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Public ownership evidence

Alector, Inc. Common Stock (ALEC) Ownership Disclosures

Read ALEC insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-10-152026-10-13Rosenthal ArnonA457,038Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-13 and its public availability date is 2026-10-15. Subtracting those calendar dates gives 2 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code A: a award. An award is an acquisition but is not an open-market purchase. A purchase-following rule must not count it as code P.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001193125-26-422869 ↗SEC 0001193125-26-422869 ↗SEC 0001193125-26-422869 ↗

Recent Form 4 activity

Inspect all 24 displayed rows: Recent Form 4 activity

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2026-10-152026-10-13Rosenthal ArnonA457,038Not reported
2026-10-152026-10-13Rosenthal ArnonA520,000Not reported
2026-10-152026-10-13Rosenthal ArnonA275,000Not reported
2026-10-152026-10-13Rosenthal ArnonA500,000Not reported
2026-10-152026-10-14Rosenthal ArnonA978,750Not reported
2026-10-152026-10-13Rosenthal ArnonA132,500Not reported
2026-10-152026-10-13Rosenthal ArnonA119,446Not reported
2026-10-152026-10-13Rosenthal ArnonA417,213Not reported
2026-10-152026-10-14Rosenthal ArnonA217,500Not reported
2026-10-152026-10-13Wong-Sarad GraceA10,228Not reported
2026-10-152026-10-13Wong-Sarad GraceA20,454Not reported
2026-10-152026-10-13Wong-Sarad GraceA13,842Not reported
2026-10-152026-10-13Wong-Sarad GraceA20,000Not reported
2026-10-152026-10-14Wong-Sarad GraceA83,435Not reported
2026-10-152026-10-13Wong-Sarad GraceA11,309Not reported
2026-10-152026-10-13Wong-Sarad GraceA11,552Not reported
2026-10-152026-10-14Wong-Sarad GraceA55,555Not reported
2026-10-152026-10-14Berkley Neil LindsayA44,567Not reported
2026-10-152026-10-14Berkley Neil LindsayA190,000Not reported
2026-09-052026-09-04Wong-Sarad GraceS3,625Not reported
2026-09-052026-09-03Wong-Sarad GraceS5,165Not reported
2026-09-052026-09-02Wong-Sarad GraceS656Not reported
2026-09-052026-09-03Rosenthal ArnonS72,606Not reported
2026-09-052026-09-03Berkley Neil LindsayS29,251Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-251,274$2,561None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-252,561$1,274,000None
Nantahala Capital Management, LLC2026-06-302026-08-204,318,109$8,679,399None
CANTOR FITZGERALD, L. P.2026-06-302026-08-20295,492$593,939None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2025,504$51,263None
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO2026-06-302026-08-18119,769$240,736None
Graham Capital Management, L.P.2026-06-302026-08-1546,496$93,457None
SEI INVESTMENTS CO2026-06-302026-08-1571,151$143,014None
Federation des caisses Desjardins du Quebec2026-06-302026-08-15415$834None
JPL Wealth Management, LLC2026-06-302026-08-1518$37None
Basecamp Wealth Advisors LLC2026-06-302026-08-15446$896None
ADAR1 Capital Management, LLC2026-06-302026-08-152,883,583$5,796,002None
Kynam Capital Management, LP2026-06-302026-08-153,808,494$7,655,073None
XTX Topco Ltd2026-06-302026-08-15399,681$803,359None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15818,831$1,645,850None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15818,831$1,645,850None
Qube Research & Technologies Ltd2026-06-302026-08-1516,569$33,304None
Eversept Partners, LP2026-06-302026-08-151,423,873$2,861,985None
OSAIC HOLDINGS, INC.2026-06-302026-08-15300$603None
MetLife Investment Management, LLC2026-06-302026-08-1558,696$117,979None
JANE STREET GROUP, LLC2026-06-302026-08-15120,100$241,401Call
LMR Partners LLP2026-06-302026-08-15200,000$402,000None
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-15532,850$1,071,029None
Utah Retirement Systems2026-06-302026-08-15154,290$310,123None
Legal & General Group Plc2026-06-302026-08-158,346$16,775None
Jasper Ridge Partners, L.P.2026-06-302026-08-1573,531$147,797None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15135,900$273,159Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1512,400$24,924Put
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1524,123$48,487None
Ikarian Capital, LLC2026-06-302026-08-151,982,606$3,985,038None
Verdad Advisers, LP2026-06-302026-08-1560,509$121,623None
683 Capital Management, LLC2026-06-302026-08-153,200,000$6,432,000None
DAFNA Capital Management LLC2026-06-302026-08-15908,351$1,825,786None
NANO CAP NEW MILLENNIUM GROWTH FUND L P2026-06-302026-08-15200,000$402,000None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-151,988,835$3,997,558None
TCG Crossover Management, LLC2026-06-302026-08-1510,000,000$20,100,000None
DEERFIELD MANAGEMENT COMPANY, L.P.2026-06-302026-08-151,055,192$2,120,936None
Blackstone Inc.2026-06-302026-08-1577,145$155,061None
Balyasny Asset Management L.P.2026-06-302026-08-153,247,426$6,527,326None
Balyasny Asset Management L.P.2026-06-302026-08-15503,900$1,012,839Call
AMERIPRISE FINANCIAL INC2026-06-302026-08-15224,530$451,305None
Cerity Partners LLC2026-06-302026-08-154,834$9,717None
Cerity Partners LLC2026-06-302026-08-1527,687$55,650None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-153,420$6,874None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1547$94None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-155,096$10,243None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-151,296,305$2,605,573None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-1522$44None
AQR CAPITAL MANAGEMENT LLC2026-06-302026-08-154,687$9,421None
MANUFACTURERS LIFE INSURANCE COMPANY, THE2026-06-302026-08-1519,397$38,988None

90-day public filing window, up to 50 source positions.

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Nantahala Capital Management, LLC ↗CANTOR FITZGERALD, L. P. ↗MERCER GLOBAL ADVISORS INC /ADV ↗PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO ↗Graham Capital Management, L.P. ↗SEI INVESTMENTS CO ↗Federation des caisses Desjardins du Quebec ↗JPL Wealth Management, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.