As more fully discussed in Note 7 to the Consolidated Financial Statements included in EOG's 2020 Annual Report, EOG maintains various stock-based compensation plans. Stock-based compensation expense is included on the Condensed Consolidated Statements of Income (Loss) and Comprehensive Income (Loss) based upon the job function of the employees receiving the grants as follows (in millions):


	Three Months Ended September 30,				Nine Months Ended September 30,
	2021		2020		2021		2020
Lease and Well	$	11	$	9	$	36	$	39
Gathering and Processing Costs	1		—		2		1
Exploration Costs	4		1		15		15
General and Administrative	35		23		64		58
Total	$	51	$	33	$	117	$	113

The Amended and Restated EOG Resources, Inc. 2008 Omnibus Equity Compensation Plan (2008 Plan) provided for grants of stock options, stock-settled stock appreciation rights (SARs), restricted stock and restricted stock units, performance units and other stock-based awards.

EOG's stockholders approved the EOG Resources, Inc. 2021 Omnibus Equity Compensation Plan (2021 Plan) at the 2021 Annual Meeting of Stockholders. Therefore, no further grants were made from the 2008 Plan from and after the April 29, 2021 effective date of the 2021 Plan. The 2021 Plan provides for grants of stock options, SARs, restricted stock and restricted stock units, restricted stock units with performance-based conditions (together with the performance units granted under the 2008 Plan, "Performance Units") and other stock-based awards, up to an aggregate maximum of 20 million shares of common stock, plus any shares that are subject to outstanding awards under the 2008 Plan as of April 29, 2021, that are subsequently canceled, forfeited, expire or are otherwise not issued or are settled in cash. Under the 2021 Plan, grants may be made to employees and non-employee members of EOG's Board of Directors (Board). EOG's policy is to issue shares related to 2021 Plan grants from previously authorized unissued shares or treasury shares to the extent treasury shares are available.

Stock Options and Stock-Settled Stock Appreciation Rights and Employee Stock Purchase Plan. The fair value of stock option grants and SAR grants is estimated using the Hull-White II binomial option pricing model. The fair value of Employee Stock Purchase Plan (ESPP) grants is estimated using the Black-Scholes-Merton model. Stock-based compensation expense related to stock option, SAR and ESPP grants totaled $20 million and $23 million during the three months ended September 30, 2021 and 2020, respectively, and $39 million and $52 million during the nine months ended September 30, 2021 and 2020, respectively.


	Stock Options/SARs						ESPP
	Nine Months Ended September 30,						Nine Months Ended September 30,
	2021			2020			2021			2020
Weighted Average Fair Value of Grants	$	24.92		$	11.06		$	18.15		$	18.96
Expected Volatility	42.24		%	44.46		%	51.23		%	55.53		%
Risk-Free Interest Rate	0.50		%	0.21		%	0.07		%	0.83		%
Dividend Yield	2.25		%	3.27		%	2.88		%	2.35		%
Expected Life	5.2 years			5.2 years			0.5 years			0.5 years

Expected volatility is based on an equal weighting of historical volatility and implied volatility from traded options in EOG's common stock. The risk-free interest rate is based upon United States Treasury yields in effect at the time of grant. The expected life is based upon historical experience and contractual terms of stock option, SAR and ESPP grants.


	Nine Months Ended September 30, 2021			Nine Months Ended September 30, 2020
	Number of Stock Options/SARs	Weighted Average Exercise Price		Number of Stock Options/SARs	Weighted Average Exercise Price
Outstanding at January 1	10,186	$	84.08	9,395	$	94.53
Granted	1,976	81.66		1,993	37.62
Exercised (1)	(448)	64.18		(23)	69.59
Forfeited	(984)	98.64		(1,077)	88.54
Outstanding at September 30 (2)	10,730	$	83.13	10,288	$	84.19
Vested or Expected to Vest (3)	10,407	$	83.65	9,963	$	84.86
Exercisable at September 30 (4)	6,906	$	92.39	6,389	$	96.53

(1)The total intrinsic value of stock options/SARs exercised during the nine months ended September 30, 2021 and 2020 was $8 million and $0.4 million, respectively. The intrinsic value is based upon the difference between the market price of EOG's common stock on the date of exercise and the exercise price of the stock options/SARs.

(2)The total intrinsic value of stock options/SARs outstanding at September 30, 2021 and 2020 was $95 million and $0.01 million, respectively. At September 30, 2021 and 2020, the weighted average remaining contractual life was 4.3 years and 4.5 years, respectively.

(3)The total intrinsic value of stock options/SARs vested or expected to vest at September 30, 2021 and 2020 was $90 million and $0.01 million, respectively. At September 30, 2021 and 2020, the weighted average remaining contractual life was 4.3 years and 4.5 years, respectively.

(4)The total intrinsic value of stock options/SARs exercisable at September 30, 2021 and 2020 was $38 million and zero, respectively. At September 30, 2021 and 2020, the weighted average remaining contractual life was 3.2 years and 3.4 years, respectively.

At September 30, 2021, unrecognized compensation expense related to non-vested stock option, SAR and ESPP grants totaled $69 million. Such unrecognized expense will be amortized on a straight-line basis over a weighted average period of 2.3 years.

Restricted Stock and Restricted Stock Units. Employees may be granted restricted (non-vested) stock and/or restricted stock units without cost to them. Stock-based compensation expense related to restricted stock and restricted stock units totaled $20 million and $4 million for the three months ended September 30, 2021 and 2020, respectively, and $65 million and $53 million for the nine months ended September 30, 2021 and 2020, respectively.


	Nine Months Ended September 30, 2021			Nine Months Ended September 30, 2020
	Number of Shares and Units	Weighted Average Grant Date Fair Value		Number of Shares and Units	Weighted Average Grant Date Fair Value
Outstanding at January 1	4,742	$	74.97	4,546	$	90.16
Granted	1,409	81.44		1,440	38.16
Released (1)	(1,321)	101.63		(1,139)	85.94
Forfeited	(65)	68.49		(63)	90.00
Outstanding at September 30 (2)	4,765	$	69.58	4,784	$	75.51

(1)The total intrinsic value of restricted stock and restricted stock units released during the nine months ended September 30, 2021 and 2020 was $104 million and $45 million, respectively. The intrinsic value is based upon the closing price of EOG's common stock on the date the restricted stock and restricted stock units are released.

At September 30, 2021, unrecognized compensation expense related to restricted stock and restricted stock units totaled $224 million. Such unrecognized expense will be amortized on a straight-line basis over a weighted average period of 1.8 years.

Performance Units. EOG grants Performance Units annually to its executive officers without cost to them. As more fully discussed in the grant agreements, the performance metric applicable to the Performance Units is EOG's total shareholder return over a three-year performance period relative to the total shareholder return of a designated group of peer companies (Performance Period). Upon the application of the performance multiple at the completion of the Performance Period, a minimum of 0% and a maximum of 200% of the Performance Units granted could be outstanding. The fair value of the Performance Units is estimated using a Monte Carlo simulation. Stock-based compensation expense related to the Performance Unit grants totaled $11 million and $6 million for the three months ended September 30, 2021 and 2020, respectively, and $13 million and $8 million for the nine months ended September 30, 2021 and 2020, respectively.


	Nine Months Ended September 30, 2021				Nine Months Ended September 30, 2020
	Number of Units		Weighted Average Grant Date Fair Value		Number of Units	Weighted Average Grant Date Fair Value
Outstanding at January 1	613		$	88.38	598	$	103.91
Granted	222		90.94		172	42.77
Granted for Performance Multiple (1)	19		113.81		66	119.10
Released (2)	(175)		113.06		(223)	103.87
Forfeited	—		—		—	—
Outstanding at September 30 (3)	679	(4)	$	83.59	613	$	88.38

(1)Upon completion of the Performance Period for the Performance Units granted in 2017 and 2016, a performance multiple of 125% and 150%, respectively, was applied to each of the grants resulting in additional grants of Performance Units in February 2021 and February 2020, respectively.

(2)The total intrinsic value of Performance Units released was $13 million for both the nine months ended September 30, 2021 and 2020. The intrinsic value is based upon the closing price of EOG's common stock on the date the Performance Units are released.

At September 30, 2021, unrecognized compensation expense related to Performance Units totaled $15 million. Such unrecognized expense will be amortized on a straight-line basis over a weighted average period of 2.1 years.