Diligence memo · auto-generated · as of July 3, 2026
Castle Island Brewing Company, LLC
Castle Island Brewing Company, LLC looks fair against its niche peers and is dormant on financing cadence.
Businessfiled
Castle Island Brewing Company, LLC operates in Food & Beverage, based in BOSTON.
Sub-sector tags: food-beverage.
No verified homepage on file yet — operating evidence is limited to the public record.
Capital & rounds (filed)filed
Castle Island Brewing Company, LLC has raised $618K in disclosed capital across 2 recorded rounds, aggregated from public filings. Its latest round is modeled as Pre-Seed (a round under $1.0M).
Largest single filing: $355K on 2015-03-21.
Most recent recorded round closed around 2017-01-06.
Valuation (modeled)modeled
Provath models Castle Island Brewing Company, LLC at approximately $6.1M (range $175K–$69M). This is an algorithmic estimate from round sizes and same-niche peers — not a quoted or reported figure.
Read: Fair. Modeled value is 0.74× the median modeled value of Pre-Seed Food & Beverage companies in 2016–2018 (72 peers) — value vs value, same stage and era. Within the normal band (74% of peer median) for its niche.
Financing rhythm & timingmixed
Historic cadence: a new round about every 11 months.
Last raise 9.5 yr ago; this sector typically re-raises about every 15 months.
Silent for over 3× the sector's normal cadence.
The last round stepped up 1.0× from the prior — scaling.
Comparablesmixed
Capital scale ranks ahead of 57% of Food & Beverage peers (567 compared).
Modeled value ranks above 58% of those peers.
Closest niche peers: Spring Creek Brewing Co LLC, Single Hill Brewing Co, Full Circle Brewing, Co. Ltd. LLC, Joyland Brewing Company, LLC, Door County Brewing Co., LLC.
Peoplefiled
1 named person on file across officers, directors and signatories.
Risks & flagsmixed
Financing has been silent well beyond sector cadence — possibly defunct, acquired, or paused.
No clearly named CEO/founder/principal in the surfaced records — key-person evidence is thin.