# THINK Surgical

Canonical page: https://technooptimist.io/companies/think-surgical
Fremont, California maker of TMINI, a handheld robot for total knee replacement that works with implants from many manufacturers, unlike rivals tied to one company's knees. Privately held.

## In brief

- TMINI is an open platform: surgeons choose the implant; it covers about 70% of US knee implants by volume, including Stryker's Triathlon.
- 5,000th procedure in May 2026, five times the volume of a year earlier.
- Zimmer Biomet distributes TMINI with its Persona knee; up to $65M debt facility from Symbiotic Capital (July 2026).

## Facts

- Headquarters: US
- Status: private
- Raised: $65M
- Website: https://thinksurgical.com
- Frontiers: [Robotics](https://technooptimist.io/robotics.md) (Joint & spine surgery)

## Programs

- [TMINI](https://technooptimist.io/robotics/tmini.md) (Robotics): Scaling; next: Commercial expansion in the US (2026). 5,000+ knee replacements; compatible with ~70% of US knee implants; cases up fivefold in a year.

## Technical approach

- **Handheld: A robot in the surgeon's hand**: A wireless handpiece compensates for the surgeon's hand motion to place pins on exactly planned planes, instead of a large floor-standing arm.
- **Open library: Any implant maker's knee**: Each implant model gets its own data module and FDA clearance, so hospitals keep their preferred implant supplier.
- **CT plan: Cuts planned in 3D beforehand**: A CT scan of the knee is turned into a 3D plan that sets where every bone cut goes before surgery starts.

## Open problems

- **Adding implants one clearance at a time** (partially solved): Every new implant needs its own data module and FDA 510(k); THINK has added makers such as Zimmer Biomet, Medacta, LINK and Maxx.
- **Path to profitability** (open): The company says new debt plus investor money should fully fund it to profitability; that depends on keeping case growth high.

## Latest updates

- **14 Jul 2026**: THINK Surgical secures up to $65M debt facility from Symbiotic Capital to expand TMINI sales. Healthcare lender Symbiotic Capital provided a debt facility of up to $65 million to grow TMINI's commercial reach. ([our story](https://technooptimist.io/stories/think-surgical-secures-up-to-65m-debt-facility-from-symbiotic-capital-e916c2d4.md) · [original source](https://thinksurgical.com/think-surgical-secures-up-to-65-million-of-growth-capital/))
- **27 May 2026**: TMINI reaches 5,000 knee replacements, five times its volume of a year earlier. The 5,000th TMINI knee replacement was performed at Cedars-Sinai Orthopedics in Los Angeles, a year after the 1,000th. ([our story](https://technooptimist.io/stories/tmini-reaches-5-000-knee-replacements-five-times-its-volume-of-a-year-dd0d2118.md) · [original source](https://thinksurgical.com/think-surgical-announces-the-tmini-miniature-robotic-system-5000th-procedure-milestone/))
- **30 May 2023**: THINK Surgical gets FDA clearance for TMINI handheld knee-replacement robot. The FDA cleared TMINI, a wireless handheld robot for total knee replacement. ([our story](https://technooptimist.io/stories/think-surgical-gets-fda-clearance-for-tmini-handheld-knee-replacement-65b46e2a.md) · [original source](https://thinksurgical.com/think-surgical-receives-fda-510k-clearance-for-tmini-miniature-robotic-system/))

## Funding

| Date | Round | Amount | Post-money | Leads |
| --- | --- | --- | --- | --- |
| Jul 2026 | Debt facility (up to) | $65M |   | Symbiotic Capital |

## Partners, customers and investors

- Zimmer Biomet (partner): Exclusive distribution agreement (June 2024); TMINI cleared for its Persona knee.
- Symbiotic Capital (investor): Up to $65M debt facility (July 2026).
- Sagentia Innovation (supplier): Co-developed the TMINI handpiece.

## People

- Stuart Simpson, President and CEO

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