Fastest-rising private companies in Massachusetts

Private companies headquartered in Massachusetts, ranked by new funding, active hiring and growth recognition from public records. Refreshed nightly.

8 companies · last 12 months

The list

#	Company	Rising	Why it ranks	Track
1	Boltz Boston, MA, Technology	31 warm	Reported raising $97.4M in a private offering, Oct 2026 · SEC filing	Track →
2	XRHealth Needham, MA, Health care	28 warm	Reported raising $16.3M in a private offering, Oct 2026 · SEC filing	Track →
3	Fresenius Medical Care Fulshear Waltham, MA, Health care	23 warm	Reported raising $4.4M in a private offering, Oct 2026 · SEC filing	Track →
4	AeroShield Materials Waltham, MA, Manufacturing	22 warm	Reported raising $10M in a private offering, Oct 2026 · SEC filing	Track →
5	Arkea Bio Charlestown, MA, Technology	20 warm	Reported raising $15M in a private offering, Sep 2026 · SEC filing	Track →
6	Crosslink Therapeutics Boston, MA, Pharmaceuticals	20 warm	Reported raising $5.5M in a private offering, Oct 2026 · SEC filing	Track →
7	Kappa Pay Boston, MA, Technology	20 warm	Reported raising $2M in a private offering, Oct 2026 · SEC filing	Track →
8	SpartanX Technologies Boston, MA, Technology	20 warm	Reported raising $5M in a private offering, Oct 2026 · SEC filing	Track →

How the Rising score works

Budget first. A company needs evidence of money to rank high: a raise reported to the SEC or an announced growth ranking. Bigger raises count for more.
Fresh beats old. Every fact counts for less as it ages, over the window it usually takes a company to act on it.
Evidence stacks. A raise together with active hiring ranks far above either alone. Hot needs more than one kind of evidence.
Public facts only. Every fact on this page links to its source. No individuals are named.

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Catch them as the money lands

Raises reported to the SEC, often weeks before any press, with the round size and date.

Know when they start hiring

New leadership openings and hiring surges from public job boards, read every night.

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Compiled from public records and refreshed nightly; last updated Oct 29, 2026. The Rising score is Lakewave's own, computed from the public records linked on each row; a raise is the amount the company reported in its SEC filing. Check the source before acting. See something wrong? Tell us and we will correct it.