NEW YORK (TheStreet) -- Today on StockTwits, everyone is talking about mergers and acquisitions. It looks like a sign that the M&A market is heating up. Here are three potentially huge M&A deals that are breaking news this morning:

1. Pfizer (PFE - Get Report) wants to acquire AstraZeneca  (AZN - Get Report) in a massive deal worth $100 billion.

BREAKING: Pfizer says plans renewed push to purchase Astrazeneca $PFE $AZN

-- JJ (@JJSinghSTARR) Apr. 27 at 10:00 PM

I want a new drug. $AZN up 17% #premarket as $PFE shows it really, really, really wants to buy the company.

-- Paul La Monica (@lamonicabuzz) Apr. 28 at 07:49 AM

2. Forest Labs (FRX) is set to acquire Furiex Pharma (FURX) in a deal worth roughly $1.5 billion.

And the M&A party continues: Forest Labs to buy Furiex Pharmaceuticals for $1.46B in cash and rights $FRX $FURX

-- Darcy Keith (@eyeonequities) Apr. 28 at 07:21 AM

Welcome to Merger Monday: $ETP & $SUSS, $FRX & $FURX, $PFE & $AZN

-- Ben Silverberg (@silverjet2) Apr. 28 at 08:43 AM

3. Energy Transfer Partners  (ETP) will acquire Susser Holdings (SUSS) for nearly $2 billion.

The part of $SUSS that everyone was ignoring was the MLP & IDR's & that is the reason for the bid

-- Tsachy Mishal (@CapitalObserver) Apr. 28 at 07:13 AM

Energy Transfer $ETP to Acquire Susser $SUSS in $1.8B Deal

-- StreetInsider (@Street_Insider) Apr. 28 at 07:56 AM

While $ETP will be issuing units to acquire $SUSS, it will sell the $SUSP IDR's to $ETE & retire units. On net could be close to a wash

-- Tsachy Mishal (@CapitalObserver) Apr. 28

For more on these deals and others, follow Stefan Cheplick on Twitter and StockTwits.

At the time of publication, the author held no positions in any of the stocks mentioned.

This article represents the opinion of a contributor and not necessarily that of TheStreet or its editorial staff.