LONDON, March 20 (Reuters) - Lawyers from Switzerland, the United States and UK are talking to a number of Credit Suisse (CSGN.S) Additional Tier 1 (AT1) bond holders about possible legal action after the state-backed rescue of Credit Suisse by UBS (UBSG.S) wiped out AT1 bonds, law firm Quinn Emanuel Urquhart & Sullivan said on Monday. Quinn Emanuel said it was in discussions with Credit Suisse AT1 bondholders representing a "significant percentage" of the total notional value the instruments. PIMCO had 3.49% of its 5.66 billion euro ($6.06 billion) GIS Capital Securities Fund in Credit Suisse AT1 bonds, the Morningstar data showed. Lazard Asset Management had 7.4% of its 1.45 billion euro Lazard Capital Fi SRI fund allocated to Credit Suisse AT1 debt. GAM's 1.15 billion euro Star Credit Opportunities fund's exposure to Credit Suisse AT1 debt was 4.81% at the end of last month, based on the Morningstar data.

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