Adage Capital Partners Amends Mammoth Energy Services Stake

TL;DR

**Adage Capital Partners updated their stake in Mammoth Energy Services.**

AI Summary

Adage Capital Partners, L.P. filed an amended Schedule 13G/A on February 7, 2024, indicating a change in their ownership of Mammoth Energy Services, Inc. common stock as of December 31, 2023. This filing updates their previous disclosures, showing their current stake in the oil and gas field services company. This matters to investors because it provides transparency into significant institutional ownership changes, which can influence stock perception and trading activity.

Why It Matters

Changes in institutional ownership can signal shifts in investor confidence or strategy, potentially impacting the stock's liquidity and market sentiment.

Risk Assessment

Risk Level: low — This filing is a routine update on institutional ownership and does not inherently present new risks to the company or its investors.

Analyst Insight

An investor should note this filing as a routine update on institutional ownership. While not immediately actionable, it's part of the broader picture of who holds the stock. Further analysis would require reviewing the full filing to see the specific changes in share count or percentage owned by Adage Capital Partners, L.P.

Key Players & Entities

• Adage Capital Partners, L.P. (company) — the reporting person filing the SC 13G/A
• Mammoth Energy Services, Inc. (company) — the subject company whose securities are being reported
• December 31, 2023 (date) — the date of the event requiring the filing
• February 7, 2024 (date) — the filing date of the SC 13G/A
• Common Stock, par value $0.01 per share (other) — the class of securities being reported

FAQ

Key Financial Figures

• $0.01 — me of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securitie

Filing Documents

• p24-0332sc13ga.htm (SC 13G/A) — 93KB
• 0000902664-24-001178.txt ( ) — 94KB

(a)

Item 1(a). NAME OF ISSUER The name of the issuer is Mammoth Energy Services, Inc. (the “ Company ”).

(b)

Item 1(b). ADDRESS OF ISSUER’S PRINCIPAL EXECUTIVE OFFICES The Company’s principal executive offices are located at 14201 Caliber Drive, Suite 300, Oklahoma City, Oklahoma 73134.

(a)

Item 2(a). NAME OF PERSON FILING This statement is filed by: (i) Adage Capital Partners, L.P., a Delaware limited partnership (“ ACP ”) with respect to the Common Stock directly owned by it; (ii) Adage Capital Partners GP, L.L.C., a limited liability company organized under the laws of the State of Delaware (“ ACPGP ”), as general partner of ACP with respect to the Common Stock directly owned by ACP; (iii) Adage Capital Management, L.P., a Delaware limited partnership (“ ACM ”), as the investment manager of ACP, with respect to the Common Stock directly owned by ACP; (iv) Robert Atchinson (“ Mr. Atchinson ”), as (1) managing member of Adage Capital Advisors, L.L.C., a limited liability company organized under the laws of the State of Delaware (“ ACA ”), managing member of ACPGP and (2) managing member of Adage Capital Partners LLC, a Delaware limited liability company (“ ACPLLC ”), general partner of ACM, with respect to the Common Stock directly owned by ACP; and (v) Phillip Gross (“ Mr. Gross ”), as (1) managing member of ACA, managing member of ACPGP and (2) managing member of ACPLLC, general partner of ACM, with respect to the Common Stock directly owned by ACP. The foregoing persons are hereinafter sometimes collectively referred to as the “ Reporting Persons .” Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party. The filing of this statement should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of the securities reported herein. CUSIP No. 56155L108 13G/A Page 8 of 10 Pages

(b)

Item 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE The address of the business office of each of the Reporting Persons is 200 Clarendon Street, 52nd Floor, Boston, Massachusetts 02116.

(c)

Item 2(c). CITIZENSHIP ACP and ACM are limited partnerships organized under the laws of the State of Delaware. ACPGP is a limited liability company organized under the laws of the State of Delaware. Messrs. Gross and Atchinson are citizens of the United States.

(d)

Item 2(d). TITLE OF CLASS OF SECURITIES Common Stock, par value $0.01 per share (the “ Common Stock ”).

(e)

Item 2(e). CUSIP NUMBER 56155L108 Item 3. IF THIS STATEMENT IS FILED PURSUANT TO Rules 13d-1(b), OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A: (a) Broker or dealer registered under Section 15 of the Act; (b) Bank as defined in Section 3(a)(6) of the Act; (c) Insurance company as defined in Section 3(a)(19) of the Act; (d) Investment company registered under Section 8 of the Investment Company Act of 1940; (e) An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E); (f) An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F); (g) A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G); (h) A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act; (i) A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act; (j) A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J); (k) Group, in accordance with Rule 13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please specify the type of institution: Not applicable . CUSIP No. 56155L108 13G/A Page 9 of 10 Pages Item 4. The information required by Items 4(a) – (c) is set forth in Rows (5) – (11) of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The percentage set forth in this Schedule 13G/A is calculated based upon 47,941,652 shares of Common Stock outstanding as of November 7, 2023, as reported in the Company's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2023 filed with the Securities and Exchange Commission on November 9, 2023. Item 5. Not applicable. Item 6. Not applicable. Item 7. IDENT

SIGNATURES

SIGNATURES After reasonable inquiry and to the best of his or its knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct. DATE: February 7, 2024 ADAGE CAPITAL PARTNERS, L.P. By: Adage Capital Partners GP, L.L.C., its general partner By: Adage Capital Advisors, L.L.C., its managing member /s/ Robert Atchinson Name: Robert Atchinson Title: Managing Member ADAGE CAPITAL PARTNERS GP, L.L.C. By: Adage Capital Advisors, L.L.C., its managing member /s/ Robert Atchinson Name: Robert Atchinson Title: Managing Member ADAGE CAPITAL MANAGEMENT, L.P. By: Adage Capital Partners LLC, its general partner /s/ Robert Atchinson Name: Robert Atchinson Title: Managing Member /s/ Robert Atchinson ROBERT ATCHINSON, individually /s/ Phillip Gross PHILLIP GROSS, individually

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View this SC 13G/A filing on SEC EDGAR