Investor Aquilo Capital Management, LLC
13D/G Filings

This page shows a list of all the recent 13D/G filings made by Aquilo Capital Management, LLC . Schedule 13D is commonly referred to as a “beneficial ownership report.” The term "beneficial owner" is defined under SEC rules. It includes any person who directly or indirectly shares voting power or investment power (the power to sell the security).

When a person or group of persons acquires beneficial ownership of more than 5% of a voting class of a company’s equity securities, they are required to file a Schedule 13D within ten days after the purchase. Click the link icon to see the full transaction history.

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Date Form Target Prev
Shares		 Current
Shares		 Change
(Percent)		 Ownership
(Percent)		 Change
(Percent)
2025-08-06 13G/A DTIL / Precision BioSciences, Inc. 791,862 0
2025-02-14 13G/A DTIL / Precision BioSciences, Inc. 662,659 791,862
2024-03-18 13G DTIL / Precision BioSciences, Inc. 662,659
2024-02-14 13G/A PIRS / Pieris Pharmaceuticals, Inc. 5,679,637 1,126,761
2023-02-14 13G/A PIRS / Pieris Pharmaceuticals, Inc. 4,323,288 5,679,637
2023-02-14 13G/A SPRO / Spero Therapeutics, Inc. 3,419,435 0
2023-02-14 13G/A MGTA / Magenta Therapeutics Inc 3,155,082 0
2022-10-03 13G/A SPRO / Spero Therapeutics, Inc. 5,021,536 3,419,435
2022-03-09 13G/A SPRO / Spero Therapeutics, Inc. 4,964,181 5,021,536
2022-02-14 13G/A SPRO / Spero Therapeutics, Inc. 3,932,209 4,964,181
2022-02-14 13G/A PIRS / Pieris Pharmaceuticals, Inc. 4,802,291 4,323,288
2022-02-14 13G MGTA / Magenta Therapeutics Inc 3,155,082
2021-02-16 13G/A PIRS / Pieris Pharmaceuticals, Inc. 5,575,530 4,802,291
2021-02-16 13G/A SPRO / Spero Therapeutics, Inc. 4,497,142 3,932,209
2020-09-23 13G/A SPRO / Spero Therapeutics, Inc. 4,497,142 4,497,142
2020-09-22 13G/A SPRO / Spero Therapeutics, Inc. 1,154,356 4,497,142
2020-04-22 13G/A PIRS / Pieris Pharmaceuticals, Inc. 5,575,530 5,575,530
2020-04-21 13G/A PIRS / Pieris Pharmaceuticals, Inc. 5,550,365 5,575,530
2020-02-14 13G/A PIRS / Pieris Pharmaceuticals, Inc. 2,900,436 5,550,365
2020-02-14 13G/A SPRO / Spero Therapeutics, Inc. 1,154,356
2020-02-14 13G/A MRUS / Merus N.V. 1,480,855 1,038,746
2020-02-14 13G/A SYBX / Synlogic, Inc. 1,334,179 0
2019-10-07 13G PIRS / Pieris Pharmaceuticals, Inc. 2,900,436
2019-02-14 13G/A SPRO / Spero Therapeutics, Inc. 1,031,947
2019-02-14 13G SYBX / Synlogic, Inc. 1,334,179
2019-02-14 13G/A MRUS / Merus N.V. 1,451,650 1,480,855
2019-01-03 13G MRUS / Merus N.V. 1,451,650