United States · 
Who invested in Aetion?
Aetion's investors include Lakestar, Flare Capital, New Enterprise Associates, B Capital and Foresite Capital, and 8 more on record.
20172019202120232025
$11MSeries A$36MSeries B$27MSeries B?Venture
United States · Venture startup
Who invested in Aetion
Funding summaryUpdated 26 Oct 2026
$74Mraised across 4 rounds since 2017, from 4 sources
$11MSeries A$36MSeries B$27MSeries B
- Latest round
- VentureFeb 2025
- Biggest round
- $36MSeries B · Apr 2018
- Investors
- 13
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series A, $11M Mar 2017
- Biggest round
- $36M Series B · Apr 2018
- Usual gap between rounds
- 13 months the median of 3
The rounds
- Feb 2025VentureAmount undisclosed3 new2 returning
Source recorded
- Feb 2019Series B$27M6 new2 returning
New Enterprise Associates
Lakestar
Flare Capital- Amgen
Sanofi Ventures
UCB Ventures
McKesson- Horizon Health
Reported by FinSMEs
- Apr 2018Series B$36M2 new2 returning
- Lakestar
- Flare Capital
Oxeon- NEA/ Amgen
Reported by FinSMEsSEC filing: $36M sold, first sale Jan 2018
- Mar 2017
Founders and team
From Aetion's own website and the SEC filings it signed: 17 on the team.
- Amy AbernethyPresident of Product Development & Chief Medical Officer
- Kyle ArmbresterChief Executive Officer
- Conor HortonAssociate Vice President
- McLeod Physicians AssociatesAssociate Vice President
- Mark HarrisGM & President, Legal & Insurance
- Ashley GreenbergChief of Staff
- Jennifer WilliamsChief Financial Officer
- Josh BuilderChief Technology Officer
- Kathryn StalmackChief Legal Officer & General Counsel
- Sam DiederichChief Product Officer
- Shannon WestChief Strategy Officer
- Susan YunChief People Officer
- Annie HurstHead of Corporate Initiatives
- Maribeth JimenezOperations Manager
- Carolyn MagillExecutive Officer, Directori
- Jeremy RassenExecutive Officer, Directori
- Mohamad MakhzoomiExecutive Officer, Directori
On the board, as filediWilliam Geary
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Series A2017Series B2018Series B2019Venture2025LakestarFlare CapitalNew Enterprise Associates
B Capital
Foresite Capital
SanofiAmgenSanofi VenturesOxeonUCB Ventures
LakestarFlare CapitalNew Enterprise AssociatesB CapitalForesite CapitalSanofiAmgenSanofi VenturesOxeonUCB VenturesEveryone who backed them
AmgenCorporate VC1round
Horizon Healthno record of our own yet1round
NEA/ Amgenno record of our own yet1round
Missing a round, or an investor who was in one? Tell us.
Also claim to have backed them
This firm lists Aetion as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Quick answers about Aetion
How much has Aetion raised?
Aetion has raised $74M across 4 rounds since 2017. One round did not disclose an amount, so the total is a floor.
When did Aetion last raise?
Aetion's most recent round was a Venture in Feb 2025.
What was Aetion's biggest round?
Aetion's largest round on record is $36M (Series B), in Apr 2018.
Who backed Aetion first?
Aetion's first round on record, in Mar 2017, was backed by Lakestar and Flare Capital.
What stage is Aetion at?
Aetion's latest named round is a Venture, in Feb 2025.
Where is Aetion based?
Aetion is based in the United States.
Companies like Aetion
In the same sector, and raised in the last eighteen months.
Find investors like these
Search every investor by what they have actually funded, then narrow to your stage and market. Free.