ALNY · Alnylam Pharmaceuticals, Inc.

Track ALNY — free

$228.65 +1.53 (+0.67%) At close · Aug 14

Market Cap

$30.60B

133.81M

Options Chain

Underlying $228.65 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 4 days to expiry · 64 contracts · mixed snapshot sessions · Jul 1, 2026–Aug 14, 2026; 8 unknown

Put / call OI

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dated and unknown snapshot sessions

Open interest

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dated and unknown snapshot sessions

Volume

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dated and unknown snapshot sessions

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Aug 21 4d Sep 18 32d Dec 18 123d Jan 15 151d Mar 19 214d Dec 17 487d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	1	173.5%	0.94	$59.00		$0.10	-0.023	131.9%	1	68
Call · $170 In the money Snapshot session Aug 5, 2026 Last $59.00 Breakeven $229.00 Implied vol 173.5% Delta 0.94 ≈94% ITM Gamma 0.003 Theta -0.575 Vega 0.04 Open interest 0 Model this call Put · $170 Snapshot session Aug 11, 2026 Last $0.10 Breakeven $169.90 Implied vol 131.9% Delta -0.023 ≈2% ITM Gamma 0.002 Theta -0.194 Vega 0.012 Open interest 68 Model this put
1	1	160%	0.934	$34.00		$0.26	-0.021	114.7%	1	20
Call · $175 In the money Snapshot session Jul 31, 2026 Last $34.00 Breakeven $209.00 Implied vol 160% Delta 0.934 ≈93% ITM Gamma 0.003 Theta -0.57 Vega 0.041 Open interest 1 Model this call Put · $175 Snapshot session Aug 14, 2026 Last $0.26 Breakeven $174.74 Implied vol 114.7% Delta -0.021 ≈2% ITM Gamma 0.002 Theta -0.153 Vega 0.012 Open interest 20 Model this put
22	1	148.2%	0.925	$44.70		$0.20	-0.047	125.5%	1	126
Call · $180 In the money Snapshot session Aug 14, 2026 Last $44.70 Breakeven $224.70 Implied vol 148.2% Delta 0.925 ≈92% ITM Gamma 0.004 Theta -0.579 Vega 0.041 Open interest 22 Model this call Put · $180 Snapshot session Aug 12, 2026 Last $0.20 Breakeven $179.80 Implied vol 125.5% Delta -0.047 ≈5% ITM Gamma 0.003 Theta -0.33 Vega 0.024 Open interest 126 Model this put
1	1	136.7%	0.915	$82.50		$1.27	-0.091	140.9%	1	93
Call · $185 In the money Snapshot session Jul 24, 2026 Last $82.50 Breakeven $267.50 Implied vol 136.7% Delta 0.915 ≈91% ITM Gamma 0.004 Theta -0.588 Vega 0.042 Open interest 1 Model this call Put · $185 Snapshot session Aug 14, 2026 Last $1.27 Breakeven $183.73 Implied vol 140.9% Delta -0.091 ≈9% ITM Gamma 0.004 Theta -0.618 Vega 0.042 Open interest 93 Model this put
1	1	124.4%	0.904	$38.50		$0.40	-0.102	128.6%	109	204
Call · $190 In the money Snapshot session Aug 14, 2026 Last $38.50 Breakeven $228.50 Implied vol 124.4% Delta 0.904 ≈90% ITM Gamma 0.005 Theta -0.584 Vega 0.042 Open interest 1 Model this call Put · $190 Snapshot session Aug 11, 2026 Last $0.40 Breakeven $189.60 Implied vol 128.6% Delta -0.102 ≈10% ITM Gamma 0.005 Theta -0.613 Vega 0.042 Open interest 204 Model this put
4	1	108.9%	0.898	$26.00		$0.20	-0.099	107.3%	3	77
Call · $195 In the money Snapshot session Aug 3, 2026 Last $26.00 Breakeven $221.00 Implied vol 108.9% Delta 0.898 ≈90% ITM Gamma 0.006 Theta -0.538 Vega 0.043 Open interest 4 Model this call Put · $195 Snapshot session Aug 14, 2026 Last $0.20 Breakeven $194.80 Implied vol 107.3% Delta -0.099 ≈10% ITM Gamma 0.006 Theta -0.501 Vega 0.043 Open interest 77 Model this put
184	1	96.1%	0.886	$20.10		$0.35	-0.046	66.5%	12	407
Call · $200 In the money Snapshot session Aug 4, 2026 Last $20.10 Breakeven $220.10 Implied vol 96.1% Delta 0.886 ≈89% ITM Gamma 0.008 Theta -0.52 Vega 0.044 Open interest 184 Model this call Put · $200 Snapshot session Aug 14, 2026 Last $0.35 Breakeven $199.65 Implied vol 66.5% Delta -0.046 ≈5% ITM Gamma 0.005 Theta -0.17 Vega 0.025 Open interest 407 Model this put
131	2	70.3%	0.841	$16.50		$0.50	-0.073	47.6%	105	110
Call · $210 In the money Snapshot session Aug 13, 2026 Last $16.50 Breakeven $226.50 Implied vol 70.3% Delta 0.841 ≈84% ITM Gamma 0.013 Theta -0.473 Vega 0.067 Open interest 131 Model this call Put · $210 Snapshot session Aug 14, 2026 Last $0.50 Breakeven $209.50 Implied vol 47.6% Delta -0.073 ≈7% ITM Gamma 0.011 Theta -0.176 Vega 0.044 Open interest 110 Model this put
240	2	54.1%	0.705	$9.66		$1.70	-0.247	41.7%	14	267
Call · $220 In the money Snapshot session Aug 14, 2026 Last $9.66 Breakeven $229.66 Implied vol 54.1% Delta 0.705 ≈71% ITM Gamma 0.024 Theta -0.517 Vega 0.09 Open interest 240 Model this call Put · $220 Snapshot session Aug 14, 2026 Last $1.70 Breakeven $218.30 Implied vol 41.7% Delta -0.247 ≈25% ITM Gamma 0.029 Theta -0.349 Vega 0.09 Open interest 267 Model this put
Underlying $228.65
504	13	41.1%	0.407	$4.10		$6.00	-0.614	34.9%	5	45
Call · $230 Snapshot session Aug 14, 2026 Last $4.10 Breakeven $234.10 Implied vol 41.1% Delta 0.407 ≈41% ITM Gamma 0.036 Theta -0.439 Vega 0.106 Open interest 504 Model this call Put · $230 In the money Snapshot session Aug 14, 2026 Last $6.00 Breakeven $224.00 Implied vol 34.9% Delta -0.614 ≈61% ITM Gamma 0.042 Theta -0.349 Vega 0.106 Open interest 45 Model this put
555	45	43.3%	0.14	$0.95		$19.40	—	—	1	183
Call · $240 Snapshot session Aug 14, 2026 Last $0.95 Breakeven $240.95 Implied vol 43.3% Delta 0.14 ≈14% ITM Gamma 0.02 Theta -0.265 Vega 0.049 Open interest 555 Model this call Put · $240 In the money Snapshot session Aug 12, 2026 Last $19.40 Breakeven $220.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 183 Model this put
550	13	57.9%	0.08	$0.35		$29.35	—	—	1	723
Call · $250 Snapshot session Aug 14, 2026 Last $0.35 Breakeven $250.35 Implied vol 57.9% Delta 0.08 ≈8% ITM Gamma 0.01 Theta -0.234 Vega 0.05 Open interest 550 Model this call Put · $250 In the money Snapshot session Aug 12, 2026 Last $29.35 Breakeven $220.65 Implied vol — Delta — Gamma — Theta — Vega — Open interest 723 Model this put
227	219	72.3%	0.059	$0.85		$44.65	—	—	2	50
Call · $260 Snapshot session Aug 6, 2026 Last $0.85 Breakeven $260.85 Implied vol 72.3% Delta 0.059 ≈6% ITM Gamma 0.006 Theta -0.227 Vega 0.029 Open interest 227 Model this call Put · $260 In the money Snapshot session Aug 7, 2026 Last $44.65 Breakeven $215.35 Implied vol — Delta — Gamma — Theta — Vega — Open interest 50 Model this put
54	48	84.3%	0.042	$0.47		$56.38	—	—	2	23
Call · $270 Snapshot session Aug 5, 2026 Last $0.47 Breakeven $270.47 Implied vol 84.3% Delta 0.042 ≈4% ITM Gamma 0.004 Theta -0.202 Vega 0.03 Open interest 54 Model this call Put · $270 In the money Snapshot session Aug 7, 2026 Last $56.38 Breakeven $213.62 Implied vol — Delta — Gamma — Theta — Vega — Open interest 23 Model this put
304	5	90%	0.025	$0.15		$52.52	—	—	100	100
Call · $280 Snapshot session Aug 14, 2026 Last $0.15 Breakeven $280.15 Implied vol 90% Delta 0.025 ≈3% ITM Gamma 0.002 Theta -0.141 Vega 0.015 Open interest 304 Model this call Put · $280 In the money Snapshot session Aug 14, 2026 Last $52.52 Breakeven $227.48 Implied vol — Delta — Gamma — Theta — Vega — Open interest 100 Model this put
94	2	146%	0.085	$0.22		$60.90	—	—	1	0
Call · $290 Snapshot session Aug 13, 2026 Last $0.22 Breakeven $290.22 Implied vol 146% Delta 0.085 ≈9% ITM Gamma 0.004 Theta -0.615 Vega 0.053 Open interest 94 Model this call Put · $290 In the money Snapshot session Aug 5, 2026 Last $60.90 Breakeven $229.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1.2k	3	120.7%	0.027	$0.10		$79.00	—	—	6	25
Call · $300 Snapshot session Aug 14, 2026 Last $0.10 Breakeven $300.10 Implied vol 120.7% Delta 0.027 ≈3% ITM Gamma 0.002 Theta -0.202 Vega 0.016 Open interest 1.2k Model this call Put · $300 In the money Snapshot session Aug 14, 2026 Last $79.00 Breakeven $221.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 25 Model this put
54	1	183.1%	0.084	$0.10		$97.50	—	—	1	0
Call · $310 Snapshot session Aug 14, 2026 Last $0.10 Breakeven $310.10 Implied vol 183.1% Delta 0.084 ≈8% ITM Gamma 0.003 Theta -0.768 Vega 0.054 Open interest 54 Model this call Put · $310 In the money Snapshot session Aug 3, 2026 Last $97.50 Breakeven $212.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
74	5	129.9%	0.013	$0.05		$103.85	—	—	36	18
Call · $320 Snapshot session Aug 11, 2026 Last $0.05 Breakeven $320.05 Implied vol 129.9% Delta 0.013 ≈1% ITM Gamma 0.001 Theta -0.115 Vega 0.007 Open interest 74 Model this call Put · $320 In the money Snapshot session Aug 6, 2026 Last $103.85 Breakeven $216.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 18 Model this put
488	6	197.7%	0.065	$0.04		$123.92	—	—	4	0
Call · $330 Snapshot session Aug 7, 2026 Last $0.04 Breakeven $330.04 Implied vol 197.7% Delta 0.065 ≈7% ITM Gamma 0.002 Theta -0.673 Vega 0.033 Open interest 488 Model this call Put · $330 In the money Snapshot session Jul 30, 2026 Last $123.92 Breakeven $206.08 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
425	4	158.4%	0.016	$0.10		$134.89	—	—	2	0
Call · $340 Snapshot session Aug 12, 2026 Last $0.10 Breakeven $340.10 Implied vol 158.4% Delta 0.016 ≈2% ITM Gamma 0.001 Theta -0.168 Vega 0.017 Open interest 425 Model this call Put · $340 In the money Snapshot session Jul 30, 2026 Last $134.89 Breakeven $205.11 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
214	1	164.2%	0.014	$0.22		$144.89	—	—	15	0
Call · $350 Snapshot session Aug 3, 2026 Last $0.22 Breakeven $350.22 Implied vol 164.2% Delta 0.014 ≈1% ITM Gamma 0.001 Theta -0.153 Vega 0.007 Open interest 214 Model this call Put · $350 In the money Snapshot session Jul 30, 2026 Last $144.89 Breakeven $205.11 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
26	6	219.5%	0.044	$0.01		$153.87	—	—	9	0
Call · $360 Snapshot session Jul 30, 2026 Last $0.01 Breakeven $360.01 Implied vol 219.5% Delta 0.044 ≈4% ITM Gamma 0.002 Theta -0.551 Vega 0.034 Open interest 26 Model this call Put · $360 In the money Snapshot session Jul 30, 2026 Last $153.87 Breakeven $206.13 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
25	10	230.5%	0.043	$0.85		$154.50	—	—	1	0
Call · $370 Snapshot session Jul 28, 2026 Last $0.85 Breakeven $370.85 Implied vol 230.5% Delta 0.043 ≈4% ITM Gamma 0.001 Theta -0.564 Vega 0.034 Open interest 25 Model this call Put · $370 In the money Snapshot session Aug 6, 2026 Last $154.50 Breakeven $215.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
2	1	265.6%	0.065	$1.00		—	—	—	—	0
Call · $380 Snapshot session Jul 13, 2026 Last $1.00 Breakeven $381.00 Implied vol 265.6% Delta 0.065 ≈7% ITM Gamma 0.002 Theta -0.9 Vega 0.035 Open interest 2 Model this call Put · $380 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
3	1	242.2%	0.036	$1.77		—	—	—	—	0
Call · $390 Snapshot session Jul 10, 2026 Last $1.77 Breakeven $391.77 Implied vol 242.2% Delta 0.036 ≈4% ITM Gamma 0.001 Theta -0.514 Vega 0.018 Open interest 3 Model this call Put · $390 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
200	2	260.5%	0.04	$0.01		—	—	—	—	0
Call · $400 Snapshot session Aug 11, 2026 Last $0.01 Breakeven $400.01 Implied vol 260.5% Delta 0.04 ≈4% ITM Gamma 0.001 Theta -0.609 Vega 0.018 Open interest 200 Model this call Put · $400 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
3	1	259%	0.034	$0.10		—	—	—	—	0
Call · $410 Snapshot session Jul 22, 2026 Last $0.10 Breakeven $410.10 Implied vol 259% Delta 0.034 ≈3% ITM Gamma 0.001 Theta -0.522 Vega 0.018 Open interest 3 Model this call Put · $410 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
63	64	267.1%	0.033	$7.00		$113.50	—	—	2	0
Call · $420 Snapshot session Jul 9, 2026 Last $7.00 Breakeven $427.00 Implied vol 267.1% Delta 0.033 ≈3% ITM Gamma 0.001 Theta -0.526 Vega 0.018 Open interest 63 Model this call Put · $420 In the money Snapshot session Jul 1, 2026 Last $113.50 Breakeven $306.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	275%	0.032	—		—	—	—	—	0
Call · $430 Snapshot session Unknown Last — Breakeven — Implied vol 275% Delta 0.032 ≈3% ITM Gamma 0.001 Theta -0.531 Vega 0.018 Open interest 0 Model this call Put · $430 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	282.8%	0.032	—		$120.50	—	—	1	0
Call · $440 Snapshot session Unknown Last — Breakeven — Implied vol 282.8% Delta 0.032 ≈3% ITM Gamma 0.001 Theta -0.535 Vega 0.019 Open interest 0 Model this call Put · $440 In the money Snapshot session Jul 10, 2026 Last $120.50 Breakeven $319.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	290.4%	0.031	—		$130.50	—	—	1	0
Call · $450 Snapshot session Unknown Last — Breakeven — Implied vol 290.4% Delta 0.031 ≈3% ITM Gamma 0.001 Theta -0.539 Vega 0.019 Open interest 0 Model this call Put · $450 In the money Snapshot session Jul 10, 2026 Last $130.50 Breakeven $319.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put

About this data

Each contract's last price, volume, greeks, implied volatility and open interest belongs to the snapshot session shown in its details; unknown means the provider omitted the timestamp. This chain has mixed snapshot sessions · Jul 1, 2026–Aug 14, 2026; 8 unknown. Cross-contract positioning totals are shown only when every returned row has the same known session. Bid and ask are not included on this plan.

In-the-money strikes are tinted, deepening toward the money, and the bar beside each open-interest figure scales to the heaviest strike shown. The 22 strikes around the money are shown by default — switch to "All 32" for the wings.

Key facts CIK 1178670 CUSIP 02043Q107 13F (30d) 732 filings 698 filers Visit website Investor relations