Funded Startups in Waltham
Disclosed funding in Waltham shows a clear size outlier: Thermo Fisher Scientific’s $741M (2022-10-14) dwarfs the next-largest disclosed round at $719M (Di…
Disclosed funding in Waltham shows a clear size outlier: Thermo Fisher Scientific’s $741M (2022-10-14) dwarfs the next-largest disclosed round at $719M (Dianthus Therapeutics, 2026-03-10), and only three additional companies in the set clear $600M (Oruka Therapeutics $700M on 2026-04-28; Kailera Therapeutics $600M on 2025-10-19). The page also clusters toward life sciences and later dates, with 14 disclosed rounds occurring from 2025-10-19 through 2026-07-22, while the disclosed minimum is Tubender’s $10K (2025-03-18), far below the rest of the distribution.
Sector concentration is pronounced: Biotechnology appears in at least 19 of the 50 rows (e.g., Oruka Therapeutics $700M on 2026-04-28; Dianthus Therapeutics $719M on 2026-03-10; Syndax Pharmaceuticals $250M on 2026-06-04), alongside additional Health Care and adjacent healthcare labels. Stage labels are frequently not specified: 23 of 50 entries show “Series Unknown” (e.g., Eloxx $66M on 2026-06-08; Zenas BioPharma $100M on 2026-03-27; Great Elm Capital $40M on 2023-08-08), spanning the full window from 2022-08-15 to the most recent round on 2026-07-22.
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Frequently asked
What is the largest disclosed round on the Waltham list, and how does it compare to the rest of the disclosed amounts?
Thermo Fisher Scientific’s $741M (2022-10-14) is the largest disclosed amount on the page. It sits just above Dianthus Therapeutics’ $719M (2026-03-10) and Oruka Therapeutics’ $700M (2026-04-28), with only a small number of disclosed rounds reaching the $600M+ range (Kailera Therapeutics $600M on 2025-10-19).
Are there funding outliers on the low end worth flagging for outreach or diligence?
Yes. Tubender’s $10K (2025-03-18) is the smallest disclosed amount, materially below other disclosed rounds such as Qeepsake’s $450K (2024-11-20) and Nanomosaic’s $3M (2025-11-28). Several entries remain undisclosed (6 of 50), so low-disclosed comparisons exclude those rows.
Does the list cluster in time, especially near the most recent rounds?
The most recent window is heavily populated: from 2025-10-19 (Kailera Therapeutics) through 2026-07-22 (Mentari Therapeutics), multiple disclosed rounds appear in succession, including Syndax Pharmaceuticals $250M (2026-06-04), Dianthus Therapeutics $719M (2026-03-10), and Oruka Therapeutics $700M (2026-04-28). The overall date coverage runs from 2022-08-15 to 2026-07-22, but late-2025 to 2026 contains the densest high-dollar entries.
Which sectors appear to dominate the Waltham-funded activity on this page?
Biotechnology is the most frequent sector label, appearing in at least 19 rows (e.g., Oruka Therapeutics $700M on 2026-04-28; Dianthus Therapeutics $719M on 2026-03-10; Syndax Pharmaceuticals $250M on 2026-06-04). Health Care and adjacent healthcare labels also recur (e.g., Jade Biosciences $150M on 2026-06-03; Eleanor Health $22M on 2024-02-23), but Biotechnology is the clear primary cluster.
How often are stage labels missing, and are those “Series Unknown” entries spread across the period?
Stage is frequently not specified: 23 of 50 entries show “Series Unknown” (for example Eloxx $66M on 2026-06-08, Zenas BioPharma $100M on 2026-03-27, and Great Elm Capital $40M on 2023-08-08). These entries are not confined to one moment; they occur across the full range from 2022-08-15 through 2026-07-22.
Which combination looks most like a sustained high-value biotech cluster rather than one-off funding?
High disclosed amounts repeatedly land in Biotechnology-adjacent companies during 2025-10-19 to 2026-07-22, including Kailera Therapeutics $600M (2025-10-19), Dianthus Therapeutics $719M (2026-03-10), Oruka Therapeutics $700M (2026-04-28), and Mentari Therapeutics $200M (2026-07-22). That pattern contrasts with the outlier low end (Tubender $10K on 2025-03-18), which appears as a single-digit thousands event rather than a cluster.
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