Our earnings release and supplemental package have been filed on a Form 8-K with the SEC, and both are also available on our website. Elliot will provide an update on our recent transaction activity, and Jeffrey will discuss our financial results and provide you with our updated 2026 guidance. Importantly, leases signed but not yet commenced now represents nearly $78 million of contractually obligated annualized base rents to be realized over the coming years, providing significant visibility on future growth. We're also thrilled to be experiencing strong demand across other core Bay Area submarkets.
Maple Plaza, our recent acquisition in Beverly Hills, is continuing to experience strong, broad-based demand from the financial services and media and entertainment sectors, notably surpassing our original expectations. In both cases, these assets benefited from the consistent demand we have seen across markets from owner users for well-located, high-quality real estate, driving a highly efficient execution for our shareholders. With proceeds from our first quarter dispositions, we elected to opportunistically capitalize on recent capital markets volatility, repurchasing approximately $73 million of stock at an average price of $30.80 per share. Looking forward, we'll continue to explore opportunities to harvest attractively priced capital from our existing portfolio while exploring the full range of redeployment alternatives available to us.
Over time, we've consistently captured meaningful rent growth at Crossing 900, re-leasing over 80,000 sq ft since the fourth quarter of 2023 at cash rent spreads up nearly 60%. Over the last several months, the capital markets have demonstrated continued momentum as buyers recognize the inflection in fundamentals and the positive impact AI is having on our markets. We determined these buildings would be good sales candidates given the lack of synergies with the office as well as the depth of demand for high quality apartments. As private capital returned to the office sector, Kilroy meaningfully ramped up sales efforts with a total of roughly $980 million of land and operating properties completed or under contract.