WSO · Watsco Inc

Track WSO — free

$315.13 -0.25 (-0.08%) At close · Sep 4

S&P 400 member Russell 1000 member Rebalance outlook locked

Market Cap

$13.00B

41.25M

Options Chain

Underlying $315.13 · at close Sep 4, 2026 Options Calculator

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

Positioning

Sep 18, 2026 · 10 days to expiry · 60 contracts · mixed daily-bar sessions · Jul 21, 2026–Sep 4, 2026; 34 unknown

Put / call OI

0.44

Call-heavy positioning

Open interest

1,173

as of Sep 3, 2026

Volume

—

dated and unknown daily-bar sessions

Max pain

$310.00

$5.13 below spot

ATM implied vol

35.3%

market's expected move

Open interest by strike · near the money

Calls Puts

240

250

260

270

280

290

300

310

320

330

340

350

360

370

380

390

400

410

420

430

440

450

460

470

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490

500

510

520

530

Chain

Click any strike for greeks, breakeven and the calculator

Expiry

Sep 18 10d Oct 16 38d Nov 20 73d Feb 19 164d

Calls								Puts
OI	Vol	IV	Δ	Bid	Ask	Last	Strike	Last	Bid	Ask	Δ	IV	Vol	OI
41	40	103.5%	0.954	$74.00	$78.90	$74.00		—	$0.00	$0.65	—	—	—	—
Call · $240 In the money Daily-bar session Aug 26, 2026 Quote as of 2026-09-04 19:59:59.725 UTC Last $74.00 Breakeven $314.00 Implied vol 103.5% Delta 0.954 ≈95% ITM Gamma 0.002 Theta -0.282 Vega 0.051 Open interest 41 OI effective date Sep 3, 2026 Model this call Put · $240 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.687 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	91.5%	0.946	$64.00	$69.00	—		$0.50	$0.00	$1.70	—	—	3	5
Call · $250 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.682 UTC Last — Breakeven — Implied vol 91.5% Delta 0.946 ≈95% ITM Gamma 0.002 Theta -0.281 Vega 0.057 Open interest — OI effective date — Model this call Put · $250 Daily-bar session Aug 25, 2026 Quote as of 2026-09-04 19:59:59.648 UTC Last $0.50 Breakeven $249.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 OI effective date Sep 3, 2026 Model this put
—	—	79.5%	0.937	$54.00	$59.10	—		$1.25	$0.00	$1.50	—	—	1	6
Call · $260 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.681 UTC Last — Breakeven — Implied vol 79.5% Delta 0.937 ≈94% ITM Gamma 0.003 Theta -0.277 Vega 0.064 Open interest — OI effective date — Model this call Put · $260 Daily-bar session Aug 14, 2026 Quote as of 2026-09-04 19:59:59.682 UTC Last $1.25 Breakeven $258.75 Implied vol — Delta — Gamma — Theta — Vega — Open interest 6 OI effective date Sep 3, 2026 Model this put
—	—	67.7%	0.926	$44.00	$49.20	—		$0.73	$0.10	$1.50	-0.057	61.2%	1	21
Call · $270 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.688 UTC Last — Breakeven — Implied vol 67.7% Delta 0.926 ≈93% ITM Gamma 0.004 Theta -0.27 Vega 0.073 Open interest — OI effective date — Model this call Put · $270 Daily-bar session Aug 28, 2026 Quote as of 2026-09-04 19:59:59.701 UTC Last $0.73 Breakeven $269.27 Implied vol 61.2% Delta -0.057 ≈6% ITM Gamma 0.004 Theta -0.18 Vega 0.059 Open interest 21 OI effective date Sep 3, 2026 Model this put
1	1	59.1%	0.897	$34.30	$39.60	$23.00		$1.15	$0.10	$1.60	-0.071	50.4%	50	82
Call · $280 In the money Daily-bar session Aug 25, 2026 Quote as of 2026-09-04 19:59:31.175 UTC Last $23.00 Breakeven $303.00 Implied vol 59.1% Delta 0.897 ≈90% ITM Gamma 0.006 Theta -0.298 Vega 0.093 Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $280 Daily-bar session Sep 1, 2026 Quote as of 2026-09-04 19:59:59.620 UTC Last $1.15 Breakeven $278.85 Implied vol 50.4% Delta -0.071 ≈7% ITM Gamma 0.005 Theta -0.176 Vega 0.071 Open interest 82 OI effective date Sep 3, 2026 Model this put
—	—	49.9%	0.855	$24.60	$30.20	—		$1.00	$0.50	$3.90	-0.152	51.5%	4	143
Call · $290 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.620 UTC Last — Breakeven — Implied vol 49.9% Delta 0.855 ≈86% ITM Gamma 0.009 Theta -0.318 Vega 0.119 Open interest — OI effective date — Model this call Put · $290 Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:59:59.989 UTC Last $1.00 Breakeven $289.00 Implied vol 51.5% Delta -0.152 ≈15% ITM Gamma 0.009 Theta -0.311 Vega 0.123 Open interest 143 OI effective date Sep 3, 2026 Model this put
4	1	43.9%	0.766	$16.30	$21.00	$13.10		$2.20	$1.80	$4.80	-0.236	44.2%	3	50
Call · $300 In the money Daily-bar session Aug 28, 2026 Quote as of 2026-09-04 19:59:59.888 UTC Last $13.10 Breakeven $313.10 Implied vol 43.9% Delta 0.766 ≈77% ITM Gamma 0.013 Theta -0.371 Vega 0.16 Open interest 4 OI effective date Sep 3, 2026 Model this call Put · $300 Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:59:59.888 UTC Last $2.20 Breakeven $297.80 Implied vol 44.2% Delta -0.236 ≈24% ITM Gamma 0.013 Theta -0.348 Vega 0.161 Open interest 50 OI effective date Sep 3, 2026 Model this put
8	2	36%	0.626	$9.00	$11.90	$10.40		$4.50	$4.20	$5.70	-0.373	35.6%	3	19
Call · $310 In the money Daily-bar session Sep 2, 2026 Quote as of 2026-09-04 19:59:59.642 UTC Last $10.40 Breakeven $320.40 Implied vol 36% Delta 0.626 ≈63% ITM Gamma 0.02 Theta -0.373 Vega 0.198 Open interest 8 OI effective date Sep 3, 2026 Model this call Put · $310 Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:59:59.888 UTC Last $4.50 Breakeven $305.50 Implied vol 35.6% Delta -0.373 ≈37% ITM Gamma 0.02 Theta -0.34 Vega 0.198 Open interest 19 OI effective date Sep 3, 2026 Model this put
Underlying $315.13
42	41	36.1%	0.416	$4.30	$6.70	$4.80		$20.10	$8.80	$10.70	-0.589	34.5%	1	3
Call · $320 Daily-bar session Aug 28, 2026 Quote as of 2026-09-04 19:59:59.815 UTC Last $4.80 Breakeven $324.80 Implied vol 36.1% Delta 0.416 ≈42% ITM Gamma 0.021 Theta -0.379 Vega 0.204 Open interest 42 OI effective date Sep 3, 2026 Model this call Put · $320 In the money Daily-bar session Aug 25, 2026 Quote as of 2026-09-04 19:59:59.815 UTC Last $20.10 Breakeven $299.90 Implied vol 34.5% Delta -0.589 ≈59% ITM Gamma 0.022 Theta -0.332 Vega 0.203 Open interest 3 OI effective date Sep 3, 2026 Model this put
522	537	34.5%	0.223	$1.40	$3.10	$2.50		$28.50	$13.10	$19.00	-0.818	29.3%	2	28
Call · $330 Daily-bar session Sep 4, 2026 Quote as of 2026-09-04 19:59:59.620 UTC Last $2.50 Breakeven $332.50 Implied vol 34.5% Delta 0.223 ≈22% ITM Gamma 0.017 Theta -0.275 Vega 0.156 Open interest 522 OI effective date Sep 3, 2026 Model this call Put · $330 In the money Daily-bar session Aug 25, 2026 Quote as of 2026-09-04 19:59:59.639 UTC Last $28.50 Breakeven $301.50 Implied vol 29.3% Delta -0.818 ≈82% ITM Gamma 0.017 Theta -0.177 Vega 0.138 Open interest 28 OI effective date Sep 3, 2026 Model this put
80	1	31.5%	0.079	$0.15	$1.00	$0.65		—	$21.60	$27.00	—	—	—	—
Call · $340 Daily-bar session Sep 1, 2026 Quote as of 2026-09-04 19:59:59.620 UTC Last $0.65 Breakeven $340.65 Implied vol 31.5% Delta 0.079 ≈8% ITM Gamma 0.009 Theta -0.123 Vega 0.077 Open interest 80 OI effective date Sep 3, 2026 Model this call Put · $340 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.663 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
11	1	—	—	$0.00	$1.50	$1.50		—	$31.30	$38.00	-0.983	29.5%	—	—
Call · $350 Daily-bar session Aug 20, 2026 Quote as of 2026-09-04 19:59:59.658 UTC Last $1.50 Breakeven $351.50 Implied vol — Delta — Gamma — Theta — Vega — Open interest 11 OI effective date Sep 3, 2026 Model this call Put · $350 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.712 UTC Last — Breakeven — Implied vol 29.5% Delta -0.983 ≈98% ITM Gamma 0.003 Theta -0.002 Vega 0.023 Open interest — OI effective date — Model this put
86	20	—	—	$0.00	$5.10	$0.57		$50.00	$41.30	$47.00	—	—	2	—
Call · $360 Daily-bar session Aug 27, 2026 Quote as of 2026-09-04 19:59:59.642 UTC Last $0.57 Breakeven $360.57 Implied vol — Delta — Gamma — Theta — Vega — Open interest 86 OI effective date Sep 3, 2026 Model this call Put · $360 In the money Daily-bar session Jul 29, 2026 Quote as of 2026-09-04 19:59:59.707 UTC Last $50.00 Breakeven $310.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$3.40	$19.24		—	$51.30	$56.80	—	—	—	—
Call · $370 Daily-bar session Jul 22, 2026 Quote as of 2026-09-04 19:59:59.663 UTC Last $19.24 Breakeven $389.24 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $370 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:50.625 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
8	10	—	—	$0.00	$1.70	$0.01		—	$61.30	$66.50	—	—	—	—
Call · $380 Daily-bar session Aug 20, 2026 Quote as of 2026-09-04 19:59:59.669 UTC Last $0.01 Breakeven $380.01 Implied vol — Delta — Gamma — Theta — Vega — Open interest 8 OI effective date Sep 3, 2026 Model this call Put · $380 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.683 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
5	5	—	—	$0.00	$8.10	$1.53		$34.60	$71.30	$79.00	-0.957	72.2%	1	—
Call · $390 Daily-bar session Jul 29, 2026 Quote as of 2026-09-04 19:59:59.898 UTC Last $1.53 Breakeven $391.53 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 OI effective date Sep 3, 2026 Model this call Put · $390 In the money Daily-bar session Jul 27, 2026 Quote as of 2026-09-04 19:59:59.876 UTC Last $34.60 Breakeven $355.40 Implied vol 72.2% Delta -0.957 ≈96% ITM Gamma 0.002 Theta -0.138 Vega 0.048 Open interest — OI effective date — Model this put
5	3	—	—	$0.00	$1.00	$9.00		—	$81.30	$86.70	—	—	—	—
Call · $400 Daily-bar session Jul 27, 2026 Quote as of 2026-09-04 19:59:59.769 UTC Last $9.00 Breakeven $409.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 5 OI effective date Sep 3, 2026 Model this call Put · $400 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.688 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$1.35	—		—	$91.30	$96.30	—	—	—	—
Call · $410 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.673 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $410 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.688 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$101.30	$108.30	-0.98	81.9%	—	—
Call · $420 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.704 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $420 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.876 UTC Last — Breakeven — Implied vol 81.9% Delta -0.98 ≈98% ITM Gamma 0.001 Theta -0.068 Vega 0.026 Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$2.10	—		—	$111.30	$116.50	—	—	—	—
Call · $430 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.682 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $430 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.703 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$2.30	$3.00		—	$121.30	$128.60	—	—	—	—
Call · $440 Daily-bar session Jul 21, 2026 Quote as of 2026-09-04 19:59:59.682 UTC Last $3.00 Breakeven $443.00 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $440 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.668 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$2.70	—		—	$131.30	$136.50	—	—	—	—
Call · $450 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.682 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $450 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.707 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$141.30	$147.30	—	—	—	—
Call · $460 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.777 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $460 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:56.926 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
1	1	—	—	$0.00	$0.05	$0.45		—	$151.30	$158.50	—	—	—	—
Call · $470 Daily-bar session Jul 29, 2026 Quote as of 2026-09-04 13:30:12.336 UTC Last $0.45 Breakeven $470.45 Implied vol — Delta — Gamma — Theta — Vega — Open interest 1 OI effective date Sep 3, 2026 Model this call Put · $470 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.682 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$161.30	$166.50	—	—	—	—
Call · $480 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.618 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $480 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.876 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$171.30	$178.20	—	—	—	—
Call · $490 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.642 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $490 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.688 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$181.30	$186.50	—	—	—	—
Call · $500 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.682 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $500 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.876 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$191.30	$198.50	—	—	—	—
Call · $510 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.682 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $510 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:50.625 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$201.30	$206.50	—	—	—	—
Call · $520 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.683 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $520 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.876 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this put
—	—	—	—	$0.00	$5.10	—		—	$211.30	$218.20	—	—	—	—
Call · $530 Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.683 UTC Last — Breakeven — Implied vol — Delta — Gamma — Theta — Vega — Open interest — OI effective date — Model this call Put · $530 In the money Daily-bar session Unknown Quote as of 2026-09-04 19:59:59.682 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 · Jul 21, 2026–Sep 4, 2026; 34 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 21 strikes around the money are shown by default — switch to "All 30" 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 105016 CUSIP 942622200 13F (30d) 365 filings 360 filers Visit website Investor relations