Top recently funded startups in United States, week of 2026-03-09
United States logged 79 verified funding rounds in the week ending 08 Mar 2026, totalling ≈$9.8B. Lumentum anchors the week with a ≈$2.0B in Semiconductor Manufacturing. Technology, Information and Media was the busiest sector with 17 deals.
| Country |  United States |
| Deals this week | 79 |
| Total raised | ≈$9.8B |
| Top sector | Technology, Information and Media (17) |
| Most common round | Seed (27) |
| Most active investor | Y Combinator (7 deals) |
| Sources tracked | 319 |
The biggest 5 deals this week
| # | Company | Amount | Round | Sector | Announced |
|---|
| 1 | Lumentum | $2.0B | — | Semiconductor Manufacturing | 02 Mar 2026 |
| 2 | Coherent Corp. | $2.0B | — | Technology, Information and Media | 02 Mar 2026 |
| 3 | Together AI | $1.0B | — | Software Development | 07 Mar 2026 |
| 4 | Sierra Space | $550.0M | Series C | Aviation and Aerospace Component Manufacturing | 05 Mar 2026 |
| 5 |
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74 more funding rounds this week
Ayar Labs, Create Music Group, CMWA Capital Appreciation Fund LLC, Findhelp, Science, Cart.com, Grow Therapy, HawkEye 360 and 66 more closed rounds this week. Sign up to see amounts, round types, sectors and investor lists.
Start 7-day free trial →Closer look at the top 3
$2.0B · Semiconductor Manufacturing · United States
Lumentum (NASDAQ: LITE) is a global leader in optical and photonic technologies that power the networks and infrastructure behind AI, cloud computing, and next-generation communications.
“Nvidia's $4B bet on optical interconnects (replacing copper with light) directly benefits US companies Coherent (COHR) and Lumentum (LITE) via $2B investments each, plus purchase commitments for lasers and silicon photonics. Startup Ayar Labs gains from Nvidia's funding round too.”
7 more sources tracked. Read the full press release and reporter coverage.
Sign up to read →Investors: NVIDIA.
$2.0B · Technology, Information and Media · United States
Coherent empowers market innovators to define the future through breakthrough technologies, from materials to systems.
Most active investors this week
| # | Investor | Deals |
|---|
| 1 | Y Combinator | 7 |
| 2 | NVIDIA | 3 |
| 3 | Andreessen Horowitz | 2 |
| 4 | BCI | 2 |
| 5 | co-founder of Finom | 2 |
| 6 | Founders Fund | 2 |
| 7 | General Catalyst | 2 |
| 8 | Goldman Sachs Alternatives | 2 |
| 9 | IAG Capital Partners | 2 |
| 10 | Menlo Ventures | 2 |
What this week tells us
Technology, Information and Media accounted for 17 of 79 verified deals in United States this week. The stage mix was 28 early-stage (pre-seed to seed) against 51 Series A or later. Y Combinator was the most active investor, backing 7 of the week's rounds.
Built from 79 verified funding signals tracked by Signalbase. Window: 02 Mar – 08 Mar 2026. Last refresh: 05 Aug 2026.
Lumentum
