Everyone, we have a short presentation from Castellum because we have now changed our bid on Entra and done another activity as well. It's just been done, approximately published 10 minutes ago, so I will go a little bit slow in the beginning so everyone can have the time to come in. We can take the next slide, please. What we are now announcing is two things. We are, first of all, reversing our offer on Entra. That offer now includes that we issue eight new Castellum shares for every thirteen Entra shares. One, three, thirteen Entra shares. Plus a cash component of 54.4 NOK, Norwegian crowns. This means that we have a stock of 71% and 29% cash consideration. It also includes, of course, a mix-and-match facility in there. This first offer equals to, per Entra share, 185 crowns Castellum.
The synergies that we will come back to of SEK 16. Plus that, we also have an impact on the next item where we're doing right now. We have also signed a contract with Blackstone to sell a large logistic and warehouse and light industry portfolio in Sweden in the existing Castellum portfolio for SEK 19 billion. That is 20% premium to the last reported value. This sale comes in two portions. First of all, a portion of SEK 5 billion, meaning that 39 assets that we directly sell. 13 billion, which will be completed if we succeed in the completion of entering as owner to Entra. This value uplift is the same as SEK 8 per Castellum shares at this moment.
Even if we sell a lot of the warehouse and logistics and light industry, we still have a good platform for the future in the logistics. We have, as I will show you later, we have all the developments left in the existing Castellum portfolio. We are very pleased because we're announcing now that we're doing the sales of all these assets, and then also have the offer increased to the shareholders of Entra. We can take the next slide, please. What does this mean then? First of all, it's almost a 30% increase on premium of Entra's undisturbed share price. It's also that we can build something that's much stronger together. We are stating the same thing that we stated a month ago. We really would like to merge these two companies into something that has not been created before in the Nordics.
Some office portfolio that is strong, fantastic, and with the best opportunities going forward. This portfolio will now include assets for SEK 132 billion. Doing this, we will also be able of crystallizing synergies for approximately SEK 300 million. We will on top of that be able of looking to the rating of the new target and getting a higher rating than Castellum has today that gives us this part of the synergies. Simply an opportunity that we can't miss. This large commercial real estate company in the Nordic region definitely would be number one in size. It will also hold 40% of its income from the public sector. When we talk public sector here, don't do any mistakes. This is government income we're talking about, more or less 100%. On top of that, we then have the development portfolio of approximately 1 million square meters.
This is what we like to do. We would like to merge the two blue-chip culture and the top companies in the Nordics. We would like to continue being sustainable and us actually being the sustainable champion and being part of all that we have already started on each side today. If we continue and take the next slide, please. You can see what we're doing with, of course, the premium, what I will do with the 20%. The yield on the sales is approximately 4.7%. As I said, it's mixed into two portions. The first tranche is existing of 39 properties, sold for approximately SEK 5 billion. The second tranche will be conditional on the completion on the offer on Entra. Totally, this adds up to 214 assets. We can take the next slide, please.
We also then keeping, as I said, the logistics and warehouse part of the portfolio. The future will give us the opportunity to create another 1 million sq m, and we'll keep still this 362 sq m assets, that we already own in the nearby of Gothenburg and Stockholm. This will give us the future to continue to grow on NAV and also serve the logistics sector with what is needed for the future. To summarize, if we take the next slide, please. We have the same objective that we had one month ago when we entered the market with this news. We would like to merge one of the two best companies on the office side in the Nordics. We would like to create something that's not been created before. We would like to take care of the synergies and create value for the shareholders.
Simply brings the strongest listed balance sheet in the Nordics to continue forward on a sustainable and a new tech era. that is our objective, and we hope this will be pleased to the shareholders of both Castellum and Entra. Thank you very much. I leave for questions.