Filing Details

Accession Number:
0001591986-22-000018
Form Type:
4
Zero Holdings:
No
Publication Time:
2022-09-26 15:32:06
Reporting Period:
2022-09-22
Accepted Time:
2022-09-26 15:32:06
SEC Url:
Form 4 Filing
Issuer
Cik Name Symbol Sector (SIC) IRS No
1701108 Spero Therapeutics Inc. SPRO () DE
Insiders
Cik Name Reported Address Insider Title Director Officer Large Shareholder Other
1491371 Aquilo Capital, L.p. One Letterman Drive, Suite D4900
Building D, The Presidio
San Francisco CA 94129
No No Yes No
1591986 Aquilo Capital Management, Llc One Letterman Drive
Suite D4900, Building D
San Francisco CA 94129
No No Yes No
Reported Non-Derivative Transactions
Sec. Name Acquisiton - Disposition Date Amount Price Remaning Holdings Equity Swap Involved Form Type Code Nature of Ownership Explanation
Common Stock, $0.001 Par Value Disposition 2022-09-22 1,335,512 $2.25 3,985,719 No 4 S Indirect See Footnotes
Common Stock, $0.001 Par Value Disposition 2022-09-22 566,284 $2.25 3,419,435 No 4 S Indirect See Footnotes
Equity Swap Involved Form Type Code Nature of Ownership Explanation
No 4 S Indirect See Footnotes
No 4 S Indirect See Footnotes
Footnotes
  1. The reporting persons are Aquilo Capital, L.P. (the "Fund"), Aquilo Capital Management, LLC ("Aquilo") and Marc R. Schneidman. Aquilo is the general partner and investment adviser of the Fund and other funds managed by Aquilo that hold securities directly for the benefit of their investors. Aquilo may be deemed to beneficially own such securities indirectly as the investment adviser and general partner of the Fund and affiliated funds, and Mr. Schneidman may be deemed to beneficially own them indirectly as the control person of Aquilo. Each of, Aquilo, the Fund and Mr. Schneidman disclaims beneficial ownership of such securities except to the extent of his or its pecuniary interest therein.
  2. Aquilo Capital, LP owns 2,176,470 of the 3,985,719 shares deemed to be beneficially owned by Aquilo Capital Management, LLC. Aquilo Capital, LP sold 1,335,512 shares in this transaction on 09/22/2022.
  3. Aquilo Capital, LP owns only 2,176,470 of the 3,419,435 shares deemed to be beneficially owned by Aquilo Capital Management, LLC. Aquilo Capital, LP did not sell any of the 566,284 shares sold in this transaction on 09/22/2022.