DDF PARALLEL LLP

UK registered

Companies House number OC416321·8 UK shareholdings·2 ownership layers

DDF PARALLEL LLP is a UK-registered corporate shareholder (Companies House number OC416321) and holds shares in 8 active UK companies, recorded across 20 share-class positions on their Companies House confirmation statements (CS01). Beneath those direct holdings OpenRegistry resolves a further 2 companies spanning 2 ownership layers, of which 5 direct holdings are themselves holding companies; the persons-with-significant-control register independently agrees on 1 of these holdings. It ranks #2,934 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
20

Identity
UK company OC416321

Jurisdiction
UNITED KINGDOM

Ownership layers below
2

Holdings that are holding companies
5

PSC register agrees on
1 holdings

Company profile

Companies House profile of DDF PARALLEL LLP

Shareholders

Shares held by DDF PARALLEL LLP in 8 UK companies

Ownership chain

2 companies across 2 layers beneath DDF PARALLEL LLP

Official record

Companies House record OC416321

Shareholdings

Every company DDF PARALLEL 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
CUMULUS NEUROSCIENCE LIMITED ▼NI628481	Active	GROUP	SERIES A1	25,862	1.50%	0.50%	1.00%	2025-09-12
CUMULUS NEUROSCIENCE LIMITED ▼NI628481	Active	GROUP	SERIES A2	25,660	2.18%	0.50%	1.00%	2025-09-12
AMPHISTA THERAPEUTICS LIMITED11119959	Active	GROUP	SERIES B PREFERRED	157,894	1.03%	0.64%	0.64%	2025-12-06
AVIADOBIO LTD ▼12373955	Active	GROUP	SERIES A PREFERRED	324,072	0.60%	0.36%	0.57%	2025-12-19
			SERIES SEED PREFERRED	150,000	1.25%	0.17%
			SERIES B PREFERRED	35,765	0.23%	0.04%
DDF CHEMCO LIMITED10346052	Active - Proposal to Strike off		ORDINARY	6,663,846				2021-08-08
HARNESS THERAPEUTICS LIMITED11532498	Active	SMALL	PREFERRED	258				2024-08-21
HARNESS THERAPEUTICS LIMITED11532498	Active	SMALL	ORDINARY	130				2024-08-21
LOQUS23 THERAPEUTICS LIMITED11914774	Active	SMALL	SERIES SEED-2 EXTENSION PREFERRED	107,260				2026-03-28
			SERIES SEED EXTENSION PREFERRED	418,000
			SERIES A PREFERRED	171,602
			ORDINARY	21,000
ASTRONAUTX LIMITED11919384	Active	GROUP	SERIES A-1 PREFERRED	195,000				2026-03-31
			ORDINARY	20,400
			SERIES A-2 PREFERRED	277,406
			SERIES SEED PREFERRED	138,000
ALCHEMAB THERAPEUTICS LTD12156844	Active	MEDIUM	SERIES A-3 PREFERRED	69,378				2025-11-28
			ORDINARY	45,940
			SERIES A-1 PREFERRED	495,714

Ownership structure below these holdings

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

CUMULUS NEUROSCIENCE LIMITEDNI628481
- BRAINWAVEBANK LTD.NI673252 ORDINARY
AVIADOBIO LTD12373955
- NEUROGENEUS LTD13685211 ORDINARY · 100.00%

Related company owners

Corporate shareholders that hold shares in the same UK companies as DDF PARALLEL LLP:

DEMENTIA DISCOVERY LPLP016829 14 shared holdings
ADVENT LIFE SCIENCES LLPOC347034 12 shared holdings
SV7 IMPACT MEDICINE FUND LPLP019996 9 shared holdings
ALS III CARRY AND CO-INVEST LPSL033226 9 shared holdings
UTF GENERAL PARTNER LLPOC403211 8 shared holdings
ELI LILLY AND COMPANY LIMITED00284385 4 shared holdings

Other corporate shareholders of comparable size registered in UNITED KINGDOM:

INNOVO FAIRNESS LLPOC368873 7 UK holdings
TECHSTARS LONDON 2013 LLPOC382911 7 UK holdings
ALCUIN GP IV LLPOC397705 7 UK holdings
GROWTH PARTNER LLPOC402545 7 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.