United Kingdom · 
What does Calculus Capital invest in?
Calculus Capital invests most often at Venture and Series A (77% of the rounds on record), in sectors such as Medtech, Healthtech and Audio.
Calculus Capital highlights
- 01
3 cheques in the last 12 months
- 02
Mostly Venture and Series A: 77% of its rounds
- 03
Sole investor in 13 rounds, median $4.1M
What they do
Calculus is an EIS and VCT fund manager, investing in innovative UK businesses.From their own website
- Type
- VC firm (from a list, unverified)
- Cheque size
- $1.0M – $3.0M as they say
- Stages
- Series ASeries BGrowthPre-IPO
- Sectors
- MedtechHealthtechAudio
- Based in
- London, United Kingdom
- Cold pitches
- Not stated
The record
Every round we can evidence, newest first18 appearances
- 2026
3 rounds
- Jun
- May
- Apr
- 2025
2 rounds
- Oct
- Mar
- 2019
3 rounds
- Aug
- May
- Jan
- 2015
5 rounds
- Nov
- Oct
- Oct
- Aug
- Jan
- 2014
3 rounds
- Nov
- Jul
- Mar
- 2013
2 rounds
- Nov
- Jun
An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.
The team
Named by the firm itself, on a filing, its Form ADV or its company registration13 named
AJArthur John GlencrosssecretaryiCompany registersince 1999
JHJulie Hong Nhan NgosecretaryiCompany registersince 2021
SRSusan Rebecca McdonalddirectoriCompany registersince 1999
DMDavid Malcolm ThomsondirectoriCompany registersince 2005
DSDiane Seymour-WilliamsdirectoriCompany registersince 2007
DJDoreen Julie LangstondirectoriCompany registersince 1999
HCHerman Constantyn Van Der WyckdirectoriCompany registersince 2004
KEKenneth EdwardsdirectoriCompany registersince 2012
LSL.C.I. Secretaries Limitedcorporate-secretaryiCompany registersince 1999
LSLesley Susan WatkinssecretaryiCompany registersince 2002
MTMark ThompsonsecretaryiCompany registersince 1999
NKNatalie Krystyna EvanssecretaryiCompany registersince 2019
RMRobert Martin DavisdirectoriCompany registersince 2018
We also hold 13 people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.
What the register says
From the firm's own filings with the UK company register, which it must file accurately by law
- Companies House
- 03861194, since 1999
What they claim to have backed
From their own portfolio page (on their website)
0 of 2 we have independently watched raise
CodewithfeelingEIS Portal
Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded.