Alector, Inc.

ALEC·NASDAQ·$2.19Share Price as of 11/2·$243MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/06/26 10-QQ1 ended 03/31/2605/07/26 10-KFY 202502/25/26 10-QQ3 ended 09/30/2511/06/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report10/16/26 8-KCurrent report10/14/26 8-KCurrent report10/05/26 8-KCurrent report08/06/26 8-KCurrent report07/08/26

Prospectuses and Registrations

424B5Prospectus supplement10/16/26 FWPFree writing prospectus10/16/26 424B5Prospectus supplement05/07/26 S-3Shelf registration03/12/26 S-8Registration of securities for employees02/25/26

Proxies

DEF 14ADefinitive proxy04/28/26 DEFA14AAdditional proxy materials04/28/26 DEF 14ADefinitive proxy04/24/25 DEFA14AAdditional proxy materials04/24/25 DEF 14ADefinitive proxy04/25/24

Ownership

SC 13GBeneficial ownership10/26/26 SC 13GBeneficial ownership10/23/26 Form 4Insider transaction10/15/26 Form 4Insider transaction10/15/26 Form 4Insider transaction10/15/26

Other

EFFECTRequest for effectiveness04/30/26 ARSAnnual report to shareholders04/28/26 CORRESPCorrespondence with the SEC04/28/26 UPLOADLetter from the SEC03/17/26 ARSAnnual report to shareholders04/25/25