Exhibit 99.1 Vertex Announces Fourth Quarter and Full Year 2023 Financial Results KING OF PRUSSIA, PA – February 29, 2024: Vertex, Inc. (NASDAQ: VERX) ("Vertex" or the "Company"), a leading global provider of indirect tax solutions, today announced financial results for its fourth quarter and full year ended December 31, 2023. "The Vertex execution engine delivered exceptionally strong financial results in the fourth quarter," stated David DeStefano, Vertex Chief Executive Officer. "Our year-over-year reven ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39413 VERTEX, INC. (Exact Name of Registrant as Specified in its Charter) | Delaware | 23-2081753 | | --- | --- | | (State or other jurisdiction of | (I.R.S. Employer | | incorporation or organizat ...

Vertex, Inc. (NASDAQ:VERX) Q3 2023 Earnings Conference Call November 9, 2023 8:30 AM ET Company Participants Joe Crivelli - Vice President, Investor Relations David DeStefano - President & Chief Executive Officer John Schwab - Chief Financial Officer Conference Call Participants Chris Quintero - Morgan Stanley Matt Stotler - William Blair Joshua Reilly - Needham Steve Enders - Citi Adam Hotchkiss - Goldman Sachs Alex Sklar - Raymond James Pat Walravens - JMP Securities Kyle Aberasturi - BMO Capital Operator ...

% VERTEX® Investor Presentation November 2023 1 Copyright © 2023 Vertex, Inc. All rights reserved. Proprietary and confidential. Disclaimer Forward Looking Statements Any statements made in this presentation that are not statements of historical fact, including statements about our beliefs and expectations, are forward-looking statements and should be evaluated as such. Forward-looking statements include information concerning possible or assumed future results of operations, including descriptions of our b ...

%VERTEX® Investor Presentation August 2023 1 Copyright © 2023 Vertex, Inc. All rights reserved. Proprietary and confidential. Disclaimer Forward Looking Statements Any statements made in this presentation that are not statements of historical fact, including statements about our beliefs and expectations, are forward-looking statements and should be evaluated as such. Forward-looking statements include information concerning possible or assumed future results of operations, including descriptions of our busi ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q | Title of each class | Trading symbol | Name of each exchange on which registered | | --- | --- | --- | | Class A Common Stock, Par Value | VERX | The Nasdaq Stock Market LLC | | $0.001 Per Share | | | (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SEC ...

Financial Data and Key Metrics Changes - Total revenue for Q2 2023 was $139.7 million, representing a 17.1% year-over-year increase, exceeding the upper end of guidance by approximately $2.7 million [31] - Subscription revenues increased by 16.6% to $117.8 million, while services revenues grew by 20.2% to $21.9 million [31] - Annual recurring revenue (ARR) reached $467.7 million, up 17.5% year-over-year [31] - Adjusted EBITDA was $22 million, an increase of $4.2 million year-over-year, aligning with the upper end of guidance [38] - Gross profit was $99.1 million with a gross margin of 70.9%, compared to 70.7% in the same period last year [33] Business Line Data and Key Metrics Changes - Cloud revenue was $51.2 million, up 27.3% from the previous year [33] - Average annual revenue per customer (AARPC) increased to $109,170, up from $104,370 in Q1 2023, reflecting a 16% year-over-year growth [32] Market Data and Key Metrics Changes - The customer base with annual revenues greater than $100,000 grew by 15% year-over-year, indicating success in the enterprise market [8] - The company reported several high-profile wins, including contracts with a leading global semiconductor manufacturer and a major manufacturer of private label food products, contributing to significant ARR growth [12][14] Company Strategy and Development Direction - The company is focused on accelerating global commerce by integrating solutions into major platforms and building trusted partner relationships [9] - Vertex has achieved SAP endorsed app status, enhancing collaboration with SAP's sales and marketing teams [11] - The company is investing in AI technologies to optimize workflows and improve customer experience, viewing AI as a strategic component of their commercial strategy [28][29] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the company's trajectory, citing strong revenue acceleration and profitability in Q2 [43] - The company anticipates continued operating leverage and margin improvement in the second half of the year [48] - Management noted a diversified source of demand drivers, including changes in operating business models and regulatory environments, which support strong performance despite broader economic uncertainties [52][99] Other Important Information - The company ended Q2 with over $41.9 million in unrestricted cash and equivalents, and total bank debt was $48 million [39] - Full-year revenue guidance was increased to a range of $556 million to $562 million, reflecting a 14% growth at the midpoint [41] Q&A Session Summary Question: How has the mix of leads shifted with more deals from Salesforce, Workday, and Microsoft Dynamics? - Management noted an increase in leads overall, with strong motions continuing with SAP and Oracle, viewing the shift as additive to their strategy [46] Question: Why was the adjusted EBITDA margin guidance left unchanged despite a strong quarter? - Management indicated that EBITDA margins are projected to increase notably in Q3 and Q4, with operating leverage expected to improve as the year progresses [48] Question: What factors contributed to strong results despite a deceleration in new implementation work? - Management attributed strong results to diversified demand drivers, including changes in operating models and a heated regulatory environment [52] Question: How is the competitive environment perceived? - Management noted that most competition focuses on price, indicating the differentiated value Vertex provides, with Oracle and SAP being primary competitors [65] Question: What is the outlook for cash generation in the back half of the year? - Management expects stronger cash generation in Q4, traditionally the strongest quarter, with cash collections normalizing following billing delays [68]

Financial Data and Key Metrics Changes - Total revenue for Q1 2023 grew 15.5% year-over-year to $132.8 million, reaching the upper end of quarterly guidance [23] - Annual recurring revenue (ARR) was $446.5 million, up 17.3% year-over-year and 14.3% on an annualized sequential basis [24] - Adjusted EBITDA was $20.2 million, an increase of $1.1 million year-over-year [30] - Gross profit for Q1 was $95.3 million with a gross margin of 71.8%, compared to 70.2% in the same period last year [26] Business Line Data and Key Metrics Changes - Subscription revenues increased 14.3% to $111 million, while average services revenues grew 21.8% to $21.7 million [23] - The managed services business generated recurring service revenues of $7.4 million, up from $6 million in the prior year [25] - Cloud revenue was $48.2 million, up 26% from last year [26] Market Data and Key Metrics Changes - The company reported strong performance in the enterprise market, with a focus on partnerships with Microsoft, Workday, and Salesforce [10] - The services business showed steady growth, reflecting ongoing investments in tax technology by businesses [11] Company Strategy and Development Direction - The company is executing a multi-year growth strategy with focused investments in R&D, go-to-market, customer success, and corporate infrastructure [7] - There is optimism about earning leverage in the second half of 2023 as investments begin to taper off [7] - The company is leveraging intelligent automation to monitor tax code changes and streamline workflows [21] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the ongoing demand for tax transformation solutions due to increasing compliance requirements and audit pressures [8] - The regulatory environment is becoming more complex, which aligns with the company's strategy to provide comprehensive tax solutions [60] - The outlook for the remainder of 2023 is positive, with expectations for revenue and earnings growth [35] Other Important Information - The company ended Q1 with over $68.6 million in unrestricted cash and cash equivalents, and total bank debt was $48.6 million [32] - Guidance for Q2 2023 expects total revenue in the range of $135 million to $137 million, representing 14% year-over-year growth at the midpoint [33] Q&A Session Summary Question: Growth in indirect customer base - Management noted that indirect customers are coming through partners, which helps market to mid-market and downsized customers [39] Question: Performance in international markets - Management reported strong performance in Europe, with a record attendance at their European customer conference and confidence in pipeline activity [40] Question: Progress with large technology partners - Management highlighted strong partnerships with Microsoft, Salesforce, and Workday, which are driving competitive differentiation [43] Question: Demand for managed services - Management indicated that demand is driven by the complexity of tax management and the need for efficiency in tax departments [46] Question: European marketplace laws enforcement - Management confirmed a shift in activity due to increased enforcement of marketplace laws, creating incremental opportunities [50] Question: Gross margin outlook - Management expects continued leverage in gross margin as product and cloud opportunities grow [52] Question: Inorganic growth opportunities - Management is exploring opportunities but remains cautious about valuations in the current environment [54] Question: Customers' willingness to undertake ERP projects - Management has not observed a significant change in momentum for ERP projects despite financial sector challenges [72] Question: Pricing dynamics - Management indicated that pricing increases are being implemented to address inflation and are expected to have a modest impact on revenue [78]

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-39413 VERTEX, INC. (Exact Name of Registrant as Specified in its Charter) | Delaware | 23-2081753 | | --- | --- ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Commission File Number: 333-239644 VERTEX, INC. (Exact Name of Registrant as Specified in its Charter) FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to | Delaware | 23-2081753 | | --- | --- | | ...