ALECTOR INC (ALEC) Institutional Shareholders
ALECTOR INC (ALEC) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $183.39M in ALEC holdings during the latest filing period.
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 $18.50M, representing an estimated loss of -7.96% 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
137
Total Reported Value
$183.39M
Largest Holder
Tcg Crossover Management, Llc
Largest Position
$20.10M
Insider Transactions (90d)
8
Latest Filing Quarter
Q2 2026
New Institutional Positions
133
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 | $18,500,000 | -$1,600,000 | -7.96% | |
| Blackrock, Inc. | 0.00% | 7,847,879 | $15,774,236 | $14,518,576 | -$1,255,660 | -7.96% | |
| Acadian Asset Management Llc | 0.01% | 4,414,345 | $8,863,000 | $8,166,538 | -$696,462 | -7.86% | |
| Nantahala Capital Management, Llc | 0.52% | 4,318,109 | $8,679,399 | $7,988,502 | -$690,897 | -7.96% | |
| Vanguard Capital Management Llc | 0.00% | 4,009,340 | $8,058,773 | $7,417,279 | -$641,494 | -7.96% | |
| Kynam Capital Management, Lp | 0.42% | 3,808,494 | $7,655,073 | $7,045,714 | -$609,359 | -7.96% | |
| Merck & Co., Inc. | 1.35% | 3,545,719 | $7,126,896 | $6,559,580 | -$567,316 | -7.96% | |
| Balyasny Asset Management L.P. | 0.01% | 3,247,426 | $6,527,326 | $6,007,738 | -$519,588 | -7.96% | |
| 683 Capital Management, Llc | 0.59% | 3,200,000 | $6,432,000 | $5,920,000 | -$512,000 | -7.96% | |
| D. E. Shaw & Co., Inc. | 0.00% | 2,959,983 | $5,949,566 | $5,475,969 | -$473,597 | -7.96% | |
| Adar1 Capital Management, Llc | 0.27% | 2,883,583 | $5,796,002 | $5,334,629 | -$461,373 | -7.96% | |
| Vanguard Portfolio Management Llc | 0.00% | 2,820,493 | $5,669,191 | $5,217,912 | -$451,279 | -7.96% | |
| Geode Capital Management, Llc | 0.00% | 2,454,271 | $4,934,077 | $4,540,401 | -$393,676 | -7.98% | |
| Spruce Street Capital Lp | 0.83% | 2,101,068 | $4,223,147 | $3,886,976 | -$336,171 | -7.96% | |
| Millennium Management Llc | 0.00% | 1,988,835 | $3,997,558 | $3,679,345 | -$318,213 | -7.96% | |
| Ikarian Capital, Llc | 0.65% | 1,982,606 | $3,985,038 | $3,667,821 | -$317,217 | -7.96% | |
| State Street Corp | 0.00% | 1,879,765 | $3,778,328 | $3,477,565 | -$300,763 | -7.96% | |
| Jacobs Levy Equity Management, Inc | 0.01% | 1,765,929 | $3,549,517 | $3,266,969 | -$282,548 | -7.96% | |
| Medici Capital Llc | 6.51% | 1,652,520 | $3,321,565 | $3,057,162 | -$264,403 | -7.96% | |
| Affinity Asset Advisors, Llc | 0.15% | 1,510,000 | $3,035,100 | $2,793,500 | -$241,600 | -7.96% | |
| Eversept Partners, Lp | 0.16% | 1,423,873 | $2,861,985 | $2,634,165 | -$227,820 | -7.96% | |
| Fmr Llc | 0.00% | 1,396,398 | $2,806,759 | $2,583,336 | -$223,423 | -7.96% | |
| Aqr Capital Management Llc | 0.00% | 1,309,577 | $2,632,249 | $2,422,717 | -$209,532 | -7.96% | |
| Euclidean Capital Llc | 0.60% | 1,307,858 | $2,628,795 | $2,419,537 | -$209,258 | -7.96% | |
| Mackenzie Financial Corp | 0.00% | 1,109,770 | $2,230,638 | $2,053,075 | -$177,564 | -7.96% | |
| Deutsche Bank Ag\ | 0.00% | 1,098,388 | $2,207,760 | $2,032,018 | -$175,742 | -7.96% | |
| Deerfield Management Company, L.P. | 0.02% | 1,055,192 | $2,120,936 | $1,952,105 | -$168,831 | -7.96% | |
| Two Sigma Investments, Lp | 0.00% | 1,045,376 | $2,101,206 | $1,933,946 | -$167,260 | -7.96% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 935,166 | $1,879,684 | $1,730,057 | -$149,627 | -7.96% |
| Dafna Capital Management Llc | 0.35% | 908,351 | $1,825,786 | $1,680,449 | -$145,337 | -7.96% | |
| Elmind Capital, Lp | 0.45% | 900,000 | $1,809,000 | $1,665,000 | -$144,000 | -7.96% | |
| Panagora Asset Management Inc | 0.01% | 845,999 | $1,700,458 | $1,565,098 | -$135,360 | -7.96% | |
| Charles Schwab Investment Management Inc | 0.00% | 818,831 | $1,645,850 | $1,514,837 | -$131,013 | -7.96% | |
| Northern Trust Corp | 0.00% | 773,462 | $1,554,659 | $1,430,905 | -$123,754 | -7.96% | |
| Vanguard Fiduciary Trust Co | 0.00% | 663,592 | $1,333,820 | $1,227,645 | -$106,175 | -7.96% | |
| Marshall Wace, Llp | 0.00% | 598,559 | $1,203,105 | $1,107,334 | -$95,771 | -7.96% | |
| Boothbay Fund Management, Llc | 0.02% | 532,850 | $1,071,029 | $985,773 | -$85,257 | -7.96% | |
| Goldman Sachs Group Inc | 0.00% | 433,875 | $872,089 | $802,669 | -$69,420 | -7.96% | |
| Xtx Topco Ltd | 0.01% | 399,681 | $803,359 | $739,410 | -$63,949 | -7.96% | |
| Citadel Advisors Llc | 0.00% | 391,232 | $786,376 | $723,779 | -$62,597 | -7.96% | |
| Cantor Fitzgerald, L. P. | 0.01% | 295,492 | $593,939 | $546,660 | -$47,279 | -7.96% | |
| Ubs Group Ag | 0.00% | 273,780 | $550,298 | $506,493 | -$43,805 | -7.96% | |
| Invesco Ltd. | 0.00% | 257,139 | $516,849 | $475,707 | -$41,142 | -7.96% | |
| Bank Of New York Mellon Corp | 0.00% | 250,093 | $502,688 | $462,672 | -$40,016 | -7.96% | |
| Ameriprise Financial Inc | 0.00% | 224,530 | $451,305 | $415,381 | -$35,925 | -7.96% | |
| Lmr Partners Llp | 0.00% | 200,000 | $402,000 | $370,000 | -$32,000 | -7.96% | |
| Nano Cap New Millennium Growth Fund L P | 0.31% | 200,000 | $402,000 | $370,000 | -$32,000 | -7.96% | |
| Nuveen, Llc | 0.00% | 176,234 | $354,230 | $326,033 | -$28,197 | -7.96% | |
| Utah Retirement Systems | 0.00% | 154,290 | $310,123 | $285,437 | -$24,687 | -7.96% | |
| Bank Of America Corp | 0.00% | 142,678 | $286,783 | $263,954 | -$22,829 | -7.96% |
Frequently asked questions about ALEC
Who owns the most ALEC stock?
The largest holders of ALEC are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ALECTOR INC (ALEC).
Is ALEC widely held by superinvestors?
Many widely followed stocks like ALEC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ALEC is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.