Ratings on (SCOR) (SRE) (TK) (TTI) Reiterated

Ratings on COMSCORE, Inc. (NASDAQ: SCOR), Sempra Energy (NYSE: SRE), Teekay Co. (NYSE: TK) and Tetra Technologies Incorporated (NYSE: TTI) were reiterated by analysts.

Deutsche Bank (NYSE:DB) reiterated a “buy” rating on COMSCORE, Inc. (SCOR).

Goldman Sachs (NYSE:GS) reiterated a “buy” rating on Sempra Energy (SRE).

Sterne Agee reiterated a “buy” rating on Teekay Co. (TK). They have a price target of $45.00 on the company.

Jefferies (NYSE:JEF) reiterated a “buy” rating on Tetra Technologies Incorporated (TTI). They have a price target of $17.00 on the company.

Biggest Winners (ELON) (DEO) (VRTX) (TTI) (CRM) on May 6

Among the winners on Friday, May 6, as measured by share price increases, were Echelon Corp. (ELON), Diageo Plc (DEO), Vertex Pharmaceutica (VRTX), Tetra Technologies (TTI) and Salesforce.Com Inc (CRM).

Echelon Corp. (ELON) was up $1.36, to close at $10.16, a gain of 15.45 percent.

Diageo Plc (DEO) jumped $1.36 on the day to close at $82.14, an increase of 1.68 percent.

Vertex Pharmaceutica (VRTX) rose $1.35 to close at $54.54, a boost of 2.54 percent.

Tetra Technologies (TTI) soared $1.35 to close the session at $13.98, a gain of 10.69 percent.

Salesforce.Com Inc (CRM) surged $1.35 to end the day at $132.32, climbing 1.03 percent.

NYSE Gainers (TTI) (ADY) (KV-A) (CBB) (ORN) 6-10 on May 6

The number five through six gainers - as measured by percentages Friday on the New York Stock Exchange - include Tetra Technologies, Inc. (NYSE:TTI), Feihe International, Inc. (NYSE:ADY), K-V Pharmaceutical Company (NYSE:KV-A), Cincinnati Bell, Inc. (NYSE:CBB) and Orion Marine Group, Inc. (NYSE:ORN).

Tetra Technologies, Inc. (TTI), in the sixth position, closed Friday at $11.99, gaining $1.10, or 10.10 percent.

Next was K-V Pharmaceutical Company (KV-A), which ended the session at $3.41, up $0.31, or 10.00 percent.

Cincinnati Bell, Inc. (CBB) closed at $3.23, jumping $0.29, or 9.86 percent.

Orion Marine Group, Inc. (ORN) rounded off the top ten gainers Friday, ending the day at $10.62, climbing 0.87, or 8.92 percent.

Tetra Tech (NASDAQ:TTEK) Has Room to Move Up Says Brean Murray Carret

After recently meeting with Tetra Tech's (NASDAQ:TTEK) CEO CEO, Dan Batrack, and the IR representative Jorge Casado, Brean Murray Carret & Co. said they came away even more bullish on the company than they had been.

They stated that, "despite the recent rise in the share price, we believe favorable tailwinds across much of the business model will lead to higher earnings revisions in coming quarters, and with it a higher share price."

Brean Murray Carret & Co. reiterates their "Buy" rating on Tetra Tech (TTEK), which closed Thursday at $24.75, gaining $0.10, or 0.41. Brean Murray Carret & Co. boosted their price target on Tetra Tech from $30 to $34.