A lawyer couple in Istanbul sold nearly 4.85 billion lira of Katılımevim shares before investigators moved in, highlighting the scale of the suspected market manipulation now under criminal review and raising fresh questions about who benefited from the stock’s sharp run-up.
Katılımevim probe after 4.85 billion lira share sale
The alleged timing matters because it suggests the pair, Yasemin Yavuz Koçyiğit and Gökhan Koçyiğit, exited their positions before the probe and fund operation began, locking in 2.53 billion lira in net gains on a single name. For investors, that is the key red flag: a concentrated buy-and-sell pattern in one stock, followed by a rapid cash-out, is exactly the kind of flow that can distort prices, trap retail holders and trigger wider enforcement risk across the market.
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According to the investigation file, the couple invested 2.32 billion lira into Katılımevim shares over the past year and then liquidated the entire position for 4.85 billion lira. Gökhan Koçyiğit alone is said to have turned 1.864 billion lira into 3.924 billion lira, while Yasemin Yavuz Koçyiğit invested 456 million lira and received 930 million lira back.
The case is part of a broader Istanbul Chief Public Prosecutor’s Office investigation into irregular share sales, market fraud and a bourse fund network. Nineteen suspects who had completed police questioning were sent to court in a major operation, underscoring that the probe is now moving from transaction review to potential criminal accountability.
For the market, the immediate issue is confidence. When a stock becomes associated with suspicious concentrated flows and alleged pre-investigation exits, the damage can spread beyond the issuer to brokers, counterparties and other names linked to the same network. In a market environment already sensitive to volatility, enforcement actions can quickly cool speculative appetite and widen the discount investors demand for smaller, thinly traded shares.
The next catalyst is the outcome of the judicial process and any further asset freezes, detentions or trading restrictions tied to the case. If prosecutors broaden the inquiry, it could draw in additional beneficiaries and expose more of the financing chain behind the trades.
| Entity | Gains | Losses |
|---|---|---|
| Koçyiğit couple | ▲2.53 billion lira net profit | ▼Potential criminal exposure |
| Katılımevim shareholders | ▲None | ▼Price distortion risk |
| Regulators/prosecutors | ▲Enforcement leverage | ▼Market credibility pressure |
| Retail investors | ▲None | ▼Potentially trapped in manipulated stock |
