Alector, Inc. (ALEC) stock

ALECNasdaqBiological Products, (No Diagnostic Substances)Fiscal year ends December 31

Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 5, 2026Score 12/3069% below fair value

$2.54+0.09 (+3.67%)

Close on Nov 13, 2026Market cap $283.61MP/E 7.3Yield –

Alector statistics

88 measures from SEC filings and the closing price. Hover a name for the formula; the last column is the median of companies in the same industry group.

Important dates

Next earnings: Feb 24, 2027 (estimated, after the close)
Last ex-dividend date: No dividends
Fundamentals through: Sep 30, 2026
Share price as of: Nov 13, 2026

Valuation ratiosIndustry

Market Cap: $283.61M; $272.32M
Enterprise Value: $144.91M; $146.23M
PE Ratio: 7.26; 25.11
PS Ratio: 1.63; 3.66
PB Ratio: 2.43; 2.00
P/TBV Ratio: 2.43; 2.22

Enterprise valuationIndustry

EV / Sales: 0.84; 2.57
EV / EBITDA: 3.69; 16.50
EV / EBIT: 4.14; 19.31

Share statisticsIndustry

Shares Outstanding: 112M; 58M
Shares Change (YoY): 10.8%; 10.8%
Shares Change (QoQ): 0.55%; 0.50%
Float: 101M; 49M
Shares Held by Insiders: 9.60%; 11.7%
Shares Held by Institutions: 85.8%; 56.4%

Short sellingIndustry

Short Interest: 8M; –
Short Interest Change: -18.1%; -0.80%
Short % of Float: 8.32%; 9.01%
Short % of Shares Outstanding: 7.52%; 6.30%
Days to Cover: 3.62; 5.15

Stock price statisticsIndustry

52-Week High: $2.84; –
52-Week Low: $1.09; –
20-Day Moving Average: $2.18; –
50-Day Moving Average: $2.07; –
200-Day Moving Average: $2.05; –
Average True Range (14): $0.23; –
Price Change (1 Week): 10.9%; -1.15%
Price Change (1 Month): 33.0%; -4.87%
Price Change (3 Months): 23.9%; -21.0%
Price Change (6 Months): 17.6%; -20.6%
Price Change (YTD): 62.8%; -23.6%
Price Change (1 Year): 89.6%; -22.4%
Price Change (3 Years): -40.9%; -29.5%
Price Change (5 Years): -89.0%; -77.9%
Average Volume (10 Days): 2M; –
Average Volume (20 Days): 2M; –
Average Volume (90 Days): 3M; –
Relative Volume: 0.68; 0.70
Relative Strength Index (14): 62.0; 43.4
Volatility (1 Year): 84.4%; 80.1%
Beta (5 Years): 1.50; 1.07

MarginsIndustry

Operating Margin: 20.2%; -38.7%
Pretax Margin: 24.1%; -11.6%
Profit Margin: 23.9%; -31.6%
EBITDA Margin: 22.6%; -27.7%
FCF Margin: -86.5%; -9.56%

Returns on capitalIndustry

Return on Equity (ROE): 47.5%; -49.9%
Return on Assets (ROA): 16.5%; -40.6%
Return on Capital Employed (ROCE): 26.8%; -37.9%

Financial positionIndustry

Current Ratio: 4.10; 3.30
Quick Ratio: 3.92; 2.39
Debt / Equity: 0.00; 0.49
Debt / EBITDA: 0.00; 3.15
Net Debt / EBITDA: -3.53; 1.97

GrowthIndustry

Revenue Growth (YoY): 151.2%; 6.82%
Revenue Growth (3Y CAGR): -46.0%; 2.25%
Revenue Growth (5Y CAGR): -0.05%; 6.41%

EfficiencyIndustry

Asset Turnover: 0.69; 0.40
Revenue Per Employee: $1.68M; $429.29K
Profits Per Employee: $402.07K; -$689.41K
Employee Count: 103; 74
WACC: 12.6%; 10.2%

Income statement (TTM)Industry

Revenue: $173.47M; $66.37M
Operating Income: $34.96M; -$21.37M
Pretax Income: $41.77M; -$12.95M
Net Income: $41.41M; -$22.35M
EBITDA: $39.24M; -$17.21M
EPS (Diluted): $0.35; -$0.76

Balance sheetIndustry

Cash & Short-Term Investments: $138.70M; $68.68M
Total Debt: $0; $116.91M
Net Cash (Debt): $138.70M; $17.76M
Net Cash Per Share: $1.24; $0.80
Equity (Book Value): $116.57M; $53.89M
Book Value Per Share: $1.04; $1.50
Tangible Book Value: $116.57M; $27.13M
Working Capital: $109.93M; $79.99M

Cash flow (TTM)Industry

Operating Cash Flow: -$149.88M; -$12.38M
Capital Expenditures: -$149.00K; -$1.00M
Free Cash Flow: -$150.02M; -$18.21M
FCF Per Share: -$1.34; -$0.42

Dividends and yieldsIndustry

Earnings Yield: 14.6%; -21.8%
FCF Yield: -52.9%; -9.44%

Taxes and interestIndustry

Income Tax: $358.00K; $73.00K
Effective Tax Rate: 0.86%; 20.9%

Scores and fair valueIndustry

Graham Number: $2.87; $19.34
Graham Upside: 12.9%; -46.6%
Altman Z-Score: -1.55; 0.23
Piotroski F-Score: 1; 4

Total return vs. the S&P 500

Price change plus reinvested dividends, to the close on Nov 13, 2026. The S&P 500 is measured by the SPY fund.

Period	ALEC	S&P 500	Difference	ALEC per year	S&P 500 per year
1 month	+35.8%	-3.0%	+38.9 pts
3 months	+24.5%	-2.8%	+27.3 pts
Year to date	+62.8%	+11.5%	+51.3 pts
1 year	+111.7%	+13.5%	+98.2 pts
3 years	-32.6%	+77.7%	−110.3 pts	-12.3%	+21.1%
5 years	-89.0%	+72.6%	−161.7 pts	-35.7%	+11.5%

Short interest

Shares sold short and not yet covered, reported by brokers to FINRA twice a month. Latest settlement date Oct 30, 2026.

8M ALEC shares were sold short on Oct 30, 2026, down 18.1% from the previous report, or 8.32% of the shares available to trade. At recent volumes it would take 3.6 days to buy them back. Over the last 20 sessions, 43.5% of the volume reported to FINRA was short selling.

Settlement date	Shares short	Change	Avg. daily volume	Days to cover
Oct 30, 2026	8,393,562	-18.1%	2,317,570	3.6
Oct 15, 2026	10,254,239	+66.8%	10,952,676	1.0
Sep 30, 2026	6,147,032	+0.7%	1,072,911	5.7
Sep 15, 2026	6,104,803	-1.0%	1,830,174	3.3
Aug 31, 2026	6,165,227	+4.5%	1,350,065	4.6
Aug 14, 2026	5,901,581	+4.6%	1,705,428	3.5
Jul 31, 2026	5,644,306	-0.4%	436,932	12.9
Jul 15, 2026	5,664,933	-0.9%	555,689	10.2
Jun 30, 2026	5,716,527	+8.9%	1,299,199	4.4
Jun 15, 2026	5,247,655	+3.2%	686,680	7.6
May 29, 2026	5,085,727	+4.7%	770,165	6.6
May 15, 2026	4,857,513	-2.8%	528,740	9.2