Nasdaq OMX was not all "Mergers & Acquisitions last week.    Below are 10 rule filings submitted to the SEC.

NASDAQ Rule Filing 11-051, 4/8/11.   Notice of Filing and Immediate Effectiveness of ... Proposed Rule Change to Modify the Effective Hours of Rule 4753(c). 

NASDAQ Rule Filing 11-050, 4/8/11.   ... Proposed Rule Change to Modify an Initial Listing Standard for the Nasdaq Global Select Market.

NASDAQ Rule Filing 11-047, 4/8/11.   ... Proposed Rule Change to Conform Rules 2360, 2361, 2370, 6951 to FINRA Rule Changes.

NASDAQ Rule Filing 10-134, 4/8/11.   ... Notice of Designation of Longer Time Period for Commission Action on Proceedings to Determine Whether to Approve or Disapprove Proposed Rule Change to Adopt Additional Criteria for Listing Commodity Stockpiling Companies That Have Indicated That Their Business Plan is to Buy and Hold Commodities. 

NASDAQ Rule Filing 11-048, 4/7/11.   ... Proposed Rule Change to Modify Fees for Members Using the NASDAQ Market Center

NASDAQ Rule Filing 11-043, 4/7/11.   ... Proposed Rule Change to Extend the Pilot Period of Amendments to the Clearly Erroneous Rule.

NASDAQ Rule Filing 11-045, 4/6.   ... Proposed Rule Change to Amend NASDAQ Rule 3011 to Reflect Changes to a Corresponding FINRA Rule

NASDAQ Rule Filing 11-046, 4/6.   ... Proposed Rule Change Relating to Rebates and Fees in Penny Pilot and Non-Penny Pilot Options.

NASDAQ Rule Filing 11-044, 4/5.   ... Proposed Rule Change to Extend Fee Pilot Program for NASDAQ Last Sale.

NASDAQ Rule filing 11-042, 4/4.   ... Proposed Rule Change to Extend the Pilot Period of the Trading Pause for Individual Stocks Contained in the S&P 500 Index, Russell 1000 Index, and Specified Exchange Traded Products that Experience a Price Change of 10% or More During a 5-Minute Period.

To access all these rule filings, go to:   [SEC.gov]