ADDVENT AIR SYSTEMS LIMITED

🌳Matureactive

02043424 · ltd · incorporated 1986-08-05

Investment thesis

Well-run mature business — low negotiation leverage; premium likely.

Why interesting: Textbook target; clean filings, stable trading.

Why risky: No pressure on seller; any deal likely at full price.

Opportunity decay

approaching window · 12-months

Approaching a transaction window — refinance or sale event plausible in the next 12 months.

· Oldest live charge 30.0y old — refinance window within 12 months

🔒Estimated value

—

Upgrade to see

Turnover

—

year to Mar 2025

Net worth

—

book net assets

Opportunity

83/100

Exceptional

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What this business does

Primary activity: SIC 28250

Sector: Manufacturing

Investor take

Pursue

Active trading company with a 74-year-old founder — textbook succession opportunity.

Opportunity 83/100 (exceptional), bankability 80/100. Strong seller-intent signal (63/100, director aged 74). Share purchase looks the cleaner deal structure. Biggest value-creation lever: Discharge stale live charges. 1 live charge(s) created 15+ years ago — likely paid but undischarged. Clean register. Most likely exit: share sale to pe / searcher (65/100).

🏦

Refinance opportunity

2 live charges · oldest 30.0y

65/100

clean up first

Refinance viable after a tidy-up — address the highlighted items first.

· Oldest live charge is 30.0 years old — likely at or near maturity.
· Single lender — cleanest path to refinance.
· Legal-friction score 25/100 — workable, but lender will want more DD.

Data confidence

Overall: medium (78/100)

Adequate coverage. AI outputs are reliable for the sections scored high; verify the rest in diligence.

Company profile

address, 1 SIC codes, incorporation date

100

Financials

2 years of iXBRL accounts extracted (YoY deltas available) + narrative notes parsed

Lenders & charges

2 charges (2/2 with lender, 2/2 with type)

Directors & officers

11 officers (5 active, 11 linked, 8 with DOB)

Ownership & PSC

3 active PSC(s) of 5 total, 5 with control declared

Director network

Network not yet resolved

Filing history

120 filings on record

Gazette notices

No matching gazette notices (standard for active companies)

Opportunity Score

83/100Exceptional

PassWatchWorth a lookStrongExceptional

Strong composite across quality, acquirability, and risk. High-priority target — progress to serious diligence.

Business quality

Active, clean filings, stable charge profile.

Acquirability

Strong succession / seller-readiness signals.

Risk profile

Few red flags.

Signal strength

100

Good data coverage for analysis.

Key financials

2 years extracted from filed iXBRL accounts

Cash

—

Net Worth

—

Current Assets

—

Current Liabilities

—

Hover to see exact values · click legend to toggle series

Financials

Extracted from Companies House accounts · accounting standard unknown

Metric	2025-03-31	2024-03-31
Average employees	1400	1600

Amounts extracted automatically from iXBRL. Fields left blank were not reported or not mapped. Values in GBP unless stated.

🔒Filing-note intelligence

2 signals detected in this company's narrative notes — going-concern language, audit opinion, contingent liabilities, related-party transactions.

Available from the Pro tier upwards.

See pricing →

Recent activity

Last 30 days

filings

Last 90 days

filings

Last 180 days

filings

Counts from Companies House filing history.

Corporate timeline (35 events)Click to expand

2025-06-04
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2025-05-07
📄
notification-of-a-person-with-significant-control
persons-with-significant-control · PSC01
2024-12-17
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2023-12-19
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2023-12-13
📄
termination-director-company-with-name-termination-date
officers · TM01
2023-11-30
➖
GIRLING, Jack Richard resigned
director
2022-06-13
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2022-05-13
📄
change-person-director-company-with-change-date
officers · CH01
2021-06-30
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2021-05-18
📄
change-to-a-person-with-significant-control
persons-with-significant-control · PSC04
2021-05-18
📄
change-person-director-company-with-change-date
officers · CH01
2021-01-04
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2019-07-22
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2019-06-27
📄
change-person-director-company-with-change-date
officers · CH01
2018-12-18
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2018-05-09
📄
notification-of-a-person-with-significant-control
persons-with-significant-control · PSC01
2018-05-09
📄
notification-of-a-person-with-significant-control
persons-with-significant-control · PSC01
2018-05-09
📄
cessation-of-a-person-with-significant-control
persons-with-significant-control · PSC07
2017-08-01
➖
GIRLING, Noel Glynne resigned
director
2017-06-13
➕
GIRLING, Glynne Christopher appointed
director
2017-06-13
➕
GIRLING, Samuel Ivor appointed
director
2017-06-13
➕
SMITH, Karen Joan appointed
director
2017-06-13
➕
GIRLING, Jack Richard appointed
director
2010-03-30
🔓
Charge satisfied #2
2008-07-26
➕
GIRLING, Julia Mary appointed
director
2005-04-29
➖
COOK, Pauline resigned
director
2005-02-23
➕
GIRLING, Julia Mary appointed
secretary
2005-02-23
➖
COOK, Pauline resigned
secretary
1996-12-20
🔒
Charge registered #2
Lender: The Royal Bank of Scotland PLC
1996-04-29
🔒
Charge registered #1
Lender: The Royal Bank of Scotland PLC
1996-02-05
➕
COOK, Pauline appointed
director
1995-12-15
➕
COOK, Pauline appointed
secretary
1995-06-30
➖
GIRLING, Julia Mary resigned
secretary
1995-06-30
➖
GIRLING, Julia Mary resigned
director
1986-08-05
🏢
Company incorporated
As ADDVENT AIR SYSTEMS LIMITED

Owner dependency

73/100

High — earn-out structure required

Material founder dependency. Consider a 2-3 year earn-out and build in a handover plan before completion.

FACTORS

-4 active directors: Broader management team in place — suggests transferable governance.
+Long-tenure founder: Senior director has been in place 18 years — deep operational knowledge concentrated in one person.
+Founder age: Director aged approximately 74 — succession pressure is live.
+Family involvement: Multiple officers share a surname — likely family business, which concentrates governance.

Succession & seller-readiness

83/100

Likely off-market candidate

Strong acquirability signals converging. Worth approaching directly — this is how off-market deals start.

SIGNALS

primaryFounder aged 70+: Senior director is approximately 74 years old. Natural succession window is now.
secondary12+ year tenure: Director in role 18 years.
secondaryStable-but-static management: Company is 40 years old and no new directors in the last 3 years — succession not yet being planned internally.
supportingClean filings + long tenure: Disciplined long-tenure operator — classic lifestyle-business pattern that often sells quietly.

Red flags

clean

No red flags detected from available public data. (This is not a clean bill of health — detailed accounts review still recommended.)

Shareholders & ownership

3 active beneficial owners

Name	Shares	Voting rights	Nature of control	Notified
Mr Glynne Christopher Girling Individual · British · DOB 12/1984 · age 42	25–50%	—	25-50% shares	03/05/2018
Mr Jack Richard Girling Individual · British · DOB 11/1987 · age 39	25–50%	—	25-50% shares	31/07/2017
Mr Samuel Ivor Girling Individual · British · DOB 03/1991 · age 35	25–50%	—	25-50% shares	31/07/2017

2 historic (ceased) PSCs

Mr Noel Glynne Girlingceased 01/08/2017· 25-50% shares
Mrs Julia Mary Girlingceased 31/07/2017· 25-50% shares

From Companies House Persons with Significant Control filings. Share ranges are banded per the public PSC regime.

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Peers ranked by estimated value, then turnover, then opportunity score.See all →

🔒Tailored diligence questions

7 specific questions generated from this company's actual signals — liquidity, leverage, director age, charge count, red flags, age-of-company.

Available from the Pro tier upwards.

See pricing →

🔒Advanced scoring suite

Exit-route ranking, improvement thesis, quiet-distress detector, covenant-pressure proxy, extraction monitor, approaching triggers, ownership drift, local cluster, value trap, debt capacity, archetype classification — 48+ scoring modules.

Available from the Pro tier upwards.

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Company details

Statusactive

Typeltd

Incorporated1986-08-05

Jurisdictionengland-wales

Primary SIC28250 — SIC 28250

Registered office

5 Kelvin Park

Dock Road

Birkenhead

Merseyside

CH41 1LT

Filing status

Accounts

Next due: 2026-12-31

Last made up to: 2025-03-31

Confirmation statement

Next due: 2026-05-17

Last: 2025-05-03