The book provides a complete analysis of European bloodstock sales in 2025 for all foals, yearlings and older horses in Britain, Ireland, France, Germany and Italy. It also includes foals and yearlings either foaled in Europe or by European-based sires at the major auctions in North America and Japan.

Furthermore, the Bloodstock Sales Review features comprehensive overviews of the trading year for Tattersalls, Goffs, Tattersalls Ireland and Arqana, as well as tables of the leading sires of 2025 by yearling average, lists of the year’s most expensive yearlings and foals, and a roll of top historical auction prices.

To mark the publication of the book, we compiled a top ten of the most profitable British and Irish-based yearling sires last year.

We have worked out each sires’ profitability index by dividing their 2025 yearling average by their covering fee of 2023, when the offspring in question were conceived.

In eighth place...

Night Of Thunder

2025 yearling ave: 407,237gns/€517,394

2023 covering fee: €100,000

Profitability index: 5.17

The most expensive stallions don’t usually muster the biggest profitability indices, as a lower multiple of their larger covering fee still equates to a huge financial gain for their supporters, but Night Of Thunder has made it onto this list thanks to his yearlings bred off a €100,000 fee selling for a fabulous average of €517,394 (407,237gns) in 2025.

It’s no wonder that Kildangan Stud’s son of Dubawi was in such strong demand, as he delivered a bundle of black-type winners last term, led by top-level scorers Desert Flower, Gewan and Ombudsman, to be crowned Britain and Ireland’s champion sire.

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