Funded Startups in Leiden
Disclosed rounds in Leiden skew sharply toward one outlier: LeydenJar Technologies’ $27M round on 2025-09-14 is the largest disclosed amount in the 19-row…
Disclosed rounds in Leiden skew sharply toward one outlier: LeydenJar Technologies’ $27M round on 2025-09-14 is the largest disclosed amount in the 19-row set, topping the next-highest disclosed entries of $21M (Samotics, 2025-01-27) and $12M (Vico Therapeutics, 2024-06-24). The smallest disclosed amount is $380K, appearing multiple times (AVIGI Therapeutics on 2025-04-04; ExCulture and IridescentBio on 2023-12-05). Most funding activity in these rows clusters around late-2023 to mid-2025: entries run from 2021-03-02 (Samotics, $6M) through the most recent date 2025-09-14 (LeydenJar Technologies, $27M). Sector and stage composition also show concentration: Health Care and Biotechnology each recur across the list (both appear in 4+ entries), while “Series Unknown” occurs in 5 entries and “undisclosed” occurs in 2 entries, indicating meaningful reporting gaps alongside clearly disclosed figures.
Most recent rounds
19 shownRelated listings
Frequently asked
What does the funding-size distribution look like in this Leiden set—does one round dominate?
Yes. The largest disclosed round is $27M (LeydenJar Technologies, 2025-09-14), and it is substantially higher than the next-largest disclosed amounts of $21M (Samotics, 2025-01-27) and $12M (Vico Therapeutics, 2024-06-24). The low end is $380K, shown in AVIGI Therapeutics (2025-04-04) and both ExCulture and IridescentBio (2023-12-05).
Where is the temporal clustering—are most rounds concentrated in a narrow window?
The 19 rounds are concentrated in the 2023–2025 span, with multiple entries in late 2023 (e.g., three on 2023-12-05: ExCulture $380K and IridescentBio $380K, plus QuantaMap on 2023-12-06 at $2M). The oldest shown date is 2021-03-02 (Samotics, $6M), while the most recent is 2025-09-14 (LeydenJar Technologies, $27M).
Which sectors are most represented among these 19 companies?
Health Care and Biotechnology are the most frequent groupings in the visible rows, each showing up in 4+ entries (Health Care: AVIGI Therapeutics 2025-04-04 $380K; Vico Therapeutics 2024-06-24 $12M; ExCulture 2023-12-05 $380K; 4MedBox 2023-05-23 undisclosed. Biotechnology: BIMINI Biotech 2025-01-13 $3M; Batavia Biosciences 2024-04-09 undisclosed; IridescentBio 2023-12-05 $380K; In Ovo 2023-11-02 $42M; Anavo Therapeutics 2023-05-02 $9M).
How much of the list is hard to compare due to missing or unspecified round sizes/stages?
Reporting gaps are material: 5 entries are labeled “Series Unknown” (e.g., LeydenJar Technologies 2025-09-14 $27M; Samotics 2025-01-27 $21M; Batavia Biosciences 2024-04-09 undisclosed), and 2 entries show “undisclosed” amounts (Batavia Biosciences, 2024-04-09; 4MedBox, 2023-05-23; plus Campspace is also “Undisclosed” amount on 2022-04-21 at $3M—amount disclosed but stage undisclosed).
Are there any notable outliers beyond the largest disclosed round?
In addition to the $27M peak, In Ovo’s $42M on 2023-11-02 is a major disclosed outlier within the same city but above most other disclosed amounts (e.g., ChannelEngine’s $50M is present, but note that it sits in 2022-03-15 with $50M—this makes ChannelEngine the top disclosed round in the set if considering disclosed values across all rows). If focusing strictly on the current maximum disclosed amount, ChannelEngine’s $50M on 2022-03-15 is the highest disclosed figure shown, far above the $42M at In Ovo (2023-11-02) and the $37M at VarmX (2023-05-25).
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