Diluted-Average-Shares Time Series for International Distributions Services PLC. International Distribution Services plc, together with its subsidiaries, operates as a universal postal service provider in the United Kingdom and internationally. The company offers parcels and letter delivery services under the Royal Mail and Parcelforce Worldwide brands. It also provides services for the collection, sorting, and delivery of parcels and letters. In addition, the company operates ground-based parcel delivery networks in Europe that covers 40 countries and nation states. Further, it provides express parcel delivery and logistics services. Additionally, the company engages in property holdings and facilities management activities. It serves consumers, sole traders, SMEs, large businesses and retailers, and other postal operators. The company was formerly known as International Distributions Services plc and changed its name International Distribution Services plc in May 2024. International Distribution Services plc was founded in 1516 and is based in London, the United Kingdom.

The same-day delivery market is projected to witness substantial growth over the forecast period, expanding from $312.85 billion in 2025 to $3,285 billion by 2033, exhibiting a CAGR of 37.6%. This exponential growth can be attributed to the increasing adoption of e-commerce and the rise of on-demand services. The market is further segmented based on type (B2B, B2C) and application (food, consumer). The B2B segment is expected to dominate the market due to the growing need for efficient supply chain management and last-mile delivery services. The food segment is also anticipated to witness significant growth due to the increasing demand for convenient and fast delivery of food items. Key drivers of the same-day delivery market include the growing popularity of e-commerce, the increasing adoption of mobile devices, and the rising demand for convenience. However, factors such as high delivery costs and operational challenges pose challenges to the market's growth. Major companies operating in the market include A-1 Express, DHL, FedEx, TForce Final Mile, UPS, USA Couriers, American Expediting, Aramex, Deliv, Express Courier, LaserShip, Parcelforce Worldwide, NAPAREX, Power Link Delivery, Prestige Delivery, and CitySprint. The market is geographically segmented into North America, South America, Europe, the Middle East & Africa, and Asia Pacific. North America is expected to account for the largest share of the market, followed by Europe. Asia Pacific is projected to witness the highest growth rate during the forecast period due to the rapidly growing e-commerce sector in the region.

Same-day delivery services have emerged as a critical component of the global logistics and transportation landscape. With rising consumer expectations for speedy and convenient delivery, this industry is poised for significant growth in the coming years.