.1
Press Release of the Company, dated May 7, 2026.
104Cover Page Interactive Data File (embedded within the inline XBRL document).



SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
PubMatic, Inc.
Date: May 7, 2026
By:/s/ Steven Pantelick
Steven Pantelick
Chief Financial Officer
EXHIBIT 99.1
PubMatic Announces First Quarter 2026 Financial Results

Delivered revenue and adjusted EBITDA ahead of guidance;
1,000+ AI-powered deals on PubMatic AgenticOS;
20+ AI agents available on AgenticOS, reduces operational workflows to minutes;
Net cash generated from operations was $17.3 million, up 11% over Q1 2025;
Repurchased 1.0 million shares in Q1 2026, representing 2.1% of fully diluted shares1 as of March 31, 2026.
NO-HEADQUARTERS/REDWOOD CITY, Calif., May 7, 2026 (GLOBE NEWSWIRE) -- PubMatic, Inc. (Nasdaq: PUBM), the leading AI-powered ad tech company delivering digital advertising performance, today reported financial results for the quarter ended March 31, 2026.

“We delivered an exceptional first quarter, exceeding guidance on both revenue and adjusted EBITDA. Adoption of our AI capabilities continues to accelerate, with more than 20 agents now embedded across our platform and fully autonomous campaigns scaling globally. Importantly, the repeat engagement we’re seeing from customers underscores that AgenticOS is simplifying the ecosystem and redefining how value is created,” said Rajeev Goel, co-founder and CEO at PubMatic. “Each additional campaign compounds our data advantage, delivers measurable performance, and accelerates our underlying growth. As an early leader in AI, our multi-year investments are driving new revenue streams, expanding operating leverage, and strengthening our competitive position.”

First Quarter 2026 Financial Highlights
Revenue in the first quarter of 2026 was $62.6 million, compared to $63.8 million in the same period of 2025;
GAAP net loss was $(12.5) million with a margin of (20)%, or $(0.27) per diluted share in the first quarter, compared to GAAP net loss of $(9.5) million with a margin of (15)%, or $(0.20) per diluted share in the same period of 2025;
Adjusted EBITDA was $2.6 million, or 4% margin, compared to $8.5 million, or 13% margin in the same period of 2025;
Non-GAAP net loss was $(5.4) million, or $(0.11) per non-GAAP diluted share in the first quarter, compared to non-GAAP net loss of $(1.8) million, or $(0.04) per non-GAAP diluted share in the same period of 2025;
Net cash provided by operating activities was $17.3 million, an increase over $15.6 million in the same period of 2025;
Ended the quarter with total cash and cash equivalents of $144.9 million with no debt, and
Through March 31, 2026, used $189.9 million in cash to repurchase 13.5 million shares of Class A common stock with $85.1 million available from the 2023 Repurchase Program.
The section titled “Non-GAAP Financial Measures” below describes our usage of non-GAAP financial measures. Reconciliations between historical GAAP and non-GAAP information are contained at the end of this press release following the accompanying financial data.

1 Fully diluted shares include common shares outstanding as of March 31, 2026 plus dilutive securities related to employee stock awards under the treasury stock method, calculated as if the Company were in a net income position.

“Our first-quarter results exceeded expectations on both revenue and profitability, reflecting the breadth and strength of our diversified platform. Excluding the legacy DSP referenced in mid-2025, our underlying business grew 13% year-over-year and represented 83% of total revenues,” said Steve Pantelick, CFO at PubMatic. “We also delivered our 40th consecutive quarter of positive adjusted EBITDA, highlighting the durability of our model, ongoing productivity gains, and expense discipline. AI is an increasingly important financial lever for PubMatic, powering revenue growth, expanding margins, and improving efficiency across the business. These benefits compound as adoption scales. We expect to return to double-digit revenue growth in the second half of 2026, with corresponding margin expansion.”

Business Highlights

AgenticOS Adoption Drives Momentum
Over 1,000 AI-powered deals transacted to date, which have generated millions in publisher monetization.
Since launching in January 2026, PubMatic has launched more than 30 fully autonomous, end-to-end campaigns globally. Notably, every participating advertiser has returned to run additional agentic campaigns, reinforcing the strength of performance and operational efficiency.
PubMatic and the Untapped Growth Collective partnered to give independent agencies direct access to AgenticOS, enabling custom buyer agents to access premium inventory, advanced data and GPU-powered optimization. This integration reduces costs and accelerates setup, bringing enterprise AI capabilities to independents.
PubMatic and Amnet launched the first Agentic advertising campaign in France, using the Claude LLM to eliminate manual steps. For client INTERBEV, the autonomous workflow used natural language prompts and cut setup time by 80%.
PubMatic and Abovo Maxlead launched one of the first Agentic AI advertising campaigns in the Netherlands, integrating Abovo’s Mediavision AI with PubMatic’s AgenticOS to optimize CTV. The campaign accelerated time to activation and shifted more spend to working media.

Top Global Commerce Media Partners Added
Integrated with Walmart Connect Select as a preferred supply partner, delivering curated, high-performing CTV inventory to drives stronger engagement, higher conversion rates, and more efficient media spend to its buyers.
Expanded partnership with PayPal Ads to integrate PayPal Ads ID, a deterministic identity solution built on verified PayPal and Venmo accounts, improving match rates, cross-device accuracy, and closed-loop attribution for advertisers.

New Partnerships Expand Scale and Data Integrations
Expanded partnership with Amazon DSP’s Dynamic Traffic Engine (DTE), to optimize supply path routing on both sides of the transaction, driving up to 10% CPM lift for publishers and more efficient media delivery for advertisers.
Integrated Unity LevelPlay into PubMatic’s OpenWrap SDK. PubMatic provides direct, transparent access to the three largest mobile mediation platforms, representing over 90% of SDK inventories.
Integrated with AdRoll — the first DSP on PubMatic's platform to connect via Model Context Protocol — enabling AI agents on both the demand and supply side to communicate directly, diagnose and resolve issues within minutes.


New AI-Powered Solutions Drive Performance and Streamline Omnichannel Workflows
Integrated Creative Engagement Suite into AgenticOS, giving advertisers like Horizon Media unified access to advanced formats like pause ads and shoppable units alongside agentic optimization across CTV, mobile, and premium inventory like Sling TV.

Diversified revenue mix and expanded reach on the buy side
Strength in CTV was led by the Americas, where revenue grew 13% year over year, and represented approximately 80% of total CTV revenue. Excluding the legacy DSP buyer, global CTV revenue grew 18% year-over-year.
Q1 2026 revenue from mobile app grew 25%+ year-over-year.
Emerging revenues2 in Q1 2026 grew 80%+ year over year and represented approximately 14% of total revenues in the quarter, which includes revenue from newly launched AI solutions.
Ad spend from Activate grew more than 3X over Q1 2025, as buyers and publishers prioritized performance, control and transparency.
Ad spend from mid-market focused DSPs grew over 20% year-over-year in Q1 2026.
Supply Path Optimization represented over 56% of total activity on our platform in Q1 2026.

Operating priorities drove profitable growth
Infrastructure optimization initiatives and investments drove nearly 94.2 trillion impressions processed in Q1 2026, an increase of 26% over Q1 2025.
Cost of revenue per million impressions processed decreased 20% on a trailing twelve month period, as compared to the prior period.

Financial Outlook
Our outlook assumes that general market conditions do not significantly deteriorate as it relates to current macroeconomic and geopolitical conditions.
For the second quarter of 2026, we expect the following:
Revenue to be in the range of $68 million to $70 million, inclusive of an impact from one of our top DSP buyers.
Adjusted EBITDA to be in the range of $8.0 million to $10.0 million. Adjusted EBITDA expectation assumes a negative foreign currency exchange impact predominantly from Euro and Pound Sterling.

Although we provide guidance for adjusted EBITDA, we are not able to provide guidance for net income (loss), the most directly comparable GAAP measure. Certain elements of the composition of GAAP net income (loss), including stock-based compensation expenses, are not predictable, making it impractical for us to provide guidance on net income or to reconcile our adjusted EBITDA guidance to net income without unreasonable efforts. For the same reason, we are unable to address the probable significance of the unavailable information.
Conference Call and Webcast details
PubMatic will host a conference call to discuss its financial results on Thursday, May 7, 2026 at 1:30 p.m. Pacific Time (4:30 p.m. Eastern Time). A live webcast of the call can be accessed from PubMatic’s Investor Relations website at https://investors.pubmatic.com. An archived version of the webcast will be available from the same website after the call.
2 Emerging revenue includes Activate, Commerce Media, Connect and AI Solutions.

Non-GAAP Financial Measures
In addition to our results determined in accordance with U.S. generally accepted accounting principles (GAAP), including, in particular operating loss, net cash provided by operating activities, and net loss, we believe that adjusted EBITDA, adjusted EBITDA margin, non-GAAP net income, non-GAAP earnings per share and free cash flow, each a non-GAAP measure, are useful in evaluating our operating performance. We define adjusted EBITDA as net loss adjusted for stock-based compensation expense, depreciation and amortization, litigation related expenses, interest income, and benefit from income taxes. Adjusted EBITDA margin represents adjusted EBITDA calculated as a percentage of revenue. We define non-GAAP net income as net loss adjusted for stock-based compensation expense, litigation related expenses, and adjustments for income taxes. We define non-GAAP free cash flow as net cash provided by operating activities reduced by purchases of property and equipment and capitalized software development costs.
In addition to operating loss and net loss, we use adjusted EBITDA and non-GAAP net loss as measures of operational efficiency. We believe that these non-GAAP financial measures are useful to investors for period to period comparisons of our business and in understanding and evaluating our operating results for the following reasons:
Adjusted EBITDA and non-GAAP net loss are widely used by investors and securities analysts to measure a company’s operating performance without regard to items such as stock-based compensation expense, depreciation and amortization, litigation related expenses, interest expense, and benefit from income taxes that can vary substantially from company to company depending upon their financing, capital structures and the method by which assets were acquired; and,
Our management uses adjusted EBITDA and non-GAAP net loss in conjunction with GAAP financial measures for planning purposes, including the preparation of our annual operating budget, as a measure of operating performance and the effectiveness of our business strategies and in communications with our board of directors concerning our financial performance; and adjusted EBITDA provides consistency and comparability with our past financial performance, facilitates period-to-period comparisons of operations, and also facilitates comparisons with other peer companies, many of which use similar non-GAAP financial measures to supplement their GAAP results.
Our use of non-GAAP financial measures has limitations as an analytical tool, and you should not consider them in isolation or as a substitute for analysis of our financial results as reported under GAAP. Some of these limitations are as follows:
Adjusted EBITDA does not reflect: (a) changes in, or cash requirements for, our working capital needs; (b) the potentially dilutive impact of stock-based compensation; or (c) tax payments that may represent a reduction in cash available to us;
Although depreciation and amortization expense are non-cash charges, the assets being depreciated and amortized may have to be replaced in the future, and adjusted EBITDA does not reflect cash capital expenditure requirements for such replacements or for new capital expenditure requirements; and
Non-GAAP net loss does not include: (a) the potentially dilutive impact of stock-based compensation; (b) non-ordinary course litigation related expenses; or (c) income tax effects for stock-based compensation
Because of these and other limitations, you should consider adjusted EBITDA and non-GAAP net loss along with other GAAP-based financial performance measures, including net income and our GAAP financial results.

Forward Looking Statements
This press release contains “forward-looking statements” regarding our future business expectations, including our guidance relating to our revenue and adjusted EBITDA for the second quarter of 2026, our expectations regarding our adjusted EBITDA, free cash flow, capital expenditures, future adoption and deployment of our AI-enabled products, future market growth, and our long-term revenue growth. These forward-looking statements are based on our current expectations and assumptions regarding our business, the economy and other future conditions and may differ materially from actual results due to a variety of factors including: our dependency on the overall demand for advertising and the channels we rely on; our existing customers not expanding their usage of our platform, or our failure to attract new publishers and buyers; our ability to maintain and expand access to spend from buyers and valuable ad impressions from publishers; the rejection of the use of digital advertising by consumers through opt-in, opt-out or ad-blocking technologies or other means; our failure to innovate and develop new solutions that are adopted by publishers; geopolitical tensions and uncertainty, including the conflicts in Ukraine and the Middle East, and the related measures taken in response by the global community and disruptions to the international supply chain and global commerce; the impacts of inflation and tariffs as well as fiscal tightening; changes currency exchange environments and continuing volatility in global capital markets; volatile interest rates; public health crises, including the resulting global economic uncertainty; limitations imposed on our collection, use or disclosure of data about advertisements, including as it may impact our use of Artificial Intelligence and additional AI laws and regulations are enacted globally; the lack of similar or better alternatives to the use of third-party cookies, mobile device IDs or other tracking technologies if such uses are restricted; any failure to scale our platform infrastructure to support anticipated growth and transaction volume; liabilities or fines due to publishers, buyers, and data providers not obtaining consents from consumers for us to process their personal data; any failure to comply with laws and regulations related to data privacy, data protection, information security, and consumer protection; and our ability to manage our growth. Moreover, we operate in a competitive and rapidly changing market, and new risks may emerge from time to time. For more information about risks and uncertainties associated with our business, please refer to the “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Risk Factors” sections of our SEC filings, including but not limited to, our annual report on Form 10-K and quarterly reports on From 10-Q, copies of are available on our investor relations website at https://investors.pubmatic.com and on the SEC website at www.sec.gov. Additional information will also be set forth in our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026. All information in this press release is as of May 7, 2026. We undertake no obligation to update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by law.
About PubMatic
PubMatic is the leading AI-powered ad tech company delivering digital advertising performance. Through an intelligent, unified platform that connects buyers, publishers, data partners, and commerce media networks, PubMatic delivers superior performance with great transparency, control, and efficiency. Since 2006, PubMatic has pioneered major advances in programmatic advertising, from enabling the first OpenRTB transactions to embedding AI-driven optimization and privacy-focused innovation across its platform. With omnichannel scale, proven reliability, and a track record of continuous innovation, PubMatic is building a more intelligent, profitable, and sustainable open internet. Built to Connect. Powered to Perform.
Investors:
investors@pubmatic.com
Press Contact:
Purpose Worldwide
PubMatic@purposenorthamerica.com


CONDENSED CONSOLIDATED BALANCE SHEETS
(In thousands)
(unaudited)
March 31,
2026
December 31,
2025
ASSETS
Current assets
Cash and cash equivalents$144,876 $145,518 
Accounts receivable, net336,904 358,240 
Prepaid expenses and other current assets22,397 18,889 
Total current assets504,177 522,647 
Property, equipment and software, net50,139 52,657 
Operating lease right-of-use assets36,267 38,149 
Acquisition-related intangible assets, net2,309 2,704 
Goodwill29,577 29,577 
Deferred tax assets32,409 30,986 
Other assets, non-current4,563 3,475 
TOTAL ASSETS$659,441 $680,195 
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities
Accounts payable$342,644 $343,619 
Accrued liabilities18,616 25,278 
Operating lease liabilities, current7,601 6,953 
Total current liabilities368,861 375,850 
Operating lease liabilities, non-current34,779 36,910 
Other liabilities, non-current4,801 4,846 
TOTAL LIABILITIES408,441 417,606 
Stockholders' Equity
Common stock
Treasury stock(202,296)(193,471)
Additional paid-in capital330,962 321,062 
Accumulated other comprehensive income (loss)(86)68 
Retained earnings122,413 134,923 
TOTAL STOCKHOLDERS’ EQUITY251,000 262,589 
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY$659,441 $680,195 
    

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(In thousands, except per share data)
(unaudited)
Three Months Ended March 31,
20262025
Revenue$62,567 $63,825 
Cost of revenue(1)
26,094 25,588 
Gross profit36,473 38,237 
Operating expenses:(1)
Technology and development7,986 8,772 
Sales and marketing28,965 26,799 
General and administrative
14,795 14,569 
Total operating expenses51,746 50,140 
Operating loss(15,273)(11,903)
Total other income, net162 579 
Loss before income taxes(15,111)(11,324)
Benefit from income taxes(2,601)(1,838)
Net loss$(12,510)$(9,486)
Net loss per share attributable to common stockholders:
Basic$(0.27)$(0.20)
Diluted$(0.27)$(0.20)
Weighted-average shares used to compute net loss per share attributable to common stockholders:
Basic47,120 48,346 
Diluted47,120 48,346 

(1)Stock-based compensation expense includes the following:
STOCK BASED COMPENSATION EXPENSE
(In thousands)
(unaudited)
Three Months Ended March 31,
20262025
Cost of revenue$384$474
Technology and development1,0291,585
Sales and marketing3,0573,463
General and administrative4,0184,176
Total stock-based compensation$8,488$9,698



CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS
(In thousands)
(unaudited)
Three Months Ended March 31,
20262025
OPERATING ACTIVITIES:
Net loss$(12,510)$(9,486)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization9,988 11,676 
Stock-based compensation8,488 9,698 
Deferred income taxes(1,423)(4,754)
Accretion of discount on marketable securities— (454)
Non-cash lease expense1,840 1,928 
Other(676)(223)
Changes in operating assets and liabilities:
Accounts receivable21,335 75,691 
Prepaid expenses and other current assets4,082 5,681 
Accounts payable(997)(62,578)
Accrued liabilities(11,382)(11,287)
Operating lease liabilities(1,444)(590)
Other liabilities, non-current(6)319 
Net cash provided by operating activities17,295 15,621 
INVESTING ACTIVITIES:
Purchases of and deposits on property and equipment(11)(1,441)
Capitalized software development costs(6,579)(6,880)
Purchases of marketable securities— (15,307)
Proceeds from maturities of marketable securities— 13,559 
Purchase of equity investment
(3,000)— 
Net cash used in investing activities(9,590)(10,069)
FINANCING ACTIVITIES:
Proceeds from exercise of stock options477 563 
Principal payments on finance lease obligations(36)(35)
Payments to acquire treasury stock(8,500)(5,000)
Net cash used in financing activities(8,059)(4,472)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS(354)1,080 
Effect of foreign currency on cash(288)279 
CASH AND CASH EQUIVALENTS - Beginning of year145,518 100,452 
CASH AND CASH EQUIVALENTS - End of year$144,876 $101,811 

RECONCILIATION OF GAAP NET LOSS TO NON-GAAP ADJUSTED EBITDA AND NON-GAAP NET LOSS
(In thousands, except per share amounts)
(unaudited)
Three Months Ended March 31,
20262025
Reconciliation of net loss:
Net loss$(12,510)$(9,486)
Add back (deduct):
Stock-based compensation8,4889,698
Depreciation and amortization9,98811,676
Litigation related expenses(2)
438 — 
Interest income(1,215)(1,593)
Benefit from income taxes(2,601)(1,838)
Adjusted EBITDA$2,588$8,457
Revenue
$62,567 $63,825
Adjusted EBITDA margin
4%13%
Three Months Ended March 31,
20262025
Reconciliation of net loss per share:
Net loss$(12,510)$(9,486)
Add back (deduct):
Stock-based compensation8,4889,698 
Litigation related expenses(2)
438 — 
Adjustment for income taxes(1,831)(2,055)
Non-GAAP net loss$(5,415)$(1,843)
GAAP diluted EPS$(0.27)$(0.20)
Non-GAAP diluted EPS$(0.11)$(0.04)
GAAP weighted average shares outstanding—diluted47,12048,346
Non-GAAP weighted average shares outstanding—diluted47,12048,346
(2)Litigation related expenses represents external legal fees and other expenses, net of insurance recoveries, associated with pending litigation that arose outside of the ordinary course of business. These costs related to a discrete matter, and are not representative of our underlying operating performance. We do not adjust for legal expenses incurred in our ordinary course of business.
Reported GAAP and Non-GAAP diluted loss per share for the three months ended March 31, 2026 and 2025 were calculated using basic share count.


SUPPLEMENTAL CASH FLOW INFORMATION
COMPUTATION OF FREE CASH FLOW, A NON-GAAP MEASURE
(In thousands)
(unaudited)
Three Months Ended March 31,
20262025
Reconciliation of cash provided by operating activities:
Net cash provided by operating activities$17,295 $15,621 
Less: Purchases of property and equipment(11)(1,441)
Less: Capitalized software development costs(6,579)(6,880)
Free cash flow$10,705 $7,300 


FAQ

How did PubMatic (PUBM) perform financially in Q1 2026?

PubMatic generated $62.6 million in revenue in Q1 2026, slightly below $63.8 million a year earlier. GAAP net loss was $12.5 million, or $0.27 per diluted share, while adjusted EBITDA was $2.6 million, representing a 4% margin compared with 13% a year ago.

What cash flow and liquidity did PubMatic (PUBM) report for Q1 2026?

PubMatic reported net cash provided by operating activities of $17.3 million and free cash flow of $10.7 million in Q1 2026. The company ended the quarter with $144.9 million in cash and cash equivalents, no debt, and continued investing in property, software development, and an equity investment.

How much stock did PubMatic (PUBM) repurchase in Q1 2026?

In Q1 2026, PubMatic repurchased 1.0 million shares of Class A common stock, representing 2.1% of fully diluted shares as of March 31, 2026. Cumulatively, it has used $189.9 million in cash to repurchase 13.5 million shares under its 2023 Repurchase Program, with $85.1 million remaining.

What guidance did PubMatic (PUBM) provide for Q2 2026?

For the second quarter of 2026, PubMatic expects revenue between $68 million and $70 million, inclusive of an impact from one top DSP buyer. Adjusted EBITDA is projected between $8.0 million and $10.0 million, with guidance reflecting anticipated foreign currency headwinds from the euro and pound sterling.

How is AI, including AgenticOS, contributing to PubMatic’s (PUBM) business?

PubMatic highlighted rapid adoption of its AI-powered AgenticOS platform, noting over 1,000 AI-powered deals and more than 30 fully autonomous campaigns launched since January 2026. Management said every participating advertiser has returned, and emerging revenues, including AI solutions, grew over 80% year over year in Q1 2026.

What were PubMatic’s (PUBM) key profitability metrics in Q1 2026?

GAAP net loss was $12.5 million with a margin of (20)%, compared with a $9.5 million loss and (15)% margin in 2025. Adjusted EBITDA was $2.6 million, or 4% of revenue, down from $8.5 million and a 13% margin, while non-GAAP net loss was $5.4 million.

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