Fastly, Inc.

Net Gain on Debt Extinguishment relates to net gain on the partial repurchase of our outstanding convertible debt.

SEC original ↗Fastly, Inc. — Presentation / slide deck (8-K exhibit)EX-99Aug 5, 2026

Non-GAAP gross profit, non-GAAP gross margin, non-GAAP operating income (loss), non-GAAP net income (loss) and non-GAAP basic and diluted net income (loss) per common share, non-GAAP research and development, non-GAAP sales and marketing, and non-GAAP general and administrative differ from GAAP in that they exclude stock-based compensation expense and related employer payroll taxes, amortization of capitalized stock-based compensation - cost of revenue , amortization of acquired intangible assets, executive transition costs, and amortization of debt discount and issuance costs.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Adjusted EBITDA excludes stock-based compensation expense and related employer payroll taxes, amortization of capitalized stock-based compensation - cost of revenue, gain on modification of lease, depreciation and other amortization expenses, amortization of acquired intangible assets, impairment expense, executive transition costs, interest income, interest expense, including amortization of debt discount and issuance costs, other expense (income), net, and income taxes.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Amortization of Debt Discount and Issuance Costs consists primarily of amortization expense related to our debt obligations.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Capital Expenditures consists of cash used for purchases of property and equipment, net of proceeds from sale of property and equipment, capitalized internal-use software and payments on finance lease obligations, as reflected in our statement of cash flows.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Interest Expense consists primarily of interest expense related to our debt instruments, including amortization of debt discount and issuance costs.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Our platform strategy is driving business momentum, giving us the confidence to raise our full-year outlook.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Second Quarter Business and Product Highlights Announced new research showing how rapidly growing AI traffic is reshaping the internet, growing 6.5x faster than human traffic this year, and why organizations need new strategies to manage machine traffic.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Management considers non-GAAP free cash flow to be a profitability and liquidity measure that provides useful information to management and investors about the amount of cash generated by the business that can possibly be used for investing in Fastly's business and strengthening its balance sheet, but it is not intended to represent the residual cash flow available for discretionary expenditures.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

3 We calculate LTM Net Retention Rate by dividing the total customer revenue for the prior twelve-month period ( prior 12-month period ) ending at the beginning of the last twelve-month period ( LTM period ) minus revenue contraction due to billing decreases or customer churn, plus revenue expansion due to billing increases during the LTM period from the same customers by the total prior 12-month period revenue.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

We calculate LTM Net Retention Rate by dividing the total customer revenue for the prior twelve-month period ( prior 12-month period ) ending at the beginning of the last twelve-month period ( LTM period ) minus revenue contraction due to billing decreases or customer churn, plus revenue expansion due to billing increases during the LTM period from the same customers by the total prior 12-month period revenue.

SEC original ↗Fastly, Inc. — Presentation / slide deck (8-K exhibit)EX-99Aug 5, 2026

Third Quarter and Full Year 2026 Guidance Q3 2026 Full Year 2026 Total Revenue (millions) $184.0 - $190.0 $732.0 - $746.0 Non-GAAP Operating Income (millions) $20.0 - $24.0 $88.0 - $96.0 Non-GAAP Net Income per share (4)(5) $0.11 - $0.13 $0.50 - $0.54 A reconciliation of non-GAAP guidance measures to corresponding GAAP measures is not available on a forward-looking basis without unreasonable effort due to the uncertainty of expenses that may be incurred in the future and cannot be reasonably determined or predicted at this time, although it is important to note that these factors could be material to Fastly s future GAAP financial results.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

Forward-looking statements may involve known and unknown risks, uncertainties, and other factors that may cause our actual results, performance, or achievements to be materially different from those expressed or implied by the forward-looking statements.

SEC original ↗Fastly, Inc. — Earnings release (8-K exhibit)EX-99Aug 5, 2026

A reconciliation of non-GAAP guidance measures to corresponding GAAP measures is not available on a forward-looking basis without unreasonable effort due to the uncertainty of expenses that may be incurred in the future and cannot be reasonably determined or predicted at this time, although it is important to note that these factors could be material to Fastly s future GAAP financial results.

SEC original ↗Fastly, Inc. — Presentation / slide deck (8-K exhibit)EX-99Aug 5, 2026

Legal Proceedings 42 Item 1A.

SEC original ↗Fastly, Inc. — 10-Q Quarterly report10-QAug 5, 2026

Exhibits 85 Signatures 86 2 SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the Securities Act ), and Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act ), about us and our industry that involve substantial risks and uncertainties.

SEC original ↗Fastly, Inc. — 10-Q Quarterly report10-QAug 5, 2026

Aside from the Company s operating lease commitments, including its colocation operating commitments, which have been disclosed in Note 6 Leases, the minimum future commitments related to the Company's purchase commitments as of June 30, 2026 were as follows: Total Purchase Commitments Remainder of 2026 $ 33,092 2027 46,395 2028 14,177 2029 371 2030 108 Thereafter 8 Total $ 94,151 Legal Matters From time to time, the Company has been and may be subject to legal proceedings and claims.

SEC original ↗Fastly, Inc. — 10-Q Quarterly report10-QAug 5, 2026