Exhibit 99.1

Sientra Reports Third Quarter 2020 Financial Results

Reports record Breast Products net sales of $15.3 million, representing 54% sequential growth and 21% year over year growth

Results driven by U.S. recovery and market outperformance in the core breast products segment

Santa Barbara, CA – November 09, 2020 – Sientra, Inc. (NASDAQ: SIEN) (“Sientra” or the “Company”), a diversified medical aesthetics company, today announced its financial results for the third quarter ended September 30, 2020.

Jeff Nugent, Sientra’s Chairman and Chief Executive Officer, said, “Sientra recorded exceptional results in Q3, posting 54% sequential quarter over quarter sales growth from Q2’20, despite the strong headwinds our business and the industry have faced from COVID-19.  The third quarter represented  significant improvement in net sales in our Breast Products segment. Our pivot to focus increasingly on our breast business has been validated by our third quarter results and has put us in a position of strength as we continue to take share from competitors. We believe our share gains have been driven by the durability of demand for our OPUS® breast implants and tissue expanders and by our ability to partner with customers through our Drive the Recovery initiatives.”

Mr. Nugent concluded, “Our miraDry business continued to perform in line with our expectations as we are now two quarters into our successful transition from a bifurcated sales model, and our refocus on high-margin bioTip sales.”

Third Quarter 2020 Financial Results

Key 2020 Business Highlights

2020 Financial Outlook

While the COVID-19 pandemic continues to pose a risk of uncertainty, given performance to date and visibility through the fourth quarter, the Company is reinstating guidance for full year 2020. The Company expects total net sales in the range of $63 million to $66 million, compared to sales of $83.7 million in 2019.

Conference Call

Sientra will hold a conference call today, November 09, 2020 at 4:30 pm ET to discuss third quarter results. The dial-in numbers are 844-464-3933 for domestic callers and 765-507-2612 for international callers. The conference ID is 6092021. A live webcast of the conference call will be available on the Investor Relations section of the Company's website at www.sientra.com. The webcast will be archived on the website following the completion of the call.  

Use of Non-GAAP Financial Measures

Sientra has supplemented its US GAAP net income (loss) with a non-GAAP measure of Adjusted EBITDA. Management believes that this non-GAAP financial measure provides useful supplemental information to management and investors regarding the performance of the Company, facilitates a more meaningful comparison of results for current periods with previous operating results, and assists management in analyzing future trends, making strategic and business decisions and establishing internal budgets and forecasts. A reconciliation of non-GAAP Adjusted EBITDA to GAAP net income (loss), the most directly comparable GAAP measure, is provided in the schedule below.

There are limitations in using this non-GAAP financial measure because it is not prepared in accordance with GAAP and may be different from non-GAAP financial measures used by other companies. This non-GAAP financial measure should not be considered in isolation or as a substitute for GAAP financial measures. Investors and potential investors should consider non-GAAP financial measures only in conjunction with Sientra’s financial statements prepared in accordance with GAAP and the reconciliations of the non-GAAP financial measure provided in the schedule below.

About Sientra

Headquartered in Santa Barbara, California, Sientra is a diversified global medical aesthetics company and a leading partner to aesthetic physicians. The Company offers a suite of products designed to make a difference in patients' lives by enhancing their body image, growing their self-esteem, and restoring their confidence. Sientra has developed a broad portfolio of products with technologically differentiated characteristics, supported by independent laboratory testing and strong clinical trial outcomes. The Company’s Breast Products Segment includes its OPUS® breast implants, the first fifth generation breast implants approved by the FDA for sale in the United States, its ground-breaking Allox2® breast tissue expander with patented dual-port and integral drain technology, and BIOCORNEUM® the #1 performing, preferred and recommended scar gel of plastic surgeons(*). The Company’s miraDry Segment, comprised of its miraDry® system, is approved for sale in over 56 international markets and is the only non-surgical, FDA-cleared device indicated for the permanent reduction of underarm sweat and hair and may also reduce odor.

Sientra uses its investor relations website to publish important information about the Company, including information that may be deemed material to investors. Financial and other information about Sientra is routinely posted and is accessible on the Company’s investor relations website at www.sientra.com.

^(*) Data on file

Forward-Looking Statements

This press release contains “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, based on management’s current assumptions and expectations of future events and trends, which affect or may affect the Company’s business, strategy, operations or financial performance, and actual results may differ materially from those expressed or implied in such statements due to numerous risks and uncertainties. Forward-looking statements are made only as of the date of this release. The words ‘‘believe,’’ ‘‘may,’’ ‘‘might,’’ ‘‘could,’’ ‘‘will,’’ ‘‘aim,’’ ‘‘estimate,’’ ‘‘continue, ‘‘anticipate,’’ ‘‘intend,’’ ‘‘expect,’’ ‘‘plan,’’ ‘‘position,” or the negative of those terms, and similar expressions that convey uncertainty of future events or outcomes are intended to identify estimates, projections and other forward-looking statements. Forward-looking statements may include information concerning the impact of the COVID-19 pandemic on the Company and its operations, the Company’s possible or assumed future results of operations, including descriptions of the Company’s revenues, profitability, outlook and overall business strategy. Such statements are subject to risks and uncertainties, including the scope and duration of the COVID-19 pandemic, the Company’s ability to recapture delayed procedures resulting from the COVID-19 pandemic, the positive reaction from plastic surgeons and their patients to Sientra’s Breast Products, the ability to meet consumer demand, the growth of the sale of bioTips in its miraDry segment, and the Company’s ability to manage its operating expenses and cash balance. Additional factors that could cause actual results to differ materially from those contemplated in this press release can be found in the Risk Factors section of Sientra’s public filings with the Securities and Exchange Commission. All statements other than statements of historical fact are forward-looking statements. The words ‘‘believe,’’ ‘‘may,’’ ‘‘might,’’ ‘‘could,’’ ‘‘will,’’ ‘‘aim,’’ ‘‘estimate,’’ ‘‘continue, ‘‘anticipate,’’ ‘‘intend,’’ ‘‘expect,’’ ‘‘plan,’’ ‘‘position,” or the negative of those terms, and similar expressions that convey uncertainty of future events or outcomes are intended to identify estimates, projections and other forward-looking statements. You are cautioned not to place undue reliance on these forward-looking

statements, and such estimates, projections and other forward-looking statements speak only as of the date they were made, and, except to the extent required by law, the Company undertakes no obligation to update or review any estimate, projection or forward-looking statement. Actual results may differ from those set forth in this press release due to the risks and uncertainties inherent in the Company’s business.

Contact

Investor Relations

805-679-8885