Obsidian’s stock is traded on the Nasdaq under the symbol OBX.

Obsidian completed a merger with Galera Therapeutics, Inc. and began regular-way trading on August 4, 2026.

Obsidian’s CUSIP number is 67448A106.

Obsidian is incorporated in Delaware.

Obsidian is headquartered at 1 Patriots Park, Bedford, MA 01730.

Equiniti is the current transfer agent. We anticipate transition to Computershare mid-month.

Computershare Trust Company, N.A.
150 Royall Street, Suite 101. 
Canton, MA 02021.
www.computershare.com

Shares may be purchased through a financial services provider of your choice. Obsidian does not have a direct stock purchase plan.

You must contact our transfer agent. They can look up your records and make any necessary adjustments. There is a fee involved for replacing lost certificates.

KPMG LLP,
Two Financial Center, 
60 South St,
Boston, MA 02111
(617)-988-1000

Obsidian’s fiscal year ends on December 31st.

You can get them on our website or you can send a request by email to ir@obsidiantx.com.

Obsidian was founded in 2015.

Goodwin Procter LLP,
100 Northern Avenue
Boston, MA 02210
(617) 570-1000

Obsidian’s press release archives can be viewed here.

Obsidian’s SEC filings can be viewed here. Additionally, all SEC filings can be accessed directly from the SEC at www.sec.gov.

You can submit queries to Obsidian’s investor relations department by contacting ir@obsidiantx.com.