CUSIP NO. 875372104
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13D
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Page 1 of 11
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Schedule 13D
INFORMATION TO BE INCLUDED IN STATEMENTS
FILED PURSUANT TO RULES 13d-1 (a) AND AMENDMENTS THERETO FILED PURSUANT TO 13d-2 (a)
(Amendment No. 2)
Tandem Diabetes Care, Inc.
(Name of Issuer)
Common Stock, par value
$0.001
per share
(Title of Class of Securities)
875372104
(CUSIP Number)
Matthew T. Potter
c/o Delphi Ventures
160 Bovet Road, Suite #408
San Mateo, CA 94402
(650) 854-9650
COPY TO:
Christine Wichrowski, Esq.
c/o Gunderson Dettmer Stough Villeneuve
Franklin & Hachigian, LLP
1200 Seaport Boulevard, Redwood City, California
94063
(650) 321-2400
(Name, Address and Telephone Number of Person
Authorized to Receive Notices and Communications)
March 28, 2017
(Date of Event Which Requires Filing of
this Statement)
If the filing person
has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
¨
.
Note: Schedules filed
in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other
parties to whom copies are to be sent.
* The remainder of
this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class
of securities and for any subsequent amendment containing information which would alter disclosures provided in the cover page.
The information required
on the remainder of this cover page shall not be deemed to be “filed” for the purposes of Section 18 of the Securities
Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject
to all other provisions of the Act (however, see the Notes).
(Continued on following
pages)
CUSIP NO. 875372104
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13D
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Page 2 of 11
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1
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NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Delphi Ventures VIII, L.P. (“Delphi
VIII”)
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a)
¨
(b)
x
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3
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SEC USE ONLY
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4
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CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
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NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH REPORTING
PERSON
WITH
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5
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SOLE VOTING POWER
3,632,552 shares, except that Delphi Management Partners VIII, L.L.C. (“DMP VIII”), the general partner of Delphi VIII, may be deemed to have sole power to vote these shares, and James J. Bochnowski (“Bochnowski”), David L. Douglass (“Douglass”), Deepika R. Pakianathan (“Pakianathan”) and Douglas A. Roeder (“Roeder”), the managing members of DMP VIII, may be deemed to have shared power to vote these shares.
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6
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SHARED VOTING POWER
See response to row 5.
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7
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SOLE DISPOSITIVE POWER
3,632,552 shares, except that DMP VIII, the general partner of Delphi VIII, may be deemed to have sole power to dispose of these shares, and Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to dispose of these shares.
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8
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SHARED DISPOSITIVE POWER
See response to row 7.
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 3,632,552
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10
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CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
¨
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11
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
7.3%
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12
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TYPE OF REPORTING PERSON*
PN
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CUSIP NO. 875372104
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13D
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Page 3 of 11
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1
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NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Delphi BioInvestments VIII, L.P. (“DBI
VIII”)
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a)
¨
(b)
x
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3
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SEC USE ONLY
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4
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CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
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NUMBER
OF
SHARES
BENEFICIALLY
OWNED BY EACH REPORTING
PERSON
WITH
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5
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SOLE VOTING POWER
35,467 shares, except that DMP VIII, the general partner of DBI VIII, may be deemed to have sole power to vote these shares, and Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to vote these shares.
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6
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SHARED VOTING POWER
See response to row 5.
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7
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SOLE DISPOSITIVE POWER
35,467 shares, except that DMP VIII, the general partner of DBI VIII, may be deemed to have sole power to dispose of these shares, and Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to dispose of these shares.
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8
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SHARED DISPOSITIVE POWER
See response to row 7.
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 35,467
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10
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CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
¨
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11
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
0.1%
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12
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TYPE OF REPORTING PERSON*
PN
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CUSIP NO. 875372104
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13D
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Page 4 of 11
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1
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NAME OF REPORTING
SS OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
Delphi Management Partners VIII,
L.L.C. (“DMP VIII”)
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a)
¨
(b)
x
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3
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SEC USE ONLY
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4
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CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
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NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH REPORTING
PERSON
WITH
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5
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SOLE VOTING POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. DMP VIII is the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have sole voting power with respect to such shares, except Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to vote these shares.
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6
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SHARED VOTING POWER
See response to row 5.
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7
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SOLE DISPOSITIVE POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. DMP VIII is the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have sole power to dispose of these shares, except Bochnowski, Douglass, Pakianathan and Roeder, the managing members of DMP VIII, may be deemed to have shared power to dispose of these shares.
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8
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SHARED DISPOSITIVE POWER
See response to row 7.
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 3,668,019
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10
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CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
¨
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11
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
7.4%
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12
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TYPE OF REPORTING PERSON* OO
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CUSIP NO. 875372104
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13D
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Page 5 of 11
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1
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NAME OF REPORTING PERSON James J. Bochnowski (“Bochnowski”)
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a)
¨
(b)
x
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3
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SEC USE ONLY
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4
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CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen
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NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON
WITH
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5
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SOLE VOTING POWER
0 shares.
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6
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SHARED VOTING POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Bochnowski is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
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7
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SOLE DISPOSITIVE POWER
0 shares.
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8
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SHARED DISPOSITIVE POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Bochnowski is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 3,668,019
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10
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CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
¨
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11
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
7.4%
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12
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TYPE OF REPORTING PERSON* IN
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CUSIP NO. 875372104
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13D
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Page 6 of 11
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1
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NAME OF REPORTING PERSON David L. Douglass (“Douglass”)
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a)
¨
(b)
x
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3
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SEC USE ONLY
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4
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CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen
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NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON
WITH
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5
|
SOLE VOTING POWER
0 shares.
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6
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SHARED VOTING POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Douglass is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
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7
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SOLE DISPOSITIVE POWER
0 shares.
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8
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SHARED DISPOSITIVE POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Douglass is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 3,668,019
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10
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CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
¨
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11
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
7.4%
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12
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TYPE OF REPORTING PERSON* IN
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CUSIP NO. 875372104
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13D
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Page 7 of 11
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1
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NAME
OF REPORTING PERSON Deepika R. Pakianathan (“Pakianathan”)
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a)
¨
(b)
x
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3
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SEC USE ONLY
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4
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CITIZENSHIP OR PLACE OF ORGANIZATION U.S. Citizen
|
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON
WITH
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5
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SOLE VOTING POWER
0 shares.
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6
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SHARED VOTING POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Pakianathan is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
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7
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SOLE DISPOSITIVE POWER
0 shares.
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8
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SHARED DISPOSITIVE POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Pakianathan is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 3,668,019
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10
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CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
¨
|
11
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
7.4%
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12
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TYPE OF REPORTING PERSON* IN
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CUSIP NO. 875372104
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13D
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Page 8 of 11
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1
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NAME OF REPORTING PERSON Douglas A. Roeder (“Roeder”)
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2
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CHECK THE APPROPRIATE BOX IF A MEMBER OF A
GROUP*
(a)
¨
(b)
x
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3
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SEC USE ONLY
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4
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CITIZENSHIP
OR PLACE OF ORGANIZATION U.S.
Citizen
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NUMBER OF
SHARES
BENEFICIALLY
OWNED BY EACH
REPORTING
PERSON
WITH
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5
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SOLE VOTING POWER
59,500 shares, all of which are issuable to Roeder pursuant to outstanding options exercisable within 60 days of March 28, 2017.
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6
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SHARED VOTING POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Roeder is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to vote these shares.
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7
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SOLE DISPOSITIVE POWER
59,500 shares, all of which are issuable to Roeder pursuant to outstanding options exercisable within 60 days of March 28, 2017.
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8
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SHARED DISPOSITIVE POWER
3,668,019 shares, of which 3,632,552 shares are directly owned by Delphi VIII and 35,467 shares are directly owned by DBI VIII. Roeder is a managing member of DMP VIII, the general partner of each of Delphi VIII and DBI VIII, and may be deemed to have shared power to dispose of these shares.
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9
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AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
REPORTING PERSON 3,727,519
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10
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CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9)
EXCLUDES CERTAIN SHARES*
¨
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11
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PERCENT OF CLASS REPRESENTED BY AMOUNT IN
ROW 9
7.5%
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12
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TYPE OF REPORTING PERSON* IN
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CUSIP NO. 875372104
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13D
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Page 9 of 11
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ITEM 1.
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SECURITY AND ISSUER
.
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This Amendment No.
2 supplements and amends the Schedule 13D that was originally filed on November 13, 2013 and amended on March 17, 2015 (as amended,
the “Original Schedule 13D”) to reflect changes resulting solely from the impact of changes in the number of outstanding
shares of the common stock, par value $0.001 per share (the “Common Stock”), of Tandem Diabetes Care, Inc., a Delaware
corporation (the “Company”) in connection with a follow-on public offering (the “Follow-On Offering”).
Only those items that are hereby reported are amended; all other items reported in the Original Schedule 13D remain unchanged.
Information given in response to each item shall be deemed incorporated by reference in all other items, as applicable. Capitalized
terms not defined in this Amendment No. 2 have the meanings ascribed to them in the Original Schedule 13D. The Company’s
principal executive offices are located at 11045 Roselle Street, San Diego, California 92121.
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ITEM 2.
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IDENTITY AND BACKGROUND.
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Items 2(a)-(c) and 5(f) of the Original
Schedule 13D are hereby amended and restated in their entirety as follows:
(a-c, f) This Schedule
13D is being filed on behalf of: (i) Delphi Ventures VIII, L.P., a Delaware limited partnership (“Delphi VIII”), (ii)
Delphi BioInvestments VIII, L.P., a Delaware limited partnership (“DBI VIII”), (iii) Delphi Management Partners VIII,
L.L.C., a Delaware limited liability company (“DMP VIII”), and (iv) James J. Bochnowski (“Bochnowski”),
a citizen of the United States, (v) David L. Douglass (“Douglass”), a citizen of the United States, (vi) Deepika R.
Pakianathan (“Pakianathan”), a citizen of the United States, and (vii) Douglas A. Roeder (“Roeder”), a
citizen of the United States (the foregoing entities and individuals are collectively referred to as the “Reporting Persons”).
Delphi VIII and DBI VIII are venture capital
funds. DMP VIII is the general partner of each of Delphi VIII and DBI VIII. Bochnowski, Douglass, Pakianathan and Roeder are the
managing members of DMP VIII (collectively, the “Managing Members”). The principal business office of the Reporting
Persons is 16 Bovet Road, Suite #408, San Mateo, California 94402.
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ITEM 5.
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INTEREST IN SECURITIES OF THE ISSUER.
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Items 5(a) and 5(b) of the Original Schedule
13D are hereby amended and restated in their entirety as follows:
(a, b) Regarding
aggregate beneficial ownership, see Row 9 of the cover page of each Reporting Person. Regarding percentage beneficial ownership,
see Row 11 of the cover page of each Reporting Person, which is based on 49,839,650 shares of Common Stock outstanding as of April
20, 2017. Regarding sole power to vote shares, see Row 5 of the cover page of each Reporting Person. Regarding shared power to
vote shares, see Row 6 of the cover page of each Reporting Person. Regarding sole power to dispose of shares, see Row 7 of the
cover page of each Reporting Person. Regarding shared power to dispose of shares, see Row 8 of the cover page of each Reporting
Person. Although none of the Reporting Persons acquired any shares of Common Stock from the date of the Original Schedule 13D through
March 28, 2017 (the “Interim Period”), during the Interim Period there was a material change in the percentage of Common
Stock that the Reporting Persons are deemed to beneficially own as a result of the Follow-On Offering.
CUSIP NO. 875372104
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13D
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Page 10 of 11
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SIGNATURES
After reasonable inquiry and to the best of
my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Date: June 6, 2017
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DELPHI VENTURES VIII, L.P.
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By:
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Delphi Management Partners VIII, L.L.C.
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General Partner
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By:
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/s/ Matthew T. Potter
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Name: Matthew T. Potter
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Title: Chief Financial Officer/Attorney-In-Fact
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DELPHI BIOINVESTMENTS VIII, L.P.
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By:
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Delphi Management Partners VIII, L.L.C.
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General Partner
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By:
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/s/ Matthew T. Potter
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Name: Matthew T. Potter
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Title: Chief Financial Officer/Attorney-In-Fact
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DELPHI MANAGEMENT PARTNERS VIII, L.L.C.
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By:
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/s/ Matthew T. Potter
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Name: Matthew T. Potter
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Title: Chief Financial Officer/Attorney-In-Fact
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* Signed pursuant to a Power of Attorney
already on file with the appropriate agencies.
CUSIP NO. 875372104
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13D
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Page 11 of 11
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JAMES J. BOCHNOWSKI
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DAVID L. DOUGLASS
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DEEPIKA R. PAKIANATHAN
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DOUGLAS A. ROEDER
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By:
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/s/ Matthew T. Potter
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Name: Matthew T. Potter
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Title: Chief Financial Officer/Attorney-In-Fact
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* Signed pursuant to a Power of Attorney
already on file with the appropriate agencies.