Teleflex's (TFX) - Get Teleflex Incorporated Report plans to acquire medical device manufacturer Arrow International ( ARRO) are a boon for several mutual funds.

The announcement sent Arrow's stock up 17.02%, to $44.21 Monday. That's just shy of the $45.50 per share that Teleflex has offered to pay for the Reading, Pa., maker of catheter-based products used in cardiac and critical care.

That pop was good news for investors in the

(UMLCX)

Excelsior Small Cap fund (UMLCX), which had 2.22% of its assets in Arrow at the end of May, according to fund tracker Morningstar. Other beneficiaries included

(BNCIX)

BNY Hamilton Small Cap Core Equity (BNCIX) which allocated 1.83% to Arrow at the end of March, and

(ALSIX) - Get AMG River Road Long-Short I Report

American Century Life Sciences (ALSIX), with 1.67%.

Neuberger Berman's

(NBGNX) - Get Neuberger Berman Genesis Inv Report

Genesis fund saw a nice gain, as the holder of 6.29% of Arrow's stock at the end of March.

Funds holding Teleflex didn't get the same boost; the stock was virtually unchanged Monday, closing at $85.33, for a 0.03% gain.

Elsewhere on a merger-manic Monday,

Transocean

(RIG) - Get Transocean Ltd. Report

, the world's largest offshore drilling contractor, said it had agreed to purchase its smaller competitor,

GlobalSantaFe

(GSF)

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, creating a company with a combined enterprise value of $53 billion.

Transocean's stock price closed up 5.47% at $115.99, while GlobalSantaFe rose 3.59%, to $78.33.

Fidelity's

(FSESX) - Get Fidelity Select Energy Svcs Report

Select Energy fund has the biggest allocation to either stock of any mutual fund tracked by Morningstar. As of the end of February, it held 5.83% of its total assets in Transocean and 4.74% in GlobalSantaFe.

Other funds with large portions of total assets committed to GlobalSantaFe include

(FNARX) - Get Fidelity Select Natural Resources Report

Fidelity Select Natural Resources, with a 4.71% allocation as of Feb. 28,

(NRVCX)

New River Core Equity, with a 4.44% allocation as of as of the end of May, and

(SYMBOL)

Fidelity Select Natural Gas, with a 4.02% allocation as of Feb. 28.

Transocean's biggest fans include

(RYESX) - Get Rydex Energy Services A Report

Rydex Energy Services (RYESX), with a 5.41% allocation at the end of June,

(JORDX)

Jordan Opportunity (JORDX), with 5.39% at the end of March, and

(MVRGX) - Get Monteagle Value I Report

Monteagle Value (MVRGX), with 5.18% as of the end of February.