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SELLAS Life Sciences' Announces Election of Katherine Bach Kalin to its Board of Directors - Ms. Kalin Joins the Board with Decades of Life Sciences and Healthcare Industry Experience

Key Takeaway: SELLAS Life Sciences' Announces Election of Katherine Bach Kalin to its Board of Directors - Ms. Kalin Joins the Board with Decades of and Healthcare Industry Experience - NEW YORK, August 16, 2022 - SELLAS Life Sciences Group, Inc. (NASDAQ: SLS) ("SELLAS'' or the "Company"

Full Press Release Details

SELLAS Life Sciences' Announces Election
of Katherine Bach Kalin
to its Board of Directors
- Ms. Kalin Joins the Board with Decades of
and Healthcare Industry Experience -
NEW YORK, August 16, 2022 - SELLAS Life Sciences Group,
Inc. (NASDAQ: SLS) ("SELLAS'' or the "Company"), a late-stage clinical biopharmaceutical company focused
on the development of novel therapies for a broad range of cancer indications, today announced the election of Katherine Bach Kalin to
its Board of Directors.
"We are delighted to welcome someone with the breadth and depth
of industry experience as Katherine has to join our Board of Directors," stated Jane Wasman, Chair of the Board of SELLAS. "Having
spent her career working in strategy, business development, sales and marketing, and finance within the life sciences and healthcare industries,
Katherine will be a valuable addition to the SELLAS team as the Company continues to evolve and grow," said Ms. Wasman.
Ms. Kalin's healthcare industry experience spans pharmaceuticals,
diagnostics, medical devices and digital health. She currently serves as a non-executive director on the boards of Genfit S.A., a French,
public biopharmaceutical company, where she serves on the Strategy and Alliances Committee, and two private companies, Brown Advisory
LLC, an independent investment and strategic advisory firm, where she sits on the Audit and Finance Committees, and FemHealth Ventures,
a venture capital firm that seeks to invest in women's health. Additionally, she currently serves as a trustee for a not-for-profit organization,
the Summit Foundation, a 501(c)(3) community foundation that fosters local philanthropy.
Previously, Ms. Kalin was a member of the board of directors of Athersys,
a U.S. biotechnology company focused on regenerative medicine from 2020 to 2022, and Clinical Genomics, a private, biotechnology company
dedicated to improving patient outcomes through early detection of colorectal cancer from 2018 to 2021. Ms. Kalin led corporate strategy
at Celgene from 2012 to 2017. Prior to that, from 2002 to 2011, she held executive leadership roles in marketing, sales and new business
development at Johnson & Johnson. From 1990 to 2002, she was a partner in the global healthcare practice at McKinsey & Co. Earlier
in her career, she served as a manager in corporate finance at Nomura International in the U.K. and Japan from 1980 to 1984. She has a
B.A. from Durham University in the U.K. and an M.B.A. from Harvard Business School.
"SELLAS is well-positioned to build on its two promising clinical
programs in oncology. I am intrigued by the promise of both galinpepimut-S (GPS) and GFH009 to hopefully benefit patients in need,"
stated Ms. Kalin. "SELLAS is preparing to become a commercial stage company and I look forward to working alongside my fellow Board
members and the management team at this exciting time for the company."
About SELLAS Life Sciences Group, Inc.
SELLAS Life Sciences
Group, Inc. (NASDAQ: SLS) is a late-stage clinical biopharmaceutical company focused on the development of novel therapeutics for a broad
range of cancer indications. SELLAS' lead product candidate, galinpepimut-S (GPS), is licensed from Memorial Sloan Kettering Cancer
Center and targets the WT1 protein, which is present in an array of tumor types. GPS has potential as a monotherapy or in combination
with other therapies to address a broad spectrum of hematologic malignancies and solid tumor indications. The Company is also developing
GFH009, a small molecule, highly selective CDK9 inhibitor, which is licensed from GenFleet Therapeutics (Shanghai), Inc., for all therapeutic
and diagnostic uses in the world outside of Greater China.
For more information on SELLAS, please visit www.sellaslifesciences.com.
Forward-Looking Statements
This press release contains forward-looking
statements. All statements other than statements of historical facts are "forward-looking statements," including those relating
to future events. In some cases, forward-looking statements can be identified by terminology such as "plan," "expect,"
"anticipate," "may," "might," "will," "should," "project," "believe,"
"estimate," "predict," "potential," "intend," or "continue" and other words
or terms of similar meaning. These statements include, without limitation, statements related to SELLAS' future expectations and
plans for its clinical development programs and prospects for the Company. These forward-looking statements are based on current plans,
objectives, estimates, expectations and intentions, and inherently involve significant risks and uncertainties. Actual results and the
timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties,
which include, without limitation, risks and uncertainties associated with the COVID-19 pandemic and its impact on the Company's
clinical plans and business strategy, risks and uncertainties associated with oncology product development and clinical success thereof,
the uncertainty of regulatory approval, and other risks and uncertainties affecting SELLAS and its development programs as set forth
under the caption "Risk Factors" in SELLAS' Annual Report on Form 10-K filed on March 31, 2022 and in its other SEC
filings. Other risks and uncertainties of which SELLAS is not currently aware may also affect SELLAS' forward-looking statements
and may cause actual results and the timing of events to differ materially from those anticipated. The forward-looking statements herein
are made only as of the date hereof. SELLAS undertakes no obligation to update or supplement any forward-looking statements to reflect
actual results, new information, future events, changes in its expectations or other circumstances that exist after the date as of which
the forward-looking statements were made.
KCSA Strategic Communications
Raquel Cona / Michaela Fawcett
KCSA Strategic Communications
Last updated: Aug 16, 2022