UPDATE 1-Turkish Koc Holding Q3 net profit falls 43 pct

* Profit, sales lower on the year

* Largest revenue source Tupras saw net fall 34 pct in Q3 (Adds detail, background)

ISTANBUL, Nov 13 (Reuters) - Turkey's largest company, Koc Holding (KCHOL.IS), with activities from oil refining to banking, said its third-quarter net profit fell 43 percent as the recession bit into revenues.

Net profit fell to 466.4 million lira ($314.9 million) in the three-month period from 814 million lira in the same period last year.

Revenues from the company's interests, which include refiner Tupras (TUPRS.IS), auto manufacturers Tofas (TOASO.IS), Ford Otosan (FROTO.IS) and Yapi Kredi Bank (YKBNK.IS) fell to 11.49 billion lira from 14.41 billion lira a year earlier.

Turkey, which has been hard hit by the global economic crisis saw its economy shrink by 7 percent in the second quarter when Koc's profits fell 60 percent.

Net profit at Tupras, the largest source of revenue for the company, fell 34 percent to 280 million lira due to a fall in oil prices. Yapi Kredi's third quarter net also fell slightly on the year.

Of 12 analysts on Thomson I/B/E/S, five rated the stock a 'buy', two a 'strong buy', four 'hold', and one 'underperform'.

Shares in Koc Holding have risen 74 percent since the beginning of the year, underperforming the Istanbul Stock Exchange, up 81 percent during the same time period. (Editing by Will Waterman) ($1=1.481 lira)