Alector, Inc ALEC

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Alector, Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 1.4800 · FX 1 USD = 1.288650 SGD · about SGD 1.9072 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 1.76 → 1.48 · -15.9%
3.3202.2301.140 1,2 3 4,5 6 7,8 9 10,11 12,13,14,15 16 17 Jul 25Oct 25Jan 26Apr 26Jul 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 26 Jul 2025 — 27 Jul 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
Weekend
Weekend
1.5000 1.5050 1.4550 1.4800 325,300
1.4800 1.5450 1.4700 1.4900 607,100
1.5300 1.5350 1.4900 1.5300 333,300
1.4200 1.5500 1.4200 1.5400 499,600
1.4900 1.5000 1.4150 1.4300 463,900
Weekend
Weekend
1.4300 1.5190 1.4200 1.5000 500,200
1.4000 1.5000 1.3900 1.4700 713,500
1.3900 1.5300 1.3700 1.5000 719,600
1.5300 1.5300 1.3700 1.3900 529,700
1.6000 1.6100 1.4950 1.5100 775,700
Weekend
Weekend
1.6300 1.6600 1.4750 1.6100 597,200
1.8300 1.8600 1.6000 1.6350 589,200
17 · 8-K After-hours · 16:05 ET 8-K ↗
1.9000 1.9400 1.8050 1.8300 643,800
1.9700 1.9700 1.8550 1.9300 416,200
2.0600 2.0650 1.9250 1.9400 588,500
Weekend
Weekend
No trading
2.0200 2.1450 1.9950 2.0600 394,000
1.9900 2.0700 1.9550 2.0100 368,500
2.1000 2.1350 1.9800 2.0100 609,400
1.8800 2.0900 1.7700 2.0800 544,200
Weekend
Weekend
1.8400 1.9550 1.8400 1.8600 3,845,400
1.7900 2.0200 1.7450 1.8500 2,828,200
1.7800 1.8700 1.7800 1.7900 510,400
1.7500 1.8700 1.7200 1.8300 854,000
1.7600 1.9200 1.7150 1.7800 1,592,800
Weekend
Weekend
No trading
1.5800 1.7700 1.5650 1.7500 1,108,400
16 · 8-K After-hours · 16:05 ET 8-K ↗
1.5500 1.6000 1.5300 1.5600 496,000
1.4700 1.5500 1.4100 1.5400 712,000
1.5600 1.5950 1.4600 1.4800 629,600
Weekend
Weekend
1.5800 1.6050 1.5300 1.5300 263,800
1.5200 1.7400 1.4850 1.5700 428,200
1.6900 1.6900 1.4850 1.5200 428,800
1.6400 1.6800 1.5850 1.6300 439,500
1.6500 1.6650 1.5700 1.6400 667,800
Weekend
Weekend
1.8100 1.8400 1.6250 1.6350 364,300
1.7900 1.9150 1.7900 1.8100 449,400
1.9400 1.9400 1.7050 1.7750 1,691,700
2.0400 2.0700 1.9200 1.9500 1,561,000
2.1600 2.1600 2.0700 2.0700 705,800
Weekend
Weekend
2.1500 2.2500 2.0500 2.1600 993,200
2.2100 2.2400 2.1000 2.1500 1,300,400
2.2000 2.2800 2.1700 2.2100 462,400
2.2100 2.3200 2.1200 2.1900 480,600
No trading
Weekend
Weekend
2.2200 2.2700 2.1700 2.2100 328,100
2.1100 2.2400 2.0100 2.2100 929,700
2.1100 2.2350 2.1100 2.1200 898,500
2.1000 2.1600 2.0190 2.1100 790,400
2.1300 2.1800 2.0450 2.1200 814,500
Weekend
Weekend
2.2400 2.2900 2.1400 2.1600 1,104,600
2.2400 2.3700 2.1970 2.3000 783,200
2.1200 2.2050 2.0900 2.1500 459,100
2.0300 2.2050 2.0300 2.1600 437,300
2.1000 2.2000 2.0050 2.0500 389,100
Weekend
Weekend
2.1200 2.3300 2.0930 2.1000 720,500
15 · 8-K After-hours · 17:15 ET 8-K ↗ 14 · 424B5 After-hours · 17:13 ET 424B5 ↗ 13 · 10-Q After-hours · 16:17 ET 10-Q ↗ 12 · 8-K After-hours · 16:12 ET 8-K ↗
2.5600 2.5600 2.4120 2.4400 276,500
2.5800 2.7000 2.5650 2.5700 470,600
2.5400 2.6150 2.5310 2.5700 361,200
2.3500 2.5450 2.3500 2.5100 447,500
Weekend
Weekend
2.3300 2.3850 2.2850 2.3600 420,300
2.2900 2.4350 2.1500 2.3700 713,200
2.3600 2.3820 2.2700 2.3000 369,000
11 · DEFA14A After-hours · 16:06 ET DEFA14A ↗ 10 · DEF 14A After-hours · 16:05 ET DEF 14A ↗
2.3500 2.4200 2.3500 2.3900 297,100
2.4100 2.4650 2.3300 2.3500 592,900
Weekend
Weekend
2.4200 2.5300 2.3600 2.4100 320,600
2.5200 2.5200 2.3750 2.4300 303,400
2.4800 2.7000 2.3700 2.4500 1,421,400
2.7000 2.7300 2.4500 2.4600 298,700
2.5600 2.7390 2.5600 2.7050 324,900
Weekend
Weekend
2.6200 2.6200 2.4900 2.5700 343,100
2.5200 2.6650 2.4700 2.5500 561,000
2.5300 2.6100 2.4950 2.5800 538,400
2.3500 2.4450 2.3400 2.4100 394,000
2.4400 2.4400 2.2750 2.3300 362,200
Weekend
Weekend
2.4000 2.5300 2.4000 2.4500 573,000
2.3800 2.4150 2.3400 2.4000 271,200
2.5800 2.6000 2.3850 2.4200 340,400
2.3400 2.4900 2.3000 2.4700 562,100
2.4100 2.4900 2.3250 2.3450 582,300
Weekend
Weekend
No trading
2.4500 2.5200 2.1250 2.4100 1,316,700
2.1800 2.6350 2.1600 2.5300 3,304,100
2.0300 2.1900 2.0300 2.1500 352,400
2.0200 2.0500 1.9500 2.0200 384,100
Weekend
Weekend
2.0900 2.1500 1.9800 2.0000 466,500
2.0300 2.1700 2.0300 2.1200 388,200
2.1200 2.2200 2.1200 2.1700 589,300
1.9700 2.1400 1.9700 2.0800 594,300
2.1100 2.1600 2.0350 2.0600 408,700
Weekend
Weekend
2.0600 2.1000 2.0050 2.0500 1,924,600
2.0000 2.1050 1.9600 2.0600 379,800
2.1900 2.2050 2.0050 2.0500 558,900
2.2200 2.2800 2.1690 2.2300 515,900
2.2900 2.2900 2.1900 2.2100 372,300
Weekend
Weekend
2.2400 2.3250 2.1350 2.2000 648,700
9 · S-3 After-hours · 16:08 ET S-3 ↗
2.2000 2.3200 2.2000 2.2300 623,700
2.3500 2.3750 2.2100 2.3200 813,200
2.3900 2.6500 2.3700 2.3800 1,822,900
1.9400 2.2050 1.9400 2.1900 939,000
Weekend
Weekend
1.9400 2.0300 1.8900 2.0000 684,100
2.1500 2.1500 1.9350 1.9800 1,100,200
2.2100 2.2100 2.0800 2.1500 734,000
2.1700 2.1700 2.0550 2.1100 647,100
2.3700 2.3700 2.0400 2.2100 1,992,200
Weekend
Weekend
2.5100 2.5290 2.3150 2.4300 1,337,500
2.1200 2.5700 2.0700 2.5600 1,311,400
8 · 10-K After-hours · 16:15 ET 10-K ↗ 7 · 8-K After-hours · 16:10 ET 8-K ↗
2.2000 2.4250 2.1850 2.3900 992,600
2.1000 2.2250 2.0600 2.1900 528,900
1.9800 2.1200 1.9300 2.1000 840,600
Weekend
Weekend
1.9700 2.0300 1.9300 1.9900 486,400
1.9800 2.0400 1.9400 2.0100 563,800
1.9900 2.0400 1.9450 1.9800 518,700
1.8800 2.0000 1.8600 1.9700 669,200
No trading
Weekend
Weekend
1.9000 2.0250 1.8400 1.8700 1,238,000
1.9300 1.9800 1.8800 1.9000 1,319,800
1.9600 1.9700 1.8600 1.9200 590,800
1.9800 1.9800 1.8900 1.9500 928,800
1.9000 1.9950 1.8850 1.9600 437,900
Weekend
Weekend
1.8300 1.9600 1.8300 1.9600 1,161,400
1.8100 1.9000 1.7450 1.8200 1,665,900
1.9600 1.9750 1.8700 1.9300 722,700
1.9800 2.0500 1.8850 1.9300 789,300
1.8700 2.0300 1.8400 1.9900 851,200
Weekend
Weekend
1.8700 1.9000 1.8100 1.8900 1,204,500
1.9300 1.9400 1.9000 1.9100 469,500
1.9600 1.9650 1.8500 1.9100 778,000
1.9500 1.9800 1.9100 1.9500 226,800
1.9300 2.0000 1.9000 1.9300 773,900
Weekend
Weekend
1.8900 1.9400 1.8800 1.9400 671,900
1.8720 1.9950 1.8720 1.9200 516,900
1.8200 1.9300 1.8050 1.9200 691,500
1.8100 1.8600 1.7650 1.8300 1,181,400
No trading
Weekend
Weekend
1.8000 1.9800 1.7800 1.8400 1,207,200
1.7900 1.8450 1.7400 1.8200 2,106,000
1.9200 1.9300 1.8400 1.8500 1,286,900
1.8500 1.9350 1.8000 1.9200 739,000
1.8400 1.8500 1.7100 1.8400 1,271,900
Weekend
Weekend
1.7900 1.8700 1.7600 1.8600 1,330,000
1.7000 1.7900 1.6910 1.7700 1,001,900
1.7100 1.7650 1.6850 1.7600 1,259,300
1.5800 1.7050 1.5550 1.6900 1,421,100
1.5100 1.6000 1.5100 1.6000 1,368,900
Weekend
Weekend
1.5700 1.6200 1.5000 1.5300 638,700
No trading
1.5100 1.5800 1.5050 1.5600 768,800
1.5200 1.5400 1.4900 1.5200 676,100
1.4400 1.5300 1.4400 1.5200 1,576,200
Weekend
Weekend
1.4400 1.4750 1.4030 1.4500 640,200
No trading
1.4200 1.4700 1.4200 1.4500 401,000
1.4200 1.4700 1.4000 1.4100 1,095,700
1.4000 1.4900 1.4000 1.4500 1,113,400
Weekend
Weekend
1.3700 1.4500 1.3500 1.4000 3,004,700
1.3600 1.4500 1.3440 1.3900 1,296,800
1.3900 1.4150 1.3350 1.3500 641,000
1.3900 1.4500 1.3500 1.3900 853,600
1.5200 1.5200 1.4200 1.4200 1,219,600
Weekend
Weekend
6 · 8-K After-hours · 16:10 ET 8-K ↗
1.4600 1.5400 1.4110 1.4900 1,474,100
1.3100 1.5400 1.2900 1.4600 5,002,400
1.2700 1.3100 1.2550 1.3000 978,000
1.2200 1.2900 1.1800 1.2800 2,353,000
1.2400 1.2700 1.2000 1.2200 1,642,700
Weekend
Weekend
1.2100 1.2600 1.1900 1.2200 1,355,400
1.1200 1.2500 1.1100 1.2100 2,787,900
1.1400 1.1570 1.0900 1.1400 2,416,700
1.2300 1.2400 1.1300 1.1400 1,397,900
1.3000 1.3200 1.2150 1.2300 1,215,500
Weekend
Weekend
1.3600 1.3600 1.3000 1.3300 569,500
No trading
1.2700 1.3900 1.2700 1.3500 1,338,800
1.2800 1.3400 1.2600 1.2800 821,600
1.2600 1.3000 1.2600 1.2800 1,359,100
Weekend
Weekend
1.2000 1.2850 1.1900 1.2400 1,066,300
1.2600 1.3500 1.1900 1.2000 2,114,200
1.2800 1.3500 1.2100 1.2200 1,529,900
1.2400 1.3300 1.2100 1.2700 1,709,400
1.1900 1.2950 1.1600 1.2400 1,616,400
Weekend
Weekend
1.2300 1.2950 1.2100 1.2400 1,648,000
1.3200 1.3600 1.1950 1.2000 2,597,400
1.3400 1.4350 1.3000 1.3400 2,700,800
1.3000 1.3850 1.3000 1.3600 1,343,600
1.2700 1.4090 1.2600 1.3100 1,712,400
Weekend
Weekend
1.2700 1.2900 1.1700 1.2800 1,976,900
5 · 10-Q After-hours · 16:17 ET 10-Q ↗ 4 · 8-K After-hours · 16:12 ET 8-K ↗
1.2500 1.3350 1.2200 1.3000 2,363,400
1.3200 1.3300 1.2500 1.2550 1,772,300
1.4000 1.4350 1.2900 1.3200 2,687,700
1.4600 1.5000 1.3900 1.4400 1,642,900
Weekend
Weekend
1.5200 1.5600 1.4000 1.4700 4,420,500
1.5500 1.6550 1.5000 1.5200 2,580,700
1.5100 1.6800 1.4900 1.5500 6,823,900
1.4800 1.5450 1.4450 1.5000 3,881,700
1.5400 1.6000 1.5000 1.5000 3,726,700
Weekend
Weekend
1.4700 1.5350 1.3300 1.5000 6,637,500
1.6100 1.6800 1.4600 1.4700 7,621,300
1.5400 1.7250 1.4900 1.6100 48,992,900
3 · 8-K After-hours · 16:08 ET 8-K ↗
3.2200 3.2700 3.0900 3.2100 4,470,700
3.0500 3.3350 3.0300 3.3100 1,166,400
Weekend
Weekend
3.1600 3.3300 3.0300 3.0400 1,043,300
3.2200 3.4000 3.1550 3.2200 1,757,400
2.9000 3.2300 2.8800 3.1900 1,724,400
3.0000 3.0660 2.8700 2.9900 987,700
3.0000 3.0700 2.9050 3.0400 1,163,700
Weekend
Weekend
3.1950 3.2400 3.0000 3.0200 866,000
3.0800 3.2250 3.0600 3.1400 1,112,100
3.1000 3.2500 3.0600 3.0800 1,021,200
3.1500 3.2100 3.0400 3.0700 1,064,200
3.2600 3.2950 3.1000 3.1800 983,900
Weekend
Weekend
3.1900 3.3300 3.1100 3.3200 2,591,000
3.0000 3.1700 2.9700 3.1600 1,069,600
2.8600 3.0300 2.8400 3.0000 1,028,300
3.0000 3.0500 2.8300 2.9600 964,900
3.0900 3.1600 3.0050 3.0500 555,900
Weekend
Weekend
2.9400 3.1550 2.9200 3.1000 1,024,400
3.1000 3.2000 2.8810 2.9300 1,095,000
3.1700 3.2800 3.1200 3.1600 576,200
3.1700 3.2800 3.1200 3.1800 949,200
2.9700 3.2550 2.9500 3.1800 1,113,400
Weekend
Weekend
3.1500 3.1500 3.0100 3.0300 2,304,800
3.0000 3.1700 2.9200 3.1300 708,600
2.7700 3.1800 2.7600 2.9500 1,322,400
2.9500 2.9800 2.7500 2.7600 581,600
2.7500 2.9600 2.7100 2.9600 925,000
Weekend
Weekend
2.8400 2.9550 2.7400 2.7500 6,128,200
2.8500 3.0000 2.7800 2.8700 436,400
2.7800 2.8800 2.7600 2.8400 867,700
2.7500 2.8500 2.7100 2.8000 674,000
3.0000 3.0000 2.7400 2.7600 1,266,700
Weekend
Weekend
2.8300 3.0700 2.8300 3.0100 1,658,200
2.7900 2.8950 2.7100 2.8200 1,038,800
2.6200 2.8600 2.6200 2.7900 1,557,500
2.3000 2.6490 2.3000 2.5900 1,750,000
No trading
Weekend
Weekend
2.3900 2.4400 2.3100 2.3500 465,100
2.4200 2.5100 2.3800 2.3900 712,900
2.3600 2.5500 2.3300 2.4000 683,800
2.3400 2.4090 2.3100 2.3600 625,500
2.5300 2.5600 2.3300 2.3400 841,000
Weekend
Weekend
2.2900 2.5600 2.2900 2.5200 1,343,900
2.1900 2.2850 2.0900 2.2700 677,900
2.1500 2.2300 2.0330 2.2000 1,290,100
2.0900 2.2850 2.0900 2.1600 1,404,300
2.2400 2.3200 2.1000 2.1300 1,392,700
Weekend
Weekend
2.4500 2.4500 2.2200 2.2500 1,610,700
2.1400 2.5000 2.1250 2.4600 2,445,300
2.0200 2.2300 2.0100 2.1800 1,549,500
2.2500 2.3000 1.9900 2.0000 1,719,900
2.2000 2.4150 2.1050 2.2300 4,210,200
Weekend
Weekend
1.6300 2.2200 1.5400 2.1500 8,927,400
2 · 10-Q After-hours · 16:17 ET 10-Q ↗ 1 · 8-K After-hours · 16:11 ET 8-K ↗
1.4300 1.4700 1.4200 1.4600 651,800
1.5700 1.5700 1.4300 1.4300 518,400
1.5600 1.5950 1.5100 1.5600 603,500
1.4500 1.5500 1.4350 1.5500 487,400
Weekend
Weekend
1.4700 1.4900 1.4200 1.4500 737,100
1.6000 1.6350 1.4650 1.4900 650,900
1.6300 1.7300 1.5600 1.6000 657,200
1.7900 1.8100 1.6000 1.6100 627,600
1.9100 1.9990 1.7600 1.7600 1,221,500
Weekend
Weekend

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

17 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
15 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:15 ET Summarise
14 424B5 424B5 (opens SEC filing in a new tab) After-hours · 17:13 ET Summarise
13 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:17 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
11 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
10 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
9 S-3 S-3 (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
8 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
7 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
5 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:17 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:17 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise