Alector Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

DB:0Z2 Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
10 Mar 26	Sell€2,276	Grace Wong-Sarad	Individual	1,000	€2.28
02 Mar 26	Sell€148,826	Arnon Rosenthal	Individual	81,864	€1.82
02 Mar 26	Sell€53,901	Neil Berkley	Individual	29,649	€1.82
03 Dec 25	Sell€40,013	Saraswati Kenkare-Mitra	Individual	41,687	€0.96
03 Dec 25	Sell€100,156	Arnon Rosenthal	Individual	104,347	€0.96
03 Dec 25	Sell€7,732	Grace Wong-Sarad	Individual	8,056	€0.96
03 Dec 25	Sell€35,764	Neil Berkley	Individual	37,261	€0.96
02 Sep 25	Sell€110,407	Arnon Rosenthal	Individual	51,562	€2.14
02 Sep 25	Sell€50,615	Saraswati Kenkare-Mitra	Individual	23,638	€2.14
02 Sep 25	Sell€33,922	Neil Berkley	Individual	15,842	€2.14
02 Sep 25	Sell€12,655	Grace Wong-Sarad	Individual	5,910	€2.14
20 Jun 25	Sell€1,249	Kristine Yaffe	Individual	1,000	€1.25
02 Jun 25	Sell€60,957	Arnon Rosenthal	Individual	52,087	€1.17
02 Jun 25	Sell€27,958	Saraswati Kenkare-Mitra	Individual	23,890	€1.17
02 Jun 25	Sell€19,296	Marc Grasso	Individual	16,488	€1.17

Insider Trading Volume

Insider Buying: 0Z2 insiders have only sold shares in the past 3 months.

Ownership Breakdown

What is the ownership structure of 0Z2?
Owner Type	Number of Shares	Ownership Percentage
Individual Insiders	6,936,052	6.25%
General Public	9,543,980	8.6%
VC/PE Firms	10,000,000	9.01%
Institutions	84,545,155	76.1%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 72.23% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
9.01%	TCG Crossover Management, LLC	10,000,000	€19.0m	0%	0.58%
6.97%	BlackRock, Inc.	7,741,245	€14.7m	8.3%	no data
5.15%	Arnon Rosenthal	5,717,610	€10.9m	0.9%	no data
4.37%	Polaris Venture Partners, Inc.	4,853,817	€9.2m	-29.2%	19.68%
3.64%	Acadian Asset Management LLC	4,038,785	€7.7m	17.3%	0.01%
3.5%	Foresite Capital Management, LLC	3,887,200	€7.4m	0%	0.8%
3.31%	Vanguard Capital Management, LLC	3,678,722	€7.0m	0%	no data
3.19%	MRL Ventures Fund LLC	3,545,719	€6.7m	0%	3.26%
3%	D. E. Shaw & Co., L.P.	3,332,835	€6.3m	40.9%	0.01%
2.88%	683 Capital Management, LLC	3,200,000	€6.1m	-4.48%	0.62%
2.64%	Balyasny Asset Management L.P.	2,935,253	€5.6m	-10.1%	0.01%
2.54%	Nantahala Capital Management, LLC	2,815,983	€5.3m	0%	0.38%
2.33%	Vanguard Portfolio Management, LLC	2,583,542	€4.9m	0%	no data
2.06%	Geode Capital Management, LLC	2,286,218	€4.3m	10.2%	no data
1.94%	Jacobs Levy Equity Management Inc	2,154,361	€4.1m	-0.87%	0.02%
1.89%	Spruce Street Capital LP	2,101,068	€4.0m	87.9%	1.06%
1.88%	Ikarian Capital, LLC	2,082,606	€4.0m	0%	0.74%
1.8%	Kynam Capital Management, LP	2,000,000	€3.8m	0%	0.3%
1.78%	Millennium Management LLC	1,979,226	€3.8m	48.5%	no data
1.68%	State Street Global Advisors, Inc.	1,865,526	€3.5m	2.82%	no data
1.62%	FMR LLC	1,796,008	€3.4m	-19.5%	no data
1.49%	Medici Capital LLC	1,652,520	€3.1m	10.1%	5.71%
1.22%	Eversept Partners, L.P.	1,351,106	€2.6m	34.3%	0.2%
1.18%	Euclidean Capital LLC	1,307,858	€2.5m	0%	0.69%
1.16%	Renaissance Technologies LLC	1,287,691	€2.4m	-16.6%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/05/25 22:52
End of Day Share Price	2026/05/25 00:00
Earnings	2026/03/31
Annual Earnings	2025/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Alector, Inc. is covered by 13 analysts. 8 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Alec Stranahan	BofA Global Research
Thomas Shrader	BTIG
Pete Stavropoulos	Cantor Fitzgerald & Co.