Funded Startups in Waltham
Among the 50 Waltham-area rounds shown, the largest disclosed amount is Thermo Fisher Scientific’s $741M “Post-IPO Debt” on 2022-10-14, which dwarfs the ne…
Among the 50 Waltham-area rounds shown, the largest disclosed amount is Thermo Fisher Scientific’s $741M “Post-IPO Debt” on 2022-10-14, which dwarfs the next-largest disclosed rounds in this list (e.g., Oruka Therapeutics $700M on 2026-04-28 and Dianthus Therapeutics $719M on 2026-03-10). At the other extreme, the smallest disclosed amount is Tubender’s $10K on 2025-03-18.
Most entries cluster in the biotech-heavy mix: 22 of 50 companies list Biotechnology, and stage information is frequently not specified (23 of 50 are “Series Unknown,” plus InfoBionic (2023-10-16) and others appear as “undisclosed” on the amount). Temporally, rounds span 2022-08-08 through 2026-06-17, with several very large checks concentrated in 2026—e.g., Eloxx $66M (2026-06-08) and, more strikingly, multiple $100M–$700M disclosed amounts between 2026-03-10 (Dianthus Therapeutics $719M) and 2026-04-28 (Oruka Therapeutics $700M).
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Frequently asked
What does the biggest disclosed round in Waltham look like versus everything else on the list?
Thermo Fisher Scientific’s $741M “Post-IPO Debt” (2022-10-14) is the clear outlier; the next-highest disclosed amounts shown are Dianthus Therapeutics at $719M (2026-03-10) and Oruka Therapeutics at $700M (2026-04-28), leaving the rest substantially below that top tier.
Where are the largest biotech-linked checks concentrated in time within the most recent entries?
In 2026, multiple high-dollar biotechnology rounds cluster close together: Dianthus Therapeutics closed $719M on 2026-03-10 and Oruka Therapeutics closed $700M on 2026-04-28, while Jade Biosciences ($150M on 2026-06-03) and Syndax Pharmaceuticals ($250M on 2026-06-04) extend the same run of large disclosed amounts.
How often is stage unspecified or the amount undisclosed across these 50 rows?
Stage is unspecified for 23 of 50 companies labeled “Series Unknown” (e.g., Syndax Pharmaceuticals on 2026-06-04 at $250M; Oruka Therapeutics on 2026-04-28 at $700M). Separately, four rows show “undisclosed” amounts: Constant Contact (2025-10-09), Pretzel Therapeutics (2025-07-02), TScan Therapeutics (2024-12-23), and InfoBionic (2023-10-16).
Do any sectors appear disproportionately often in this Waltham list?
Biotechnology is the dominant sector by count: 22 of 50 entries list Biotechnology (for example, Triveni Bio at $65M on 2026-06-17 and Deciphera Pharmaceuticals at $125M on 2023-01-19). Other sectors show up fewer times and generally function as small pockets (e.g., Hardware appears in a handful of rows such as Vicarious Surgical on 2025-10-08 at $6M and Veo Robotics on 2023-04-25 at $14M).
Are there notable low-end outliers in disclosed round size?
Yes: Tubender is a pronounced small-scale outlier with a disclosed $10K round on 2025-03-18, well below other low disclosed values such as Qeepsake’s $450K on 2024-11-20 and Creda Health’s $1M on 2026-01-26.
What is the temporal span of rounds shown, and what are the newest and oldest entries in the table?
The rounds shown span from 2022-08-08 (TRINITY, amount undisclosed) to 2026-06-17 (Triveni Bio at $65M). The most recent date in the listing is 2026-06-17 for Triveni Bio, and the earliest date is 2022-08-08 for TRINITY.
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