SoftBank Group stock trades at EUR 35.82 as OpenAI funding advances

Published on 09/30/2026 at 16:51 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

SoftBank Group stock was at EUR 35.82 at Lang & Schwarz on September 30, 2026, down 0.75 percent from EUR 36.09. OpenAI funding remains central.

SoftBank Group, JP3436100006, Illustration mit AI erstellt.

SoftBank Group stock (ISIN JP3436100006) was trading at EUR 35.82 at Lang & Schwarz on September 30, 2026, down 0.75 percent from the prior close of EUR 36.09. The market is weighing SoftBank's final USD 10.00 billion OpenAI investment tranche against the debt raised to fund it.

OpenAI funding sets the narrative

According to Investing.com on September 30, 2026, OpenAI was targeting a USD 30.00 billion fundraising round, adding a fresh valuation reference for SoftBank's large AI exposure. The report said SoftBank was positioned to hold about 13 percent of OpenAI by October 1, 2026, after the final investment tranche.

The central calculation is straightforward: the OpenAI position can raise the value of SoftBank's assets, but the financing creates a larger debt burden before that value is realized. For investors, the stock therefore reflects both an AI asset opportunity and a funding test.

Bond financing adds a counterweight

Reuters reported on September 21, 2026, that SoftBank launched USD 10.00 billion of dollar-denominated senior unsecured notes and EUR 1.00 billion of euro-denominated notes. The proceeds were intended to fund the USD 10.00 billion OpenAI payment expected to close on October 1, 2026, while replacing a USD 10.00 billion bridge facility.

Reuters also reported that Fitch assigned the proposed notes a BB+ rating and expected SoftBank's debt to rise as it financed committed investments. That detail gives the funding story a measurable risk marker: the capital plan is large, unsecured and directly tied to an unlisted AI asset.

Market value and trading range

The primary listing is SoftBank Group's Tokyo Stock Exchange line, where the September 30, 2026 quote was JPY 6,430.00. Finance market data put the company's market capitalization at JPY 36.6 trillion on the same date, while its 52-week range stood at JPY 3,365.00 to JPY 9,074.00.

The current Tokyo price was 29.14 percent below the 52-week high, a wider distance than the daily move in the euro quote. SoftBank's valuation story therefore depends less on one session and more on whether OpenAI exposure, Arm-related assets and financing costs move in the same direction.

SoftBank Group stock remains data driven

SoftBank Group stock was trading at EUR 35.82 at Lang & Schwarz on September 30, 2026 at 4:38 p.m. CEST, down 0.75 percent versus the Lang & Schwarz prior close of EUR 36.09 on September 29, 2026. SoftBank Group lists its Q1 FY2026 results date as August 6, 2026, providing the latest reported-period reference in its investor-relations calendar.