Editor's Note: In this feature from Stockpickr, we highlight lists of stocks that have made new highs or lows or seen other unusual activity.

Rising on Unusual Volume

: Specialty pharmacy company

Option Care

(OPTN) - Get Report

soared 25% amid trading 46 times its average daily volume, after drugstore giant



said it agreed to buy the company for $19.50 a share or $850 million. Shares added $3.84 reaching $19.24.

Biggest % Gainers

: Australia-based oil and gas driller



surged 27% Monday after the company finalized a document pertaining to a new project in Papua New Guinea. If the document is signed by July 31, the company will keep its 4% interest rate, otherwise the rate jumps to 10%. Shares closed up $5.17 to $24.11.

52-Week Highs


Research In Motion

( RIMM) continued to make big gains after reporting stellar quarterly earnings last week. The company jumped 7% to an all-time high of $214.26, as the BlackBerry maker added $14.27 in Monday trading.

Biggest % Losers


Advanced Life Sciences


plunged 19% after it said "significant time will be required" before data from a second pivotal late-phase trial of cethromycin, its pneumonia treatment, become "known, analyzed and reported." The Woodridge, Ill.-based biopharmaceutical company dropped 52 cents to $2.15.

52-Week Lows

: Donald Trump's real estate company,

Trump Entertainment Resorts

( TRMP), dipped to a 52-week low of $10.49 after the company said it did not plan to sell itself. Shares fell 17%, or $2.09, Monday.

Latest Activist Situations

: Citadel disclosed that it raised its stake in


( COMS) to 9.8%, from 8.4%. In Monday trading, shares added 2 cents or half a percent, closing at $4.15.

Forum of the Day

With highflying stocks such as


(GOOG) - Get Report



(AAPL) - Get Report

and Research In Motion, is there a point to just say, "I missed it"?

Madeleine starts the discussion


Do You Know the Answer?


( KFT) said it offered $7.2 billion for the biscuit division of

Groupe Danone

( DA).

Is it worth it?

, Peter Winkler II asks.

Feeling Lucky?

And finally, try picking a random portfolio suited to do-it-yourselfers with more detailed analysis at

I'm Feeling Lucky


Stockpickr is a wholly owned subsidiary of TheStreet.com.