# TSK engineering group financial and legal developments > Developing situation record from CLSTR: https://clstr.news/situations/tsk-engineering-group-financial-and-legal-developments > Updated: 2026-10-13T22:43:09.000Z. Sources: 5. Developments: 2. The Spanish engineering group TSK experienced significant volatility in its market performance due to contrasting financial developments. In September 2026, TSK shares rose by over 11% following positive analyst consensus and reports of a growing commercial pipeline. The company was reportedly negotiating strategic alliances to expand into the United States, specifically targeting energy transition and data center development projects. However, by October 2026, shares fell nearly 6% following a UK Commercial Court ruling. The court ordered Banco Santander to pay approximately €81 million in bank guarantees related to the Temane Combined Cycle Power Plant project in Mozambique. This dispute stems from TSK’s April 2025 termination of the contract, which the company attributed to force majeure caused by Cyclone Filipo. While TSK has initiated separate arbitration through the International Chamber of Commerce, the UK ruling overrode previous precautionary measures in Madrid intended to freeze the funds. ## Timeline ### 2026-10-13: TSK shares drop following €81 million bank guarantee ruling TSK shares dropped nearly 6% after a UK court ordered Banco Santander to pay €81 million in guarantees for a Mozambique power plant project disputed by the engineering firm. 3 sources. https://clstr.news/cluster/tsk-shares-drop-following-81-million-bank-guarantee-ruling ### 2026-09-17: TSK shares surge amid analyst optimism and U.S. expansion talks TSK shares surged over 11% following strong analyst recommendations and significant profit growth. The engineering firm is also negotiating a potential strategic alliance with Shikun & Binui for U.S. projects. 3 sources. https://clstr.news/cluster/tsk-shares-surge-amid-analyst-optimism-and-us-expansion-talks --- Cite as: TSK engineering group financial and legal developments. CLSTR, https://clstr.news/situations/tsk-engineering-group-financial-and-legal-developments