# Antigenics LLC/DE: Form D filing

Antigenics LLC/DE, a biotechnology company in Lexington, MA, filed a Form D with the SEC in 2015. The latest, on September 23, 2015, reports $100 million sold of a $115 million offering to 9 investors.

Find out what Antigenics LLC/DE does, who founded it and who invested, beyond what the filing says. $10 of credit on sign-up, no card.

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## The full lists

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- [Form D filings in Massachusetts](https://specstream.ai/data/form-d/state/massachusetts): 1,533 rows, by operating companies, filed since November 1, 2024, $76.65, or the new rows each week for $19 a month. Buy: https://specstream.ai/data/form-d/state/massachusetts
- [Form D filings in Biotechnology](https://specstream.ai/data/form-d/industry/biotechnology): 1,568 rows, by operating companies, filed since November 1, 2024, $78.40, or the new rows each week for $19 a month. Buy: https://specstream.ai/data/form-d/industry/biotechnology

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## Company details from the filing

- Address: 3 FORBES ROAD, Lexington, MA, 02421
- Phone: (781) 674-4433
- Industry: Biotechnology
- Entity type: Limited Liability Company
- Incorporated in: Delaware
- Year incorporated: 2015
- Revenue range: Decline to Disclose
- Exemptions claimed: Rule 506(b)
- SEC identifier (CIK): 1653846

## Form D filings

| Filed | Type | Offering | Sold | Remaining | Investors | First sale | Filing |
| --- | --- | --- | --- | --- | --- | --- | --- |
| Sep 23, 2015 | New notice | $115,000,000 | $100,000,000 | $15,000,000 | 9 | Sep 8, 2015 | [sec.gov](https://www.sec.gov/Archives/edgar/data/1653846/000165384615000001/0001653846-15-000001-index.htm) |

## Executive officers and directors named in the filing

| Name | Role | Note in the filing |
| --- | --- | --- |
| Garo H. Armen | Executive Officer |  |
| Karen H. Valentine | Executive Officer |  |
| Charles Evan Ballantyne | Executive Officer |  |

## Other biotechnology companies in Massachusetts that filed recently

- [Zai Lab Ltd](https://specstream.ai/data/form-d/company/zai-lab-ltd-1704292) $249.9 million · Nov 9, 2026
- [AI3 Bio, Inc.](https://specstream.ai/data/form-d/company/ai3-bio-inc-2019875) offering · Nov 4, 2026
- [Tru Singular Health, Inc.](https://specstream.ai/data/form-d/company/tru-singular-health-inc-2158834) $1 million · Oct 30, 2026
- [511 Therapeutics, Inc.](https://specstream.ai/data/form-d/company/511-therapeutics-inc-1946264) $500,000 · Oct 30, 2026
- [Elucid Bioimaging Inc.](https://specstream.ai/data/form-d/company/elucid-bioimaging-inc-1585931) $56.2 million · Oct 27, 2026
- [OrthoIQ, Inc.](https://specstream.ai/data/form-d/company/orthoiq-inc-2154488) $1.1 million · Oct 23, 2026
- [LeanBio Therapeutics, Inc.](https://specstream.ai/data/form-d/company/leanbio-therapeutics-inc-2160802) offering · Oct 22, 2026
- [Quiver Holdings Inc.](https://specstream.ai/data/form-d/company/quiver-holdings-inc-2160800) $3 million · Oct 21, 2026
- [Axelyf, Inc.](https://specstream.ai/data/form-d/company/axelyf-inc-2078406) $2.6 million · Oct 13, 2026
- [BIOVENTRIX, INC.](https://specstream.ai/data/form-d/company/bioventrix-inc-1283259) $1.2 million · Oct 8, 2026
- [Opus KSD, Inc.](https://specstream.ai/data/form-d/company/opus-ksd-inc-1668934) $680,801 · Oct 1, 2026
- [Xact Bio, Inc.](https://specstream.ai/data/form-d/company/xact-bio-inc-2157427) $10 million · Sep 28, 2026
- [Way Biosolutions, Inc.](https://specstream.ai/data/form-d/company/way-biosolutions-inc-2155613) $2 million · Sep 25, 2026
- [AutoIVF, Inc.](https://specstream.ai/data/form-d/company/autoivf-inc-1807161) $1.5 million · Sep 25, 2026
- [Typewriter Therapeutics, Inc.](https://specstream.ai/data/form-d/company/typewriter-therapeutics-inc-2156390) $56.3 million · Sep 21, 2026

[Every Form D from the week of Sep 21, 2015](https://specstream.ai/data/form-d/week/2015-09-21) · [All recent filings in Massachusetts](https://specstream.ai/data/form-d/state/massachusetts) · [All recent Biotechnology filings](https://specstream.ai/data/form-d/industry/biotechnology)

Read from SEC EDGAR. Amount sold is what Antigenics LLC/DE reported on the day it filed; on an offering that is still open, a later amendment can raise it. Free to reuse with credit to SpecStream under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/).