UPDATE 1-Wellington Mmgt asked for documents by U.S.-report

* Bloomberg report Boston asset manager reviewing records

* Previously named as receiving research firm e-mail

BOSTON, Nov 23 (BestGrowthStock) – Wellington Management Co
received a request for documents from federal investigators
looking into insider trading, Bloomberg News reported Tuesday,
citing an unidentified source.

The probe is part of what is said to be the broadest
investigation by U.S. officials to date into insider dealing on
Wall Street. On Monday the Federal Bureau of Investigation
searched the offices of three hedge funds.

A Wellington spokeswoman declined to comment. The closely
held Boston asset manager was among three mutual fund firms
previously identified in media reports as having received an
email from a Portland, Oregon firm that specializes in
providing specialized research to investors.

In the email the firm described an approach by the FBI
seeking its cooperation in a broad investigation, the Wall
Street Journal reported.

Wellington had previously declined to comment on the email,
as did the two other fund firms named as receiving it, Janus
Capital Group Inc (JNS.N: ) and MFS Investment Management of
Boston.
(Reporting by Ross Kerber, editing by Gerald E. McCormick)

UPDATE 1-Wellington Mmgt asked for documents by U.S.-report