Being lazy and lacking only natural intelligence I cheated on my assignment and asked Google:

Which companies outside US are similar to BH in ethics and integrity of management, shareholder focused, avoid dilutive share issuance to employees and have a multi decade history of outperformance. They do not have to be insurance based or conglomerates.

Google AI response

Top Ex-US True Shareholder Compounders

Constellation Software (TSX: CSU):
Shareholder Alignment & Dilution: Led by Mark Leonard, a legendarily private and Buffett-like operator, Constellation has a strict zero equity-dilution policy. Their share count has remained completely flat at roughly 21.2 million shares for over 15 years.
Management & Ethics: Executive bonuses are heavily tied to Return on Invested Capital (ROIC). Uniquely, employees are required to use a portion of their cash bonuses to buy shares directly from the open market, aligning them with public shareholders without diluting existing owners.
Track Record: It is one of the greatest compounding machines in global history, delivering a staggeringly high CAGR of over 31% since its 2006 IPO.

Lifco AB (STO: LIFCO B) :

Shareholder Alignment & Dilution: Part of the Swedish "serial acquirer" ecosystem, Lifco focuses strictly on free cash flow generation and maximizing shareholder value. Dilution is virtually non-existent; equity is treated as a highly scarce resource.
Management & Ethics: Governed with extreme decentralization and corporate transparency. They avoid the standard corporate bloat, running a massive multi-subsidiary empire with a minuscule head-office staff.
Track Record: Over its multi-decade history (operating since 1946, listed publicly since 2014), Lifco has consistently beaten the broader European markets by prioritizing predictable, high-margin, defensive niche companies.

Halma plc (LSE: HLMA):

Shareholder Alignment & Dilution: Halma is a UK-based life-saving technology company that aggressively avoids diluting its owners to fund expansion. Growth is entirely self-funded through its own strong cash generation.
Management & Ethics: Deeply mission-driven. They focus exclusively on buying niche, ethical businesses centered on safety, health, and environmental protection. Management teams operate with absolute operational integrity and autonomous accountability.
Track Record: Halma has an incredible record of over 45 consecutive years of growing its dividend by 5% or more annually, providing steady, decade-spanning outperformance through multiple macroeconomic cycles.

I have heard wonderful things about Handlesbanken from the customer’s experience but don’t know about its record of investor returns.