Well Sekirei was good, I did complete both the seasons anime, unfortunately i am not following the manga as i have loads of stuff to finish on my list cough (@May) list.
Sorry to be the bearer of bad news as i was following and lurking the mod of Funimation clearly stated that Funimation has no plans of season 3 as of now.
Quote from SpacemanHardy @Funimation
It seemed like this show was coming under the Rosario+Vampire curse, so I suppose it's time for one of these topics here too.
For all Sekirei fans who are either wishing FUNimation would make a third season of the show, wanting FUNi to influence the Japanese to make another season, or are wanting people to sign a petition to get a third season made, please read the following:
FUNimation does not make anime. They only license what's available from Japan. If it doesn't exist in Japan, then FUNimation cannot localize it.
Sekirei sold reasonably well in Japan. However, there are no plans at this time for a third season. It's possible that there might indeed be a third season in the future, but as of yet there is no official news. And considering that it's been four years since the end of season 2, it's starting to look more and more unlikely that there will be.
Petitions for the creation of a third season will not work. They do absolutely nothing here in the States, and they won't do anything in Japan. It doesn't matter if you get 10,000 signatures or not; the Japanese are first and foremost interested in selling to Japan, not North America. They make significantly more money from Japanese DVD/BD sales than from North American sales. If Japan doesn't have any plans for a third season, then a simple petition isn't going to change their minds.
Sorry folks, but for the time being, IT AIN'T HAPPENIN'. If you simply can't live without more Sekirei, go read the manga.
I do hope that japanese production decide to move forward season 3 project!
Source : http://www.funimation.com/forum/showthread.php?3135-**Do-NOT-Request-Sekirei-Season-3**&p=19441&viewfull=1#post19441