O'so Demanding is a 6 year old mare by Written Tycoon out of the Sebring mare, She's Demanding.
Last start was 8th at Northam on May 3, 2026 in the Zax And Co Hcp (C1) over 1300 metres.
Sale Details

Lot 170 2021 MM Gold Coast National Weanling Sale
Vendor: Woodside Park Stud, Nagambie, Vic
Buyer: Woodside Park Stud $100,000

Lot 221 2022 Inglis Premier Yearling Sale
Vendor: Morningside, Wahring
Buyer: Bjorn Baker Racing / Clarke Bloodstock (FBAA) $220,000

Lot 66 2025 Inglis May (Late) Online Sale
Vendor: Bjorn Baker Racing (as agent) Buyer: Tony Ferencakovic $11,000

Lot 152 2026 Inglis February (Late) Online Sale
Vendor: Steven Burton Buyer: J Hopperton $7,000