Alnylam Pharmaceuticals, Inc ALNY

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Alnylam Pharmaceuticals, Inc. - Common Stock · Company · Nasdaq · Healthcare / Biotechnology

Paper trade (simulated — no real money)

Fill: USD 282.1200 · FX 1 USD = 1.291330 SGD · about SGD 364.3100 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 324.79 → 282.12 · -13.1%
491.220379.105266.990 1,2 3 4 5 6,7 8 9 10 11,12 13 14,15 16,17 18 Jul 25Oct 25Jan 26Apr 26Jul 26

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

Price & SEC Filing History 27 Jul 2025 — 28 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
274.4700 284.6800 272.6600 282.1200 800,381
Weekend
Weekend
268.7400 275.5800 265.6400 271.7700 1,150,900
265.9500 269.2200 262.2100 268.7400 1,140,800
270.8400 273.7200 264.2100 266.9900 1,104,600
272.4000 278.3000 270.0100 271.3700 982,800
267.5500 275.2500 266.2700 272.6700 1,359,300
Weekend
Weekend
280.9900 284.3600 266.4300 267.4700 1,378,100
279.6500 286.6000 273.7800 283.1500 1,436,200
281.7000 284.8000 275.8400 279.1400 1,284,900
283.5500 286.7600 279.4300 281.2600 1,093,100
298.0100 298.7600 279.4100 288.0600 2,682,700
Weekend
Weekend
314.7100 322.4900 293.7800 298.7600 2,538,100
378.4900 380.0000 311.1000 312.7900 5,865,000
318.5000 325.3700 316.7800 323.5000 897,700
317.0700 321.9800 315.3500 321.5900 980,400
319.3400 319.3400 307.1300 313.0400 891,800
Weekend
Weekend
No trading
303.8700 317.1700 303.0000 312.7800 1,093,400
304.5400 309.2800 301.5000 301.6700 1,070,500
296.8200 302.7400 295.1800 301.0300 1,411,100
296.9700 298.2800 291.9000 293.5200 1,367,300
Weekend
Weekend
297.5700 302.9600 290.3700 291.3700 1,490,600
293.6800 298.3500 290.0700 293.1700 1,128,200
290.9500 303.4600 288.8500 294.0600 1,299,600
290.8900 291.9500 285.2600 288.1800 1,087,500
278.4200 286.6700 278.1700 286.4100 1,420,600
Weekend
Weekend
No trading
280.1100 282.9800 273.1100 278.0900 2,204,500
281.3100 288.0000 277.7800 282.7200 1,322,200
288.1300 288.4800 276.9400 281.9000 1,213,300
282.9200 288.1100 281.3600 287.8000 1,118,500
Weekend
Weekend
288.9600 291.2800 281.7700 282.8500 1,420,000
290.7000 292.9800 285.2200 289.3900 1,061,500
297.6900 299.7000 290.5300 291.2200 927,300
297.3100 302.8500 293.9700 297.6900 1,259,800
303.1100 303.5700 285.5400 292.1600 1,651,400
Weekend
Weekend
306.3400 306.7300 300.5000 303.0500 1,004,400
297.2200 310.5300 293.8500 303.6400 1,081,400
284.4800 293.1600 283.1000 292.5800 988,800
293.9400 295.6000 285.0000 286.1200 1,042,500
299.5100 303.9800 295.1300 295.6300 1,186,000
Weekend
Weekend
302.4300 305.6800 297.6200 301.9800 2,278,000
293.0000 305.9800 291.8400 305.0600 1,020,700
18 · 8-K After-hours · 16:30 ET 8-K ↗
293.4000 299.9800 292.9100 295.6300 629,500
299.0000 301.0900 294.2600 295.5000 649,700
No trading
Weekend
Weekend
299.1200 303.3300 294.9900 297.4500 681,300
296.6400 301.4300 293.0000 300.5100 650,200
297.8000 300.0800 292.1000 298.4800 799,200
289.0000 294.9300 284.3800 294.3000 769,900
287.1400 291.9700 285.2600 286.2700 873,400
Weekend
Weekend
294.7800 298.0000 286.7600 286.9800 1,149,400
290.7200 297.0000 287.5100 293.4500 889,700
290.7000 298.3800 288.5600 291.4800 975,800
288.6600 295.8600 286.7300 292.0300 826,100
294.1500 296.3700 284.2800 284.8400 1,287,600
Weekend
Weekend
295.9100 300.1700 293.0600 295.0500 926,800
300.5500 303.4600 293.7800 295.9100 1,144,000
301.5700 306.0300 298.9600 303.0000 1,012,300
297.8100 302.6700 295.0200 301.1100 823,900
298.0000 300.4900 288.0600 297.9300 1,590,500
Weekend
Weekend
308.7600 311.8800 295.7900 296.1100 1,132,900
307.4800 317.5600 287.0000 309.4900 2,192,100
17 · 10-Q Pre-market · 08:16 ET 10-Q ↗ 16 · 8-K Pre-market · 08:04 ET 8-K ↗
300.4800 304.2200 294.0600 301.1900 1,569,600
308.9700 314.1700 301.8000 302.1100 996,200
303.8700 314.7400 303.7000 308.5100 1,093,400
Weekend
Weekend
309.6300 311.1000 302.9000 305.5400 825,600
313.5900 315.8300 310.7900 313.7900 588,300
308.4300 312.6900 307.8500 310.5800 1,003,700
307.3200 310.5000 301.6300 308.4300 1,510,800
306.5600 312.2500 305.0000 310.9400 966,400
Weekend
Weekend
326.0900 326.5300 306.0000 309.6600 1,495,100
333.3900 333.3900 318.9300 320.1300 1,022,800
341.6300 342.2300 331.0200 333.3900 799,100
330.8100 343.3600 330.5400 339.4100 1,228,600
320.6600 333.5600 319.0000 333.0000 967,600
Weekend
Weekend
323.4900 328.9300 317.5300 322.1100 698,600
325.6700 326.9000 318.7700 321.2800 1,119,200
327.4900 330.3000 324.4400 327.2500 1,024,700
319.4800 322.3500 313.5400 319.5200 1,305,100
15 · DEFA14A After-hours · 16:31 ET DEFA14A ↗ 14 · DEF 14A After-hours · 16:30 ET DEF 14A ↗
320.1000 335.5800 320.1000 330.3400 1,276,400
Weekend
Weekend
No trading
323.0300 325.4900 315.9000 318.8500 872,500
332.6900 335.4800 327.5900 328.7300 673,300
319.0600 332.4800 318.3700 330.8700 1,352,300
319.3200 321.7600 314.2100 316.0900 1,223,900
Weekend
Weekend
327.1000 329.6900 316.8500 317.3600 815,900
328.9000 332.8100 327.6900 328.1600 1,119,700
313.3400 329.4800 311.7100 328.7000 1,139,600
303.4200 308.9100 299.6200 308.0500 1,497,300
320.7700 323.2300 304.3800 306.6600 1,378,700
Weekend
Weekend
311.0500 322.4300 311.0500 312.1700 2,050,800
316.4200 317.6100 309.7300 311.1000 663,600
317.5000 319.2700 312.5800 314.8000 1,077,700
319.6300 326.9600 317.5300 320.4200 1,796,900
311.2200 319.5500 311.2200 318.9100 1,247,500
Weekend
Weekend
319.0000 319.5000 309.9200 313.4100 829,200
320.5300 321.0000 309.6100 317.2300 1,247,300
322.0000 323.7100 317.7500 320.4300 906,600
325.6000 326.1800 317.0300 322.3800 1,169,400
317.2500 323.6800 313.1200 323.5900 1,081,100
Weekend
Weekend
317.7300 321.1700 312.0900 320.6600 996,400
323.6900 328.2800 319.5100 320.5100 1,215,100
13 · 8-K After-hours · 17:17 ET 8-K ↗
319.2000 328.0000 317.2500 327.3000 931,100
321.3700 324.0600 315.2000 318.6500 947,600
329.4100 334.4200 323.1600 325.0700 1,302,300
Weekend
Weekend
331.2400 334.8000 328.3900 332.9200 1,569,800
328.6700 333.4700 322.0000 331.2400 880,300
332.7600 334.4200 325.2400 327.3600 751,700
328.2200 333.0700 324.4800 332.8500 791,600
335.7300 341.3900 326.7600 329.3500 792,000
Weekend
Weekend
336.5800 345.9000 335.8300 336.1900 1,375,300
332.2400 339.6100 326.3300 339.3700 1,152,700
328.8600 335.8000 324.5300 332.6800 1,151,200
316.8000 336.2100 315.6300 332.6100 1,516,400
No trading
Weekend
Weekend
302.5500 318.4400 302.5500 314.4000 1,476,300
314.4200 315.5100 298.0000 308.4800 2,897,400
12 · 10-K Pre-market · 08:12 ET 10-K ↗ 11 · 8-K Pre-market · 08:05 ET 8-K ↗
322.1400 325.0400 317.8000 322.2800 1,582,000
322.6800 325.9800 317.8900 322.9800 1,865,600
325.4900 329.9200 319.2600 320.0000 1,391,900
Weekend
Weekend
331.6100 340.0700 326.5100 328.1600 1,476,700
350.5000 350.5000 327.2700 331.2400 2,620,900
354.0000 355.4900 347.0800 351.9600 1,779,400
338.4900 352.8200 337.5900 351.8000 2,152,900
337.4200 342.3300 333.0000 339.1100 1,911,100
Weekend
Weekend
343.1000 346.5000 336.3900 338.0600 1,648,500
349.3700 350.3400 345.0100 346.7900 1,681,900
353.6600 356.8400 348.0000 349.5800 1,099,000
361.5500 368.0700 354.6900 354.7500 988,100
357.9800 364.0700 352.5000 361.3500 936,400
Weekend
Weekend
368.2000 371.3300 356.7200 357.9800 1,636,800
365.5000 376.8700 363.3600 370.0000 1,875,400
353.0100 366.0000 351.5500 365.4600 1,523,500
350.7000 355.7400 347.7700 355.5300 1,722,600
No trading
Weekend
Weekend
362.2900 367.2000 355.4600 359.2700 1,527,400
368.5400 372.8200 356.8300 359.2600 911,200
369.9500 371.7100 359.9500 366.8600 1,250,000
369.1000 376.8800 366.9200 369.9600 1,625,700
377.8200 378.6100 353.5200 370.9100 3,808,000
10 · 8-K Pre-market · 07:30 ET 8-K ↗
Weekend
Weekend
399.4000 409.5800 392.5600 398.2900 1,440,200
420.1800 425.1900 393.4800 399.4000 1,400,700
405.5100 427.0500 405.5100 422.5000 1,426,100
396.2300 409.1800 384.4200 406.4000 1,612,900
397.5700 400.0000 383.8400 397.8300 1,093,900
Weekend
Weekend
399.3400 407.2200 396.0800 400.1700 730,500
No trading
397.2500 402.4400 397.2500 397.6500 768,900
394.8100 398.4000 393.6400 397.2500 504,800
400.1000 402.7200 397.0500 398.8200 638,400
Weekend
Weekend
404.5800 404.5800 397.3100 400.5900 401,500
No trading
395.9900 401.4700 395.0500 400.6900 408,200
404.7200 407.4300 395.9900 398.7000 792,300
409.6000 413.5900 403.2000 407.7300 1,053,000
Weekend
Weekend
399.1100 408.1500 395.9700 400.2300 12,576,500
394.4900 404.1900 391.5100 396.0400 1,715,000
394.1800 400.2400 389.0000 392.1000 1,041,500
390.6500 399.6400 388.5400 391.1700 1,345,500
394.2200 402.3300 390.0000 391.5000 1,483,300
Weekend
Weekend
408.8600 410.0400 387.0300 397.5500 1,659,000
403.3600 414.2200 402.2200 412.6300 1,284,800
9 · 8-K Pre-market · 07:25 ET 8-K ↗
416.5400 417.0000 403.8000 404.4600 1,188,900
430.4500 433.3100 412.3100 415.2100 1,610,500
447.0000 449.7800 423.4500 430.0200 2,411,600
Weekend
Weekend
468.2900 473.5000 455.3200 458.1200 627,300
472.6700 477.0600 463.0300 465.3400 984,000
8 · 8-K After-hours · 16:49 ET 8-K ↗
466.4900 479.7900 460.4100 473.2900 1,092,900
453.9000 472.4800 453.0100 464.9300 1,204,100
450.0000 462.9300 448.2700 454.5600 1,070,600
Weekend
Weekend
448.1800 455.7600 444.4300 451.2300 563,900
No trading
432.8700 447.6900 430.2700 445.1200 908,200
436.8400 441.8200 428.5700 429.8000 1,009,200
439.4600 444.6700 420.3000 434.2300 1,750,400
Weekend
Weekend
448.2300 449.5300 433.5000 436.3800 1,298,000
463.3200 467.7300 445.3400 445.7900 787,600
462.2700 465.3200 456.9000 460.7600 893,800
458.1500 469.1100 456.2700 462.3000 668,600
449.0000 463.9200 449.0000 460.5400 962,100
Weekend
Weekend
453.8700 461.9600 448.2800 449.1600 968,500
450.6700 456.1400 447.1200 453.9700 798,900
450.6300 459.2700 446.7100 452.7400 937,700
443.5300 455.2000 441.2100 451.9500 981,700
445.0000 449.6800 440.9300 441.7000 739,000
Weekend
Weekend
437.8100 443.6900 430.8400 442.7000 822,600
431.7800 445.5000 429.0000 440.4900 700,500
422.1100 438.5300 417.0000 434.5600 974,500
429.9000 431.5000 421.8300 423.4700 1,170,100
454.5800 457.2600 429.6000 434.0700 1,556,500
Weekend
Weekend
449.0000 459.7700 441.2200 456.0400 1,817,600
450.0000 472.3600 436.5100 449.5600 2,313,900
7 · 10-Q Pre-market · 08:16 ET 10-Q ↗ 6 · 8-K Pre-market · 08:06 ET 8-K ↗
475.1900 482.7300 467.0900 481.5900 1,360,100
476.5000 484.6100 473.2900 475.9100 836,300
465.5600 485.3600 465.5500 478.5800 1,174,500
Weekend
Weekend
468.6800 469.2900 459.3800 463.4300 771,300
464.7100 468.8600 456.9000 464.0000 683,300
477.6600 480.5300 461.2100 464.9000 950,000
488.4200 490.0500 471.4000 474.0000 826,200
476.8200 495.5500 476.8200 491.2200 950,000
Weekend
Weekend
481.6500 492.6200 476.4400 481.6700 1,029,200
474.3900 488.3900 470.4600 481.0700 964,700
469.1900 485.2800 467.5000 470.2700 1,475,400
462.1300 479.6900 457.7300 469.3600 1,435,700
456.1300 473.6500 453.8300 464.9500 1,579,100
Weekend
Weekend
460.2800 460.6000 451.0000 460.4600 937,000
451.0000 459.5700 448.8300 456.9500 1,052,000
464.4600 464.4600 449.7200 450.6800 929,800
456.9400 462.6300 448.9500 459.5800 791,800
458.6900 458.6900 449.9200 452.0000 918,500
Weekend
Weekend
5 · 8-K After-hours · 16:15 ET 8-K ↗
465.0100 465.0100 448.4700 456.3500 969,100
457.6400 461.5300 446.1800 460.9900 1,269,200
456.0000 467.4200 453.3100 460.6500 1,370,000
445.2200 459.3000 445.2200 456.0000 1,379,500
448.0000 451.6300 446.3000 447.4900 719,000
Weekend
Weekend
453.0500 453.0500 442.5100 446.4000 813,000
457.0300 459.0000 446.4200 449.5800 685,300
454.3500 462.6900 450.9700 458.3700 976,000
452.8300 457.4700 450.5000 454.4100 1,024,600
453.5600 462.8800 450.2300 458.9200 971,800
Weekend
Weekend
457.6800 457.6800 450.7200 453.5600 1,713,300
454.0000 456.9400 443.7500 452.1700 1,061,000
455.7600 463.8800 450.7000 451.7300 1,445,600
465.1400 467.2800 457.9900 461.2400 773,300
464.8000 466.2400 454.5100 461.1400 910,100
Weekend
Weekend
4 · 8-K After-hours · 17:17 ET 8-K ↗
468.2900 475.6900 465.4800 465.8900 630,800
474.3400 474.3400 465.1600 468.5800 1,005,300
478.5000 480.0500 461.4700 469.3100 1,817,400
3 · 8-K Pre-market · 07:30 ET 8-K ↗
461.1200 484.2100 455.3000 482.1300 3,217,400
457.3100 463.0000 452.8500 455.0300 926,000
Weekend
Weekend
453.4500 455.2800 444.6600 452.0000 751,500
449.4300 458.3000 447.1100 453.5400 714,300
444.7700 456.1800 442.7300 447.4300 1,301,100
445.8400 454.5000 441.5000 447.0000 1,072,100
No trading
Weekend
Weekend
452.2200 453.9600 444.7900 446.5100 827,600
452.0100 457.2900 451.1200 452.3300 641,000
449.0500 455.4500 447.6300 454.1800 906,700
451.5000 451.5000 444.2500 451.2000 1,183,700
453.3700 458.7500 442.3800 443.6400 1,200,000
Weekend
Weekend
469.1700 469.8100 454.2000 454.3800 1,075,500
459.6200 467.7100 454.6800 467.5500 760,100
459.3400 466.3100 456.0600 458.3100 1,223,500
457.0000 462.8800 450.8800 458.2800 1,322,100
450.0000 457.9200 447.1000 456.8700 1,608,800
Weekend
Weekend
440.6600 449.5200 438.2200 448.9100 713,400
433.5900 443.9800 428.9900 442.7300 1,263,500
428.4300 438.2300 421.8100 432.5200 2,094,400
434.5800 437.0000 428.3000 429.9300 1,507,700
433.6500 445.2000 426.1900 435.0000 988,600
Weekend
Weekend
435.1000 439.3600 427.6600 438.9300 901,300
429.3300 436.7700 425.8100 435.1000 1,152,700
418.7600 428.6900 415.0000 428.1400 1,181,800
416.6400 426.7600 410.4900 418.9100 1,807,600
406.6500 422.6400 398.9100 419.5600 1,455,500
Weekend
Weekend
388.6800 401.8000 382.1900 401.8000 1,781,300
350.0000 402.4300 350.0000 392.2400 3,353,500
2 · 10-Q Pre-market · 08:11 ET 10-Q ↗ 1 · 8-K Pre-market · 08:05 ET 8-K ↗
335.0000 345.9800 333.0300 339.8000 2,058,300
328.9200 331.0600 323.7400 330.5500 862,500
329.0000 331.4300 324.7800 324.7900 1,032,000
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.

18 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
17 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:16 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:04 ET Summarise
15 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
14 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:17 ET Summarise
12 10-K 10-K (opens SEC filing in a new tab) Pre-market · 08:12 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:05 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:30 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:25 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:49 ET Summarise
7 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:16 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:06 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:17 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:30 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 08:11 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:05 ET Summarise