Grupo Aeroportuario del Centro Norte, S.A.B. de C.V. (NDAQ:OMAB)
S-1 Filing with the SEC
Mexican airport operator Grupo Aeroportuario del Centro Norte, commonly known by its trade name OMA, began trading today. The stock opened higher than predicted, at $22.08 after pricing at $18.00, above the expected $14.50 to $16.50 range. Grupo Aeroportuario del Centro Norte operates thirteen international airports in nine states of central and northern Mexico. OMA's airports also serve Monterrey, Mexico's third largest metropolitan area, a few tourist destinations, and nine other regional centers and border cities.

The New York Times Company (NYSE:NYT)
SEC Filing Watchlist
The New York Post reported today that Greenberg has made an effort to buy a controlling stake in the New York Times, in order to break the Sulzberger family's control of the company. Later, Greenberg's spokesman said he has no intentions of increasing his stake beyond his 100k shares; nevertheless, CNBC's Charlie Gasparino's follow-up reports on the story moved NYT up 7.5% in today's trading.

Wireless Ronin Technologies, Inc. (NDAQ:RNIN)
SB2-A Filing with the SEC
Shares of Wireless Ronin Technologies, a digital signage company, soared 57% today on its second day of trading with a volume of 5.5 million shares. Strangely, this move comes after the stock IPO'd yesterday at $4 per share, where it closed at $4.58 on volume of 1.6 million shares.