NKTR · Nektar Therapeutics

Track NKTR — free

$73.02 -2.90 (-3.82%) At close · Aug 14

Market Cap

$2.49B

34.14M

Options Chain

Underlying $73.02 · at close Aug 14, 2026 Options Calculator

Positioning

Aug 21, 2026 · 5 days to expiry · 80 contracts · mixed snapshot sessions · Dec 18, 2025–Aug 14, 2026; 19 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 5d Sep 18 33d Nov 20 96d Jan 15 152d Feb 19 187d Mar 19 215d Apr 16 243d Jan 21 523d

Calls						Puts
OI	Vol	IV	Δ	Last	Strike	Last	Δ	IV	Vol	OI
55	1	—	—	$83.20		$0.29	—	—	1	2
Call · $20 In the money Snapshot session Apr 20, 2026 Last $83.20 Breakeven $103.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 55 Model this call Put · $20 Snapshot session Jul 15, 2026 Last $0.29 Breakeven $19.71 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this put
2	5	—	—	$44.50		$0.46	—	—	1	4
Call · $25 In the money Snapshot session Feb 12, 2026 Last $44.50 Breakeven $69.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this call Put · $25 Snapshot session Apr 24, 2026 Last $0.46 Breakeven $24.54 Implied vol — Delta — Gamma — Theta — Vega — Open interest 4 Model this put
10	10	—	—	$44.98		$0.15	—	—	1	9
Call · $30 In the money Snapshot session Feb 18, 2026 Last $44.98 Breakeven $74.98 Implied vol — Delta — Gamma — Theta — Vega — Open interest 10 Model this call Put · $30 Snapshot session Jun 4, 2026 Last $0.15 Breakeven $29.85 Implied vol — Delta — Gamma — Theta — Vega — Open interest 9 Model this put
13	1	—	—	$26.34		$1.88	-0.028	355.1%	3	7
Call · $35 In the money Snapshot session Jun 15, 2026 Last $26.34 Breakeven $61.34 Implied vol — Delta — Gamma — Theta — Vega — Open interest 13 Model this call Put · $35 Snapshot session Mar 4, 2026 Last $1.88 Breakeven $33.12 Implied vol 355.1% Delta -0.028 ≈3% ITM Gamma 0.002 Theta -0.187 Vega 0.006 Open interest 7 Model this put
7	6	—	—	$32.42		—	-0.031	331.4%	—	0
Call · $37 In the money Snapshot session Jul 29, 2026 Last $32.42 Breakeven $69.42 Implied vol — Delta — Gamma — Theta — Vega — Open interest 7 Model this call Put · $37 Snapshot session Unknown Last — Breakeven — Implied vol 331.4% Delta -0.031 ≈3% ITM Gamma 0.002 Theta -0.185 Vega 0.006 Open interest 0 Model this put
0	—	—	—	—		—	-0.032	320%	—	0
Call · $38 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $38 Snapshot session Unknown Last — Breakeven — Implied vol 320% Delta -0.032 ≈3% ITM Gamma 0.002 Theta -0.184 Vega 0.007 Open interest 0 Model this put
5	10	—	—	$23.80		—	-0.033	309%	—	0
Call · $39 In the money Snapshot session Jun 25, 2026 Last $23.80 Breakeven $62.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 Model this call Put · $39 Snapshot session Unknown Last — Breakeven — Implied vol 309% Delta -0.033 ≈3% ITM Gamma 0.003 Theta -0.183 Vega 0.007 Open interest 0 Model this put
202	1	—	—	$20.20		$0.48	-0.034	298.2%	1	23
Call · $40 In the money Snapshot session Jun 2, 2026 Last $20.20 Breakeven $60.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 202 Model this call Put · $40 Snapshot session Jun 26, 2026 Last $0.48 Breakeven $39.52 Implied vol 298.2% Delta -0.034 ≈3% ITM Gamma 0.003 Theta -0.182 Vega 0.007 Open interest 23 Model this put
0	—	—	—	—		$0.34	-0.035	287.8%	10	10
Call · $41 In the money Snapshot session Unknown Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest 0 Model this call Put · $41 Snapshot session Jul 2, 2026 Last $0.34 Breakeven $40.66 Implied vol 287.8% Delta -0.035 ≈4% ITM Gamma 0.003 Theta -0.181 Vega 0.007 Open interest 10 Model this put
10	6	—	—	$21.00		$0.92	-0.037	277.6%	2	2
Call · $42 In the money Snapshot session Jun 25, 2026 Last $21.00 Breakeven $63.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 10 Model this call Put · $42 Snapshot session Apr 28, 2026 Last $0.92 Breakeven $41.08 Implied vol 277.6% Delta -0.037 ≈4% ITM Gamma 0.003 Theta -0.18 Vega 0.007 Open interest 2 Model this put
11	16	—	—	$20.20		$11.10	-0.038	267.6%	4	0
Call · $43 In the money Snapshot session Jun 25, 2026 Last $20.20 Breakeven $63.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 11 Model this call Put · $43 Snapshot session Dec 18, 2025 Last $11.10 Breakeven $31.90 Implied vol 267.6% Delta -0.038 ≈4% ITM Gamma 0.003 Theta -0.179 Vega 0.007 Open interest 0 Model this put
13	12	—	—	$19.40		—	-0.039	257.9%	—	0
Call · $44 In the money Snapshot session Jun 25, 2026 Last $19.40 Breakeven $63.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 13 Model this call Put · $44 Snapshot session Unknown Last — Breakeven — Implied vol 257.9% Delta -0.039 ≈4% ITM Gamma 0.004 Theta -0.178 Vega 0.007 Open interest 0 Model this put
1	1	—	—	$20.72		$0.17	-0.03	227.4%	2	66
Call · $45 In the money Snapshot session May 27, 2026 Last $20.72 Breakeven $65.72 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $45 Snapshot session Jul 21, 2026 Last $0.17 Breakeven $44.83 Implied vol 227.4% Delta -0.03 ≈3% ITM Gamma 0.003 Theta -0.126 Vega 0.007 Open interest 66 Model this put
12	13	—	—	$17.80		$3.20	-0.042	239.1%	1	1
Call · $46 In the money Snapshot session Jun 25, 2026 Last $17.80 Breakeven $63.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 Model this call Put · $46 Snapshot session Mar 16, 2026 Last $3.20 Breakeven $42.80 Implied vol 239.1% Delta -0.042 ≈4% ITM Gamma 0.004 Theta -0.176 Vega 0.007 Open interest 1 Model this put
2	4	—	—	$16.80		$0.30	-0.044	230.1%	1	35
Call · $47 In the money Snapshot session Jun 25, 2026 Last $16.80 Breakeven $63.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this call Put · $47 Snapshot session Jul 21, 2026 Last $0.30 Breakeven $46.70 Implied vol 230.1% Delta -0.044 ≈4% ITM Gamma 0.005 Theta -0.175 Vega 0.007 Open interest 35 Model this put
2	1	—	—	$13.98		$0.91	-0.046	221.2%	1	1
Call · $48 In the money Snapshot session Jun 2, 2026 Last $13.98 Breakeven $61.98 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 Model this call Put · $48 Snapshot session Jul 14, 2026 Last $0.91 Breakeven $47.09 Implied vol 221.2% Delta -0.046 ≈5% ITM Gamma 0.005 Theta -0.174 Vega 0.007 Open interest 1 Model this put
1	2	—	—	$22.70		$2.00	-0.048	212.6%	2	2
Call · $49 In the money Snapshot session Jun 30, 2026 Last $22.70 Breakeven $71.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 Model this call Put · $49 Snapshot session Apr 15, 2026 Last $2.00 Breakeven $47.00 Implied vol 212.6% Delta -0.048 ≈5% ITM Gamma 0.005 Theta -0.172 Vega 0.007 Open interest 2 Model this put
80	1	142%	0.989	$25.75		$0.29	-0.05	204.1%	1	465
Call · $50 In the money Snapshot session Aug 13, 2026 Last $25.75 Breakeven $75.75 Implied vol 142% Delta 0.989 ≈99% ITM Gamma 0.002 Theta -0.038 Vega 0.004 Open interest 80 Model this call Put · $50 Snapshot session Jul 24, 2026 Last $0.29 Breakeven $49.71 Implied vol 204.1% Delta -0.05 ≈5% ITM Gamma 0.006 Theta -0.171 Vega 0.008 Open interest 465 Model this put
15	1	—	—	$17.45		$0.13	-0.068	166.5%	3	153
Call · $55 In the money Snapshot session Aug 4, 2026 Last $17.45 Breakeven $72.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 15 Model this call Put · $55 Snapshot session Aug 14, 2026 Last $0.13 Breakeven $54.87 Implied vol 166.5% Delta -0.068 ≈7% ITM Gamma 0.009 Theta -0.178 Vega 0.014 Open interest 153 Model this put
275	40	0.1%	1	$17.00		$0.06	-0.053	103.9%	56	2k
Call · $60 In the money Snapshot session Aug 13, 2026 Last $17.00 Breakeven $77.00 Implied vol 0.1% Delta 1 ≈100% ITM Gamma 0 Theta -0.006 Vega 0 Open interest 275 Model this call Put · $60 Snapshot session Aug 14, 2026 Last $0.06 Breakeven $59.94 Implied vol 103.9% Delta -0.053 ≈5% ITM Gamma 0.012 Theta -0.092 Vega 0.008 Open interest 2k Model this put
81	2	69.9%	0.919	$11.75		$0.18	-0.101	77%	2	855
Call · $65 In the money Snapshot session Aug 13, 2026 Last $11.75 Breakeven $76.75 Implied vol 69.9% Delta 0.919 ≈92% ITM Gamma 0.024 Theta -0.091 Vega 0.015 Open interest 81 Model this call Put · $65 Snapshot session Aug 14, 2026 Last $0.18 Breakeven $64.82 Implied vol 77% Delta -0.101 ≈10% ITM Gamma 0.026 Theta -0.11 Vega 0.015 Open interest 855 Model this put
805	5	54.2%	0.75	$5.53		$0.95	-0.255	55.3%	160	407
Call · $70 In the money Snapshot session Aug 14, 2026 Last $5.53 Breakeven $75.53 Implied vol 54.2% Delta 0.75 ≈75% ITM Gamma 0.066 Theta -0.146 Vega 0.03 Open interest 805 Model this call Put · $70 Snapshot session Aug 14, 2026 Last $0.95 Breakeven $69.05 Implied vol 55.3% Delta -0.255 ≈25% ITM Gamma 0.065 Theta -0.143 Vega 0.03 Open interest 407 Model this put
Underlying $73.02
707	143	69.2%	0.395	$1.70		$2.15	-0.598	72.9%	28	230
Call · $75 Snapshot session Aug 14, 2026 Last $1.70 Breakeven $76.70 Implied vol 69.2% Delta 0.395 ≈40% ITM Gamma 0.063 Theta -0.222 Vega 0.036 Open interest 707 Model this call Put · $75 In the money Snapshot session Aug 13, 2026 Last $2.15 Breakeven $72.85 Implied vol 72.9% Delta -0.598 ≈60% ITM Gamma 0.06 Theta -0.227 Vega 0.036 Open interest 230 Model this put
3.7k	2k	76.1%	0.179	$0.50		$7.40	-0.814	78.3%	21	126
Call · $80 Snapshot session Aug 14, 2026 Last $0.50 Breakeven $80.50 Implied vol 76.1% Delta 0.179 ≈18% ITM Gamma 0.038 Theta -0.163 Vega 0.025 Open interest 3.7k Model this call Put · $80 In the money Snapshot session Aug 14, 2026 Last $7.40 Breakeven $72.60 Implied vol 78.3% Delta -0.814 ≈81% ITM Gamma 0.038 Theta -0.165 Vega 0.025 Open interest 126 Model this put
2.4k	88	81.6%	0.071	$0.23		$16.75	-0.949	74.1%	1	17
Call · $85 Snapshot session Aug 14, 2026 Last $0.23 Breakeven $85.23 Implied vol 81.6% Delta 0.071 ≈7% ITM Gamma 0.019 Theta -0.091 Vega 0.01 Open interest 2.4k Model this call Put · $85 In the money Snapshot session Aug 3, 2026 Last $16.75 Breakeven $68.25 Implied vol 74.1% Delta -0.949 ≈95% ITM Gamma 0.016 Theta -0.058 Vega 0.01 Open interest 17 Model this put
1.1k	236	103.4%	0.058	$0.15		$22.60	-0.923	115.8%	2	43
Call · $90 Snapshot session Aug 14, 2026 Last $0.15 Breakeven $90.15 Implied vol 103.4% Delta 0.058 ≈6% ITM Gamma 0.012 Theta -0.097 Vega 0.01 Open interest 1.1k Model this call Put · $90 In the money Snapshot session Jul 21, 2026 Last $22.60 Breakeven $67.40 Implied vol 115.8% Delta -0.923 ≈92% ITM Gamma 0.014 Theta -0.132 Vega 0.016 Open interest 43 Model this put
258	17	107.8%	0.027	$0.05		$21.00	-0.956	121.8%	8	1
Call · $95 Snapshot session Aug 14, 2026 Last $0.05 Breakeven $95.05 Implied vol 107.8% Delta 0.027 ≈3% ITM Gamma 0.006 Theta -0.055 Vega 0.005 Open interest 258 Model this call Put · $95 In the money Snapshot session May 11, 2026 Last $21.00 Breakeven $74.00 Implied vol 121.8% Delta -0.956 ≈96% ITM Gamma 0.009 Theta -0.087 Vega 0.01 Open interest 1 Model this put
910	6	141.2%	0.041	$0.10		$41.50	-0.969	134%	1	1
Call · $100 Snapshot session Aug 14, 2026 Last $0.10 Breakeven $100.10 Implied vol 141.2% Delta 0.041 ≈4% ITM Gamma 0.007 Theta -0.101 Vega 0.011 Open interest 910 Model this call Put · $100 In the money Snapshot session Jun 4, 2026 Last $41.50 Breakeven $58.50 Implied vol 134% Delta -0.969 ≈97% ITM Gamma 0.006 Theta -0.072 Vega 0.005 Open interest 1 Model this put
326	1	180.2%	0.064	$0.10		—	-0.991	125.6%	—	0
Call · $105 Snapshot session Aug 13, 2026 Last $0.10 Breakeven $105.10 Implied vol 180.2% Delta 0.064 ≈6% ITM Gamma 0.008 Theta -0.183 Vega 0.011 Open interest 326 Model this call Put · $105 In the money Snapshot session Unknown Last — Breakeven — Implied vol 125.6% Delta -0.991 ≈99% ITM Gamma 0.003 Theta -0.02 Vega 0.002 Open interest 0 Model this put
618	2	204.2%	0.067	$0.05		$18.18	-0.954	187.1%	16	0
Call · $110 Snapshot session Aug 7, 2026 Last $0.05 Breakeven $110.05 Implied vol 204.2% Delta 0.067 ≈7% ITM Gamma 0.007 Theta -0.214 Vega 0.011 Open interest 618 Model this call Put · $110 In the money Snapshot session Apr 20, 2026 Last $18.18 Breakeven $91.82 Implied vol 187.1% Delta -0.954 ≈95% ITM Gamma 0.006 Theta -0.139 Vega 0.011 Open interest 0 Model this put
18	1	263.8%	0.108	$0.05		—	-0.963	197.8%	—	0
Call · $115 Snapshot session Aug 6, 2026 Last $0.05 Breakeven $115.05 Implied vol 263.8% Delta 0.108 ≈11% ITM Gamma 0.008 Theta -0.398 Vega 0.02 Open interest 18 Model this call Put · $115 In the money Snapshot session Unknown Last — Breakeven — Implied vol 197.8% Delta -0.963 ≈96% ITM Gamma 0.005 Theta -0.125 Vega 0.006 Open interest 0 Model this put
456	10	234.2%	0.057	$0.05		—	-0.965	211.5%	—	0
Call · $120 Snapshot session Aug 7, 2026 Last $0.05 Breakeven $120.05 Implied vol 234.2% Delta 0.057 ≈6% ITM Gamma 0.005 Theta -0.217 Vega 0.012 Open interest 456 Model this call Put · $120 In the money Snapshot session Unknown Last — Breakeven — Implied vol 211.5% Delta -0.965 ≈96% ITM Gamma 0.004 Theta -0.127 Vega 0.006 Open interest 0 Model this put
212	200	245.2%	0.05	$0.56		—	-0.972	216.2%	—	0
Call · $125 Snapshot session May 21, 2026 Last $0.56 Breakeven $125.56 Implied vol 245.2% Delta 0.05 ≈5% ITM Gamma 0.005 Theta -0.206 Vega 0.012 Open interest 212 Model this call Put · $125 In the money Snapshot session Unknown Last — Breakeven — Implied vol 216.2% Delta -0.972 ≈97% ITM Gamma 0.003 Theta -0.105 Vega 0.006 Open interest 0 Model this put
3	3	259.9%	0.048	$0.75		—	-0.968	237.4%	—	0
Call · $130 Snapshot session Jul 17, 2026 Last $0.75 Breakeven $130.75 Implied vol 259.9% Delta 0.048 ≈5% ITM Gamma 0.004 Theta -0.212 Vega 0.012 Open interest 3 Model this call Put · $130 In the money Snapshot session Unknown Last — Breakeven — Implied vol 237.4% Delta -0.968 ≈97% ITM Gamma 0.003 Theta -0.131 Vega 0.006 Open interest 0 Model this put
0	—	274%	0.046	—		—	-0.964	257.8%	—	0
Call · $135 Snapshot session Unknown Last — Breakeven — Implied vol 274% Delta 0.046 ≈5% ITM Gamma 0.004 Theta -0.217 Vega 0.012 Open interest 0 Model this call Put · $135 In the money Snapshot session Unknown Last — Breakeven — Implied vol 257.8% Delta -0.964 ≈96% ITM Gamma 0.003 Theta -0.156 Vega 0.006 Open interest 0 Model this put
12	12	287.2%	0.045	$5.75		—	-0.975	253.2%	—	0
Call · $140 Snapshot session Apr 21, 2026 Last $5.75 Breakeven $145.75 Implied vol 287.2% Delta 0.045 ≈4% ITM Gamma 0.004 Theta -0.222 Vega 0.006 Open interest 12 Model this call Put · $140 In the money Snapshot session Unknown Last — Breakeven — Implied vol 253.2% Delta -0.975 ≈98% ITM Gamma 0.003 Theta -0.111 Vega 0.006 Open interest 0 Model this put
0	—	298%	0.043	—		—	-0.976	264.7%	—	0
Call · $145 Snapshot session Unknown Last — Breakeven — Implied vol 298% Delta 0.043 ≈4% ITM Gamma 0.003 Theta -0.224 Vega 0.006 Open interest 0 Model this call Put · $145 In the money Snapshot session Unknown Last — Breakeven — Implied vol 264.7% Delta -0.976 ≈98% ITM Gamma 0.002 Theta -0.113 Vega 0.006 Open interest 0 Model this put
2	2	304.6%	0.04	$1.46		$84.00	-0.987	251.3%	1	0
Call · $150 Snapshot session Apr 23, 2026 Last $1.46 Breakeven $151.46 Implied vol 304.6% Delta 0.04 ≈4% ITM Gamma 0.003 Theta -0.214 Vega 0.007 Open interest 2 Model this call Put · $150 In the money Snapshot session Jul 2, 2026 Last $84.00 Breakeven $66.00 Implied vol 251.3% Delta -0.987 ≈99% ITM Gamma 0.002 Theta -0.06 Vega 0.003 Open interest 0 Model this put
0	—	318.6%	0.041	—		—	-0.977	286.5%	—	0
Call · $155 Snapshot session Unknown Last — Breakeven — Implied vol 318.6% Delta 0.041 ≈4% ITM Gamma 0.003 Theta -0.228 Vega 0.007 Open interest 0 Model this call Put · $155 In the money Snapshot session Unknown Last — Breakeven — Implied vol 286.5% Delta -0.977 ≈98% ITM Gamma 0.002 Theta -0.117 Vega 0.006 Open interest 0 Model this put
1k	244	324.7%	0.038	$0.05		—	-0.973	304.6%	—	0
Call · $160 Snapshot session Jun 29, 2026 Last $0.05 Breakeven $160.05 Implied vol 324.7% Delta 0.038 ≈4% ITM Gamma 0.003 Theta -0.218 Vega 0.007 Open interest 1k Model this call Put · $160 In the money Snapshot session Unknown Last — Breakeven — Implied vol 304.6% Delta -0.973 ≈97% ITM Gamma 0.002 Theta -0.143 Vega 0.007 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 · Dec 18, 2025–Aug 14, 2026; 19 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 25 strikes around the money are shown by default — switch to "All 40" for the wings.

Key facts CIK 906709 CUSIP 640268306 13F (30d) 249 filings 234 filers Visit website Investor relations