COSTAIN UPSTREAM LIMITED

🌳Matureactive

SC336371 · ltd · incorporated 2008-01-18

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.

Why now

Window closing · high confidence

Getting harder to buy — profile has hardened into "well run hard buy" recently.

· Lifecycle stage: zombie → mature
· Investment thesis: zombie_hold → well_run_hard_buy
· Deal-killer verdict: workable → clean
· Refinance opportunity: under_pressure → ready

Opportunity decay

approaching window · 12-months

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

· Oldest live charge 17.2y old — refinance window within 12 months

What changed my view

Last 30 days

No material changes in the last 30 days.

Last 90 days

Picture improved over the last 90 days — 3 positive signals vs 0 negative.

↑Lifecycle stage: zombie → mature
·Investment thesis: zombie_hold → well_run_hard_buy
↑Deal-killer verdict: workable → clean
↑Refinance opportunity: under_pressure → ready

Last 180 days

No snapshot from 180 days ago — start tracking from today.

🔒Estimated value

—

Upgrade to see

Turnover

—

not disclosed

Net worth

—

book net assets

Opportunity

77/100

Strong

🔒Generate AI memo →🔒Outreach pack →🔒Corporate story →📑 Reports →Sign in to watch

What this business does

Primary activity: Engineering design activities for industrial process and production

Sector: Professional, scientific & technical

Investor take

Pursue

Active trading company with a 62-year-old founder — textbook succession opportunity.

Opportunity 77/100 (strong), bankability 85/100. Strong seller-intent signal (60/100, director aged 62). Share purchase looks the cleaner deal structure. Most likely exit: share sale to pe / searcher (65/100).

🏦

Refinance opportunity

2 live charges · 2 lenders · oldest 17.2y

70/100

ready

Refinance conversation should be productive — structure clean and timing right.

· Oldest live charge is 17.2 years old — likely at or near maturity.
· Two lenders — manageable, but coordination required.
· Legal-friction score 20/100 — clean.

Data confidence

Overall: medium (61/100)

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

No iXBRL financials extracted

Lenders & charges

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

Directors & officers

35 officers (6 active, 35 linked, 26 with DOB)

Ownership & PSC

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

Director network

15 connected companies via shared directors

Filing history

156 filings on record

Gazette notices

No matching gazette notices (standard for active companies)

Opportunity Score

77/100Strong

PassWatchWorth a lookStrongExceptional

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

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.

Recent activity

Last 30 days

filing

• 1 officers

Last 90 days

filings

• 7 officers

Last 180 days

filings

• 7 officers

Counts from Companies House filing history.

Corporate timeline (90 events)Click to expand

2026-07-02
📄
change-person-director-company-with-change-date
officers · CH01
2026-06-18
📄
termination-director-company-with-name-termination-date
officers · TM01
2026-06-12
➖
SUTER, Philip Charles Anthony resigned
director
2026-05-21
➕
MORRIS, Paul Anthony appointed
director
2026-05-21
➕
MUMFORD, Peter Leslie appointed
director
2026-05-21
➕
TAYLOR, Susannah Natalie appointed
director
2026-05-21
➕
WILLCOCK, Jonathan Kevin appointed
director
2026-05-21
➕
WILLIS, Helen Margaret appointed
director
2026-05-21
📄
appoint-person-director-company-with-name-date
officers · AP01
2026-05-21
📄
appoint-person-director-company-with-name-date
officers · AP01
2026-05-21
📄
appoint-person-director-company-with-name-date
officers · AP01
2026-05-21
📄
appoint-person-director-company-with-name-date
officers · AP01
2026-05-21
📄
appoint-person-director-company-with-name-date
officers · AP01
2025-11-05
📄
termination-director-company-with-name-termination-date
officers · TM01
2025-11-03
➖
WHITE, Samuel Michael resigned
director
2025-07-16
📄
accounts-with-accounts-type-audit-exemption-subsiduary
accounts · AA
2025-05-29
📄
legacy
accounts · PARENT_ACC
2025-05-29
📄
legacy
other · GUARANTEE2
2025-05-29
📄
legacy
other · AGREEMENT2
2025-04-15
📄
change-person-director-company-with-change-date
officers · CH01
2025-01-15
📍
change-registered-office-address-company-with-date-old-address-new-address
address · AD01
2024-08-05
📄
change-to-a-person-with-significant-control
persons-with-significant-control · PSC05
2024-06-19
📄
accounts-with-accounts-type-full
accounts · AA
2024-06-19
📄
legacy
accounts · PARENT_ACC
2024-06-19
📄
legacy
other · AGREEMENT2
2024-06-19
📄
legacy
other · GUARANTEE2
2024-06-16
📄
legacy
other · AGREEMENT2
2023-06-01
📄
accounts-with-accounts-type-full
accounts · AA
2022-07-05
➕
GEOGHEGAN, Nicole Ann appointed
secretary
2022-07-05
➖
HARRIS, Sharon resigned
secretary
2022-03-18
➖
HUNTER, Martin David resigned
director
2022-03-18
➕
SUTER, Philip Charles Anthony appointed
director
2022-01-04
➕
WHITE, Samuel Michael appointed
director
2021-12-31
➖
MAYHEW, Maxine Eleanor, Dr resigned
director
2020-12-18
➖
ATKINSON, Mark Roger resigned
director
2020-12-18
➕
HUNTER, Martin David appointed
director
2020-09-01
➕
HARRIS, Sharon appointed
secretary
2020-09-01
➖
WOOD, Tracey Alison resigned
secretary
2020-04-06
➕
MAYHEW, Maxine Eleanor, Dr appointed
director
2020-04-06
➖
SHORE, Gerard Nikolas resigned
director
2020-04-06
➖
VAUGHAN, Alexander John resigned
director
2018-12-07
🔓
Charge satisfied #2
2018-12-07
🔓
Charge satisfied #1
2018-06-30
➖
HARRIS, Matthew James resigned
director
2017-05-02
➕
ATKINSON, Mark Roger appointed
director
2017-05-02
➕
SHORE, Gerard Nikolas appointed
director
2017-02-15
➖
MACKAY, Frazer Stuart resigned
director
2016-12-31
➖
KIRKBRIDE, Peter resigned
director
2016-11-30
➖
GARTON, Jonathan Hugh Leslie resigned
director
2015-05-22
➕
MACKAY, Frazer Stuart appointed
director

Showing most recent 50 of 90 events

Owner dependency

48/100

Moderate — manageable with handover

Some founder dependency, but not acute. A structured handover period should cover most risk.

FACTORS

-5 active directors: Broader management team in place — suggests transferable governance.
+Senior director age: Director aged approximately 62 — approaching natural succession window.

Succession & seller-readiness

40/100

Moderate signal

Some succession indicators present. Worth watching; approach if sector/strategy fits.

SIGNALS

secondaryFounder aged 58+: Senior director is approximately 62. Early succession window.

Red flags

1 med ·

2 director resignations in last 12 months

medium

Multiple recent departures can indicate governance disagreement, succession event, or preparation for sale/stress.

Evidence: SUTER, Philip Charles Anthony resigned 2026-06-12; WHITE, Samuel Michael resigned 2025-11-03

Group structure

Costain Limited is the ultimate parent — holding 75%+ shares. This company sits inside their group.

🏛️

Costain Limited

Corporate parent · holds 75-100% shares · board control

ultimate parent

⬇

COSTAIN UPSTREAM LIMITED

This company · SC336371

Parent relationships inferred from Persons with Significant Control filings. Full subsidiary tree requires reverse-lookup (coming).

Shareholders & ownership

1 active beneficial owner · dominant holder ≥75%

Name	Shares	Voting rights	Nature of control	Notified
Costain Limited Corporate entity	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.

🔒Co-director network graph

Radial SVG graph showing every company connected via shared directors, colour-coded by status.

Available from the Pro tier upwards.

See pricing →

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

🔒Tailored diligence questions

6 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

Incorporated2008-01-18

Jurisdictionscotland

Primary SIC71121 — Engineering design activities for industrial process and production

Registered office

Neo House

Riverside

Aberdeen

Scotland

AB11 7LH

Scotland

Filing status

Accounts

Next due: 2026-09-30

Last made up to: 2024-12-31

Confirmation statement

Next due: 2027-01-26

Last: 2026-01-12