In this series, the TDN takes a look at notable successes of European-based sires in North America. This week's column is highlighted by the victory of Portfolio Duration at Tampa Bay Downs.
Night Of Thunder Filly Boasts Top Portfolio
Klaravich Stables' Portfolio Duration romped in a Tampa Bay maiden for Chad Brown on December 3 (video). Bred by Michael E. Wates, CBE, the three-year-old filly cost 185,000gns as a Tattersalls December weanling, and was later picked up by Mike Ryan for Seth Klarman's operation for 150,000gns out of Book 1 of the Tattersalls October Yearling Sale in 2023.
Second on debut at Tampa in August, the daughter of Shemya (Dansili) is a half-sister to G3 Derrinstown Stud Derby Trial victor Cormorant (Kingman) and colts by Palace Pier and Modern Games born in 2024 and 2025, respectively. Second dam Shemima (Dalakhani) won twice in France at group level and is a relative of G1 Prix du Jockey Club second Shamkiyr (Sea The Stars).
Champion sire elect Night Of Thunder has sired 16 winners from 25 runners in North America (64%). His five stakes winners there are led by Grade I winners Dynamic Pricing and Choisya.
Repeat Winner
Unconquerable Keen (Clodovil) was back in the winner's circle after the Stormy Liberal Stakes for the third year in a row at Del Mar on November 30 (video). The 2025 GII Twin Spires Turf Sprint third is owned by CYBT, Omar Aldabbagh and Michael Nentwig and trained by Phil D'Amato.
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