11 startups in Waltham filed a Form D in the last 12 months. Together they reported $159.0M sold in 11 new rounds. The median round was $10.0M.
Startups
11
filed in 12 months
Reported new funding
$159.0M
11 rounds
Median round
$10.0M
new rounds
Largest rounds
Latest filings
| Company | Industry | Filed | Amount sold | Investors |
|---|---|---|---|---|
| Industrial & Robotics | Oct 15, 2026 | $10.0M ↗ | 5 | |
| Industrial & Robotics | Oct 8, 2026 | $15.5M ↗ | 15 | |
| Energy & Climate | Oct 5, 2026 | $16.8M ↗ | 7 | |
| Biotech & Pharma | Aug 27, 2026 | $1.7M ↗ | 20 | |
| Healthcare | Jul 30, 2026 | $200K ↗ | 1 | |
| Biotech & Pharma | Apr 15, 2026 | $30.0M ↗ | 11 | |
| Biotech & Pharma | Mar 11, 2026 | $4.3M ↗ | 7 | |
| Healthcare | Mar 4, 2026 | $19.6M ↗ | 59 | |
| Biotech & Pharma | Jan 12, 2026 | $47.7M ↗ | 9 | |
| Biotech & Pharma | Nov 26, 2025 | $3.0M ↗ | 6 | |
| Biotech & Pharma | Nov 20, 2025 | $9.9M ↗ | 5 |
Waltham companies 35
| Company | Industry | City | Latest filing | Latest raise |
|---|---|---|---|---|
 AeroShield Materials, Inc.AeroShield makes transparent insulation for window and door manufacturers. | Industrial & Robotics | Waltham | Oct 15, 2026 | $10.0M |
 Finwave Semiconductor, Inc.Designs wireless semiconductor components for communications equipment and other applications. | Industrial & Robotics | Waltham | Oct 8, 2026 | $15.5M |
 Adden Energy, Inc.Develops solid-state batteries for electric vehicles and automakers. | Energy & Climate | Waltham | Oct 5, 2026 | $16.8M |
 FluidForm Bio, Inc.Develops cell therapies using printed human tissue for people with chronic diseases. | Biotech & Pharma | Waltham | Aug 27, 2026 | $1.7M |
 WaveGuide CorpPortable testing devices for organizations checking materials and detecting illness. | Healthcare | Waltham | Jul 30, 2026 | $200K |
 Alloy Therapeutics, Inc.Drug discovery platforms and development services for biotech companies, pharmaceutical firms and aca… | Biotech & Pharma | Waltham | Apr 15, 2026 | $30.0M |
 Everest Biolabs, Inc.Makes instruments and kits for researchers studying small particles released by cells. | Biotech & Pharma | Waltham | Mar 11, 2026 | $4.3M |
 Avava, Inc.AVAVA makes laser devices for skin treatments. | Healthcare | Waltham | Mar 4, 2026 | $19.6M |
| Biotech & Pharma | Waltham | Jan 12, 2026 | $47.7M | |
| Biotech & Pharma | Waltham | Nov 26, 2025 | $3.0M | |
| Biotech & Pharma | Waltham | Nov 20, 2025 | $9.9M | |
| Not classified yet | Waltham | Oct 14, 2025 | $13.2M | |
| Not classified yet | Waltham | Jul 9, 2025 | $18.9M | |
| Not classified yet | Waltham | May 7, 2025 | $3.9M | |
| Not classified yet | Waltham | Apr 1, 2025 | $10.2M | |
| Not classified yet | Waltham | Mar 13, 2025 | $16.8M | |
| Not classified yet | Waltham | Feb 5, 2025 | $2.9M | |
| Biotech & Pharma | Waltham | Dec 26, 2024 | $29.8M | |
| Healthcare | Waltham | Jul 31, 2024 | $18.4M | |
| Biotech & Pharma | Waltham | Jul 30, 2024 | $5.8M | |
| Not classified yet | Waltham | Jul 11, 2024 | $120K | |
| Biotech & Pharma | Waltham | Jul 2, 2024 | $17.4M | |
| Not classified yet | Waltham | May 14, 2024 | $11.2M | |
| Biotech & Pharma | Waltham | May 14, 2024 | $200.1M | |
| Biotech & Pharma | Waltham | May 2, 2024 | $10.5M | |
| Biotech & Pharma | Waltham | Dec 22, 2023 | $2.1M | |
| Not classified yet | Waltham | Dec 22, 2023 | $4.1M | |
| Not classified yet | Waltham | Dec 15, 2023 | $9.9M | |
| Biotech & Pharma | Waltham | Dec 5, 2023 | $4.5M | |
| Not classified yet | Waltham | Sep 22, 2023 | $1.2M | |
| Energy & Climate | Waltham | Aug 2, 2023 | $300K | |
| Healthcare | Waltham | May 5, 2023 | $10.1M | |
| Not classified yet | Waltham | Feb 22, 2023 | $999K | |
| Biotech & Pharma | Waltham | Feb 13, 2023 | $75.2M | |
| Biotech & Pharma | Waltham | Jan 12, 2023 | $599K |
How this page is built
Startups are the private companies counted as startups (see our startup funding data), placed by the address on their latest Form D. Registered-agent and virtual-office addresses are not counted as a location. Public companies, foreign issuers and business-combination filings are excluded.