Taylor Stephen Charles

SEC source: 0001316004-26-000004 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Rabbi Trust

Disclosed balance after: 95,137

F1 · shares: Shares acquired through reinvestment of cash dividends pursuant to the terms of the deferred compensation plan.

SEC source: 0001316004-26-000003 · primary_doc.xml · derivative · entry 4

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,456 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Not applicable. Each RSU represented the right to receive one share of the Issuer's common stack upon vesting (or upon election by the reporting person, up to 50% of the RSUIs in cash).

F3 · derivative.exercise_date: Not applicable. Each RSU represented the right to receive one share of the Issuer's common stack upon vesting (or upon election by the reporting person, up to 50% of the RSUIs in cash).

F3 · derivative.expiration_date: Not applicable. Each RSU represented the right to receive one share of the Issuer's common stack upon vesting (or upon election by the reporting person, up to 50% of the RSUIs in cash).

SEC source: 0001316004-26-000003 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 197,818

F2 · kind: Represents an election by the reporting person to receive 50% of the value of the RSUs in cash.

F2 · price: Represents an election by the reporting person to receive 50% of the value of the RSUs in cash.

SEC source: 0001316004-26-000003 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 200,046

F1 · price: Not applicable. The reported shares were acquired in connection with the vesting of a restricted stock unit (RSU) award.

SEC source: 0001316004-26-000002 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 175,432

F2 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $37.1538 to $37.3455 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001316004-26-000002 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 205,432

F1 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $37.30 to $38.5596 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001316004-26-000001 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Rabbi Trust

Disclosed balance after: 114,961

F1 · shares: Shares acquired through reinvestment of cash dividends pursuant to the terms of the deferred compensation plan.

SEC source: 0001316004-25-000009 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 275,432

F2 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.50 to $33.72 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001316004-25-000009 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 285,432

F1 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $33.015 to $33.45 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001316004-25-000007 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 295,432

F1 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions at prices ranging from $31.83 to $32.28 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001316004-25-000008 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Rabbi Trust

Disclosed balance after: 114,625

F1 · shares: Shares acquired through reinvestment of cash dividend pursuant to the terms of the deferred compensation plan.

SEC source: 0001316004-25-000006 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 315,432

SEC source: 0001316004-25-000006 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 325,432

SEC source: 0001316004-25-000005 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 335,432

F1 · shares: The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.00 to $31.055 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote.

SEC source: 0001316004-25-000004 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 345,432

F1 · shares: The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.00 to $30.04 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote.

SEC source: 0001316004-25-000004 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 355,432

F1 · shares: The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.50 to $29.53 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote.

SEC source: 0001316004-25-000003 · primary_doc.xml · nonDerivative · entry 3

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 364,180

F1 · shares: The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.50 to $29.525 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote.

SEC source: 0001316004-25-000003 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 365,432

F1 · shares: The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.00 to $29.12 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote.

SEC source: 0001316004-25-000003 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 375,332

F1 · shares: The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

SEC source: 0001084991-25-000133 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 375,432

F1 · shares: The sales reported on this Form 4 were effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.50 to $28.53 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote.

SEC source: 0001084991-25-000132 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 383,347

F1 · shares: The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

SEC source: 0001084991-25-000131 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 384,106

F1 · shares: The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

SEC source: 0001084991-25-000130 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 385,432

F1 · shares: The sales reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.00 to $28.18 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in this footnote.

SEC source: 0001084991-25-000130 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 395,432

F1 · shares: The sales reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

SEC source: 0001084991-25-000129 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 396,889

F1 · shares: The sales reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

SEC source: 0001084991-25-000128 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 396,952

F1 · shares: The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported n Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.50 to $27.505 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-25-000127 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 398,590

F1 · shares: The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.50 to $27.59 inclusive. The reporting person undertakes to provide NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-25-000126 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 405,143

F1 · shares: The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price, if applicable.

SEC source: 0001084991-25-000125 · primary_doc.xml · derivative · entry 3

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,098 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Not applicable. Each Restricted Stock Unit represented the right to receive one share of the Issuer's common stock upon vesting (or upon election by the reporting person, up to 50% of the RSUs in cash).

F2 · derivative.exercise_date: Not applicable. Each Restricted Stock Unit represented the right to receive one share of the Issuer's common stock upon vesting (or upon election by the reporting person, up to 50% of the RSUs in cash).

F2 · derivative.expiration_date: Not applicable. Each Restricted Stock Unit represented the right to receive one share of the Issuer's common stock upon vesting (or upon election by the reporting person, up to 50% of the RSUs in cash).

SEC source: 0001084991-25-000125 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 405,432

F1 · price: Not applicable. The reported shares were acquired in connection with the vesting of a Restricted Stock Unit award.

SEC source: 0001084991-25-000123 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 403,334

F1 · shares: The sale reported on this Form 4 was effectuated pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.00 to $27.015 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-25-000118 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 413,334

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.00 to $26.095 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price with the range set forth in this footnote.

SEC source: 0001084991-25-000118 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 423,334

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 16, 2025

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.50 to $26.57 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-25-000119 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · Rabbi Trust

Disclosed balance after: 114,213

F1 · shares: Shares acquired through reinvestment of cash dividend pursuant to the terms of the deferred compensation plan.

SEC source: 0001084991-25-000076 · primary_doc.xml · derivative · entry 3

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,456

Underlying: Common Stock · 4,456 shares

Expires not disclosed

F1 · derivative.exercise_price: Not applicable. Each Restricted Stock Unit represents the right to receive one share of the Issuer's common stock upon vesting.

F2 · derivative.exercise_date: Not Applicable. The acquisition reflects an award of Restricted Stock Units pursuant to the Company's 2019 Equity Incentive Plan. The award vests on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances.

F2 · derivative.expiration_date: Not Applicable. The acquisition reflects an award of Restricted Stock Units pursuant to the Company's 2019 Equity Incentive Plan. The award vests on the first anniversary of the grant date, subject to accelerated vesting under certain circumstances.

SEC source: 0001084991-25-000071 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 433,334

F1 · price: These shares were sold in multiple transactions at prices ranging from $24.75 to $25.21 inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-25-000010 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 438,387

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.00 to $29.34 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-25-000010 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 448,387

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.50 to $28.90 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000151 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 457,787

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.00 to $27.35 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000129 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 467,787

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

SEC source: 0001084991-24-000129 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 468,387

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.00 to $28.075 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000126 · primary_doc.xml · nonDerivative · entry 3

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 478,387

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.50 to $27.56, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000126 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 516,866

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $26.00 to $26.005, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000126 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 518,387

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.50 to $25.51, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000125 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 524,903

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.50 to $25.585 inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000125 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 528,345

F1 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.00 to $25.50, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000110 · primary_doc.xml · nonDerivative · entry 3

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 538,387

F4 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

SEC source: 0001084991-24-000110 · primary_doc.xml · nonDerivative · entry 2

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 540,578

F4 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.50 to $24.59, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000110 · primary_doc.xml · nonDerivative · entry 1

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 545,291

F4 · shares: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan established by the reporting person on May 22, 2024.

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.50 to $24.53, inclusive. The reporting person undertakes to provide to NGS, any security holder of NGS, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0001084991-24-000098 · primary_doc.xml · derivative · entry 3

Taylor Stephen Charles · CIK 0001316004 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,195

Underlying: Common Stock · 4,195 shares

Expires not disclosed

F1 · derivative.exercise_price: Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting.

F1 · derivative.exercise_date: Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting.

F1 · derivative.expiration_date: Not applicable. Each RSU represents the right to receive one share of the Issuer's common stock upon vesting.