Ostrowski Erik insider trades

Ostrowski Erik has filed 11 Form 4s with the SEC that we hold, for Akebia Therapeutics, Inc. (AKBA) (SVP, CFO, CBO & Treasurer) and Tectonic Therapeutic, Inc. (AVRO) (Interim CEO, President and CFO). Across all of them we count 0 purchases worth $0 and 3 sales worth $262.4K reported on Form 4. In the last 12 months: 0 purchases ($0) and 2 sales ($110.8K). The largest single trade was a sale of 41,314 shares of Akebia Therapeutics, Inc. worth $151.6K, dated 2025-06-30. The first filing on our record is dated 2022-02-04 and the latest 2026-07-01.

Akebia Therapeutics, Inc. (AKBA)

SVP, CFO, CBO & Treasurer · 6 filings · 3 purchases and sales

Trade date	Code	Shares	Value as filed	Filed	Source
2025-06-30	S, sale reported on Form 4	41,314	$151.6K	2025-07-01	SEC
2026-02-02	S, sale reported on Form 4	34,951	$48.6K	2026-02-04	SEC
2026-06-29	S, sale reported on Form 4	56,019	$62.2K	2026-07-01	SEC

Tectonic Therapeutic, Inc. (AVRO)

Interim CEO, President and CFO · 5 filings · 0 purchases and sales

No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.

Source

Counted from the Form 4 filings this reporting owner (SEC CIK 1762507) 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 2026-10-28 · For informational purposes only, not investment advice.
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