COLMACK ENGINEERING LTD.

💤Zombieactive

SC344129 · ltd · incorporated 2008-06-10

Investment thesis

Zombie company — trading but stalled; unlikely mover.

Why interesting: Quiet, steady; could be a succession or carve-out candidate with the right conversation.

Why risky: No growth signal; thin margin for error on price.

🔒Estimated value

—

Upgrade to see

Turnover

—

year to Jun 2025

Net worth

£249.0k

book net assets

Opportunity

75/100

Strong

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What this business does

Primary activity: Construction of other civil engineering projects n.e.c.

Sector: Construction

Investor take

Pursue

Strong opportunity: asset-holding vehicle with strong profile and bankable structure.

Opportunity 75/100 (strong), bankability 75/100. High owner-dependency — earn-out structure likely required for clean transition. Share purchase looks the cleaner deal structure. Biggest value-creation lever: Broaden director team. Sole director creates succession risk and reduces buyer comfort. Appoint a second director or strong #2. Most likely exit: share sale to pe / searcher (58/100).

Data confidence

Overall: medium (75/100)

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

Confirmed no charges registered

Directors & officers

4 officers (1 active, 4 linked, 1 with DOB)

Ownership & PSC

1 active PSC(s) of 1 total, 1 with control declared

Director network

Network not yet resolved

Filing history

47 filings on record

Gazette notices

No matching gazette notices (standard for active companies)

Opportunity Score

75/100Strong

PassWatchWorth a lookStrongExceptional

Solid opportunity signal. Worth a dedicated memo and management meeting.

Business quality

Active, clean filings, stable charge profile.

Acquirability

Some acquirability indicators.

Risk profile

Few red flags.

Signal strength

Good data coverage for analysis.

Signals from accounts

Derived from iXBRL accounts · accounting standard not declared

Positive net assets

Net assets £249,037

Net assets shrinking

Down £9,401 YoY

Cash YoY

-5%

Year on year

Key financials

2 years extracted from filed iXBRL accounts

Cash

£139k

↓ 4.6% YoY

Net Worth

£249k

↓ 3.6% YoY

Current Assets

—

Current Liabilities

—

Hover to see exact values · click legend to toggle series

Financials

Extracted from Companies House accounts · accounting standard unknown

Metric	2025-06-30	2024-06-30
Total assets	£249.0k	£258.4k
Cash	£139.1k	£145.8k
Net assets	£249.0k	£258.4k

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

🔒Filing-note intelligence

1 signal 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

filing

• 1 accounts

Last 180 days

filing

• 1 accounts

Counts from Companies House filing history.

Corporate timeline (24 events)Click to expand

2026-03-25
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2025-03-26
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2024-03-25
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2023-03-23
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2021-11-15
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2020-12-17
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2020-02-05
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2019-07-16
➖
NICOLSON SECRETARIAL SERVICES LTD resigned
corporate-secretary
2019-07-16
📄
termination-secretary-company-with-name-termination-date
officers · TM02
2019-03-26
📄
accounts-with-accounts-type-total-exemption-full
accounts · AA
2018-06-09
📄
change-person-director-company-with-change-date
officers · CH01
2018-06-09
📍
change-registered-office-address-company-with-date-old-address-new-address
address · AD01
2017-12-11
📄
accounts-with-accounts-type-micro-entity
accounts · AA
2017-03-17
📄
accounts-with-accounts-type-total-exemption-small
accounts · AA
2016-06-17
📄
annual-return-company-with-made-up-date-full-list-shareholders
annual-return · AR01
2015-12-23
📄
accounts-with-accounts-type-total-exemption-small
accounts · AA
2015-06-22
📄
annual-return-company-with-made-up-date-full-list-shareholders
annual-return · AR01
2011-05-17
➕
NICOLSON SECRETARIAL SERVICES LTD appointed
corporate-secretary
2008-06-10
🏢
Company incorporated
As COLMACK ENGINEERING LTD.
2008-06-10
➕
MACKENZIE, Colin appointed
director
2008-06-10
➕
BRIAN REID LTD. appointed
corporate-secretary
2008-06-10
➖
BRIAN REID LTD. resigned
corporate-secretary
2008-06-10
➕
STEPHEN MABBOTT LTD. appointed
corporate-director
2008-06-10
➖
STEPHEN MABBOTT LTD. resigned
corporate-director

Owner dependency

85/100

Critical — business is the founder

The business appears inseparable from the founder. Acquisition without a serious earn-out or meaningful transition period would likely destroy value.

FACTORS

+Sole director: Only one active director — all governance concentrated on one person.
+Long-tenure founder: Senior director has been in place 18 years — deep operational knowledge concentrated in one person.

Succession & seller-readiness

68/100

Strong succession signal

Multiple signals suggest succession is on the horizon. Candidate for proactive outreach.

SIGNALS

primarySole active director: Only one director in control. No visible successor — buyers solve the succession problem.
secondary12+ year tenure: Director in role 18 years.
secondaryStable-but-static management: Company is 18 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

1 active beneficial owner · dominant holder ≥75%

Name	Shares	Voting rights	Nature of control	Notified
Mr Colin Mackenzie Individual · British · DOB 04/1969 · age 57	75–100%	75–100%	board control75-100% shares · 75-100% voting · board control	06/04/2016

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

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CONTRACT AIR SYSTEMS LIMITED→ SC199119 · est 1999 · no financials extracted	—	—	—	—	26y	—	—
CORRIGAN INTERIORS (PAISLEY) LTD→ SC849848 · est 2025 · no financials extracted	—	—	—	—	—	—	—
COWAL CONSTRUCTION PEOPLE LTD→ SC784880 · est 2023 · no financials extracted	—	—	—	—	2y	—	—
COWAL STOVES LTD→ SC282140 · est 2005 · no financials extracted	—	—	—	—	21y	—	—
COWIE PLUMBING SERVICES LTD→ SC829709 · est 2024 · no financials extracted	—	—	—	—	1y	—	—

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.

See pricing →

Company details

Statusactive

Typeltd

Incorporated2008-06-10

Jurisdictionscotland

Primary SIC42990 — Construction of other civil engineering projects n.e.c.

Registered office

12/1 Bungalow Main Road Castlehead

Paisley

Glasgow

PA2 6AJ

Scotland

Filing status

Accounts

Next due: 2027-03-31

Last made up to: 2025-06-30

Confirmation statement

Next due: 2026-06-24

Last: 2025-06-10

Officers (1 active · 3 resigned)

MACKENZIE, Colin→

director · ~57y · appointed 2008-06-10

View their other companies + combined net worth →

Active

BRIAN REID LTD.→

corporate-secretary · appointed 2008-06-10 · resigned 2008-06-10

Resigned

NICOLSON SECRETARIAL SERVICES LTD→

corporate-secretary · appointed 2011-05-17 · resigned 2019-07-16

Resigned

STEPHEN MABBOTT LTD.→

corporate-director · appointed 2008-06-10 · resigned 2008-06-10

Resigned

Click a director name to see their full track record across all companies.