Amplitude, Inc.

source: coverage-next-full ticker: AMPL company: Amplitude, Inc. step: 01 title: Business Overview date: 2026-06-14

Step 01 — Business Overview: Amplitude, Inc. (AMPL)

1. Business Description

Amplitude, Inc. is a San Francisco-based software-as-a-service company that operates what it calls an AI Analytics Platform — a purpose-built system for collecting, storing, and analyzing behavioral event data generated by users interacting with digital products. [FACT] The company was founded in 2012 by Spenser Skates (CEO), Curtis Liu (CTO), and Jeffrey Wang, went public via direct listing on Nasdaq on September 28, 2021 (ticker: AMPL), and reported FY2025 revenue of $343.2 million (+15% year-over-year) on a fiscal year ending December 31 [S1].

The company's core platform — historically centered on product analytics — answers the question: who does what, in what sequence, and with what outcome? It ingests user interaction events (clicks, page views, feature activations, conversions, session starts) via client-side and server-side SDKs, stores them in a proprietary behavioral database called the Behavioral Graph, and surfaces the results as funnel analyses, retention charts, user journey maps, cohort comparisons, and AI-generated recommendations. [FACT, S1]

One-sentence value proposition: Amplitude enables product, data, and growth teams to understand exactly how users behave inside their digital products — and to act on those insights through experimentation, personalization, and AI-driven automation — replacing a fragmented set of point tools with a single connected platform. [JUDGMENT]

Amplitude's customer base spans SMB, mid-market, and enterprise, across verticals that include B2B SaaS, fintech, e-commerce, media/streaming, and consumer mobile. [FACT] As of December 31, 2025, the company served 4,797 paying customers, including 27 of the Fortune 100, with 698 customers generating $100,000 or more in annualized recurring revenue (ARR) — representing 78% of total ARR of $366 million [S1, S3].

2. Value-Chain Layer Map

Amplitude occupies the analytics and activation layer in the modern digital product data stack, sitting above the data collection and storage infrastructure and below the decision-execution layer (deployment tooling, CRM, ad platforms). The full stack, from top to bottom, is:

[FACT, S1, S3]

What Amplitude owns vs. what it partners on:

• [FACT] Amplitude owns its behavioral data store (the Behavioral Graph), its analytics computation layer, and all product surface area from ingestion to visualization.
• [FACT] Amplitude does not require customers to route data through its cloud: its warehouse-native integrations allow customers who store data in Snowflake, BigQuery, or Databricks to query behavioral data directly from those environments, avoiding a separate data copy in Amplitude's cloud. This is a strategic architectural choice designed to serve data-mature enterprise buyers.
• [FACT] Amplitude relies on third-party cloud infrastructure (AWS, GCP) for compute and storage for its hosted cloud product. This creates a variable cost relationship with cloud providers that is reflected in cost-of-revenue growth.
• [JUDGMENT] The warehouse-native architectural bet is Amplitude's most significant structural differentiator vs. earlier-generation analytics tools (Mixpanel, legacy Heap) that require a separate data silo. It positions Amplitude to win deals where Snowflake or BigQuery is already the organizational data source of truth.

3. Revenue Model

Primary revenue stream: subscriptions. [FACT] Subscription revenue was approximately 98% of total FY2025 revenue of $343.2 million; professional services (implementation, onboarding) accounted for roughly 2%, or approximately $7 million [S1].

Pricing model: Amplitude uses a tiered SaaS subscription model with four plans (Free, Plus, Growth, Enterprise). Pricing dimensions have evolved:

• [FACT] Historically, pricing was based on event volume (total events tracked per month). This model created risk for Amplitude when customers with high-volume but low-value event implementations churned or downsized.
• [FACT] Amplitude introduced Monthly Tracked User (MTU) and session-based pricing as an alternative metric, designed to better align cost with business value (engaged users) rather than raw instrumentation volume.
• [FACT] Enterprise accounts are custom-priced through direct negotiation, typically on annual or multi-year contracts. Average contract duration extended to 22 months as of Q3 FY2025, up from approximately 18 months in FY2024 [S3].

Land-and-expand mechanics: [FACT] Amplitude's go-to-market is structured as a land-and-expand motion. Customers typically begin with core product analytics (often via a free tier or small initial contract) and expand over subsequent contract cycles by adding Session Replay, Feature Experimentation, Audience Activation, Guides & Surveys, or the Amplitude CDP. As of Q3 FY2025, 70% of ARR came from customers using multiple products, up from an estimated 40–50% two years prior [S3].

Dollar-Based Net Revenue Retention (NRR): [FACT] NRR measures the expansion (upsell + cross-sell) minus contraction and churn from the existing customer base over a trailing 12-month period. Amplitude's NRR hit a trough of 96% in Q2 FY2024 — reflecting the 2022–2024 enterprise software spending retrenchment — and recovered to 104% by Q2 FY2025 and 104% for FY2025 full-year [S1, S3]. An NRR above 100% means existing customers are growing their spend faster than they churn, generating organic revenue growth from the installed base alone.

Remaining Performance Obligations (RPO): [FACT] RPO reached $391.9 million as of Q3 FY2025, up 37% year-over-year — growing materially faster than ARR growth of 16%. This indicates Amplitude is signing longer-duration, larger-value contracts at an accelerating pace, providing forward revenue visibility [S3].

Revenue recognition: Amplitude recognizes subscription revenue ratably over the contract period. This means a large enterprise deal signed in Q4 FY2025 contributes relatively little to FY2025 revenue but will be fully recognized in subsequent periods — creating a lag between bookings momentum and reported revenue [S1].

4. Customer Segmentation

By spend tier:

• [FACT] Enterprise (≥$100K ARR): 698 customers as of December 31, 2025 — up 18% year-over-year from 591. This cohort generates 78% of total ARR ($285M+ of $366M) and is the primary driver of land-and-expand economics [S1].
• [FACT] High-value enterprise (≥$1M ARR): 56 customers as of FY2025, up 33% from 42 in FY2024. These megadeals signal Amplitude's ability to win significant platform-level commitments from large organizations [S1].
• [FACT] SMB/self-serve (<$100K ARR): Remaining ~4,099 customers (4,797 total minus 698 enterprise). These customers are important for top-of-funnel volume but contribute only ~22% of ARR at the blended average.
• [EST] Enterprise accounts ($100K+ ARR) carry an average ACV of approximately $408K ($285M / 698 customers), while the SMB cohort averages approximately $20K per customer — a 20x ACV gap that motivates Amplitude's upmarket push.

By vertical: [FACT] Amplitude's disclosed customer logos span B2B SaaS, fintech/payments, consumer media/streaming, e-commerce, and healthcare (HIPAA-compliant). Notable named customers include Atlassian, NBCUniversal, Under Armour, and Shopify. The company claims coverage of 27 Fortune 100 companies [S1, S3].

By geography: [FACT] United States generated $209.8 million (61%) and International generated $133.4 million (39%) of FY2025 revenue. US revenue grew 17% year-over-year; International grew 12%, suggesting the US enterprise segment is expanding faster than international [S1].

By product maturity cycle: [JUDGMENT] The customer base is bifurcating into (a) legacy single-product analytics accounts that need to be migrated onto multi-product bundles to improve NRR, and (b) new multi-product platform accounts with structurally higher retention. Amplitude's ability to upgrade the former cohort is the central operational challenge of the next 12–24 months.

5. Go-to-Market

Product-Led Growth (PLG): [FACT] Amplitude maintains a free tier (up to a threshold of events/MTUs) that allows product managers, data analysts, and engineers to begin using the platform without budget approval. This drives organic top-of-funnel awareness within prospective customers. The PLG motion is self-serve and does not require direct sales involvement [S1, S3].

Enterprise sales overlay: [FACT] Above the free tier, Amplitude deploys a direct sales force with dedicated account executives for enterprise accounts. Sales and marketing expenses were $188.0 million in FY2025 (54.8% of revenue) — elevated relative to Amplitude's growth rate, reflecting ongoing investment in enterprise sales capacity [S1]. The company targets VP of Product, CPO, CTO, and Chief Data Officer buyers.

Solution partners and technology integrations: [FACT] Amplitude maintains a partner ecosystem of systems integrators, technology partners (Snowflake, Databricks, Salesforce), and analytics consulting firms that assist with implementation and ongoing use. Partner-sourced deals reduce the direct sales cost-per-customer for complex enterprise deployments [S1].

Outcome-based selling: [FACT] A commissioned Forrester Total Economic Impact study cited by management claims a 6-month payback period for Amplitude platform customers. This ROI framework is used as a sales tool to justify premium pricing vs. lower-cost alternatives [S3].

International GTM: [FACT] Amplitude operates seven global offices as of FY2025. International revenue grew 12% in FY2025, slower than US growth of 17%, suggesting current GTM investment is concentrated domestically. No specific international ARR or customer count breakdowns are disclosed by management [S1].

6. Platform Expansion ("Year of the Platform")

In FY2025, CEO Spenser Skates branded the company's strategy as the "Year of the Platform" — explicitly positioning Amplitude as a unified analytics platform rather than a single-use product analytics tool. The strategic thesis is that customers will consolidate 4–6 disconnected point solutions (analytics, session replay, A/B testing, feature flags, surveys, CDP) under one Amplitude instance, generating higher ACV, longer contract terms, and better NRR [S3].

Product inventory as of FY2025:

[FACT, S1, S3]

Multi-product ARR evidence: [FACT] 70% of ARR came from customers using multiple Amplitude products as of Q3 FY2025. Management frames this as the primary evidence that the platform strategy is working. Multi-product customers have materially higher NRR (estimated >110%) vs. single-product customers, though Amplitude does not disclose this split explicitly [S3].

AI acquisitions: [FACT] In 2025, Amplitude completed three acquisitions to accelerate AI capabilities: Command AI (in-product AI assistant), Craffle (AI analytics enhancement), and Anari (AI-powered analytics). These acquisitions contributed to the $10.3M increase in R&D personnel costs in FY2025, partially offset by an $11.8M decrease in SBC expense (prior-year SBC had been elevated due to Command AI acquisition-related acceleration) [S1].

MCP integration: [FACT] Amplitude launched the Amplitude MCP (Model Context Protocol) layer in 2025, designed to expose Amplitude behavioral data to external AI agents and large language models. This positions Amplitude as a data source for AI-powered workflows, extending the platform's relevance into the emerging agentic AI ecosystem [S1].

[JUDGMENT] The platform expansion is the correct strategic direction but carries execution risk: each new product adds implementation complexity for customers, competes with established best-of-breed vendors in its respective category, and may dilute the brand clarity that Amplitude has built in product analytics. The key test over the next 18–24 months is whether multi-product attachment rates translate into sustainably higher NRR (>105%) or whether platform breadth creates implementation fatigue and feature sprawl churn.

7. Key Dependencies and Risks to Model

Third-party cloud infrastructure: [FACT] Amplitude's cost of revenue includes material payments to cloud providers (primarily AWS and GCP) for compute, storage, and data transfer. In FY2025, third-party hosting costs increased $6.0 million year-over-year, the largest single driver of cost-of-revenue growth [S1]. As Session Replay and CDP storage requirements grow, hosting costs could compress gross margins below the current 74% GAAP / 76% non-GAAP level.

Data pipeline and integration dependencies: [FACT] Amplitude's warehouse-native integrations depend on API access and partnership arrangements with Snowflake, Databricks, and Google BigQuery. Changes in these platform vendors' pricing or data-sharing policies could affect the competitiveness of Amplitude's warehouse-native offering [S1, S2].

AI commoditization risk: [JUDGMENT] The most structurally significant long-term risk is the potential for warehouse-native AI query tools (Snowflake Cortex, BigQuery ML, Databricks AI) to replicate enough of Amplitude's analytics GUI functionality that buyers question the value of a standalone analytics layer. This substitution risk is a 3–5 year horizon concern rather than immediate, but it shapes how Amplitude must position its AI-native differentiation [S2].

Free-tier competition: [FACT] Google Analytics 4 + Firebase Analytics offer behavioral tracking at $0 for web and mobile, anchoring price expectations for the SMB and startup segment. PostHog provides an open-source self-hosted alternative with capabilities that now overlap substantially with Amplitude's core product, and has grown to deployments on 5,330+ of the top 1 million websites [S2].

Stock-based compensation (SBC) dilution: [FACT] SBC expense was $92.1 million in FY2025 — equal to 26.8% of total revenue and 36.3% of gross profit. Weighted average diluted shares outstanding grew from 111.4 million in FY2022 to 132.0 million in FY2025, representing 18.5% dilution over three years. At current share repurchase pace ($50M authorized in Q1 FY2025), buybacks are insufficient to offset the pace of new share issuance [S4].

Dual-class share structure: [FACT] AMPL went public via direct listing in September 2021 with a dual-class share structure, concentrating voting control with founders. This reduces minority shareholder influence over capital allocation, M&A, and executive compensation decisions [S1].

NRR recovery fragility: [JUDGMENT] The NRR recovery from 96% (Q2 FY2024) to 104% (FY2025) is encouraging but occurred in a relatively benign macro environment. Enterprise software budgets remain discretionary, and a re-tightening of IT spending — particularly for analytics tools with easily deferrable renewal dates — could reverse the expansion trend. The 2022–2024 NRR trough demonstrated that Amplitude's customer base is not immune to budget retrenchment cycles.

Customer concentration (low but worth noting): [FACT] No single customer accounted for more than 10% of FY2025 revenue [S1]. This is a positive structural attribute — AMPL is not dependent on any single enterprise relationship for a material portion of revenue.

8. Source Index

Step 01 prepared under coverage-next-full protocol. No earnings transcripts used. Data sources: SEC filings, XBRL, investor materials, industry research.

source: coverage-next-full ticker: AMPL company: Amplitude, Inc. step: 04 title: Financial Snapshot date: 2026-06-14

Step 04 — Financial Snapshot: Amplitude, Inc. (AMPL)

1. Statement Quality Assessment

GAAP vs. Non-GAAP Reconciliation

Amplitude, like most high-growth SaaS companies, presents both GAAP and non-GAAP financial results. The key non-GAAP adjustments are:

1. Stock-Based Compensation (SBC): The single largest adjustment. FY2025 SBC was $92.1M, representing 26.8% of revenue. [S3: xbrl_summary.md, §SBC; S2: stockanalysis_summary.md, §Cash Flow] This converts GAAP operating loss of -$96.0M into a non-GAAP operating profit of +$1.2M.
2. Amortization of Intangibles and Capitalized Software: Amplitude capitalizes internal-use software development costs and amortizes acquired intangibles from the Command AI acquisition (completed FY2024). Amortization of capitalized software was approximately $3.4M in FY2025 per the 10-K MD&A. [S1: 10-K FY2025, §Gross Profit commentary]
3. Restructuring Charges: Amplitude undertook workforce reductions from FY2022 through FY2024 as part of its efficiency drive. Restructuring charges are excluded from non-GAAP results.
4. Income Tax Effects: Non-GAAP adjustments include tax effects of the above items (typically modest for a loss-stage company).

Are the Non-GAAP Adjustments Reasonable?

The exclusion of amortization of intangibles and restructuring charges is standard practice and broadly accepted. The SBC exclusion is where the analysis gets more nuanced.

The case for excluding SBC: SBC is a non-cash charge that does not consume cash in the current period. For FCF-centric analysis, OCF already nets out SBC's tax effects, so the cash generation picture is not distorted.

The case against excluding SBC: SBC represents real economic dilution to common shareholders. When Amplitude adds ~132M diluted shares, grants 10–15M RSUs annually, and reports non-GAAP "profitability," the $92M SBC cost is being absorbed by existing shareholders through equity dilution rather than cash outflows. FCF should be analyzed alongside total share count growth to capture the true economics. At 26.8% of revenue, Amplitude's SBC ratio is at the high end of SaaS norms — industry leaders typically target 10–15% of revenue in SBC. This is a valid criticism addressed in detail in Section 5 (Adversarial Research Sweep).

Earnings Quality: FCF vs. GAAP Net Loss

GAAP net loss in FY2025 was -$88.5M while FCF was +$23.5M — a $112M gap. The gap is primarily explained by:

• SBC add-back: +$92.1M to operating cash flow
• Deferred revenue increase (advance billing from customers): net positive to working capital
• D&A: +$9.6M
• Offset by: working capital uses, capitalized software spending

The FCF figure is real cash — but it is substantially inflated relative to true "owner earnings" by the SBC add-back. A shareholder-normalized FCF (subtracting SBC to approximate the true cash cost) would be approximately: $23.5M - $92.1M = -$68.6M in FY2025. This normalized figure better represents the economic reality for long-term shareholders. The gap between reported FCF (+$23.5M) and shareholder-normalized FCF (-$68.6M) is the central tension in evaluating Amplitude's financial health.

2. Income Statement Quality

Revenue Recognition Policy

Amplitude recognizes subscription revenue ratably over the contract term per ASC 606 (revenue recognized over the period in which the performance obligation — platform access — is satisfied). [S1: 10-K FY2025, §Business Model] This means:

• Upfront annual or multi-year bookings do not flow through income immediately; they enter deferred revenue and are recognized pro-rata monthly.
• Revenue is smooth and predictable, not lumpy — a quality signal.
• Reported revenue lags booking acceleration; RPO ($427.4M, growing 31% YoY) provides the forward signal.

Professional services revenue (~2% of total) is recognized upon delivery of implementation milestones, which introduces minimal lumpiness to an otherwise smooth recognition pattern.

Deferred Revenue as a Leading Indicator

Deferred revenue at December 31, 2025 was $121.9M. [S1: 10-K FY2025, §Balance Sheet Highlights] This represents cash already collected for services not yet delivered — a structurally cash-flow-positive characteristic of the SaaS model. Deferred revenue growing in line with ARR growth (+17% YoY) confirms that renewal rates and new bookings are being maintained and that the billing cycle is healthy.

Operating Leverage Trajectory

GAAP operating margin has improved from -44% (FY2021) to -37% (FY2023) to -28% (FY2025). [S2: stockanalysis_summary.md, §Profitability Margins] This trajectory is directionally correct but the pace is modest. Key drivers of margin improvement:

• R&D leverage: R&D spend was flat in dollar terms at $97.6M (FY2024 and FY2025), while revenue grew 15%. R&D as % of revenue fell from 32.6% (FY2024) to 28.4% (FY2025). The flat R&D headcount (~780 employees, down from ~1,100 at peak) and AI-assisted coding (management noted >90% of shipped code is AI-written) have been the primary drivers of this leverage. [S1: 10-K FY2025, §Headcount; S4: consensus.md, §Q1 FY2026 Highlights]
• G&A leverage: G&A declined from 21.3% of revenue (FY2024) to 18.7% (FY2025) as the company grows into its fixed corporate overhead base.
• S&M counter-trend: Sales & Marketing increased 12% in FY2025 to $188M (+$19.7M), still consuming 54.8% of revenue. [S1: 10-K FY2025, §Operating Expenses] This is the primary drag on operating leverage. The incremental S&M investment is consistent with the upmarket enterprise motion but raises questions about sales efficiency (ARR per quota-carrying rep).

3. Balance Sheet Strength

Cash and Liquidity Position

[S1: 10-K FY2025, §Balance Sheet; S2: stockanalysis_summary.md; S3: xbrl_summary.md]

Important context on the cash decline: The $90.6M decline in cash and cash equivalents from FY2024 to FY2025 is partly misleading — it reflects a deliberate shift from cash into marketable securities (+$102.0M increase), not cash outflows. Total liquid assets actually increased slightly ($241.1M → $252.5M), confirming no deterioration in liquidity. [S3: xbrl_summary.md, §Cash and Notes; S1: 10-K FY2025, §Liquidity Commentary]

However, at Q1 FY2026 (March 31, 2026), total liquid assets declined to approximately $181.9M ($86.6M cash + $95.3M ST investments), a reduction of ~$70M from FY2025 year-end. [S2: stockanalysis_summary.md, §Quarterly Balance Sheet] This decline reflects the seasonally weak Q1 FCF (-$13.2M) combined with RSU tax withholding payments and working capital timing. This warrants monitoring in Q2 FY2026 — if liquid assets continue to decline, the company may need to reassess its capital allocation priorities.

Debt Profile

Total debt is essentially zero in economic terms. The $6.9M in "debt" is entirely operating lease obligations (office space). [S2: stockanalysis_summary.md, §Leverage Ratios] There is no bank debt, no convertible notes, and no credit facility drawn. Amplitude was funded exclusively by equity capital (IPO proceeds + pre-IPO venture financing) and has no financial leverage risk.

Stockholders' Equity and Accumulated Deficit

Stockholders' equity was $245.3M at FY2025 year-end, declining steadily from $306.5M at the time of the IPO (FY2021). [S2: stockanalysis_summary.md, §Annual Balance Sheet] The accumulated deficit of -$546.4M reflects the cumulative GAAP net losses since inception. Notably, SBC adds back to APIC even as it flows through the P&L, so equity has not declined as quickly as the net loss trajectory would suggest — the equity value preservation comes from SBC accreting to the balance sheet.

Liquidity Runway

At the current FCF generation rate ($23.5M/year), and with $181.9M in liquid assets (Q1 FY2026), Amplitude has liquidity to sustain operations for several years without additional capital raises. However, the more relevant constraint is whether management can achieve sustained FCF positivity. The Q1 FY2026 FCF of -$13.2M (seasonal) and the revised FY2026 non-GAAP operating income guidance of only $2.5–6.5M suggest the path to material FCF improvement remains uncertain. There is no near-term solvency risk, but the cash burn from SBC (real dilution) and the depletion of liquid assets from IPO proceeds to current levels ($182M from $307M peak in 2021) reflects years of economic losses.

4. Cash Flow Quality

Operating Cash Flow Analysis

[S3: xbrl_summary.md, §Operating Cash Flow; S2: stockanalysis_summary.md, §Annual Cash Flow]

The column "OCF ex-SBC" (Operating Cash Flow minus SBC, the non-cash add-back) illustrates a critical point: on a shareholder-normalized basis, Amplitude has never generated positive operating cash flow. The FCF positive trajectory beginning in FY2023 is entirely a function of the SBC add-back exceeding the operating cash deficit. SBC has consistently been 3-5x the magnitude of reported FCF. This does not mean the business is failing — it means the "profit" is being paid for in equity dilution rather than cash — but investors must be clear-eyed about this distinction.

Deferred Revenue Dynamics

Deferred revenue is a structurally positive working capital item for SaaS. Amplitude bills annually in advance, so new and renewal subscription bookings create immediate cash inflows that are recognized as revenue over the following 12 months. This advance-billing dynamic means OCF tracks ahead of GAAP revenue in periods of growth acceleration. The $121.9M in deferred revenue as of FY2025 year-end [S1: 10-K FY2025, §Balance Sheet] provides a direct forward revenue signal for the next 12 months.

Capital Expenditure Intensity

CapEx was $1.6M in FY2025 — negligible at 0.5% of revenue. [S2: stockanalysis_summary.md, §Annual Cash Flow] This reflects Amplitude's cloud-native, asset-light infrastructure model. The company's primary "capital" investment is in human capital (employees) and cloud hosting costs (which flow through COGS, not CapEx). Company-defined FCF also subtracts capitalized internal-use software development costs of approximately $4.7M in FY2025 (the difference between OCF minus CapEx and disclosed FCF of $23.5M). This is the appropriate definition for a SaaS business — software development costs should be treated as capital expenditure regardless of accounting classification.

5. Adversarial Research Sweep

This section proactively examines the red flags, concerns, and investigative threads that a rigorous independent analyst should pursue before establishing a position.

The May 6, 2026 Guidance Cut and Securities Fraud Investigation

On May 6, 2026, Amplitude reported Q1 FY2026 earnings (revenue beat by $0.6M) but simultaneously revised FY2026 non-GAAP operating income guidance downward from $7–13M to $2.5–6.5M — a reduction of approximately $4.5–7.5M at the midpoint. The stock fell approximately 21% in a single session (from ~$7.52 to ~$5.91). [S4: consensus.md, §Key Recent Events]

The guidance cut was attributed to two factors: (1) higher AI infrastructure costs associated with ramping AI product capabilities, and (2) investment required to support the Statsig strategic partnership. What made this disclosure notable — and potentially actionable — is that Amplitude had only 12 weeks earlier (February 18, 2026 Q4 FY2025 earnings call) provided initial FY2026 guidance of $7–13M non-GAAP operating income. The downward revision to $2.5–6.5M came just one quarter into that guided year.

Pomerantz LLP Investigation: Following the stock drop, Pomerantz LLP announced a securities fraud investigation into Amplitude and certain officers and directors. [S4: consensus.md, §Financial/Regulatory; full PR: prnewswire.com/news-releases, June 2026] As of June 2026, no formal complaint has been filed. Pomerantz investigations are common following large stock drops and frequently do not result in formal litigation. However, the pattern — initial guidance, rapid reversal, large stock drop — warrants independent assessment of whether management had material information at the time of the February guidance that should have been disclosed. Specifically: were the AI infrastructure cost overruns foreseeable as of Q4 FY2025 earnings? Was the Statsig deal already contemplated at the time of initial guidance? If the answers to either question are yes, disclosure adequacy is a legitimate concern.

Assessment: The guidance cut itself is not unusual for a company navigating AI infrastructure buildout costs. The speed and magnitude of the reversal is the concerning element. Investors should scrutinize Q4 FY2025 earnings call transcripts and February 18, 2026 10-K commentary for any language that foreshadowed the cost pressures that were disclosed just three months later.

SBC as % of Revenue: Predatory Dilution or Normal Growth SaaS?

At 26.8% of revenue in FY2025, Amplitude's SBC ratio is elevated versus SaaS industry norms:

[S3: xbrl_summary.md, §SBC; S2: stockanalysis_summary.md, §Cash Flow]

The FY2024 spike to 33.4% included a one-time acceleration of unvested equity from the Command AI acquisition. The FY2025 return to 26.8% represents normalization but remains high. At $92.1M in SBC on $343.2M in revenue, Amplitude is transferring approximately 27 cents of every revenue dollar to employees through equity compensation — before any operating expenses are covered.

Is this predatory? The term is strong, but the economics are challenging. If AMPL were a private company, this level of SBC would not be visible as a separate line item — it would just be cash compensation. The public market "sees" it because it is disaggregated as a non-cash charge. The issue is whether the talent cost is generating commensurate value creation. Three data points suggest the SBC level may be partially justifiable: (1) the company is retaining talent through competitive equity packages in a market where engineering talent is expensive; (2) SBC has been declining in absolute terms (FY2022 was $67.2M on $238M revenue, or 28%; FY2025 is $92.1M on $343M, also ~27%, so the ratio is improving slowly); (3) management has explicitly targeted further SBC reduction as part of the profitability roadmap.

The shareholder impact: The more concrete concern is dilution. The total share count at IPO (September 2021) was approximately 130M shares; by FY2025, the weighted average was 132M (basic) with diluted shares closer to 141M when including unvested RSUs and options. This implies approximately 8–10% dilution since IPO — manageable by historical standards but real. The trajectory matters: if SBC stays at $90M/year on a $350M revenue base and the share price remains at ~$7, the implied annual equity grant rate is approximately 12–14M shares/year, or ~10% of float annually. This is the most material ongoing concern for AMPL shareholders.

Share Count Increase Since IPO

[S3: xbrl_summary.md, §Weighted Average Shares]

The weighted average shares increased from ~111M (FY2022, first full public year) to ~132M (FY2025) — approximately +19% dilution over three years. The direct listing in September 2021 converted all preferred shares to common; the FY2022 base of 111M is the most comparable full-year public starting point. Annual share count growth has averaged ~6% since the direct listing, primarily from RSU vesting and employee stock purchase plan contributions. For long-term shareholders, this is a meaningful but not catastrophic dilution rate — it becomes more material if the stock price remains depressed.

Short Seller / Negative Research

No prominent short-seller reports specifically targeting Amplitude's accounting or business model have been publicly identified in recent years. The company's short interest is approximately 7.45% of float (~7.2M shares), elevated relative to historical norms but not at the 20%+ levels that typically signal organized short-selling campaigns. [S4: consensus.md, §Short Interest] The marginal increase in short interest around the May 2026 guidance cut suggests opportunistic short positioning rather than fundamental short thesis development.

Areas to investigate independently: (1) Whether Amplitude's ARR definition includes trial expansions or one-time commitments that inflate the headline figure; management has not restated ARR in prior periods, which is a relative positive; (2) Whether the NRR recovery from 96% to 106% is durable or driven by temporary expansion deals that pull forward future cohort expansion; (3) Whether the Statsig partnership ARR ($16M projected) is committed or aspirational.

Historical Guidance Accuracy

Based on available data, Amplitude has generally met or modestly exceeded revenue guidance while occasionally missing profitability targets. Q1 FY2026 showed a revenue beat of $0.6M (0.6%) but a non-GAAP EPS miss of $0.01 — consistent with a pattern of conservative revenue guidance and less-controlled cost guidance. The February 2026 → May 2026 operating income guidance reversal is the most significant guidance miss in recent history and calls into question the accuracy of management's near-term cost visibility, particularly around AI infrastructure spending.

Historical note: During the FY2022–2023 period, AMPL missed multiple NRR targets as the business deteriorated faster than guidance implied, suggesting management may have been slow to incorporate macro headwinds into forward guidance. This is a recurring risk given the subscription-lag between booking trends and revenue recognition.

Revenue Recognition Concerns

No revenue restatements have been identified. KPMG has been Amplitude's auditor since the IPO. KPMG issued unqualified (clean) audit opinions for FY2024 and FY2025. [S1: 10-K FY2025, §Filing Details] Going concern language is absent from the FY2025 10-K, which is expected given $252M in liquid assets. Internal controls: the 10-K does not disclose any material weaknesses as of December 31, 2025.

Capitalized software as an area of scrutiny: The increase in capitalized internal-use software costs from FY2023 to FY2024 (contributing to the company-defined FCF differential from simple OCF-minus-CapEx) warrants monitoring. If capitalized software costs increase materially, it shifts expenses from the income statement to the balance sheet temporarily — a qualitative risk that is mitigated by the relatively small dollar amounts involved (~$4–5M annually).

Structural Risk Summary

6. Key Financial Metrics Table

[S1: 10-K FY2025; S2: stockanalysis_summary.md; S3: xbrl_summary.md; S4: consensus.md]

7. Source Index