EX-99.1

Alector Reports Third Quarter 2022 Financial Results and Provides Business Update

Progressing enrollment in the INFRONT-3 Phase 3 pivotal study for latozinemab (AL001) and in the INVOKE-2 Phase 2 study for AL002

Initiated first-in-human Phase 1 trial of AL044, the company’s third novel, first-in-class clinical stage microglia immune checkpoint therapy for the treatment of Alzheimer’s disease (AD)

$758.3 million in cash, cash equivalents and investments provide runway through 2024

South San Francisco, Calif., November 8, 2022 -- Alector, Inc. (Nasdaq: ALEC), a clinical-stage biotechnology company pioneering immuno-neurology and innate immuno-oncology, today reported third quarter 2022 financial results and recent portfolio and business updates. As of September 30, 2022, Alector’s cash, cash equivalents and investments totaled $758.3 million.

“In the third quarter, we expanded our first-in-class clinical immuno-neurology pipeline with AL044, a biologic targeting MS4A, a brain immune checkpoint molecule and a genetic risk factor for Alzheimer’s disease. We also continued to advance our INFRONT-3 Phase 3 pivotal study of latozinemab for frontotemporal dementia with progranulin mutations, or FTD-GRN, and our INVOKE-2 Phase 2 Alzheimer’s disease study with AL002, which activates TREM2 receptor signaling,” said Arnon Rosenthal, Ph.D., Chief Executive Officer of Alector. “We will be reporting new data from the Phase 1 study of AL101 later this year at CTAD in addition to follow-up data from the INFRONT-2 Phase 2 trial in patients with symptomatic FTD-C9orf72 in 2023.”

“We anticipate biomarker data from the AL044 healthy volunteer study and completion of enrollment in our INVOKE-2 study in 2023. We believe that our immuno-neurology drug candidates, which are designed to regulate key aspects of microglial proliferation, survival, migration, lysosomal function and immune response, could prove important in effectively treating neurodegeneration either as stand-alone therapies or potentially in combination with anti-beta amyloid drugs.”

Sara Kenkare-Mitra, Ph.D., President and Head of Research and Development at Alector, added, “Our immuno-oncology pipeline continues to advance as well. We remain on track to submit an IND for AL009, Alector’s first-in-class multi-Siglec inhibitor, by the end of the year.”

“We are also thrilled to have expanded our talented leadership team over the past quarter as we welcomed Peter Heutink, Ph.D., as Chief Scientific Officer,” said Dr. Kenkare-Mitra. “Peter’s expertise in the human genetics of neurodegenerative disease is important to our efforts at Alector.”

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Enrollment is ongoing globally in the INFRONT-3 randomized, placebo-controlled, pivotal Phase 3 trial evaluating the efficacy and safety of latozinemab (AL001) in at-risk and symptomatic patients with FTD-GRN. The first patient has been enrolled in the open-label extension study.

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The company expects to report follow-up data from the INFRONT-2 Phase 2 clinical trial of latozinemab in frontotemporal dementia patients with a C9orf72 genetic mutation (FTD-C9orf72) in 2023.

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Alector will present a poster, Repeat IV and SC dosing of the Anti-Sortilin Antibody AL101, with data from the Phase 1 trial of AL101 in healthy volunteers at the 15th Clinical Trials on Alzheimer’s Disease (CTAD) conference, being held in San Francisco, California from November 29 to December 2, 2022. AL101 is intended to elevate progranulin levels in a manner similar to latozinemab, and the company plans to investigate AL101 for the treatment of Alzheimer’s disease (AD) and Parkinson’s disease (PD).

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Enrollment in the INVOKE-2 Phase 2 study of AL002 continues. The INVOKE-2 Phase 2 clinical trial is designed to evaluate the efficacy and safety of AL002 in slowing disease progression in individuals with early AD. AL002 is being developed in collaboration with AbbVie and targets Triggering Receptor Expressed on Myeloid cells 2 (TREM2) to increase TREM2 signaling and the functionality of microglia, which are brain-specific immune cells.

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The company commenced its first-in-human Phase 1 trial of AL044, the first clinical-stage drug candidate to target MS4A, a major genetic risk factor for AD and an immune checkpoint expressed on microglia. The study, initiated in September of this year, is investigating the safety profile, pharmacokinetics (PK), pharmacodynamics (PD) and target engagement of AL044 in healthy adults. Safety and biomarker data from this study are anticipated in 2023. The company views MS4A as a master inhibitory checkpoint for the brain’s immune system and believes its inhibition will activate microglia in a disease-selective manner to broadly counteract Alzheimer’s disease and potentially orphan neurodegenerative indications.

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Alector anticipates submitting an IND for its AL009 innate immuno-oncology program before the end of the year. The company will present a poster, Characterization of suppressive myeloid cells in solid tumors to refine disease selection in a Phase 1 study of the multi-Siglec inhibitor AL009, at the Society for Immunotherapy of Cancer (SITC) 37th Annual Meeting being held in Boston, Massachusetts and virtually from November 8 to 12, 2022. AL009 is a dual function biologic that inhibits multiple Siglec receptors on myeloid cells and simultaneously activates a stimulating receptor on the same cells. The company plans to prioritize tumor types that have immunosuppressive phenotypes and expects to study AL009 as a monotherapy and in combination with standard of care.

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The company plans to utilize data and documentation from a regulatory filing previously submitted by Innovent to Chinese authorities for AL008 to support a potential IND submission in the U.S. AL008 is a novel innate immuno-oncology candidate with a dual mechanism of action, targeting SIRP-alpha (SIRPa) to inhibit the CD47- SIRPα pathway and activating Fc receptors to promote immuno-stimulatory pathways that drive anti-tumor immunity.

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Peter Heutink, Ph.D., began his role as Alector’s Chief Scientific Officer in October. Leveraging nearly 30 years of experience in the neurodegenerative disease space, Dr. Heutink provides scientific oversight of the company’s significant research pipeline and helps drive business strategy.

Revenue. Collaboration revenue for the quarter ended September 30, 2022, was $14.9 million, compared to $182.4 million for the same period in 2021. The decrease of $167.6 million was due to $173.4 million collaboration revenue recognized from AL001 FTD-GRN license provided as part of the GSK Agreement in 2021.

R&D Expenses. Total research and development expenses for the quarter ended September 30, 2022, were $48.3 million, compared to $43.1 million for the quarter ended September 30, 2021. The increase in R&D expenses was mainly driven by increased personnel-related expenses as well as an increase in AL002 expenses.

G&A Expenses. Total general and administrative expenses for the quarter ended September 30, 2022, were $14.3 million, compared to $13.0 million for the same period in 2021. The increase is primarily due to personnel-related expenses.

Net Income (Loss). For the quarter ended September 30, 2022, Alector reported net loss of $46.1 million, or $0.56 net loss per share, compared to a net income of $126.6 million, or $1.56 net income per share, for the same period in 2021.

Cash Position. Cash, cash equivalents, and investments were $758.3 million as of September 30, 2022. Management anticipates that this will be sufficient to fund current operations through 2024.

Alector is a clinical-stage biotechnology company pioneering immuno-neurology, a novel therapeutic approach for the treatment of neurodegenerative diseases, and innate immuno-oncology. Immuno-neurology targets immune dysfunction as a root cause of multiple pathologies that are drivers of degenerative brain disorders. Alector has discovered and is developing a broad portfolio of innate immune system programs, designed to functionally repair genetic mutations that cause dysfunction of the brain’s immune system and enable rejuvenated immune cells to counteract emerging brain pathologies. Alector’s immuno-neurology product candidates are supported by biomarkers and target genetically defined patient populations in frontotemporal dementia and Alzheimer’s disease. This scientific approach is also the basis for the company’s innate immuno-oncology programs. Alector is headquartered in South San Francisco, California. For additional information, please visit www.alector.com.

Forward-Looking Statements
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements in this press release include, but are not limited to, statements regarding our business plans, business strategy, product candidates, planned preclinical studies, clinical trials, expected milestones, expectations of our collaborations, and financial and cash guidance. Such statements are subject to numerous risks and uncertainties, including but not limited to risks and uncertainties as set forth in Alector’s Quarterly Report on Form 10-Q, as filed on November 8, 2022, with the Securities and Exchange Commission (“SEC”), as well as the other documents Alector files from time to time with the SEC. These documents contain and identify important factors that could cause the actual results for Alector to differ materially from those contained in Alector’s forward-looking statements. Any forward-looking statements contained in this press release speak only as of the date hereof, and Alector specifically disclaims any obligation to update any forward-looking statement, except as required by law.

Argot Partners (investors)
Laura Perry/Carrie McKim
Argot Partners
212.600.1902
alector@argotpartners.com


	September 30,		December 31,
	2022		2021

Cash, cash equivalents, and marketable securities	$	758,306	$	735,251
Total assets		837,038		814,658
Total current liabilities (excluding deferred revenue)		41,205		48,752
Deferred revenue (including current portion)		506,041		425,218
Total liabilities		583,934		513,934
Total stockholders’ equity		253,104		300,724


	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022			2021
Collaboration revenue	$	14,852	$	182,413	$	119,177		$	193,091
Operating expense:
Research and development		48,348		43,066		155,925			136,617
General and administrative		14,252		13,018		45,648			38,015
Total operating expenses		62,600		56,084		201,573			174,722
Income (loss) from operations		(47,748)		126,329		(82,396	)		18,369
Other income, net		2,333		268		4,047			910
Net income (loss) before income tax		(45,415)		126,597		(78,349	)		19,279
Income tax expense		733		—		2,533			—
Net income (loss)	$	(46,148)	$	126,597	$	(80,882	)	$	19,279
Net income (loss) per share:
Basic net income (loss) per share	$	(0.56)	$	1.56	$	(0.98	)	$	0.24
Diluted net income (loss) per share	$	(0.56)	$	1.49	$	(0.98	)	$	0.23
Weighted-average shares used in calculating:
Basic net income (loss) per share		82,602,842		80,964,701		82,367,936			80,048,758
Diluted net income (loss) per share		82,602,842		85,232,690		82,367,936			82,871,254