Banco Santander, S.A. 6-K filed 2026-09-10

Banco Santander filed a 6-K on 2026-09-10 carrying a Report of Other Relevant Information dated September 10, 2026. Its sole purpose is to disclose the bank's purchases of its own shares under the buyback programme approved by its Board of Directors, which was announced in a notice of inside information dated 10 August 2026 with official registry number 3336. This report covers the transactions carried out between 3 and 9 September, both inclusive. The cash amount of shares purchased under the programme to 9 September 2026 comes to 468,982,200 Euros, which the filing says represents approximately 25.7% of the maximum investment amount of the programme. The bank also states that with these purchases it has repurchased approximately 18.2% of its outstanding shares as of 2021. The report lists purchases of ordinary shares under ISIN ES0113900J37 across four trading venues, XMAD, CEUX, TQEX and AQEU, totalling 12,800,000 shares for the week, with a day by day breakdown in the filing and fuller transaction detail in an annex hosted on the bank's own website. For an analyst or journalist, the value here is the running pace of the programme and how much of its authorised size remains. The filing gives the percentage of the maximum investment amount consumed but not the maximum amount itself, and it does not state the programme's end date, its maximum number of shares, or what the bank intends to do with the repurchased stock. There is no financial or capital data in the report beyond the buyback figures. It is signed by Pedro de Mingo Kaminouchi, Head of Corporate Compliance. The filer is a Spanish commercial bank headquartered in Boadilla del Monte, Madrid, classified as a large accelerated filer, with shares trading under SAN on the NYSE and BCDRF over the counter.