# EDGAR Filing Document

**Accession Number:** 0001653087
**File Stem:** 0001193125-26-188158
**Filing Date:** 2026-4
**Character Count:** 2442
**Document Hash:** f6dc3f2359cdf40c40ee9fb1191c1a75
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-188158.hdr.sgml**: 20260529

**ACCESSION NUMBER**: 0001193125-26-188158

**CONFORMED SUBMISSION TYPE**: CORRESP

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260428

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Alector, Inc.
- **CENTRAL INDEX KEY:** 0001653087
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 822933343
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** CORRESP

**BUSINESS ADDRESS:**
- **STREET 1:** 131 OYSTER POINT BLVD., SUITE 600
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94080
- **BUSINESS PHONE:** 415-231-5660

**MAIL ADDRESS:**
- **STREET 1:** 131 OYSTER POINT BLVD., SUITE 600
- **CITY:** SOUTH SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94080

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Alector LLC
- **DATE OF NAME CHANGE:** 20150915

April 28, 2026

**<u>VIA EDGAR</u>**

U.S. Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E.

Washington, D.C. 20549

Attn: Daniel Crawford

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| | |
|:---|:---|
| **Re:** | **Alector, Inc.**  |

---

**Registration Statement on Form S-3** 

**Filed March 12, 2026** 

**File No. 333-294241** 

**Acceleration Request** 

**Requested Date: April 30, 2026** 

**Requested Time: 4:05 p.m. Eastern Time, or as soon as thereafter practicable** 

Ladies and Gentlemen:

Pursuant to Rule 461 under the Securities Act of 1933, as amended, Alector, Inc. (the "Company") hereby requests that the above-referenced Registration Statement on Form S-3 (File No. 333-294241) (the "Registration Statement") be declared effective at the "Requested Date" and "Requested Time" set forth above, or as soon thereafter as practicable, or at such later time as the Company or its counsel may orally request via telephone call to the staff of the Division of Corporation Finance of the Securities and Exchange Commission. Once the Registration Statement has been declared effective, please orally confirm that event with the Company's counsel, Wilson Sonsini Goodrich & Rosati, P.C., by calling Michael Coke at 650-565-3596.

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| |
|:---|
| Sincerely, |
| **Alector, Inc.** |
| /s/ Arnon Rosenthal |
| Arnon Rosenthal, Ph.D. |
| *Chief Executive Officer* |

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cc: Danielle Pasqualone, Alector, Inc.

Michael Coke, Wilson Sonsini Goodrich & Rosati, P.C.