DYN · Dyne Therapeutics, Inc.

Track DYN — free

$25.98 -0.80 (-2.99%) At close · Aug 20

Market Cap

$4.89B

186.75M

Options Chain

Underlying $25.98 · at close Aug 20, 2026 Options Calculator

Positioning

Aug 21, 2026 · expires today · 50 contracts · mixed snapshot sessions · Jul 10, 2026–Aug 20, 2026; 24 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 0d Sep 18 28d Oct 16 56d Dec 18 119d Jan 15 147d Mar 19 210d Dec 17 483d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
0	9	1769.1%	0.961	$15.27		$0.05	—	—	60	0
Call · $10 In the money Snapshot session Jul 29, 2026 Last $15.27 Breakeven $25.27 Implied vol 1769.1% Delta 0.961 ≈96% ITM Gamma 0.005 Theta -1.414 Vega 0.001 Open interest 0 Model this call Put · $10 Snapshot session Aug 3, 2026 Last $0.05 Breakeven $9.95 Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	1608.4%	0.957	—		$0.05	-0.047	1659.7%	68	0
Call · $11 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1608.4% Delta 0.957 ≈96% ITM Gamma 0.006 Theta -1.392 Vega 0.001 Open interest 0 Model this call Put · $11 Snapshot session Aug 3, 2026 Last $0.05 Breakeven $10.95 Implied vol 1659.7% Delta -0.047 ≈5% ITM Gamma 0.006 Theta -1.527 Vega 0.001 Open interest 0 Model this put
0	—	1462.7%	0.952	—		—	-0.052	1511.5%	—	0
Call · $12 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1462.7% Delta 0.952 ≈95% ITM Gamma 0.007 Theta -1.369 Vega 0.001 Open interest 0 Model this call Put · $12 Snapshot session Unknown Last — Breakeven — Implied vol 1511.5% Delta -0.052 ≈5% ITM Gamma 0.007 Theta -1.504 Vega 0.001 Open interest 0 Model this put
0	—	1329.6%	0.947	—		—	-0.057	1376.2%	—	0
Call · $13 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1329.6% Delta 0.947 ≈95% ITM Gamma 0.008 Theta -1.343 Vega 0.001 Open interest 0 Model this call Put · $13 Snapshot session Unknown Last — Breakeven — Implied vol 1376.2% Delta -0.057 ≈6% ITM Gamma 0.008 Theta -1.479 Vega 0.001 Open interest 0 Model this put
0	—	1207%	0.942	—		—	-0.063	1251.7%	—	0
Call · $14 In the money Snapshot session Unknown Last — Breakeven — Implied vol 1207% Delta 0.942 ≈94% ITM Gamma 0.01 Theta -1.315 Vega 0.001 Open interest 0 Model this call Put · $14 Snapshot session Unknown Last — Breakeven — Implied vol 1251.7% Delta -0.063 ≈6% ITM Gamma 0.01 Theta -1.452 Vega 0.001 Open interest 0 Model this put
5	5	1170.6%	0.926	$11.44		—	-0.07	1136.5%	—	0
Call · $15 In the money Snapshot session Aug 20, 2026 Last $11.44 Breakeven $26.44 Implied vol 1170.6% Delta 0.926 ≈93% ITM Gamma 0.012 Theta -1.535 Vega 0.001 Open interest 5 Model this call Put · $15 Snapshot session Unknown Last — Breakeven — Implied vol 1136.5% Delta -0.07 ≈7% ITM Gamma 0.012 Theta -1.424 Vega 0.001 Open interest 0 Model this put
0	—	987.7%	0.929	—		—	-0.077	1029.2%	—	0
Call · $16 In the money Snapshot session Unknown Last — Breakeven — Implied vol 987.7% Delta 0.929 ≈93% ITM Gamma 0.014 Theta -1.257 Vega 0.001 Open interest 0 Model this call Put · $16 Snapshot session Unknown Last — Breakeven — Implied vol 1029.2% Delta -0.077 ≈8% ITM Gamma 0.014 Theta -1.394 Vega 0.001 Open interest 0 Model this put
4	4	888.7%	0.921	$7.32		—	-0.086	928.8%	—	0
Call · $17 In the money Snapshot session Jul 21, 2026 Last $7.32 Breakeven $24.32 Implied vol 888.7% Delta 0.921 ≈92% ITM Gamma 0.017 Theta -1.226 Vega 0.001 Open interest 4 Model this call Put · $17 Snapshot session Unknown Last — Breakeven — Implied vol 928.8% Delta -0.086 ≈9% ITM Gamma 0.017 Theta -1.364 Vega 0.001 Open interest 0 Model this put
8	13	795.7%	0.912	$6.20		—	-0.095	834.6%	—	0
Call · $18 In the money Snapshot session Jul 20, 2026 Last $6.20 Breakeven $24.20 Implied vol 795.7% Delta 0.912 ≈91% ITM Gamma 0.02 Theta -1.194 Vega 0.001 Open interest 8 Model this call Put · $18 Snapshot session Unknown Last — Breakeven — Implied vol 834.6% Delta -0.095 ≈10% ITM Gamma 0.021 Theta -1.333 Vega 0.001 Open interest 0 Model this put
0	—	708%	0.901	—		$0.20	-0.207	1573.9%	6	11
Call · $19 In the money Snapshot session Unknown Last — Breakeven — Implied vol 708% Delta 0.901 ≈90% ITM Gamma 0.025 Theta -1.162 Vega 0.001 Open interest 0 Model this call Put · $19 Snapshot session Jul 24, 2026 Last $0.20 Breakeven $18.80 Implied vol 1573.9% Delta -0.207 ≈21% ITM Gamma 0.018 Theta -4.222 Vega 0.003 Open interest 11 Model this put
12	22	687.7%	0.868	$4.70		$0.05	-0.136	701.4%	2	2k
Call · $20 In the money Snapshot session Jul 20, 2026 Last $4.70 Breakeven $24.70 Implied vol 687.7% Delta 0.868 ≈87% ITM Gamma 0.032 Theta -1.379 Vega 0.002 Open interest 12 Model this call Put · $20 Snapshot session Aug 10, 2026 Last $0.05 Breakeven $19.95 Implied vol 701.4% Delta -0.136 ≈14% ITM Gamma 0.032 Theta -1.431 Vega 0.002 Open interest 2k Model this put
5	6	530.7%	0.873	$5.00		$0.75	-0.158	618.7%	5	185
Call · $21 In the money Snapshot session Aug 18, 2026 Last $5.00 Breakeven $26.00 Implied vol 530.7% Delta 0.873 ≈87% ITM Gamma 0.04 Theta -1.04 Vega 0.002 Open interest 5 Model this call Put · $21 Snapshot session Jul 23, 2026 Last $0.75 Breakeven $20.25 Implied vol 618.7% Delta -0.158 ≈16% ITM Gamma 0.04 Theta -1.396 Vega 0.002 Open interest 185 Model this put
2	1	443.7%	0.852	$4.00		$0.60	-0.175	508.7%	10	45
Call · $22 In the money Snapshot session Aug 7, 2026 Last $4.00 Breakeven $26.00 Implied vol 443.7% Delta 0.852 ≈85% ITM Gamma 0.053 Theta -0.96 Vega 0.002 Open interest 2 Model this call Put · $22 Snapshot session Jul 31, 2026 Last $0.60 Breakeven $21.40 Implied vol 508.7% Delta -0.175 ≈17% ITM Gamma 0.052 Theta -1.23 Vega 0.002 Open interest 45 Model this put
67	10	217.3%	0.931	$2.55		$2.66	-0.189	383.6%	6	33
Call · $23 In the money Snapshot session Jul 21, 2026 Last $2.55 Breakeven $25.55 Implied vol 217.3% Delta 0.931 ≈93% ITM Gamma 0.063 Theta -0.274 Vega 0.002 Open interest 67 Model this call Put · $23 Snapshot session Jul 10, 2026 Last $2.66 Breakeven $20.34 Implied vol 383.6% Delta -0.189 ≈19% ITM Gamma 0.072 Theta -0.975 Vega 0.002 Open interest 33 Model this put
24	2	324.4%	0.749	$2.30		$1.15	-0.252	326.3%	1	1
Call · $24 In the money Snapshot session Aug 20, 2026 Last $2.30 Breakeven $26.30 Implied vol 324.4% Delta 0.749 ≈75% ITM Gamma 0.1 Theta -0.969 Vega 0.003 Open interest 24 Model this call Put · $24 Snapshot session Aug 3, 2026 Last $1.15 Breakeven $22.85 Implied vol 326.3% Delta -0.252 ≈25% ITM Gamma 0.1 Theta -0.974 Vega 0.003 Open interest 1 Model this put
56	2	526.6%	0.608	$1.30		$1.00	-0.396	757.6%	2	31
Call · $25 In the money Snapshot session Aug 20, 2026 Last $1.30 Breakeven $26.30 Implied vol 526.6% Delta 0.608 ≈61% ITM Gamma 0.074 Theta -1.896 Vega 0.004 Open interest 56 Model this call Put · $25 Snapshot session Aug 7, 2026 Last $1.00 Breakeven $24.00 Implied vol 757.6% Delta -0.396 ≈40% ITM Gamma 0.052 Theta -2.737 Vega 0.004 Open interest 31 Model this put
Underlying $25.98
37	7	383.2%	0.517	$2.02		—	-0.487	352.8%	—	0
Call · $26 Snapshot session Aug 20, 2026 Last $2.02 Breakeven $28.02 Implied vol 383.2% Delta 0.517 ≈52% ITM Gamma 0.107 Theta -1.448 Vega 0.004 Open interest 37 Model this call Put · $26 In the money Snapshot session Unknown Last — Breakeven — Implied vol 352.8% Delta -0.487 ≈49% ITM Gamma 0.117 Theta -1.331 Vega 0.004 Open interest 0 Model this put
2	1	215.2%	0.318	$1.20		$1.92	-0.561	459.9%	1	2
Call · $27 Snapshot session Aug 5, 2026 Last $1.20 Breakeven $28.20 Implied vol 215.2% Delta 0.318 ≈32% ITM Gamma 0.169 Theta -0.719 Vega 0.003 Open interest 2 Model this call Put · $27 In the money Snapshot session Aug 18, 2026 Last $1.92 Breakeven $25.08 Implied vol 459.9% Delta -0.561 ≈56% ITM Gamma 0.088 Theta -1.698 Vega 0.004 Open interest 2 Model this put
6	2	300.5%	0.263	$0.55		—	-0.742	295.2%	—	0
Call · $28 Snapshot session Aug 10, 2026 Last $0.55 Breakeven $28.55 Implied vol 300.5% Delta 0.263 ≈26% ITM Gamma 0.112 Theta -0.925 Vega 0.004 Open interest 6 Model this call Put · $28 In the money Snapshot session Unknown Last — Breakeven — Implied vol 295.2% Delta -0.742 ≈74% ITM Gamma 0.113 Theta -0.899 Vega 0.004 Open interest 0 Model this put
1	1	357%	0.221	$0.45		—	—	—	—	0
Call · $29 Snapshot session Aug 6, 2026 Last $0.45 Breakeven $29.45 Implied vol 357% Delta 0.221 ≈22% ITM Gamma 0.085 Theta -0.996 Vega 0.003 Open interest 1 Model this call Put · $29 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
21	20	433%	0.209	$0.40		—	—	—	—	0
Call · $30 Snapshot session Aug 4, 2026 Last $0.40 Breakeven $30.40 Implied vol 433% Delta 0.209 ≈21% ITM Gamma 0.068 Theta -1.163 Vega 0.003 Open interest 21 Model this call Put · $30 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
1	1	489%	0.191	$0.05		—	—	—	—	0
Call · $31 Snapshot session Jul 21, 2026 Last $0.05 Breakeven $31.05 Implied vol 489% Delta 0.191 ≈19% ITM Gamma 0.057 Theta -1.244 Vega 0.003 Open interest 1 Model this call Put · $31 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	526%	0.167	—		—	—	—	—	0
Call · $32 Snapshot session Unknown Last — Breakeven — Implied vol 526% Delta 0.167 ≈17% ITM Gamma 0.049 Theta -1.237 Vega 0.003 Open interest 0 Model this call Put · $32 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	577.9%	0.156	—		—	—	—	—	0
Call · $33 Snapshot session Unknown Last — Breakeven — Implied vol 577.9% Delta 0.156 ≈16% ITM Gamma 0.043 Theta -1.312 Vega 0.002 Open interest 0 Model this call Put · $33 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this put
0	—	—	—	—		—	—	—	—	0
Call · $34 Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $34 In the money Snapshot session Unknown Last — Breakeven — 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 10, 2026–Aug 20, 2026; 24 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.

Key facts CIK 1818794 CUSIP 26818M108 13F (30d) 237 filings 231 filers Visit website Investor relations