ADVENT LIFE SCIENCES LLP

UK registered

Companies House number OC347034·8 UK shareholdings·2 ownership layers

ADVENT LIFE SCIENCES LLP is a UK-registered corporate shareholder (Companies House number OC347034) and holds shares in 8 active UK companies, recorded across 24 share-class positions on their Companies House confirmation statements (CS01). Beneath those direct holdings OpenRegistry resolves a further 1 companies spanning 2 ownership layers, of which 3 direct holdings are themselves holding companies; the persons-with-significant-control register independently agrees on 5 of these holdings. It ranks #2,330 of 54,210 corporate shareholders by number of active UK holdings. Programmatic access via MCP at https://openregistry.sophymarine.com/mcp.

Companies held
8

Share-class positions
24

Identity
UK company OC347034

Jurisdiction
UNITED KINGDOM

Ownership layers below
2

Holdings that are holding companies
3

PSC register agrees on
5 holdings

Company profile

Companies House profile of ADVENT LIFE SCIENCES LLP

Shareholders

Shares held by ADVENT LIFE SCIENCES LLP in 8 UK companies

Ownership chain

1 companies across 2 layers beneath ADVENT LIFE SCIENCES LLP

Official record

Companies House record OC347034

Shareholdings

Every company ADVENT LIFE SCIENCES LLP appears on as a member, as filed. 8 of 8 are linked to their Companies House profile.

Company held	Status	Accounts	Share class	Shares	% of class	% of capital	Total % of capital	As of
AVIADOBIO LTD ▼12373955	Active	GROUP	SERIES A PREFERRED	5,234,279	9.69%	5.84%	9.18%	2025-12-19
			SERIES SEED PREFERRED	2,422,377	20.19%	2.70%
			SERIES B PREFERRED	577,647	3.72%	0.64%
PROXIMIE LIMITED10509541	Active	GROUP	SERIES C PREFERRED	4,491,556	15.06%	5.60%	5.60%	2025-12-04
VENTUS MEDICAL LIMITED09364884	Active	SMALL	A ORDINARY	484,756	3.44%	2.94%	2.94%	2025-12-19
PHENO THERAPEUTICS LIMITEDSC612347	Active	SMALL	SERIES SEED PREFERRED SHARES	68,738	1.37%	0.86%	1.42%	2023-10-30
			ORDINARY £0.0001	44,680	1.49%	0.56%
			SERIES A PREFERRED £0.0001	0		0.00%
LEVICEPT LTD08190142	Active	SMALL	SERIES A-2	19,008	1.23%	0.63%	0.74%	2026-01-26
			SERIES B-1	2,674	0.55%	0.09%
			SERIES B-2	331	0.15%	0.01%
			SERIES B-3	249	0.45%	0.01%
AMPHISTA THERAPEUTICS LIMITED11119959	Active	GROUP	SERIES A PREFERRED	118,311	1.67%	0.48%	0.71%	2025-12-06
			SERIES B PREFERRED	45,834	0.30%	0.19%
			ORDINARY	10,310	0.53%	0.04%
F2G LTD03578625	Active	GROUP	SERIES D CONVERTIBLE PREFERRED	75,690	3.24%	0.21%	0.45%	2025-06-10
			SERIES E CONVERTIBLE PREFERRED	45,811	0.65%	0.12%
			SERIES 1 C CONVERTIBLE PREFERRED	181,800		0.08%
			SERIES 2 C CONVERTIBLE PREFERRED	90,899		0.04%
			SERIES F CONVERTIBLE PREFERRED	145,994	0.42%	0.00%
			SERIES G CONVERTIBLE PREFERRED	4,161	0.01%	0.00%
			SERIES H1 CONVERTIBLE PREFERRED	1,901	0.00%	0.00%
			SERIES H CONVERTIBLE PREFERRED	4,262	0.01%	0.00%
ALS III MEMBER CO LIMITED11397908	Active	MICRO ENTITY	ORDINARY	1				2026-06-04

Ownership structure below these holdings

1 further companies sit beneath this entity’s direct holdings, across 2 layers. Each is linked to its Companies House profile.

AVIADOBIO LTD12373955
- NEUROGENEUS LTD13685211 ORDINARY · 100.00%

Related company owners

Corporate shareholders that hold shares in the same UK companies as ADVENT LIFE SCIENCES LLP:

ADVENT LIFE SCIENCES FUND I LPLP013554 80 shared holdings
ALS III CARRY AND CO-INVEST LPSL033226 33 shared holdings
ADVENT LIFE SCIENCES FUND III LPLP019592 24 shared holdings
ADVENT-HARRINGTON IMPACT FUND LPLP021104 24 shared holdings
MORNINGSIDE VENTURE INVESTMENTS LTD 24 shared holdings
ADVENT LIFE SCIENCES FUND II LPLP016108 19 shared holdings

Other corporate shareholders of comparable size registered in UNITED KINGDOM:

MCQUILLAN COMPANIES LIMITEDNI710899 8 UK holdings
SWORDFISH INVESTMENTS LLPOC308833 8 UK holdings
CLEARWATER CORPORATE FINANCE LLPOC311299 8 UK holdings
TWP ACCOUNTING LLPOC327359 8 UK holdings

Every company on this page is identified by its original Companies House registration number, shown beside its name and repeated in the data-company-number attribute of the same element. A shareholder that does not resolve to a registered company carries no number.

▼ marks a holding that itself holds shares in further companies, so ownership continues below it.

“% of capital” is the entity’s share of issued capital by nominal value, the correct basis when a company has multiple share classes.

Figures are as filed on each company’s most recent confirmation statement; the “As of” column gives that statement date. Source: Companies House Free Company Data and CS01 confirmation statements. Official record: find-and-update.company-information.service.gov.uk.