ALG · Alamo Group Inc · Options Chain

Track ALG — free

$169.08 +1.80 (+1.08%) At close · Sep 11

S&P 600 member Russell 2000 member Rebalance outlook locked

Market Cap

$2.06B

12.17M

Options Chain

Underlying $169.08 · at close Sep 11, 2026 Options Calculator

Pull option chains with greeks and open interest through the options chain API or MCP →

Positioning

Sep 18, 2026 · 5 days to expiry · 58 contracts · mixed daily-bar sessions · Jan 20, 2026–Sep 8, 2026; 31 unknown

Put / call OI

0.35

Call-heavy positioning

Open interest

182

as of Sep 10, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$140.00

$29.08 below spot

ATM implied vol

35.6%

market's expected move

Open interest by strike · near the money

Calls Puts

100

105

110

115

120

125

130

135

140

145

150

155

160

165

170

175

180

185

190

195

200

210

220

230

240

250

260

270

280

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 5d Oct 16 33d Dec 18 96d Mar 19 187d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
—	—	—	—	$67.00	$70.80	—		$0.55	$0.00	$4.80	—	—	16	23
Call · $100 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:58.799 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $100 Daily-bar session May 11, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $0.55 Breakeven $99.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 23 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$62.00	$65.70	—		—	$0.00	$4.80	—	—	—	—
Call · $105 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:58.827 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $105 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.187 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$57.00	$60.70	—		$0.50	$0.00	$4.80	—	—	1	1
Call · $110 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:58.799 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $110 Daily-bar session Jun 17, 2026 Quote as of 2026-09-11 13:35:46.187 UTC Last $0.50 Breakeven $109.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$52.00	$55.70	—		—	$0.00	$4.80	—	—	—	—
Call · $115 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:58.827 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $115 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$47.00	$50.80	—		—	$0.00	$4.80	—	—	—	—
Call · $120 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:58.799 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $120 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.187 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$42.00	$45.90	—		$3.14	$0.00	$4.80	—	—	1	7
Call · $125 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:45.799 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $125 Daily-bar session May 18, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $3.14 Breakeven $121.86 Implied vol — Delta — Gamma — Theta — Vega — Open interest 7 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$37.00	$40.70	—		$0.20	$0.00	$4.80	—	—	3	2
Call · $130 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:45.799 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $130 Daily-bar session Aug 27, 2026 Quote as of 2026-09-11 13:37:56.530 UTC Last $0.20 Breakeven $129.80 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this put
6	6	—	—	$32.00	$35.70	$56.40		$1.90	$0.00	$4.80	—	—	2	7
Call · $135 In the money Daily-bar session Mar 3, 2026 Quote as of 2026-09-11 19:59:45.799 UTC Last $56.40 Breakeven $191.40 Implied vol — Delta — Gamma — Theta — Vega — Open interest 6 OI effective date Sep 10, 2026 Model this call Put · $135 Daily-bar session May 26, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $1.90 Breakeven $133.10 Implied vol — Delta — Gamma — Theta — Vega — Open interest 7 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$27.00	$30.50	—		$2.01	$0.00	$4.80	—	—	1	2
Call · $140 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:45.799 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $140 Daily-bar session Jul 30, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $2.01 Breakeven $137.99 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this put
—	—	—	—	$22.00	$25.50	—		—	$0.00	$4.80	—	—	—	—
Call · $145 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:45.799 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $145 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$17.00	$20.90	—		—	$0.00	$4.80	—	—	—	—
Call · $150 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:40.047 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $150 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$12.00	$16.00	$8.70		$4.40	$0.00	$4.80	—	—	1	1
Call · $155 In the money Daily-bar session Jun 10, 2026 Quote as of 2026-09-11 19:58:40.825 UTC Last $8.70 Breakeven $163.70 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $155 Daily-bar session Jul 29, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $4.40 Breakeven $150.60 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this put
38	56	—	—	$7.00	$11.00	$13.00		$2.45	$0.00	$4.80	—	—	2	2
Call · $160 In the money Daily-bar session Aug 4, 2026 Quote as of 2026-09-11 19:59:26.234 UTC Last $13.00 Breakeven $173.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 38 OI effective date Sep 10, 2026 Model this call Put · $160 Daily-bar session Aug 4, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $2.45 Breakeven $157.55 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this put
1	1	21.1%	0.847	$2.50	$6.50	$4.50		—	$0.00	$4.80	—	—	—	—
Call · $165 In the money Daily-bar session Aug 20, 2026 Quote as of 2026-09-11 19:57:56.650 UTC Last $4.50 Breakeven $169.50 Implied vol 21.1% Delta 0.847 ≈85% ITM Gamma 0.057 Theta -0.113 Vega 0.047 Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $165 Daily-bar session Unknown Quote as of 2026-09-11 19:59:50.087 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
Underlying $169.08
23	1	40.7%	0.469	$0.75	$4.90	$4.00		$2.85	$0.80	$4.90	-0.548	30.5%	4	1
Call · $170 Daily-bar session Sep 3, 2026 Quote as of 2026-09-11 19:59:58.795 UTC Last $4.00 Breakeven $174.00 Implied vol 40.7% Delta 0.469 ≈47% ITM Gamma 0.049 Theta -0.329 Vega 0.079 Open interest 23 OI effective date Sep 10, 2026 Model this call Put · $170 In the money Daily-bar session Sep 8, 2026 Quote as of 2026-09-11 19:57:38.185 UTC Last $2.85 Breakeven $167.15 Implied vol 30.5% Delta -0.548 ≈55% ITM Gamma 0.066 Theta -0.229 Vega 0.078 Open interest 1 OI effective date Sep 10, 2026 Model this put
4	2	60.3%	0.328	$0.15	$4.80	$2.32		—	$4.60	$8.50	-0.801	33.5%	—	—
Call · $175 Daily-bar session Aug 20, 2026 Quote as of 2026-09-11 19:59:34.051 UTC Last $2.32 Breakeven $177.32 Implied vol 60.3% Delta 0.328 ≈33% ITM Gamma 0.03 Theta -0.437 Vega 0.072 Open interest 4 OI effective date Sep 10, 2026 Model this call Put · $175 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:45.980 UTC Last — Breakeven — Implied vol 33.5% Delta -0.801 ≈80% ITM Gamma 0.042 Theta -0.17 Vega 0.055 Open interest — OI effective date — Model this put
1	1	79.9%	0.269	$0.15	$4.80	$2.50		—	$9.80	$13.50	-0.842	51.4%	—	—
Call · $180 Daily-bar session Aug 13, 2026 Quote as of 2026-09-11 19:59:54.360 UTC Last $2.50 Breakeven $182.50 Implied vol 79.9% Delta 0.269 ≈27% ITM Gamma 0.021 Theta -0.526 Vega 0.065 Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $180 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:31.779 UTC Last — Breakeven — Implied vol 51.4% Delta -0.842 ≈84% ITM Gamma 0.024 Theta -0.23 Vega 0.048 Open interest — OI effective date — Model this put
—	1	—	—	$0.00	$4.80	$2.69		$24.50	$14.50	$18.50	-0.884	62.1%	1	—
Call · $185 Daily-bar session May 18, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $2.69 Breakeven $187.69 Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $185 In the money Daily-bar session Aug 18, 2026 Quote as of 2026-09-11 19:57:37.142 UTC Last $24.50 Breakeven $160.50 Implied vol 62.1% Delta -0.884 ≈88% ITM Gamma 0.016 Theta -0.223 Vega 0.039 Open interest — OI effective date — Model this put
2	3	—	—	$0.00	$4.80	$2.61		$9.09	$19.50	$23.50	-0.9	74.9%	2	1
Call · $190 Daily-bar session May 26, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $2.61 Breakeven $192.61 Implied vol — Delta — Gamma — Theta — Vega — Open interest 2 OI effective date Sep 10, 2026 Model this call Put · $190 In the money Daily-bar session Feb 17, 2026 Quote as of 2026-09-11 19:58:06.041 UTC Last $9.09 Breakeven $180.91 Implied vol 74.9% Delta -0.9 ≈90% ITM Gamma 0.012 Theta -0.243 Vega 0.035 Open interest 1 OI effective date Sep 10, 2026 Model this put
12	10	—	—	$0.00	$4.80	$0.15		—	$24.50	$28.50	-0.911	86.9%	—	—
Call · $195 Daily-bar session Sep 4, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $0.15 Breakeven $195.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 12 OI effective date Sep 10, 2026 Model this call Put · $195 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:37.596 UTC Last — Breakeven — Implied vol 86.9% Delta -0.911 ≈91% ITM Gamma 0.009 Theta -0.259 Vega 0.032 Open interest — OI effective date — Model this put
21	20	—	—	$0.00	$4.80	$0.15		$39.00	$29.50	$33.50	-0.919	98.3%	1	—
Call · $200 Daily-bar session Sep 4, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $0.15 Breakeven $200.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 21 OI effective date Sep 10, 2026 Model this call Put · $200 In the money Daily-bar session Aug 18, 2026 Quote as of 2026-09-11 19:57:37.595 UTC Last $39.00 Breakeven $161.00 Implied vol 98.3% Delta -0.919 ≈92% ITM Gamma 0.008 Theta -0.272 Vega 0.03 Open interest — OI effective date — Model this put
20	20	—	—	$0.00	$0.50	$0.15		—	$39.50	$43.50	—	—	—	—
Call · $210 Daily-bar session Sep 4, 2026 Quote as of 2026-09-11 13:30:38.328 UTC Last $0.15 Breakeven $210.15 Implied vol — Delta — Gamma — Theta — Vega — Open interest 20 OI effective date Sep 10, 2026 Model this call Put · $210 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:37.989 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
5	5	—	—	$0.00	$4.80	$14.30		$34.21	$49.50	$53.50	—	—	2	—
Call · $220 Daily-bar session Feb 9, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $14.30 Breakeven $234.30 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 OI effective date Sep 10, 2026 Model this call Put · $220 In the money Daily-bar session Jan 20, 2026 Quote as of 2026-09-11 19:57:38.083 UTC Last $34.21 Breakeven $185.79 Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$59.40	$63.50	—	—	—	—
Call · $230 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $230 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:46.682 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$69.50	$73.50	—	—	—	—
Call · $240 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $240 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:59:05.403 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$79.50	$83.50	—	—	—	—
Call · $250 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $250 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:40.609 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$89.50	$93.50	—	—	—	—
Call · $260 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $260 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:57:41.179 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$4.80	—		—	$99.40	$103.50	—	—	—	—
Call · $270 Daily-bar session Unknown Quote as of 2026-09-11 13:35:46.186 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $270 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:58:41.441 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$4.80	$2.20		—	$109.50	$113.50	—	—	—	—
Call · $280 Daily-bar session Feb 24, 2026 Quote as of 2026-09-11 13:35:46.186 UTC Last $2.20 Breakeven $282.20 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 10, 2026 Model this call Put · $280 In the money Daily-bar session Unknown Quote as of 2026-09-11 19:58:24.250 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put

About this data

Each contract's last price, day range and volume belong to the daily-bar session shown in its details; unknown means the source omitted that timestamp. Open interest has its own effective date shown separately; implied volatility and greeks are model values computed when fetched. This chain has mixed daily-bar sessions · Jan 20, 2026–Sep 8, 2026; 31 unknown. Positioning totals are shown only when every returned open-interest value has the same known effective date. Bid and ask are real-time consolidated OPRA readings.

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 29" for the wings. Max pain is the listed strike where the most open interest would expire worthless — a positioning reference, not a forecast.

Key facts CIK 897077 CUSIP 011311107 13F (30d) 76 filings 75 filers Visit website Investor relations