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Nasdaq · USD

SHEN

SHENANDOAH TELECOMMUNICATIONS CO/VA/

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2567
SEC CIK
0000354963
Parsed reports
1,155

Last 12 months

Inside the activity.

3 purchase rows · 0 sale rows

Disclosed non-derivative P/S rows, by transaction month. Includes amendments and private transactions.
Monthly counts
MonthPurchasesSales
Nov 202500
Dec 202500
Jan 202600
Feb 202600
Mar 202600
Apr 202600
May 202600
Jun 202600
Jul 202630
Aug 202600
Sep 202600
Oct 202600

Latest available

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateOwner / reported roleActivity / securityShares / unitsReported priceReported valueDetails
February 02, 2026 Filed Feb 17, 2026 13:25 UTC Amendment
CHENG ELAINESVP & Chief Info Officer
Tax withholdingCommon Stock 3,480 $11.87 $41,307.60
Disclosure

SEC source: 0000354963-26-000066 · form4.xml · nonDerivative · entry 3

CHENG ELAINE · CIK 0001770403 · SVP & Chief Info Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,216

F3 · balance_after: This Form 4/A is being filed to correct an immaterial clerical error in the number of shares reported as vesting pursuant to Strategic Retention Performance Share Units in the Form 4 filed on February 5, 2026.

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February 02, 2026 Filed Feb 17, 2026 13:25 UTC Amendment
CHENG ELAINESVP & Chief Info Officer
GrantCommon Stock 3,562 $0.00 $0.00
Disclosure

SEC source: 0000354963-26-000066 · form4.xml · nonDerivative · entry 2

CHENG ELAINE · CIK 0001770403 · SVP & Chief Info Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 33,696

F2 · shares: Represents the vesting Strategic Retention Performance Share Units granted February 22, 2023. Performance for this award was measured based on the number of Fiber-To-The-Home passings, capital expenditure per incremental passings, and Adjusted Earnings Before Interest Taxes, Depreciation and Amortization for the three-year period ending December 31, 2025.

F3 · shares: This Form 4/A is being filed to correct an immaterial clerical error in the number of shares reported as vesting pursuant to Strategic Retention Performance Share Units in the Form 4 filed on February 5, 2026.

F4 · acquired: Form 4/A filed on February 12, 2026 is being amended to correct a minor clerical error (the transaction code in Column 4 of Table 1 should be reported as "A"). The original Form 4 was filed on February 5, 2026.

F3 · balance_after: This Form 4/A is being filed to correct an immaterial clerical error in the number of shares reported as vesting pursuant to Strategic Retention Performance Share Units in the Form 4 filed on February 5, 2026.

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February 02, 2026 Filed Feb 17, 2026 13:25 UTC Amendment
CHENG ELAINESVP & Chief Info Officer
GrantCommon Stock 6,262 $0.00 $0.00
Disclosure

SEC source: 0000354963-26-000066 · form4.xml · nonDerivative · entry 1

CHENG ELAINE · CIK 0001770403 · SVP & Chief Info Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,134

F1 · shares: Represents vesting of performance-based Restricted Stock Units granted February 22, 2023. Performance for this award was measured on the Issuer's relative total return (TSR) compared to the TSR of a group of companies in the NASDAQ Telecom Index with a Market Cap between 100 million and 100 billion, above and below the Issuer's then current Market Cap.

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February 02, 2026 Filed Feb 17, 2026 13:22 UTC Amendment
McKay Edward HPresident & CEO
Tax withholdingCommon Stock 7,228 $11.87 $85,796.36
Disclosure

SEC source: 0000354963-26-000064 · form4.xml · nonDerivative · entry 3

McKay Edward H · CIK 0001494886 · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 117,160

F3 · balance_after: This Form 4/A is being filed to correct an immaterial clerical error in the number of shares reported as vesting pursuant to Strategic Retention Performance Share Units in the Form 4 filed on February 5, 2026.

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February 02, 2026 Filed Feb 17, 2026 13:22 UTC Amendment
McKay Edward HPresident & CEO
GrantCommon Stock 10,007 $0.00 $0.00
Disclosure

SEC source: 0000354963-26-000064 · form4.xml · nonDerivative · entry 2

McKay Edward H · CIK 0001494886 · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 124,388

F2 · shares: Represents the vesting Strategic Retention Performance Share Units granted February 22, 2023. Performance for this award was measured based on the number of Fiber-To-The-Home passings, capital expenditure per incremental passings, and Adjusted Earnings Before Interest Taxes, Depreciation and Amortization for the three-year period ending December 31, 2025.

F3 · shares: This Form 4/A is being filed to correct an immaterial clerical error in the number of shares reported as vesting pursuant to Strategic Retention Performance Share Units in the Form 4 filed on February 5, 2026.

F4 · acquired: Form 4/A filed on February 12, 2026 is being amended to correct a minor clerical error (the transaction code in Column 4 of Table 1 should be reported as "A"). The original Form 4 was filed on February 5, 2026.

F3 · balance_after: This Form 4/A is being filed to correct an immaterial clerical error in the number of shares reported as vesting pursuant to Strategic Retention Performance Share Units in the Form 4 filed on February 5, 2026.

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February 02, 2026 Filed Feb 17, 2026 13:22 UTC Amendment
McKay Edward HPresident & CEO
GrantCommon Stock 12,204 $0.00 $0.00
Disclosure

SEC source: 0000354963-26-000064 · form4.xml · nonDerivative · entry 1

McKay Edward H · CIK 0001494886 · President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 114,381

F1 · shares: Represents vesting of performance-based Restricted Stock Units granted February 22, 2023. Performance for this award was measured on the Issuer's relative total return (TSR) compared to the TSR of a group of companies in the NASDAQ Telecom Index with a Market Cap between 100 million and 100 billion, above and below the Issuer's then current Market Cap.

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January 05, 2026 Filed Jan 6, 2026 19:36 UTC GrantCommon Stock 57.6704 $11.56 $666.67
Disclosure

SEC source: 0000354963-26-000014 · form4.xml · nonDerivative · entry 1

SCHULTZ LEIGH ANN · CIK 0001680184 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,170.9685

F1 · kind: Shares received in lieu of director fees.

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January 05, 2026 Filed Jan 6, 2026 19:28 UTC GrantCommon Stock 43.2526 $11.56 $500.00
Disclosure

SEC source: 0000354963-26-000012 · form4.xml · nonDerivative · entry 1

Rhymes Michael Anthony · CIK 0002031312 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,145.9877

F1 · kind: Shares received in lieu of director fees.

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January 05, 2026 Filed Jan 6, 2026 19:23 UTC GrantCommon Stock 54.0657 $11.56 $625.00
Disclosure

SEC source: 0000354963-26-000010 · form4.xml · nonDerivative · entry 1

QUAGLIO KENNETH L · CIK 0001697225 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,589.0657

F1 · kind: Shares received in lieu of director fees.

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January 05, 2026 Filed Jan 6, 2026 19:17 UTC GrantCommon Stock 43.2526 $11.56 $500.00
Disclosure

SEC source: 0000354963-26-000008 · form4.xml · nonDerivative · entry 1

Koontz Richard L Jr · CIK 0001361555 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 60,639.9906

F1 · kind: Shares received in lieu of director fees.

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January 05, 2026 Filed Jan 6, 2026 19:12 UTC GrantCommon Stock 90.1099 $11.56 $1,041.67
Disclosure

SEC source: 0000354963-26-000006 · form4.xml · nonDerivative · entry 1

Fitzsimmons Tracy · CIK 0001326070 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 45,064.7778

F1 · kind: Shares received in lieu of director fees.

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January 05, 2026 Filed Jan 6, 2026 18:50 UTC GrantCommon 34.6021 $11.56 $400.00
Disclosure

SEC source: 0000354963-26-000004 · form4.xml · nonDerivative · entry 1

Beckett Thomas · CIK 0001490436 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,843.2314

F1 · kind: Shares received in lieu of director fees.

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January 05, 2026 Filed Jan 6, 2026 18:37 UTC GrantCommon Stock 70.6462 $11.56 $816.67
Disclosure

SEC source: 0000354963-26-000002 · form4.xml · nonDerivative · entry 1

BARNES VICTOR CHRISTOPHER · CIK 0001914490 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,302.7702

F1 · kind: Shares received in lieu of director fees.

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December 01, 2025 Filed Dec 1, 2025 21:37 UTC GrantCommon Stock 60.9945 $10.93 $666.67
Disclosure

SEC source: 0000354963-25-000285 · form4.xml · nonDerivative · entry 1

SCHULTZ LEIGH ANN · CIK 0001680184 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,075.2981

F1 · kind: Shares received in lieu of director fees.

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December 01, 2025 Filed Dec 1, 2025 21:31 UTC GrantCommon Stock 45.7457 $10.93 $500.00
Disclosure

SEC source: 0000354963-25-000284 · form4.xml · nonDerivative · entry 1

Rhymes Michael Anthony · CIK 0002031312 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,102.7351

F1 · kind: Shares received in lieu of director fees.

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December 01, 2025 Filed Dec 1, 2025 21:26 UTC GrantCommon Stock 57.1821 $10.93 $625.00
Disclosure

SEC source: 0000354963-25-000283 · form4.xml · nonDerivative · entry 1

QUAGLIO KENNETH L · CIK 0001697225 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,535.2338

F1 · kind: Shares received in lieu of director fees.

Read SEC document
December 01, 2025 Filed Dec 1, 2025 21:21 UTC GrantCommon Stock 45.7457 $10.93 $500.00
Disclosure

SEC source: 0000354963-25-000282 · form4.xml · nonDerivative · entry 1

Koontz Richard L Jr · CIK 0001361555 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 60,007.7354

F1 · kind: Shares received in lieu of director fees.

Read SEC document
December 01, 2025 Filed Dec 1, 2025 21:15 UTC GrantCommon Stock 95.3038 $10.93 $1,041.67
Disclosure

SEC source: 0000354963-25-000281 · form4.xml · nonDerivative · entry 1

Fitzsimmons Tracy · CIK 0001326070 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,974.6679

F1 · kind: Shares received in lieu of director fees.

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December 01, 2025 Filed Dec 1, 2025 21:06 UTC GrantCommon 36.5965 $10.93 $400.00
Disclosure

SEC source: 0000354963-25-000280 · form4.xml · nonDerivative · entry 1

Beckett Thomas · CIK 0001490436 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,808.6293

F1 · kind: Shares received in lieu of director fees.

Read SEC document
December 01, 2025 Filed Dec 1, 2025 20:53 UTC GrantCommon Stock 74.7182 $10.93 $816.67
Disclosure

SEC source: 0000354963-25-000278 · form4.xml · nonDerivative · entry 1

BARNES VICTOR CHRISTOPHER · CIK 0001914490 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,232.124

F1 · kind: Shares received in lieu of director fees.

Read SEC document
November 03, 2025 Filed Nov 3, 2025 21:17 UTC GrantCommon Stock 54.1128 $12.32 $666.67
Disclosure

SEC source: 0000354963-25-000276 · form4.xml · nonDerivative · entry 1

SCHULTZ LEIGH ANN · CIK 0001680184 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 26,014.3036

F1 · kind: Shares received in lieu of director fees.

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November 03, 2025 Filed Nov 3, 2025 21:12 UTC GrantCommon Stock 40.5844 $12.32 $500.00
Disclosure

SEC source: 0000354963-25-000275 · form4.xml · nonDerivative · entry 1

Rhymes Michael Anthony · CIK 0002031312 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,056.9894

F1 · kind: Shares received in lieu of director fees.

Read SEC document
November 03, 2025 Filed Nov 3, 2025 21:05 UTC GrantCommon Stock 50.7305 $12.32 $625.00
Disclosure

SEC source: 0000354963-25-000274 · form4.xml · nonDerivative · entry 1

QUAGLIO KENNETH L · CIK 0001697225 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,478.0517

F1 · kind: Shares received in lieu of director fees.

Read SEC document
November 03, 2025 Filed Nov 3, 2025 20:52 UTC GrantCommon Stock 40.5844 $12.32 $500.00
Disclosure

SEC source: 0000354963-25-000273 · form4.xml · nonDerivative · entry 1

Koontz Richard L Jr · CIK 0001361555 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,961.9897

F1 · kind: Shares received in lieu of director fees.

Read SEC document
November 03, 2025 Filed Nov 3, 2025 20:28 UTC GrantCommon 32.4675 $12.32 $400.00
Disclosure

SEC source: 0000354963-25-000271 · form4.xml · nonDerivative · entry 1

Beckett Thomas · CIK 0001490436 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,772.0328

F1 · kind: Shares received in lieu of director fees.

Read SEC document
November 03, 2025 Filed Nov 3, 2025 20:36 UTC GrantCommon Stock 84.5511 $12.32 $1,041.67
Disclosure

SEC source: 0000354963-25-000272 · form4.xml · nonDerivative · entry 1

Fitzsimmons Tracy · CIK 0001326070 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,879.3641

F1 · kind: Shares received in lieu of director fees.

Read SEC document
November 03, 2025 Filed Nov 3, 2025 20:22 UTC GrantCommon Stock 66.2881 $12.32 $816.67
Disclosure

SEC source: 0000354963-25-000269 · form4.xml · nonDerivative · entry 1

BARNES VICTOR CHRISTOPHER · CIK 0001914490 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,157.4058

F1 · kind: Shares received in lieu of director fees.

Read SEC document
October 01, 2025 Filed Oct 1, 2025 21:37 UTC GrantCommon Stock 49.6773 $13.42 $666.67
Disclosure

SEC source: 0000354963-25-000258 · form4.xml · nonDerivative · entry 1

SCHULTZ LEIGH ANN · CIK 0001680184 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,960.1908

F1 · kind: Shares received in lieu of director fees.

Read SEC document
October 01, 2025 Filed Oct 1, 2025 21:36 UTC GrantCommon Stock 37.2578 $13.42 $500.00
Disclosure

SEC source: 0000354963-25-000257 · form4.xml · nonDerivative · entry 1

Rhymes Michael Anthony · CIK 0002031312 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,016.405

F1 · kind: Shares received in lieu of director fees.

Read SEC document
October 01, 2025 Filed Oct 1, 2025 21:32 UTC GrantCommon Stock 46.5723 $13.42 $625.00
Disclosure

SEC source: 0000354963-25-000256 · form4.xml · nonDerivative · entry 1

QUAGLIO KENNETH L · CIK 0001697225 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,427.3212

F1 · kind: Shares received in lieu of director fees.

Read SEC document
October 01, 2025 Filed Oct 1, 2025 21:30 UTC GrantCommon Stock 37.2578 $13.42 $500.00
Disclosure

SEC source: 0000354963-25-000255 · form4.xml · nonDerivative · entry 1

Koontz Richard L Jr · CIK 0001361555 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,921.4053

F1 · kind: Shares received in lieu of director fees.

Read SEC document
October 01, 2025 Filed Oct 1, 2025 21:29 UTC GrantCommon Stock 77.6207 $13.42 $1,041.67
Disclosure

SEC source: 0000354963-25-000254 · form4.xml · nonDerivative · entry 1

Fitzsimmons Tracy · CIK 0001326070 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 44,794.813

F1 · kind: Shares received in lieu of director fees.

Read SEC document
October 01, 2025 Filed Oct 1, 2025 21:27 UTC GrantCommon 29.8063 $13.42 $400.00
Disclosure

SEC source: 0000354963-25-000253 · form4.xml · nonDerivative · entry 1

Beckett Thomas · CIK 0001490436 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,709.759

F1 · kind: Shares received in lieu of director fees.

Read SEC document
October 01, 2025 Filed Oct 1, 2025 21:23 UTC GrantCommon Stock 60.8547 $13.42 $816.67
Disclosure

SEC source: 0000354963-25-000252 · form4.xml · nonDerivative · entry 1

BARNES VICTOR CHRISTOPHER · CIK 0001914490 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 16,091.1177

F1 · kind: Shares received in lieu of director fees.

Read SEC document
September 11, 2025 Filed Sep 12, 2025 20:30 UTC PurchaseCommon Stock 1,803 $13.34 $24,052.74
Disclosure

SEC source: 0001493152-25-013209 · ownership.xml · nonDerivative · entry 2

ECP Fiber Holdings GP, LLC · CIK 0002032452 · 10% owner

ECP Fiber Holdings, LP · CIK 0002032502 · 10% owner

Hill City Holdings GP, LLC · CIK 0002032495 · 10% owner

Hill City Holdings, LP · CIK 0001881388 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,457,105

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.26 to $13.39. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 11, 2025 Filed Sep 12, 2025 20:30 UTC PurchaseCommon Stock 1,803 $13.34 $24,052.74
Disclosure

SEC source: 0001493152-25-013208 · ownership.xml · nonDerivative · entry 2

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

Energy Capital Partners IV, LLC · CIK 0001845291 · 10% owner

Energy Capital Partners GP IV, LP · CIK 0001844921 · 10% owner

ENERGY CAPITAL PARTNERS IV-A, LP · CIK 0001726198 · 10% owner

ENERGY CAPITAL PARTNERS IV-B, LP · CIK 0001726216 · 10% owner

ENERGY CAPITAL PARTNERS IV-C, LP · CIK 0001726217 · 10% owner

ENERGY CAPITAL PARTNERS IV-D, LP · CIK 0001726219 · 10% owner

Energy Capital Partners IV-B (Hill City IP), LP · CIK 0002032499 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,457,105

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.26 to $13.39. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 10, 2025 Filed Sep 12, 2025 20:30 UTC PurchaseCommon Stock 13,541 $13.29 $179,912.50
Disclosure

SEC source: 0001493152-25-013209 · ownership.xml · nonDerivative · entry 1

ECP Fiber Holdings GP, LLC · CIK 0002032452 · 10% owner

ECP Fiber Holdings, LP · CIK 0002032502 · 10% owner

Hill City Holdings GP, LLC · CIK 0002032495 · 10% owner

Hill City Holdings, LP · CIK 0001881388 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,455,302

F1 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.11 to $13.50. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 10, 2025 Filed Sep 12, 2025 20:30 UTC PurchaseCommon Stock 13,541 $13.29 $179,912.50
Disclosure

SEC source: 0001493152-25-013208 · ownership.xml · nonDerivative · entry 1

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

Energy Capital Partners IV, LLC · CIK 0001845291 · 10% owner

Energy Capital Partners GP IV, LP · CIK 0001844921 · 10% owner

ENERGY CAPITAL PARTNERS IV-A, LP · CIK 0001726198 · 10% owner

ENERGY CAPITAL PARTNERS IV-B, LP · CIK 0001726216 · 10% owner

ENERGY CAPITAL PARTNERS IV-C, LP · CIK 0001726217 · 10% owner

ENERGY CAPITAL PARTNERS IV-D, LP · CIK 0001726219 · 10% owner

Energy Capital Partners IV-B (Hill City IP), LP · CIK 0002032499 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,455,302

F1 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.11 to $13.50. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 09, 2025 Filed Sep 10, 2025 20:30 UTC PurchaseCommon Stock 362 $13.39 $4,845.55
Disclosure

SEC source: 0001493152-25-012998 · ownership.xml · nonDerivative · entry 2

ECP Fiber Holdings GP, LLC · CIK 0002032452 · 10% owner

ECP Fiber Holdings, LP · CIK 0002032502 · 10% owner

Hill City Holdings GP, LLC · CIK 0002032495 · 10% owner

Hill City Holdings, LP · CIK 0001881388 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,441,761

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.35 to $13.40. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 09, 2025 Filed Sep 10, 2025 20:30 UTC PurchaseCommon Stock 362 $13.39 $4,845.55
Disclosure

SEC source: 0001493152-25-012999 · ownership.xml · nonDerivative · entry 2

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

Energy Capital Partners IV, LLC · CIK 0001845291 · 10% owner

Energy Capital Partners GP IV, LP · CIK 0001844921 · 10% owner

ENERGY CAPITAL PARTNERS IV-A, LP · CIK 0001726198 · 10% owner

ENERGY CAPITAL PARTNERS IV-B, LP · CIK 0001726216 · 10% owner

ENERGY CAPITAL PARTNERS IV-C, LP · CIK 0001726217 · 10% owner

ENERGY CAPITAL PARTNERS IV-D, LP · CIK 0001726219 · 10% owner

Energy Capital Partners IV-B (Hill City IP), LP · CIK 0002032499 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,441,761

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.35 to $13.40. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 20:30 UTC PurchaseCommon Stock 147 $13.46 $1,979.34
Disclosure

SEC source: 0001493152-25-012998 · ownership.xml · nonDerivative · entry 1

ECP Fiber Holdings GP, LLC · CIK 0002032452 · 10% owner

ECP Fiber Holdings, LP · CIK 0002032502 · 10% owner

Hill City Holdings GP, LLC · CIK 0002032495 · 10% owner

Hill City Holdings, LP · CIK 0001881388 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,441,399

F1 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.45 to $13.4996. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 08, 2025 Filed Sep 10, 2025 20:30 UTC PurchaseCommon Stock 147 $13.46 $1,979.34
Disclosure

SEC source: 0001493152-25-012999 · ownership.xml · nonDerivative · entry 1

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

Energy Capital Partners IV, LLC · CIK 0001845291 · 10% owner

Energy Capital Partners GP IV, LP · CIK 0001844921 · 10% owner

ENERGY CAPITAL PARTNERS IV-A, LP · CIK 0001726198 · 10% owner

ENERGY CAPITAL PARTNERS IV-B, LP · CIK 0001726216 · 10% owner

ENERGY CAPITAL PARTNERS IV-C, LP · CIK 0001726217 · 10% owner

ENERGY CAPITAL PARTNERS IV-D, LP · CIK 0001726219 · 10% owner

Energy Capital Partners IV-B (Hill City IP), LP · CIK 0002032499 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,441,399

F1 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $13.45 to $13.4996. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

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September 05, 2025 Filed Sep 8, 2025 20:30 UTC PurchaseCommon Stock 3,000 $13.45 $40,350.00
Disclosure

SEC source: 0001493152-25-012815 · ownership.xml · nonDerivative · entry 2

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

Energy Capital Partners IV, LLC · CIK 0001845291 · 10% owner

Energy Capital Partners GP IV, LP · CIK 0001844921 · 10% owner

ENERGY CAPITAL PARTNERS IV-A, LP · CIK 0001726198 · 10% owner

ENERGY CAPITAL PARTNERS IV-B, LP · CIK 0001726216 · 10% owner

ENERGY CAPITAL PARTNERS IV-C, LP · CIK 0001726217 · 10% owner

ENERGY CAPITAL PARTNERS IV-D, LP · CIK 0001726219 · 10% owner

Energy Capital Partners IV-B (Hill City IP), LP · CIK 0002032499 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,441,252

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 05, 2025 Filed Sep 8, 2025 20:30 UTC PurchaseCommon Stock 3,000 $13.45 $40,350.00
Disclosure

SEC source: 0001493152-25-012814 · ownership.xml · nonDerivative · entry 2

ECP Fiber Holdings GP, LLC · CIK 0002032452 · 10% owner

ECP Fiber Holdings, LP · CIK 0002032502 · 10% owner

Hill City Holdings GP, LLC · CIK 0002032495 · 10% owner

Hill City Holdings, LP · CIK 0001881388 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,441,252

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 04, 2025 Filed Sep 8, 2025 20:30 UTC PurchaseCommon Stock 2,068 $12.96 $26,798.80
Disclosure

SEC source: 0001493152-25-012815 · ownership.xml · nonDerivative · entry 1

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

Energy Capital Partners IV, LLC · CIK 0001845291 · 10% owner

Energy Capital Partners GP IV, LP · CIK 0001844921 · 10% owner

ENERGY CAPITAL PARTNERS IV-A, LP · CIK 0001726198 · 10% owner

ENERGY CAPITAL PARTNERS IV-B, LP · CIK 0001726216 · 10% owner

ENERGY CAPITAL PARTNERS IV-C, LP · CIK 0001726217 · 10% owner

ENERGY CAPITAL PARTNERS IV-D, LP · CIK 0001726219 · 10% owner

Energy Capital Partners IV-B (Hill City IP), LP · CIK 0002032499 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,438,252

F1 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $12.84 to $13.00. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 04, 2025 Filed Sep 8, 2025 20:30 UTC PurchaseCommon Stock 2,068 $12.96 $26,798.80
Disclosure

SEC source: 0001493152-25-012814 · ownership.xml · nonDerivative · entry 1

ECP Fiber Holdings GP, LLC · CIK 0002032452 · 10% owner

ECP Fiber Holdings, LP · CIK 0002032502 · 10% owner

Hill City Holdings GP, LLC · CIK 0002032495 · 10% owner

Hill City Holdings, LP · CIK 0001881388 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,438,252

F1 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $12.84 to $13.00. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 03, 2025 Filed Sep 4, 2025 20:30 UTC PurchaseCommon Stock 30,000 $12.79 $383,802.00
Disclosure

SEC source: 0001641172-25-026594 · ownership.xml · nonDerivative · entry 2

ECP ControlCo, LLC · CIK 0001707921 · 10% owner

Energy Capital Partners IV, LLC · CIK 0001845291 · 10% owner

Energy Capital Partners GP IV, LP · CIK 0001844921 · 10% owner

ENERGY CAPITAL PARTNERS IV-A, LP · CIK 0001726198 · 10% owner

ENERGY CAPITAL PARTNERS IV-B, LP · CIK 0001726216 · 10% owner

ENERGY CAPITAL PARTNERS IV-C, LP · CIK 0001726217 · 10% owner

ENERGY CAPITAL PARTNERS IV-D, LP · CIK 0001726219 · 10% owner

Energy Capital Partners IV-B (Hill City IP), LP · CIK 0002032499 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,436,184

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $12.67 to $12.9895. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

Read SEC document
September 03, 2025 Filed Sep 4, 2025 20:30 UTC PurchaseCommon Stock 30,000 $12.79 $383,802.00
Disclosure

SEC source: 0001641172-25-026593 · ownership.xml · nonDerivative · entry 2

ECP Fiber Holdings GP, LLC · CIK 0002032452 · 10% owner

ECP Fiber Holdings, LP · CIK 0002032502 · 10% owner

Hill City Holdings GP, LLC · CIK 0002032495 · 10% owner

Hill City Holdings, LP · CIK 0001881388 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnotes

Disclosed balance after: 3,436,184

F4 · price: The price reported in Column 4 is a weighted-average price. These shares were purchased in multiple transactions at prices ranging from $12.67 to $12.9895. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

F2 · ownership.nature: The securities are held of record by Hill City. ECP ControlCo, LLC is the managing member of Energy Capital Partners IV, LLC, which is the general partner of Energy Capital Partners GP IV, LP, which is the general partner of each of (i) Energy Capital Partners IV-A, LP, (ii) Energy Capital Partners IV-B, LP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP (the "Funds"). Energy Capital Partners GP IV, LP is also the general partner of Energy Capital Partners IV-B (Hill City IP), LP ("Hill City IP"). Each of (i) Energy Capital Partners IV-A, LP, (ii) Hill City IP, (iii) Energy Capital Partners IV-C, LP, and (iv) Energy Capital Partners IV-D, LP are the members of Hill City Holdings GP, LLC, which is the general partner of Hill City.

F3 · ownership.nature: ECP ControlCo, LLC is controlled by its board of managers, which consists of Douglas Kimmelman, Peter Labbat, Tyler Reeder, Rahman D'Argenio, Raoul Hughes and Xavier Robert, all of whom collectively share the power to vote and dispose of the securities beneficially owned by ECP ControlCo, LLC. As a result of these relationships, each of the foregoing entities and individuals may be deemed to share beneficial ownership of the securities held of record by Hill City. Each such entity and individual disclaims beneficial ownership of these securities except to the extent of their pecuniary interest therein.

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September 02, 2025 Filed Sep 2, 2025 22:31 UTC GrantCommon Stock 50.3147 $13.25 $666.67
Disclosure

SEC source: 0000354963-25-000242 · form4.xml · nonDerivative · entry 1

SCHULTZ LEIGH ANN · CIK 0001680184 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,910.5135

F1 · kind: Shares received in lieu of director fees.

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September 02, 2025 Filed Sep 2, 2025 22:29 UTC GrantCommon Stock 37.7358 $13.25 $500.00
Disclosure

SEC source: 0000354963-25-000241 · form4.xml · nonDerivative · entry 1

Rhymes Michael Anthony · CIK 0002031312 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,979.1472

F1 · kind: Shares received in lieu of director fees.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.