SCHEDULE: Polaris Venture Partners Adjusts Alector Stake

Polaris Venture Partners entities and associated individuals have updated their beneficial ownership filings for Alector, Inc., reflecting holdings as of April 30, 2026.

Summary

• This filing is an amendment to a Schedule 13G, indicating a change in beneficial ownership of Alector, Inc. common stock by various Polaris Venture Partners entities and individuals.
• The reporting date for the ownership information is April 30, 2026.
• The filing details the number of shares and percentage of class beneficially owned by Polaris Venture Partners VI, L.P., Polaris Venture Partners Founders' Fund VI, L.P., Polaris Venture Partners VI (AIV), L.P., Polaris Venture Partners VI (AIV-B), L.P., Polaris Venture Management Co VI, L.L.C., David Barrett, Brian Chee, Jonathan A. Flint, Terrance G. McGuire, Amir Nashat, and Bryce Youngren.
• The total beneficial ownership reported by Polaris Venture Management Co VI, L.L.C. and the individual managing members is 4,853,817 shares, representing 4.4% of the class, based on 110,362,581 shares outstanding as of February 20, 2026.
• Terrance G. McGuire also reports direct holdings and restricted stock units, bringing his total beneficial ownership to 5,173,499 shares, or 4.7% of the class.
• Jonathan A. Flint reports direct holdings and shared voting/dispositive power, totaling 4,892,941 shares (4.4%).
• Amir Nashat reports direct holdings and shared voting/dispositive power, totaling 4,985,149 shares (4.5%).
• Bryce Youngren reports direct holdings and shared voting/dispositive power, totaling 4,865,681 shares (4.4%).
• Each reporting person disclaims beneficial ownership except to the extent of their pecuniary interest.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral filing, as it is a routine disclosure of beneficial ownership changes by institutional investors and does not provide performance data or strategic insights into the company's operations.

Positives

• The filing provides updated transparency on significant beneficial ownership stakes in Alector, Inc.
• The reporting entities are established venture capital firms and experienced individuals in the biotech/pharma sector, suggesting strategic investment.

Negatives

• The filing does not contain financial performance data or operational updates for Alector, Inc., making it difficult to assess the company's health.
• The nature of the filing (Schedule 13G amendment) primarily concerns ownership changes, not necessarily positive or negative company performance.

Risks

• The filing does not explicitly mention any risks or challenges faced by Alector, Inc. or the reporting persons.

Future Outlook

This filing is an amendment to a Schedule 13G and does not contain forward-looking statements or guidance regarding Alector, Inc.'s future performance.

Management Comments

• Each of the Reporting Persons disclaims beneficial ownership of the shares of Common Stock reported in this Amendment No. 7, except for the shares, if any, such Reporting Person holds of record and to the extent of such Reporting Person's pecuniary interest therein.

Industry Context

StockSavvy.ai notes that Schedule 13G filings are common for institutional investors like venture capital firms to report significant stakes in public companies. The updated filing by Polaris Venture Partners indicates ongoing management and potential strategic interest in Alector, Inc., a biotechnology company.

Stakeholder Impact

• Shareholders: The filing provides transparency on the holdings of a significant venture capital firm, which can influence market perception. However, without performance data, the direct impact on share price is uncertain.
• Management: The filing confirms the ongoing interest and potential influence of Polaris Venture Partners and its key personnel in Alector, Inc.

Next Steps

• Continued monitoring of subsequent Schedule 13G filings by Polaris Venture Partners and other institutional investors for further changes in beneficial ownership.
• Review of Alector, Inc.'s operational and financial reports for insights into the company's performance and strategic direction.

Key Dates

Keywords

Alector, Inc., Schedule 13G, Beneficial Ownership, Polaris Venture Partners, Venture Capital, Stock Holdings, SEC Filing, Amendment