ALEC Institutional Ownership & Shareholders
ALECTOR INC (ALEC) is currently held by 136 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $183.66M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Tcg Crossover Management, Llc is currently the largest disclosed institutional shareholder of ALEC tracked by InsiderSet, reporting ownership valued at approximately $20.10M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $22.10M, representing an estimated gain of +9.95% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 52% of the total disclosed ALEC value among the investors covered in this analysis. Major shareholders include Tcg Crossover Management, Llc, Blackrock, Inc., Acadian Asset Management Llc, and several other long-term asset managers with concentrated positions in ALECTOR INC (ALEC).
This page ranks the largest institutional ALEC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
136
Total Reported Value
$183.66M
Largest Holder
Tcg Crossover Management, Llc
Largest Position
$20.10M
Insider Transactions (90d)
10
Latest Filing Quarter
Q2 2026
New Institutional Positions
118
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Tcg Crossover Management, Llc | 0.48% | 10,000,000 | $20,100,000 | $22,100,000 | +$2,000,000 | +9.95% | |
| Blackrock, Inc. | 0.00% | 7,847,879 | $15,774,236 | $17,343,813 | +$1,569,577 | +9.95% | |
| Acadian Asset Management Llc | 0.01% | 4,414,345 | $8,863,000 | $9,755,702 | +$892,702 | +10.07% | |
| Nantahala Capital Management, Llc | 0.52% | 4,318,109 | $8,679,399 | $9,543,021 | +$863,622 | +9.95% | |
| Vanguard Capital Management Llc | 0.00% | 4,009,340 | $8,058,773 | $8,860,641 | +$801,868 | +9.95% | |
| Kynam Capital Management, Lp | 0.42% | 3,808,494 | $7,655,073 | $8,416,772 | +$761,699 | +9.95% | |
| Merck & Co., Inc. | 1.35% | 3,545,719 | $7,126,896 | $7,836,039 | +$709,143 | +9.95% | |
| Balyasny Asset Management L.P. | 0.01% | 3,247,426 | $6,527,326 | $7,176,811 | +$649,485 | +9.95% | |
| 683 Capital Management, Llc | 0.59% | 3,200,000 | $6,432,000 | $7,072,000 | +$640,000 | +9.95% | |
| D. E. Shaw & Co., Inc. | 0.00% | 2,959,983 | $5,949,566 | $6,541,562 | +$591,996 | +9.95% | |
| Adar1 Capital Management, Llc | 0.27% | 2,883,583 | $5,796,002 | $6,372,718 | +$576,716 | +9.95% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,820,493 | $5,669,191 | $6,233,290 | +$564,099 | +9.95% | |
| Geode Capital Management, Llc | 0.00% | 2,454,271 | $4,934,077 | $5,423,939 | +$489,862 | +9.93% | |
| Spruce Street Capital Lp | 0.83% | 2,101,068 | $4,223,147 | $4,643,360 | +$420,213 | +9.95% | |
| Millennium Management Llc | 0.00% | 1,988,835 | $3,997,558 | $4,395,325 | +$397,767 | +9.95% | |
| Ikarian Capital, Llc | 0.65% | 1,982,606 | $3,985,038 | $4,381,559 | +$396,521 | +9.95% | |
| State Street Corp | 0.00% | 1,879,765 | $3,778,328 | $4,154,281 | +$375,953 | +9.95% | |
| Jacobs Levy Equity Management, Inc | 0.01% | 1,765,929 | $3,549,517 | $3,902,703 | +$353,186 | +9.95% | |
| Medici Capital Llc | 6.51% | 1,652,520 | $3,321,565 | $3,652,069 | +$330,504 | +9.95% | |
| Affinity Asset Advisors, Llc | 0.15% | 1,510,000 | $3,035,100 | $3,337,100 | +$302,000 | +9.95% | |
| Eversept Partners, Lp | 0.16% | 1,423,873 | $2,861,985 | $3,146,759 | +$284,774 | +9.95% | |
| Fmr Llc | 0.00% | 1,396,398 | $2,806,759 | $3,086,040 | +$279,281 | +9.95% | |
| Mackenzie Financial Corp | 0.00% | 1,461,163 | $2,703,152 | $3,229,170 | +$526,018 | +19.46% | |
| Aqr Capital Management Llc | 0.00% | 1,309,577 | $2,632,249 | $2,894,165 | +$261,916 | +9.95% | |
| Euclidean Capital Llc | 0.60% | 1,307,858 | $2,628,795 | $2,890,366 | +$261,571 | +9.95% | |
| Deutsche Bank Ag\ | 0.00% | 1,098,388 | $2,207,760 | $2,427,437 | +$219,677 | +9.95% | |
| Deerfield Management Company, L.P. | 0.02% | 1,055,192 | $2,120,936 | $2,331,974 | +$211,038 | +9.95% | |
| Two Sigma Investments, Lp | 0.00% | 1,045,376 | $2,101,206 | $2,310,281 | +$209,075 | +9.95% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 935,166 | $1,879,684 | $2,066,717 | +$187,033 | +9.95% |
| Dafna Capital Management Llc | 0.35% | 908,351 | $1,825,786 | $2,007,456 | +$181,670 | +9.95% | |
| Elmind Capital, Lp | 0.45% | 900,000 | $1,809,000 | $1,989,000 | +$180,000 | +9.95% | |
| Panagora Asset Management Inc | 0.01% | 845,999 | $1,700,458 | $1,869,658 | +$169,200 | +9.95% | |
| Charles Schwab Investment Management Inc | 0.00% | 818,831 | $1,645,850 | $1,809,617 | +$163,767 | +9.95% | |
| Northern Trust Corp | 0.00% | 773,462 | $1,554,659 | $1,709,351 | +$154,692 | +9.95% | |
| Vanguard Fiduciary Trust Co | 0.00% | 663,592 | $1,333,820 | $1,466,538 | +$132,718 | +9.95% | |
| Marshall Wace, Llp | 0.00% | 598,559 | $1,203,105 | $1,322,815 | +$119,710 | +9.95% | |
| Boothbay Fund Management, Llc | 0.02% | 532,850 | $1,071,029 | $1,177,599 | +$106,570 | +9.95% | |
| Goldman Sachs Group Inc | 0.00% | 433,875 | $872,089 | $958,864 | +$86,775 | +9.95% | |
| Xtx Topco Ltd | 0.01% | 399,681 | $803,359 | $883,295 | +$79,936 | +9.95% | |
| Citadel Advisors Llc | 0.00% | 391,232 | $786,376 | $864,623 | +$78,247 | +9.95% | |
| Cantor Fitzgerald, L. P. | 0.01% | 295,492 | $593,939 | $653,037 | +$59,098 | +9.95% | |
| Ubs Group Ag | 0.00% | 273,780 | $550,298 | $605,054 | +$54,756 | +9.95% | |
| Invesco Ltd. | 0.00% | 257,139 | $516,849 | $568,277 | +$51,428 | +9.95% | |
| Bank Of New York Mellon Corp | 0.00% | 250,093 | $502,688 | $552,706 | +$50,018 | +9.95% | |
| Ameriprise Financial Inc | 0.00% | 224,530 | $451,305 | $496,211 | +$44,906 | +9.95% | |
| Lmr Partners Llp | 0.00% | 200,000 | $402,000 | $442,000 | +$40,000 | +9.95% | |
| Nano Cap New Millennium Growth Fund L P | 0.31% | 200,000 | $402,000 | $442,000 | +$40,000 | +9.95% | |
| Nuveen, Llc | 0.00% | 176,234 | $354,230 | $389,477 | +$35,247 | +9.95% | |
| Utah Retirement Systems | 0.00% | 154,290 | $310,123 | $340,981 | +$30,858 | +9.95% | |
| Bank Of America Corp | 0.00% | 142,678 | $286,783 | $315,318 | +$28,535 | +9.95% |
Frequently asked questions about ALEC
Who are the largest institutional holders of ALEC?
The largest institutional holders of ALEC reported in the latest SEC Form 13F filings include Tcg Crossover Management, Llc, Blackrock, Inc., Acadian Asset Management Llc, Nantahala Capital Management, Llc, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported ALEC position.
What is ALEC institutional ownership?
This page tracks ALEC positions reported by institutional investment managers through SEC Form 13F. ALECTOR INC (ALEC) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ALEC?
InsiderSet currently tracks 136 institutional managers reporting ALEC holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ALEC shareholders.
How much ALEC stock do institutions own?
Institutional investment managers disclosed approximately $183.66M in ALEC holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ALEC institutional ownership last updated?
The latest ALEC institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ALEC holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ALEC position after the reporting date.
Are institutions buying or selling ALEC?
Institutional buying and selling can be analyzed by comparing ALEC positions across consecutive 13F reporting periods. InsiderSet's ALEC Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ALEC ownership changes.
How has ALEC institutional ownership changed over time?
InsiderSet tracks ALEC institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.