SCHEDULE 13G

An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G
Under the Securities Exchange Act of 1934

(AMENDMENT NO. 1)

SIENTRA, INC.

(Name of Issuer)

COMMON STOCK, PAR VALUE $0.01 PER SHARE

(Title of Class of Securities)

82621J105

(CUSIP Number)

DECEMBER 31, 2019

(Date of event which requires filing of this statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

o Rule 13d-1(b)

þ Rule 13d-1(c)

o Rule 13d-1(d)

* 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 the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose 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).




CUSIP No.	82621J105	SCHEDULE 13G	Page	2	of	15



1	NAMES OF REPORTING PERSONS Integrated Core Strategies (US) LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) þ
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware



NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER -0-
	6	SHARED VOTING POWER 2,730,852 (See Item 4(a))
	7	SOLE DISPOSITIVE POWER -0-
	8	SHARED DISPOSITIVE POWER 2,730,852 (See Item 4(a))



9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,730,852 (See Item 4(a))
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.5%
12	TYPE OF REPORTING PERSON OO




CUSIP No.	82621J105	SCHEDULE 13G	Page	3	of	15



1	NAMES OF REPORTING PERSONS Integrated Assets II LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) þ
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands



NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER -0-
	6	SHARED VOTING POWER -0- (See Item 4(a))
	7	SOLE DISPOSITIVE POWER -0-
	8	SHARED DISPOSITIVE POWER -0- (See Item 4(a))



9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON -0- (See Item 4(a))
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0%
12	TYPE OF REPORTING PERSON OO




CUSIP No.	82621J105	SCHEDULE 13G	Page	4	of	15



1	NAMES OF REPORTING PERSONS Integrated Assets, Ltd.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) þ
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Cayman Islands



NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER -0-
	6	SHARED VOTING POWER 5,727 (See Item 4(a))
	7	SOLE DISPOSITIVE POWER -0-
	8	SHARED DISPOSITIVE POWER 5,727 (See Item 4(a))



9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,727 (See Item 4(a))
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0%
12	TYPE OF REPORTING PERSON CO




CUSIP No.	82621J105	SCHEDULE 13G	Page	5	of	15



1	NAMES OF REPORTING PERSONS Millennium International Management LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) þ
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware



NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER -0-
	6	SHARED VOTING POWER 5,727 (See Item 4(a))
	7	SOLE DISPOSITIVE POWER -0-
	8	SHARED DISPOSITIVE POWER 5,727 (See Item 4(a))



9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 5,727 (See Item 4(a))
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0.0%
12	TYPE OF REPORTING PERSON PN




CUSIP No.	82621J105	SCHEDULE 13G	Page	6	of	15



1	NAMES OF REPORTING PERSONS Millennium Management LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) þ
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware



NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER -0-
	6	SHARED VOTING POWER 2,736,579 (See Item 4(a))
	7	SOLE DISPOSITIVE POWER -0-
	8	SHARED DISPOSITIVE POWER 2,736,579 (See Item 4(a))



9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,736,579 (See Item 4(a))
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.5%
12	TYPE OF REPORTING PERSON OO




CUSIP No.	82621J105	SCHEDULE 13G	Page	7	of	15



1	NAMES OF REPORTING PERSONS Millennium Group Management LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) þ
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware



NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER -0-
	6	SHARED VOTING POWER 2,736,579 (See Item 4(a))
	7	SOLE DISPOSITIVE POWER -0-
	8	SHARED DISPOSITIVE POWER 2,736,579 (See Item 4(a))



9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,736,579 (See Item 4(a))
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.5%
12	TYPE OF REPORTING PERSON OO




CUSIP No.	82621J105	SCHEDULE 13G	Page	8	of	15



1	NAMES OF REPORTING PERSONS Israel A. Englander
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) o (b) þ
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION United States



NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	5	SOLE VOTING POWER -0-
	6	SHARED VOTING POWER 2,736,579 (See Item 4(a))
	7	SOLE DISPOSITIVE POWER -0-
	8	SHARED DISPOSITIVE POWER 2,736,579 (See Item 4(a))



9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,736,579 (See Item 4(a))
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES o
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.5%
12	TYPE OF REPORTING PERSON IN




CUSIP No.	82621J105	SCHEDULE 13G	Page	9	of	15



Item 1.
	(a)	Name of Issuer:

		Sientra, Inc., a Delaware corporation (the "Issuer").

	(b)	Address of Issuer’s Principal Executive Offices:

		420 South Fairview Avenue, Suite 200 Santa Barbara, California 93117

Item 2.	(a)	Name of Person Filing:
	(b)	Address of Principal Business Office:
	(c)	Citizenship:

		Integrated Core Strategies (US) LLC c/o Millennium Management LLC 666 Fifth Avenue New York, New York 10103 Citizenship: Delaware

		Integrated Assets II LLC c/o Millennium International Management LP 666 Fifth Avenue New York, New York 10103 Citizenship: Cayman Islands

		Integrated Assets, Ltd. c/o Millennium International Management LP 666 Fifth Avenue New York, New York 10103 Citizenship: Cayman Islands

		Millennium International Management LP 666 Fifth Avenue New York, New York 10103 Citizenship: Delaware

		Millennium Management LLC 666 Fifth Avenue New York, New York 10103 Citizenship: Delaware

		Millennium Group Management LLC 666 Fifth Avenue New York, New York 10103 Citizenship: Delaware

		Israel A. Englander c/o Millennium Management LLC 666 Fifth Avenue New York, New York 10103 Citizenship: United States

	(d)	Title of Class of Securities:

		common stock, par value $0.01 per share ("Common Stock")

	(e)	CUSIP Number:

		82621J105




CUSIP No.	82621J105	SCHEDULE 13G	Page	10	of	15

Item 3. If this statement is filed pursuant to Rule 13d-1(b), or 13d-2(b), check whether the person filing is a:



(a)	o	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);

(b)	o	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)	o	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)	o	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);

(e)	o	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);




CUSIP No.	82621J105	SCHEDULE 13G	Page	11	of	15




(g)	o	A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);



(h)	o	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)	o	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)	o	Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Item 4. Ownership

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a) Amount Beneficially Owned:

As of the close of business on December 31, 2019:

i) Integrated Core Strategies (US) LLC, a Delaware limited liability company ("Integrated Core Strategies"), beneficially owned 2,730,852 shares of the Issuer’s Common Stock (consisting of 2,584,452 shares of the Issuer’s Common Stock and listed options to purchase 146,400 shares of the Issuer’s Common Stock);

ii) Integrated Assets II LLC, a Cayman Islands limited liability company, no longer beneficially owned any shares of the Issuer’s Common Stock; and

iii) Integrated Assets, Ltd., an exempted company organized under the laws of the Cayman Islands ("Integrated Assets"), beneficially owned 5,727 shares of the Issuer’s Common Stock, which together with the shares of the Issuer’s Common Stock beneficially owned by Integrated Core Strategies represented 2,736,579 shares of the Issuer’s Common Stock or 5.5% of the Issuer’s Common Stock outstanding.

Millennium International Management LP, a Delaware limited partnership ("Millennium International Management"), is the investment manager to Integrated Assets and may be deemed to have shared voting control and investment discretion over securities owned by Integrated Assets.

Millennium Management LLC, a Delaware limited liability company ("Millennium Management"), is the general partner of the managing member of Integrated Core Strategies and may be deemed to have shared voting control and investment discretion over securities owned by Integrated Core Strategies. Millennium Management is also the general partner of the 100% owner of Integrated Assets and may also be deemed to have shared voting control and investment discretion over securities owned by Integrated Assets.

Millennium Group Management LLC, a Delaware limited liability company ("Millennium Group Management"), is the managing member of Millennium Management and may also be deemed to have shared voting control and investment discretion over securities owned by Integrated Core Strategies. Millennium Group Management is also the general partner of Millennium International Management and may also be deemed to have shared voting control and investment discretion over securities owned by Integrated Assets.

The managing member of Millennium Group Management is a trust of which Israel A. Englander, a United States citizen ("Mr. Englander"), currently serves as the sole voting trustee. Therefore, Mr. Englander may also be deemed to have shared voting control and investment discretion over securities owned by Integrated Core Strategies and Integrated Assets.

The foregoing should not be construed in and of itself as an admission by Millennium International Management, Millennium Management, Millennium Group Management or Mr. Englander as to beneficial ownership of the securities owned by Integrated Core Strategies or Integrated Assets, as the case may be.

(b) Percent of Class:

As of the close of business on December 31, 2019, Millennium Management, Millennium Group Management and Mr. Englander may be deemed to have beneficially owned 2,736,579 shares of the Issuer’s Common Stock or 5.5% of the Issuer’s Common Stock outstanding (see Item 4(a) above), which percentage was calculated based on 49,481,559 shares of the Issuer’s Common Stock outstanding as of November 1, 2019, as per the Issuer’s Form 10-Q dated November 7, 2019.




CUSIP No.	82621J105	SCHEDULE 13G	Page	12	of	15

(i) Sole power to vote or to direct the vote
-0-

(ii) Shared power to vote or to direct the vote

   2,736,579 (See Item 4(b))
(iii) Sole power to dispose or to direct the disposition of

   -0-

(iv) Shared power to dispose or to direct the disposition of

   2,736,579 (See Item 4(b))

Item 5. Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following o.

Item 6. Ownership of More than Five Percent on Behalf of Another Person.

Not applicable.

Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Not applicable.

Item 8. Identification and Classification of Members of the Group

See Exhibit I.

Item 9. Notice of Dissolution of Group

Not applicable.

Item 10. Certification

By signing below each of the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.




CUSIP No.	82621J105	SCHEDULE 13G	Page	13	of	15

Exhibits:

Exhibit I: Joint Filing Agreement, dated as of January 17, 2020, by and among Integrated Core Strategies (US) LLC, Integrated Assets II LLC, Integrated Assets, Ltd., Millennium International Management LP, Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander.

CUSIP No.

82621J105

SCHEDULE 13G
Page
14
of
15

SIGNATURE

After reasonable inquiry and to the best of its knowledge and belief, each of the undersigned certifies that the information with respect to it set forth in this statement is true, complete, and correct.

Dated: January 17, 2020

INTEGRATED CORE STRATEGIES (US) LLC

By: Integrated Holding Group LP,
       its Managing Member

By: Millennium Management LLC,
       its General Partner

By: /s/ Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

INTEGRATED ASSETS II LLC

By: Millennium International Management LP,
       its Investment Manager

By: /s/ Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

INTEGRATED ASSETS, LTD.

By: Millennium International Management LP,
       its Investment Manager

By: /s/ Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

MILLENNIUM INTERNATIONAL MANAGEMENT LP

By: /s/Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

MILLENNIUM MANAGEMENT LLC

By: /s/Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

MILLENNIUM GROUP MANAGEMENT LLC

By: /s/Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

/s/ Israel A. Englander

Israel A. Englander




CUSIP No.	82621J105	SCHEDULE 13G	Page	15	of	15

		EXHIBIT I

		JOINT FILING AGREEMENT

This will confirm the agreement by and among the undersigned that the Schedule 13G filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the Common Stock, par value $0.01 per share, of Sientra, Inc., a Delaware corporation, will be filed on behalf of each of the persons and entities named below in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated: January 17, 2020

INTEGRATED CORE STRATEGIES (US) LLC

By: Integrated Holding Group LP,
       its Managing Member

By: Millennium Management LLC,
       its General Partner

By: /s/ Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

INTEGRATED ASSETS II LLC

By: Millennium International Management LP,
       its Investment Manager

By: /s/ Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

INTEGRATED ASSETS, LTD.

By: Millennium International Management LP,
       its Investment Manager

By: /s/ Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

MILLENNIUM INTERNATIONAL MANAGEMENT LP

By: /s/Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

MILLENNIUM MANAGEMENT LLC

By: /s/Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

MILLENNIUM GROUP MANAGEMENT LLC

By: /s/Gil Raviv

Name: Gil Raviv
Title:  Global General Counsel

/s/ Israel A. Englander

Israel A. Englander