Merger and Related Transactions	6 Months Ended
Jun. 30, 2023
Business Combinations [Abstract]
Merger and Related Transactions	3. Merger and Related Transactions As described in Note 1 - Nature of Business, Private CalciMedica merged with a wholly owned subsidiary of Graybug on March 20, 2023. The Merger was accounted for as a reverse recapitalization under U.S. GAAP. Private CalciMedica was considered the accounting acquirer for financial reporting purposes. This determination is based on the facts that, immediately following the Merger: (i) former Private CalciMedica stockholders owned a substantial majority of the voting rights of the combined company; Private CalciMedica designated a majority (five of seven) of the initial members of the board of directors of the combined company; and former Private CalciMedica's senior management held all key positions in senior management of the combined company. The transaction is accounted for as a reverse recapitalization of Graybug by Private CalciMedica similar to the issuance of equity for the net assets of Graybug, which are primarily cash, short-term investments and other non-operating assets. It was concluded that any in-process research and development assets that remained as of the Merger would be de minimis when compared to the cash and investments obtained through the Merger. Under reverse recapitalization accounting, the assets and liabilities of Graybug were recorded at their fair value, which approximated book value due to the short-term nature of the instruments. The Company's condensed consolidated financial statements reflect the issuance of 1,571,433 shares to the former stockholders of Graybug. Under the terms of the Merger Agreement, immediately prior to the effective time of the Merger, each outstanding share of Private CalciMedica capital stock (after giving effect to the automatic conversion of all shares of Private CalciMedica preferred stock into shares of Private CalciMedica common stock, the automatic exercise of certain Private CalciMedica warrants to purchase shares of Private CalciMedica common stock in accordance with their terms (the “Private CalciMedica warrant exercises”), the conversion of Private CalciMedica convertible promissory notes into Private CalciMedica common stock and the closing of the private placement (as discussed in Note 6 - Convertible Preferred Stock, Common Stock, and Stockholders' Deficit)), was converted into the right to receive 0.0288 shares of Graybug common stock, which resulted in the issuance by Graybug of an aggregate of 3,946,540 shares of Graybug common stock to the stockholders of Private CalciMedica in a transaction exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), in reliance on Section 4(a)(2) of the Securities Act and the rules promulgated thereunder. In addition, Graybug assumed the Private CalciMedica 2006 Stock Plan (See Note 7 - Stock-Based Compensation), and each outstanding and unexercised option to purchase Private CalciMedica common stock and each outstanding and unexercised warrant to purchase Private CalciMedica common stock (excluding the warrants which were automatically exercised pursuant to the Private CalciMedica warrant exercises) became options and warrants, respectively, to purchase shares of Graybug common stock. Immediately following the consummation of the Merger prior Private CalciMedica and Graybug stockholders collectively own approximately 72% and 28% of the Company, respectively, on a fully diluted basis. As part of the reverse recapitalization, Private CalciMedica received $29.4 million of cash, cash equivalents and short-term investments, net of transaction costs. Private CalciMedica also obtained prepaid and other current assets of approximately $2.1 million and assumed payables and accrued expenses of approximately $2.3 million. Private CalciMedica also incurred transaction costs of approximately $4.6 million, which is recorded as a reduction to additional paid-in capital in the accompanying condensed consolidated statement of convertible preferred stock and stockholders' equity (deficit). The Company also recorded one-time charges of $10.5 million for the acceleration of the Graybug stock awards and $5.7 million in severance charges that are recorded in the condensed consolidated statements of operations and comprehensive loss for the six months ended June 30, 2023. On March 17, 2023, in connection with the transactions contemplated by the Merger Agreement and following a special meeting of Graybug’s stockholders, Graybug filed an Amended and Restated Certificate of Incorporation effecting a reverse stock split of Graybug’s common stock, par value $0.0001 per share, at a ratio of 14:1 (“Reverse Stock Split”).

Merger and Related Transactions

6 Months Ended

Jun. 30, 2023

3. Merger and Related Transactions

As described in Note 1 - Nature of Business, Private CalciMedica merged with a wholly owned subsidiary of Graybug on March 20, 2023. The Merger was accounted for as a reverse recapitalization under U.S. GAAP. Private CalciMedica was considered the accounting acquirer for financial reporting purposes. This determination is based on the facts that, immediately following the Merger: (i) former Private CalciMedica stockholders owned a substantial majority of the voting rights of the combined company; Private CalciMedica designated a majority (five of seven) of the initial members of the board of directors of the combined company; and former Private CalciMedica's senior management held all key positions in senior management of the combined company. The transaction is accounted for as a reverse recapitalization of Graybug by Private CalciMedica similar to the issuance of equity for the net assets of Graybug, which are primarily cash, short-term investments and other non-operating assets. It was concluded that any in-process research and development assets that remained as of the Merger would be de minimis when compared to the cash and investments obtained through the Merger.

Under reverse recapitalization accounting, the assets and liabilities of Graybug were recorded at their fair value, which approximated book value due to the short-term nature of the instruments. The Company's condensed consolidated financial statements reflect the issuance of 1,571,433 shares to the former stockholders of Graybug.

Under the terms of the Merger Agreement, immediately prior to the effective time of the Merger, each outstanding share of Private CalciMedica capital stock (after giving effect to the automatic conversion of all shares of Private CalciMedica preferred stock into shares of Private CalciMedica common stock, the automatic exercise of certain Private CalciMedica warrants to purchase shares of Private CalciMedica common stock in accordance with their terms (the “Private CalciMedica warrant exercises”), the conversion of Private CalciMedica convertible promissory notes into Private CalciMedica common stock and the closing of the private placement (as discussed in Note 6 - Convertible Preferred Stock, Common Stock, and Stockholders' Deficit)), was converted into the right to receive 0.0288 shares of Graybug common stock, which resulted in the issuance by Graybug of an aggregate of 3,946,540 shares of Graybug common stock to the stockholders of Private CalciMedica in a transaction exempt from registration under the Securities Act of 1933, as amended (the “Securities Act”), in reliance on Section 4(a)(2) of the Securities Act and the rules promulgated thereunder. In addition, Graybug assumed the Private CalciMedica 2006 Stock Plan (See Note 7 - Stock-Based Compensation), and each outstanding and unexercised option to purchase Private CalciMedica common stock and each outstanding and unexercised warrant to purchase Private CalciMedica common stock (excluding the warrants which were automatically exercised pursuant to the Private CalciMedica warrant exercises) became options and warrants, respectively, to purchase shares of

Graybug common stock. Immediately following the consummation of the Merger prior Private CalciMedica and Graybug stockholders collectively own approximately 72% and 28% of the Company, respectively, on a fully diluted basis.

As part of the reverse recapitalization, Private CalciMedica received $29.4 million of cash, cash equivalents and short-term investments, net of transaction costs. Private CalciMedica also obtained prepaid and other current assets of approximately $2.1 million and assumed payables and accrued expenses of approximately $2.3 million. Private CalciMedica also incurred transaction costs of approximately $4.6 million, which is recorded as a reduction to additional paid-in capital in the accompanying condensed consolidated statement of convertible preferred stock and stockholders' equity (deficit). The Company also recorded one-time charges of $10.5 million for the acceleration of the Graybug stock awards and $5.7 million in severance charges that are recorded in the condensed consolidated statements of operations and comprehensive loss for the six months ended June 30, 2023.

On March 17, 2023, in connection with the transactions contemplated by the Merger Agreement and following a special meeting of Graybug’s stockholders, Graybug filed an Amended and Restated Certificate of Incorporation effecting a reverse stock split of Graybug’s common stock, par value $0.0001 per share, at a ratio of 14:1 (“Reverse Stock Split”).