EX-99.1

Exhibit 99.1
Joint Filer Information

Name:
   St. Paul Fire and Marine Insurance Company

Address:
   385 Washington Street
   St. Paul, MN 55102

Designated Filer:
   The St. Paul Travelers Companies, Inc.

Issuer & Trading Symbol:
   Dexcom, Inc. (DXCM)

Date of Event Requiring Statement:
   11/1/05

Signature:
   By:  /s/ Steven L.P. Schwen
   Its: Authorized Representative



Name:
   Split Rock Partners, LLC

Address:
   10400 Viking Drive, Suite 550
   Eden Prairie, MN 55344

Designated Filer:
   The St. Paul Travelers Companies, Inc.

Issuer & Trading Symbol:
   Dexcom, Inc. (DXCM)

Date of Event Requiring Statement:
   11/1/05

Signature:
   By:  /s/ Steven L.P. Schwen
   Its: Chief Financial Officer

EX-99.2

Exhibit 99.2
Footnote Disclosure

(1) Represents securities held directly by St. Paul Venture
Capital V, LLC, which is jointly managed by Split Rock Partners,
LLC and Vesbridge Partners, LLC.  Voting and investment power
over the shares, however, has been delegated solely to Split
Rock Partners, LLC.  Split Rock Partners, LLC has delegated
voting and investment decisions with respect to the shares to
four individuals who require a two-thirds vote to act.  St.
Paul Fire and Marine Insurance Company, a wholly owned
subsidiary of The St. Paul Travelers Companies, Inc., has the
right to appoint a majority of the members of the board of
directors of St. Paul Venture Capital V, LLC, and owns a
controlling interest of St. Paul Venture Capital V, LLC. Each
of Split Rock Partners, LLC, St. Paul Fire and Marine Insurance
Company and The St. Paul Travelers Companies, Inc. may be deemed
to be an indirect beneficial owner of the reported securities.
Each of Split Rock Partners, LLC, St. Paul Fire and Marine
Insurance Company and The St. Paul Travelers Companies, Inc.
disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This
report shall not be deemed an admission that any of the reporting
persons is the beneficial owner of such securities for purposes
of Section 16 or for any other purpose.

(2) Represents securities held directly by St. Paul Venture
Capital Affiliates Fund I, LLC, which is jointly managed by
Split Rock Partners, LLC and Vesbridge Partners, LLC. Voting
and investment power over the shares, however, has been delegated
solely to Split Rock Partners, LLC.  Split Rock Partners, LLC has
delegated voting and investment decisions with respect to the
shares to four individuals who require a two-thirds vote to act.
Split Rock Partners, LLC may be deemed to be an indirect beneficial
owner of the reported securities.  Split Rock Partners, LLC
disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This
report shall not be deemed an admission that any of the reporting
persons is the beneficial owner of such securities for purposes of
Section 16 or for any other purpose.

(3) In prior reports, 325,879 shares were reported as being held
indirectly through Windamere, LLC.  On November 1, 2005, Windamere,
LLC liquidated 17,504 shares to its members.  As part of this
distribution, St. Paul Fire and Marine Insurance Company received
directly 17,329 shares and SPVC Partners I, LLC received directly
138 shares.  As a result of the distribution, Windamere, LLC
holdings decreased from 325,879 to 308,375.

(4) Represents securities held directly by SPVC Partners I, LLC,
which is jointly managed by Split Rock Partners, LLC and Vesbridge
Partners, LLC. Voting and investment power over the shares, however,
has been delegated solely to Split Rock Partners, LLC.  Split Rock
Partners, LLC has delegated voting and investment decisions with
respect to the shares to four individuals who require a two-thirds
vote to act. Split Rock Partners, LLC may be deemed to be an indirect
beneficial owner of the reported securities.  Split Rock Partners,
LLC disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This report
shall not be deemed an admission that any of the reporting persons
is the beneficial owner of such securities for purposes of Section
16 or for any other purpose.

(5) Represents securities held directly by Windamere, LLC.  Voting
and investment power over the shares are generally held by the
managing member of Windamere, LLC; however, investments or
dispositions in excess of certain amounts must be approved by the
board of directors of Windamere, LLC.  Split Rock Partners, LLC has
the right to appoint a majority of the members of the board of
directors of Windamere, LLC.  St. Paul Fire and Marine Insurance
Company, a wholly owned subsidiary of The St. Paul Travelers
Companies, Inc., owns a controlling interest of Windamere, LLC.
 Each of Split Rock Partners, LLC, St. Paul Fire and Marine
Insurance Company and The St. Paul Travelers Companies, Inc. may
be deemed to be an indirect beneficial owner of the reported
securities.  Each of Split Rock Partners, LLC, St. Paul Fire and
Marine Insurance Company and The St. Paul Travelers Companies, Inc.
disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This
report shall not be deemed an admission that any of the reporting
persons is the beneficial owner of such securities for purposes of
Section 16 or for any other purpose.

(6) In prior reports, 990,877 shares were reported as being held
indirectly through Fog City Fund, LLC.  On November 1, 2005, Fog
City Fund, LLC liquidated 53,224 shares to its members.  As part
of this distribution, St. Paul Fire and Marine Insurance Company
received directly 52,691 shares, and SPVC Management VI, LLC
received directly 93 shares.  As a result of the distribution,
Fog City Fund, LLC holdings decreased from 990,877 to 937,653.

(7) Represents securities held directly by SPVC Management VI, LLC,
which is jointly managed by Split Rock Partners, LLC and Vesbridge
Partners, LLC. Voting and investment power over the shares, however,
has been delegated solely to Split Rock Partners, LLC.  Split Rock
Partners, LLC has delegated voting and investment decisions with
respect to the shares to four individuals who require a two-thirds
vote to act. Split Rock Partners, LLC may be deemed to be an indirect
beneficial owner of the reported securities.  Split Rock Partners,
LLC disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This report
shall not be deemed an admission that any of the reporting persons
is the beneficial owner of such securities for purposes of Section
16 or for any other purpose.

(8) Represents securities held directly by Fog City Fund, LLC.
 Voting and investment power over the shares are generally held
by the managing member of Fog City Fund, LLC; however, investments
or dispositions in excess of certain amounts must be approved by
the board of directors of Fog City Fund, LLC.  Split Rock Partners,
LLC has the right to appoint a majority of the members of the board
of directors of Fog City Fund, LLC.  St. Paul Fire and Marine
Insurance Company, a wholly owned subsidiary of The St. Paul
Travelers Companies, Inc., owns a controlling interest of Fog City
Fund, LLC.  Each of Split Rock Partners, LLC, St. Paul Fire and
Marine Insurance Company and The St. Paul Travelers Companies, Inc.
may be deemed to be an indirect beneficial owner of the reported
securities.  Each of Split Rock Partners, LLC, St. Paul Fire and
Marine Insurance Company and The St. Paul Travelers Companies, Inc.
disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This report
shall not be deemed an admission that any of the reporting persons
is the beneficial owner of such securities for purposes of Section
16 or for any other purpose.

(9) In prior reports, 407,581 shares were reported as being held
indirectly through Windamere II, LLC.  On November 1, 2005, Windamere
II, LLC liquidated 21,893 shares to its members.  As part of this
distribution, St. Paul Fire and Marine Insurance Company received
directly 21,674 shares, and SPVC Partners I, LLC received directly
46 shares.  As a result of the distribution, Windamere II, LLC
holdings decreased from 407,581 to 385,688.

(10) Represents securities held directly by Windamere II, LLC.
 Voting and investment power over the shares are generally held
by the managing member of Windamere II, LLC; however, investments
or dispositions in excess of certain amounts must be approved by
the board of directors of Windamere II, LLC.  Split Rock Partners,
LLC has the right to appoint a majority of the members of the board
of directors of Windamere II, LLC.  St. Paul Fire and Marine
Insurance Company, a wholly owned subsidiary of The St. Paul Travelers
Companies, Inc., owns a controlling interest of Windamere II, LLC.
 Each of Split Rock Partners, LLC, St. Paul Fire and Marine Insurance
Company and The St. Paul Travelers Companies, Inc. may be deemed to
be an indirect beneficial owner of the reported securities.  Each of
Split Rock Partners, LLC, St. Paul Fire and Marine Insurance Company
and The St. Paul Travelers Companies, Inc. disclaims any beneficial
ownership of the reported securities, except to the extent of any
pecuniary interest therein.  This report shall not be deemed an
admission that any of the reporting persons is the beneficial owner
of such securities for purposes of Section 16 or for any other purpose.

(11) Represents securities held directly by St. Paul Venture Capital
VI, LLC, which is jointly managed by Split Rock Partners, LLC and
Vesbridge Partners, LLC.  Voting and investment power over the shares,
however, has been delegated solely to Split Rock Partners, LLC.  Split
Rock Partners, LLC has delegated voting and investment decisions with
respect to the shares to four individuals who require a two-thirds
vote to act.  St. Paul Fire and Marine Insurance Company, a wholly
owned subsidiary of The St. Paul Travelers Companies, Inc., has the
right to appoint a majority of the members of the board of directors
of St. Paul Venture Capital VI, LLC, and owns a controlling interest
of St. Paul Venture Capital VI, LLC. Each of Split Rock Partners, LLC,
St. Paul Fire and Marine Insurance Company and The St. Paul Travelers
Companies, Inc. may be deemed to be an indirect beneficial owner of
the reported securities.  Each of Split Rock Partners, LLC, St. Paul
Fire and Marine Insurance Company and The St. Paul Travelers Companies,
Inc. disclaims any beneficial ownership of the reported securities,
except to the extent of any pecuniary interest therein.  This report
shall not be deemed an admission that any of the reporting persons
is the beneficial owner of such securities for purposes of Section
16 or for any other purpose.

(12) In prior reports, 188,921 shares were reported as being held
indirectly through Windamere III, LLC.  On November 1, 2005, Windamere
III, LLC liquidated 10,148 shares to its members.  As part of this
distribution, St. Paul Fire and Marine Insurance Company received
directly 10,046 shares, and SPVC Management VI, LLC received directly
18 shares.  As a result of the distribution, Windamere III, LLC
holdings decreased from 188,921 to 178,773.

(13) Represents securities held directly by Windamere III, LLC.
 Voting and investment power over the shares are generally held
by the managing member of Windamere III, LLC; however, investments
or dispositions in excess of certain amounts must be approved by
the board of directors of Windamere III, LLC.  Split Rock Partners,
LLC has the right to appoint a majority of the members of the board
of directors of Windamere III, LLC.  St. Paul Fire and Marine
Insurance Company, a wholly owned subsidiary of The St. Paul
Travelers Companies, Inc., owns a controlling interest of Windamere
III, LLC.  Each of Split Rock Partners, LLC, St. Paul Fire and Marine
Insurance Company and The St. Paul Travelers Companies, Inc. may be
deemed to be an indirect beneficial owner of the reported securities.
Each of Split Rock Partners, LLC, St. Paul Fire and Marine Insurance
Company and The St. Paul Travelers Companies, Inc. disclaims any
beneficial ownership of the reported securities, except to the extent
of any pecuniary interest therein.  This report shall not be deemed
an admission that any of the reporting persons is the beneficial
owner of such securities for purposes of Section 16 or for any other
purpose.