Small-Cap Robotics Stocks April 2026 — Only 3 Pass Our Filter
We scored every small-cap robotics stock for April 2026. Only 3 pass our fundamental filter. Plus 1 automation-adjacent pick worth watching.
Every small-cap investor has heard the robotics pitch: humanoid robots, surgical robots, delivery robots, warehouse automation, Tesla Optimus, Figure AI. The TAM charts go vertical. The stocks follow.
Then you open the financials and most of these names are single-digit-revenue companies burning tens of millions a quarter with no clear path to profit.
We scored every small-cap stock that qualifies as robotics or robotics-adjacent in our universe (market cap <$2B). Only 3 pure-play robotics names pass our fundamental filter. We're also including 1 automation-adjacent pick that passes on the math even if it's not a robotics company in the humanoid sense.
Here's the honest picture for April 2026.
Why Robotics Is a Tough Small-Cap Niche
Robotics is dominated by large-caps: Intuitive Surgical, ABB, Rockwell, Fanuc, Keyence. Those are the companies that actually print margins. The small-cap layer is either:
- Pre-revenue R&D stories — big TAM decks, small income statements
- Pure-speculation humanoid plays — betting on adoption curves that haven't shown up in revenue
- Medical robotics with real products — a small club, surgical and diagnostic
- Automation-adjacent industrial names — CNC controls, motion systems, precision machinery, not "robotics" in the Tesla-Optimus sense
That's the landscape. No amount of scoring turns a burning-cash humanoid prototype company into an investable name. What scoring can do is separate the few small-caps with actual products, actual revenue growth, and actual balance sheets from the lottery tickets.
Key scoring angles for robotics small-caps:
- Gross margin — separates IP and product companies from contract-R&D burners
- Cash runway — most robotics small-caps raise frequently; survival matters
- Revenue growth quality — explosive growth from $0.5M to $5M is a different signal than from $100M to $140M
- Dilution discipline — many robotics names dilute 30–60% a year
The 3 Small-Cap Robotics Stocks That Pass Our Filter — April 2026
1. PROCEPT BioRobotics (PRCT) — Score: 71.2 | Grade: SOLID
| Metric | Value | Score |
|---|---|---|
| Revenue Growth YoY | +37.2% | 62 |
| Gross Margin | 63.7% | 89 |
| Cash Runway | 70 months | 95 |
| Debt/Equity | 21.5 | 72 |
| P/S Ratio | 5.1x | 82 |
| Rule of 40 | 3.5 | 23 |
| Insider Ownership | 4.4% | 27 |
| 12m Dilution | +2.0% | 88 |
What drives the score: AquaBeam robotic system for urological surgery (benign prostatic hyperplasia). Real product, real hospital adoption. 37% YoY revenue growth, 64% gross margin, 70 months of runway, minimal dilution. This is the cleanest small-cap robotics story we score.
Red flags: Rule of 40 at 3.5 means they're still running operating losses even with strong growth — they're investing heavily in install base. Insider ownership is only 4.4% (founders have largely cashed out). If hospital capex slows, adoption curves flatten.
Market cap: $1.57B. Industry: Medical Devices (surgical robotics).
2. Serve Robotics (SERV) — Score: 56.5 | Grade: SPECULATIVE
| Metric | Value | Score |
|---|---|---|
| Revenue Growth YoY | +773.3% | 100 |
| Gross Margin | -4.1% | 0 |
| Cash Runway | 69 months | 94 |
| Debt/Equity | 1.8 | 97 |
| P/S Ratio | 409.4x | 0 |
| Rule of 40 | -1339 | 0 |
| Insider Ownership | 10.8% | 65 |
| 12m Dilution | +45.2% | 10 |
What drives the score: Sidewalk delivery robots for Uber Eats and 7-Eleven. Revenue grew +773% YoY from a tiny base, fleet is scaling, cities are signing on.
Red flags — and there are many: Gross margin is negative 4% — they're losing money on every delivery at the unit-economics level. P/S at 409x tells you the market is paying for 2030 revenue, not 2026. 45% dilution in the last 12 months is massive. Rule of 40 is literally -1,339 (growth is fast, but operating losses are orders of magnitude larger than growth rate).
Why we include it despite the warts: SERV is the most visible pure-play small-cap robotics name in the US market. If you're positioning for the autonomous-delivery build-out, this is the liquid way to do it. Just size it as the asymmetric bet it actually is, not as a fundamental pick.
Market cap: $796M. Industry: Specialty Industrial Machinery (delivery robots).
3. Richtech Robotics (RR) — Score: 51.5 | Grade: SPECULATIVE
| Metric | Value | Score |
|---|---|---|
| Revenue Growth YoY | +19.0% | 30 |
| Gross Margin | 65.2% | 92 |
| Cash Runway | 257 months | 100 |
| Debt/Equity | 0.3 | 100 |
| P/S Ratio | 110.1x | 0 |
| Rule of 40 | -336.7 | 0 |
| Insider Ownership | 2.0% | 12 |
| 12m Dilution | +60.0% | 0 |
What drives the score: Commercial service robots — bartending, hospitality, and AI-powered delivery in venues. 65% gross margin (they sell robots, not deliveries), effectively zero debt, huge cash runway.
Red flags: 60% share dilution in 12 months — that's how they got the cash runway, not through operations. Insider ownership at 2% is weak alignment. P/S at 110x with only 19% growth is steep. Rule of 40 deeply negative because of operating losses.
Why we score it below 55 but include it: Real products shipping to real customers, clean balance sheet, and the small-cap commercial-robotics space is narrow. You won't find many alternatives at this market cap with actual revenue and clean debt.
Market cap: $543M. Industry: Specialty Industrial Machinery (service robots).
4. (Automation-adjacent) Hurco Companies (HURC) — Score: 56.0 | Grade: SPECULATIVE
Not a robotics company. Include it if you want industrial-automation exposure as the durable version of the theme.
| Metric | Value | Score |
|---|---|---|
| Revenue Growth YoY | -4.3% | 5 |
| Gross Margin | 18.5% | 32 |
| Cash Runway | Profitable | 100 |
| Debt/Equity | 6.0 | 92 |
| P/S Ratio | 0.57x | 100 |
| Rule of 40 | -10.1 | 0 |
| Insider Ownership | 10.2% | 63 |
| 12m Dilution | -0.4% (buyback) | 100 |
What drives the score: CNC machine tools with integrated motion control and automation software. The actual-hands-of-factory-automation play. Profitable, net buyer of its own shares (-0.4% share count), P/S of 0.57x is cheap.
Red flags: Revenue declined 4% YoY — industrial capex cycle pressure. 18% gross margin is on the low end for our universe. This is the "boring but real" automation pick for investors who want exposure without lottery-ticket risk.
Market cap: $100M. Industry: Specialty Industrial Machinery.
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The Rest of the Universe: What Didn't Pass
We scored 24 specialty industrial machinery small-caps and 12 robotics-named names. The ones that fell below our threshold shared common failure modes:
- Microbot Medical (MBOT) — score 16.2 — pre-revenue medical robotics; real tech, no commercial traction yet
- AMC Robotics (AMCI) — score 44.1 — revenue down 36% YoY, margin compression
- Micropolis AI Robotics (MCRP) — score 36.0 — cash runway zero, revenue declining
- Quantum eMotion (QNC) — score 21.6 — no revenue reported, pure R&D burn
None of these are investable by our metric. Some may turn into winners — pre-revenue robotics occasionally does — but that's a different game than fundamental scoring.
The Honest Caveat: Our Backtest
Our score's Top 20 portfolio, rebalanced quarterly, beat the Russell 2000 by +52.9% cumulatively over 5 quarters — but only at the $100k daily-volume threshold. At $500k, the edge shrinks to near zero. At $1M, it disappears. Full numbers and methodology at /track-record.
Of these 4 robotics picks, PRCT and SERV trade liquidly. RR and HURC are thinner. Robotics as a theme is not where our backtest found the strongest edge — that was in healthcare and consumer, at our score's liquid end.
Risks Worth Knowing
- Humanoid-robotics hype cycle — expectations for Tesla Optimus, Figure, 1X are priced in. If timelines slip, the whole theme derates
- Dilution — SERV +45%, RR +60% in 12m. Small-cap robotics names burn and raise, burn and raise. Share count discipline matters more here than in any other sector
- Unit economics — many robotics plays lose money per unit sold or per delivery. Scale doesn't help if the unit economics are underwater
- Medical-device reimbursement risk — PRCT depends on CMS and private-payer coverage of robotic surgery. A reimbursement cut hurts adoption fast
- Industrial-capex cycle — HURC and similar automation names follow manufacturing capex, not AI excitement
How We Scored
Every stock gets 0–100 based on 8 equal-weight fundamentals: revenue growth, gross margin, cash runway, debt/equity, P/S ratio, Rule of 40, insider ownership, and 12-month dilution. Sector-adjusted where appropriate. Scores refresh weekly.
If you want the full picture on robotics adjacencies — industrial motion, sensors, vision systems — browse our 255 industrials small-caps or see small-cap AI infrastructure names.
Data as of April 19, 2026. Updated monthly. Past performance does not guarantee future results.