Humanigen Inc. Added to Russell 3000(R) Index

Burlingame, California--(Newsfile Corp. - June 28, 2021) - Humanigen, Inc. (NASDAQ: HGEN) ("Humanigen"), a clinical-stage biopharmaceutical company focused on preventing and treating an immune hyper-response called 'cytokine storm', today announced that Humanigen has been added to the Russell 3000® Index at the conclusion of the 2021 Russell indexes annual reconstitution.

The event represents the ongoing accomplishments of Humanigen during a transformational year in developing lenzilumab for the treatment of newly hospitalized patients with COVID-19, and its intentions to continue to develop lenzilumab for the treatment of CAR-T, GvHD, and CMML.

"We are extremely pleased that Humanigen has joined the Russell 3000® Index," said Dr. Cameron Durrant, Chief Executive Officer of Humanigen. "Joining this index is a reflection of the monumental progress we have made in developing our pipeline, strengthening our balance sheet and increasing shareholder value."

Russell indexes are widely used by institutional investors for index funds and as benchmarks for active investment strategies. Approximately $10.6 trillion in assets are benchmarked against Russell's US indexes. Russell indexes are part of FTSE Russell, a leading global index provider. The annual reconstitution of the Russell indexes captures the 4,000 largest US stocks as of May 7, ranking them by total market capitalization. Membership in the US all-cap Russell 3000® Index, which remains in place for one year, means automatic inclusion in the small-cap Russell 2000® Index as well as the appropriate growth and value style indexes.

For more information on the Russell 3000® Index and the Russell indexes reconstitution, go to the "Russell Reconstitution" section on the FTSE Russell website.

About Humanigen

Humanigen, Inc. is developing its portfolio of clinical and pre-clinical therapies for the treatment of inflammation and immuno-oncology. Humanigen's immediate focus is to prevent or minimize cytokine release syndrome that precedes severe lung dysfunction in hospitalized and hypoxic patients with COVID-19 pneumonia. Humanigen is also exploring the effectiveness of lenzilumab in other inflammatory conditions such as acute Graft versus Host Disease (GvHD) in patients undergoing allogeneic hematopoietic stem cell transplantation (HSCT) and cytokine release syndrome associated with CAR-T, bispecific, and other T-cell-engaging therapies, eosinophilic asthma, and rheumatoid arthritis. For more information, visit www.humanigen.com and follow Humanigen on LinkedIn, Twitter, and Facebook.

About FTSE Russell

FTSE Russell is a global index leader that provides innovative benchmarking, analytics and data solutions for investors worldwide. FTSE Russell calculates thousands of indexes that measure and benchmark markets and asset classes in more than 70 countries, covering 98% of the investable market globally. FTSE Russell index expertise and products are used extensively by institutional and retail investors globally. For over 30 years, leading asset owners, asset managers, ETF providers and investment banks have chosen FTSE Russell indexes to benchmark their investment performance and create ETFs, structured products and index-based derivatives. FTSE Russell is wholly owned by London Stock Exchange Group.

Forward-Looking Statements

All statements other than statements of historical facts contained in this press release are forward-looking statements. Forward-looking statements reflect management's current knowledge, assumptions, judgment, and expectations regarding future performance or events. Although management believes that the expectations reflected in such statements are reasonable, they give no assurance that such expectations will prove to be correct, and you should be aware that actual events or results may differ materially from those contained in the forward-looking statements. Words such as "will," "expect," "intend," "plan," "potential," "possible," "goals," "accelerate," "continue," and similar expressions identify forward-looking statements, including, without limitation, statements regarding our plans relating to the development of lenzilumab.

Forward-looking statements are subject to a number of risks and uncertainties including, but not limited to, the risks inherent in our lack of profitability and need for additional capital to grow our business; our dependence on partners to further the development of our product candidates; the uncertainties inherent in the development, attainment of the requisite regulatory authorizations and approvals and launch of any new pharmaceutical product; the outcome of pending or future litigation; and the various risks and uncertainties described in the "Risk Factors" sections of our latest annual and quarterly reports and other filings with the SEC.

All forward-looking statements are expressly qualified in their entirety by this cautionary notice. You should not rely upon any forward-looking statements as predictions of future events. We undertake no obligation to revise or update any forward-looking statements made in this presentation to reflect events or circumstances after the date hereof, to reflect new information or the occurrence of unanticipated events, to update the reasons why actual results could differ materially from those anticipated in the forward-looking statements, in each case, except as required by law.

Humanigen Media

Grace Catlett
RXMD
Gcatlett@rxmedyn.com
516-318-8563

Humanigen Investor Relations

Ken Trbovich
Humanigen
trbo@humanigen.com
650-410-3206

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/88901