WaveMan · Form 4
Aquilo Capital Management, LLC insider trades
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Aquilo Capital Management, LLC insider trades

Aquilo Capital Management, LLC has filed 9 Form 4s with the SEC that we hold, all for Spero Therapeutics, Inc. (SPRO), as 10% owner. Across all of them we count 12 purchases worth $8.8M and 2 sales worth $4.3M reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a sale of 1,335,512 shares of Spero Therapeutics, Inc. worth $3.0M, dated 2022-09-22. The first filing on our record is dated 2021-09-01 and the latest 2022-09-26.

Spero Therapeutics, Inc. (SPRO)

10% owner · 9 filings · 14 purchases and sales
Trade dateCodeSharesValue as filedFiled
2021-08-30P, purchase reported on Form 444,042$787.0K2021-09-01
2021-08-31P, purchase reported on Form 448,645$920.8K2021-09-01
2021-09-09P, purchase reported on Form 424,749$457.9K2021-09-10
2021-12-29P, purchase reported on Form 475,493$1.1M2022-01-03
2021-12-30P, purchase reported on Form 450,000$788.5K2022-01-03
2021-12-31P, purchase reported on Form 4125,000$2.0M2022-01-03
2022-01-10P, purchase reported on Form 48,867$114.7K2022-01-12
2022-01-18P, purchase reported on Form 448,488$601.7K2022-01-20
2022-01-31P, purchase reported on Form 4125,000$1.4M2022-02-01
2022-02-18P, purchase reported on Form 414,828$137.0K2022-02-23
2022-03-30P, purchase reported on Form 416,885$148.4K2022-03-31
2022-03-30P, purchase reported on Form 433,115$291.1K2022-03-31
2022-09-22S, sale reported on Form 4566,284$1.3M2022-09-26
2022-09-22S, sale reported on Form 41,335,512$3.0M2022-09-26
Source

Counted from the Form 4 filings this reporting owner (SEC CIK 1591986) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.

Source: U.S. Securities and Exchange Commission (EDGAR) and other official government data · Updated 2026-10-12 · For informational purposes only, not investment advice.
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