Turkey's Biggest Company Can't Be Halal

Koç Holding — Turkey's largest industrial group, its top exporter, and the country's only Fortune Global 500 company — has 24.34% of its income classified as non-compliant with Islamic finance principles.

The cutoff for inclusion in Turkey's participation (Islamic) equity index is 5%.

That was not a complaint Koç filed with a regulator. It was a disclosure the holding published itself, as required, in its participation finance principles form. The form exists so Bursa İstanbul can decide, twice a year, which stocks interest-averse funds are allowed to buy. Koç didn't pass. It doesn't pass by a wide margin.

The basic point is that this isn't really about theology. It's about a classification boundary inside Turkish market plumbing that determines which capital pools can access the country's biggest company, and why the answer is no.

Turkey's government is actively trying to become a major player in participation finance — the country's name for Islamic finance. The finance minister, Mehmet Şimşek, has said publicly that Turkey wants to rank in the top five globally for Islamic financial assets. The Turkish Participation Banks Association (TKBB) maintains the standards, including a non-compliant income standard published in 2024 that lays out how institutions handle money derived from interest-based transactions. There are six participation banks in the country, a sukuk market, and a set of BIST participation indices (the Participation 30, 50, and 100) that act as eligibility filters for investors who avoid interest.

The filter has two prongs. One is business activity: banks doing conventional interest-based lending, alcohol producers, tobacco, gambling — those sectors are out. The other is financial ratios, even for otherwise permissible companies. Interest-based income, interest-bearing debt, and income from non-permissible activities must each stay below defined thresholds. The income threshold the Koç filing references is 5%.

Koç's participation finance disclosure form says its non-compliant income ratio is 24.34%. It also flags structural issues in its subsidiaries' corporate charters: Yapı Kredi's articles of incorporation allow traditional banking activities, and the charters of Ford Otosan, Tofaş, and Türk Traktör each contain provisions permitting joint ventures with commercial banks. Those clauses alone create a barrier, because they make the subsidiaries' activities structurally compatible with interest-based arrangements, even if the actual income from those arrangements isn't the primary problem.

The 24.34% number, meanwhile, is roughly five times the allowable limit. Even if Koç stripped every trace of interest-bearing activity from its operating subsidiaries tomorrow, its largest listed subsidiary — Yapı Kredi Bank — is a conventional interest-based bank. A holding company that owns a conventional bank is, for participation index purposes, in about the same position as a secular investor trying to qualify for a sin-stock-free portfolio while holding a stake in a casino.

The interesting part of this story is what the misalignment reveals about Turkey's capital market architecture.

Participation funds are real money. They're managed professionally, they follow the BIST eligibility list strictly, and they provide a channel for domestic savings that would otherwise sit idle or flow into government paper. When the government says it wants to be a top-five global Islamic finance player, it's not just talking about the six participation banks. It's talking about building an ecosystem where participation-compatible equity is a meaningful destination for capital.

But Turkey's largest holding company — which reported $36.4 billion in consolidated revenue and a 147% year-over-year jump in net profit for the first half of 2026 — is permanently excluded from that destination. Not because it's poorly managed, not because its earnings are weak, and not because it made a deliberate choice to avoid compliance. It's excluded because its legal structure and its subsidiary charters contain language that the index methodology treats as a binary disqualifier.

You can imagine the tiny dialogue at the index committee:

Reviewer: "Can we include Koç? It's the biggest company in the country." Methodology: "Its non-compliant income ratio is 24%. The limit is 5%. No." Reviewer: "But it's a diversified holding. The auto and consumer parts are fine." Methodology: "Its bank does conventional banking. No."

There's no discretion. The BIST participation index reviews run on a schedule — May and November — and the inclusion/exclusion lists are published mechanically. Koç hasn't been removed from the list; it was never on it. The latest periodic review in April 2026, which added and removed dozens of companies from the Participation 100, didn't mention Koç at all because there was nothing to change.

What Koç would have to do to qualify is not obvious. The non-compliant income ratio could come down if its conventional finance exposure shrank relative to its total revenue — but Yapı Kredi alone contributes about 23% of the holding's net asset value. The subsidiary charter clauses could theoretically be amended, but that would require board-level governance changes at multiple public subsidiaries, each with its own shareholder base. And even if the charters were cleaned up, the income from interest-bearing activities would still exist.

Koç's management didn't raise this at its H1 2026 analyst meeting. The finance segment updates focused entirely on Yapı Kredi's conventional metrics — net profit up 36%, return on tangible equity of 23.4%, an asset management unit sale to Azimut Holding for about $425 million. No one framed the participation index exclusion as a strategic problem or a capital constraint. The company's capital allocation memo was about organic growth, portfolio simplification, and maintaining its $989 million net cash position.

That absence is itself informative. For a company this size, the participation index exclusion is a structural fact of life, not an active priority. The holding's earnings power is broad enough and its conventional investor base is deep enough that being ineligible for participation funds doesn't move the needle on cost of capital or valuation.

But for someone thinking about Turkey's ambition to build a world-class participation finance ecosystem, the gap is meaningful. You can have six Shariah-compliant banks, a growing sukuk market, and government-level political commitment. You can also have the country's largest listed company permanently walled off from the participation equity index because its corporate charters were drafted before participation finance was a category investors cared about, and because owning a conventional bank in a conventional economy produces conventional income.

The structural misalignment the competitor headline references isn't a complaint. It's a math problem. The government wants participation capital to grow. The index methodology has a 5% threshold. Turkey's biggest company sits at 24%. The charters of the companies inside it contain clauses written in a different regulatory era.

The question isn't whether Koç is trying to break the rules. The question is whether Turkey's participation finance ecosystem can scale meaningfully when its own flagship company — by the logic of its own index — can't participate in it.

That's not a failure of Koç's strategy. It's a feature of how classification systems work: once you draw a bright line, everything on the wrong side of it is excluded, regardless of scale, importance, or the fact that the line was drawn before anyone thought this particular company would end up this big.