Arthur J. Gallagher (AJG) Options Chain

NYSE: AJGFinanceSpecialty InsurersUSD

232.70-1.35 (-0.58%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Expiration date

Expiration: Dec 18, 2026
Days to expiration: 68
Share price: $232.70
Put/call ratio (OI): 0.22
Put/call ratio (volume): 0.42
ATM implied volatility: 35.5%
Expected move: ±$35.61
Open interest (C / P): 2.50K / 559

AJG options summary

The AJG options chain for the December 18, 2026 expiration lists 30 call and 31 put contracts, with 68 days until expiration. Open interest stands at 2,496 calls and 559 puts, a put/call ratio of 0.22, which is tilted bullish, with calls outnumbering puts. At-the-money implied volatility near the $230.00 strike is 35.5%, which implies the market expects a move of about ±$35.61 (15.3%) in Arthur J. Gallagher stock by expiration.

The most open interest sits at the $250.00 call (758 contracts) and the $230.00 put (86 contracts).

Summary generated from market data by MetaCap's automated system. Methodology

AJG options chain · December 18, 2026

AJG calls and puts by strike price. Shaded cells are in the money.
Calls							Puts
OI	Vol	IV	Last	Bid	Ask	Strike	Bid	Ask	Last	IV	Vol	OI
5	3	335.7%	129.95	160.40	164.10	110.00	0.00	2.15	0.15	98.2%	2	26
2	2	81.5%	116.00	116.20	120.20	115.00	0.00	2.15	0.35	93.1%	9	5
—	—	—	—	—	—	120.00	0.00	0.00	1.75	25.0%	1	0
—	—	—	—	—	—	125.00	0.00	0.00	2.10	25.0%	1	0
0	—	—	75.25	0.00	0.00	130.00	0.00	0.00	2.27	25.0%	22	0
3	3	—	81.28	79.90	83.50	135.00	0.00	2.15	0.66	74.3%	1	2
—	—	—	—	—	—	140.00	0.00	0.75	0.30	58.1%	1	23
—	—	—	—	—	—	145.00	0.00	1.85	0.40	64.0%	1	0
—	—	—	—	—	—	150.00	0.00	0.00	0.25	25.0%	1	0
6	3	55.3%	90.50	76.70	80.40	155.00	0.00	1.60	2.95	54.6%	1	2
6	1	55.4%	85.70	72.20	75.60	160.00	0.20	3.20	4.45	60.0%	1	20
0	1	—	62.20	0.00	0.00	165.00	0.00	0.90	1.80	48.6%	1	11
3	1	53.6%	60.50	63.20	66.00	170.00	0.00	1.00	0.45	46.1%	2	16
3	2	58.7%	71.10	58.00	61.10	175.00	0.00	0.00	0.77	12.5%	1	0
1	—	55.9%	64.50	53.40	56.40	180.00	0.65	1.50	0.95	43.1%	2	6
—	—	—	—	—	—	185.00	0.90	1.90	2.05	42.1%	1	14
1	2	90.7%	36.93	56.90	60.30	190.00	1.25	3.10	2.45	44.6%	1	24
11	2	—	24.70	33.50	36.20	195.00	1.70	2.75	3.30	38.9%	1	72
22	1	45.4%	60.05	36.10	38.10	200.00	2.95	3.50	3.90	38.1%	1	62
117	74	31.3%	31.10	24.10	26.60	210.00	4.80	5.50	5.60	36.6%	4	85
40	1	39.9%	19.00	20.50	22.80	220.00	7.20	8.30	7.60	35.0%	1	24
217	1	37.2%	12.90	15.00	16.30	230.00	11.00	12.20	11.60	33.7%	25	86
AJG $232.70
195	1	36.0%	10.90	10.20	11.40	240.00	16.20	17.60	20.25	33.3%	2	10
758	1	35.6%	6.20	6.60	7.80	250.00	22.10	24.10	27.97	32.9%	1	14
140	1	35.7%	4.90	4.20	5.30	260.00	29.60	32.20	34.03	34.5%	1	7
230	1	36.0%	3.20	2.85	3.60	270.00	38.80	40.40	40.28	34.2%	2	39
62	1	37.2%	1.65	1.30	2.60	280.00	46.50	49.60	54.46	35.9%	5	4
395	102	37.6%	1.30	0.90	1.75	290.00	55.90	58.60	61.14	35.0%	5	2
127	1	39.2%	1.05	0.25	1.35	300.00	85.50	89.30	85.74	101.3%	5	0
56	3	38.5%	1.35	0.00	0.80	310.00	87.60	90.70	98.38	83.6%	5	5
15	11	41.4%	0.70	0.00	0.75	320.00	85.40	89.60	53.50	52.5%	16	0
75	75	55.5%	5.10	0.90	3.50	330.00	—	—	—	—	—	—
1	1	53.6%	0.45	0.00	2.85	340.00	—	—	—	—	—	—
3	1	63.1%	1.35	1.05	2.70	360.00	—	—	—	—	—	—
1	—	60.5%	0.30	0.00	2.40	370.00	—	—	—	—	—	—
1	—	62.7%	0.25	0.00	2.30	380.00	—	—	—	—	—	—

In-the-money callsIn-the-money puts. IV = implied volatility, OI = open interest (contracts). Each contract covers 100 shares. Quotes delayed at least 15 minutes.

Frequently asked questions

What is the AJG put/call ratio?

For the December 18, 2026 expiration, the AJG put/call ratio based on open interest is 0.22 (559 puts vs 2,496 calls), and 0.42 based on today's volume. A ratio above 1 means more puts than calls.

What is AJG's implied volatility?

At-the-money implied volatility for AJG options expiring December 18, 2026 is about 35.5%, an annualized estimate of how much the market expects Arthur J. Gallagher stock to move.

How many AJG option expiration dates are there?

AJG has 5 listed expiration dates, from Oct 16, 2026 to Apr 16, 2027.

What does "in the money" mean?

A call is in the money when the strike price is below the current share price; a put is in the money when the strike is above it. In-the-money contracts have intrinsic value and are shaded in the table.