Welcome to our dedicated page for Questar Corporation SEC filings (Ticker: STR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
This page compiles historical SEC filings for Sitio Royalties Corp. (STR), an energy company that focused on oil and gas mineral and royalty interests before its acquisition by Viper Energy, Inc. These documents provide a detailed record of Sitio’s regulatory history, financial reporting and corporate transactions.
Core filings such as annual reports on Form 10-K and quarterly reports on Form 10-Q (referenced in company disclosures) contain information on Sitio’s oil, natural gas and natural gas liquids revenues, lease bonus and other income, production volumes, realized prices, expenses, debt structure and proved reserves. They also describe the company’s mineral and royalty interests across basins including the Delaware, Midland, DJ, Eagle Ford and Williston/Other areas.
Current reports on Form 8-K are particularly important for understanding key events. In 2025, multiple 8-K filings outline the Agreement and Plan of Merger with Viper Energy, Inc., the approval of the merger by Sitio stockholders at a special meeting on August 18, 2025, and the consummation of the mergers on August 19, 2025. One Form 8-K explains the exchange of Sitio Class A common stock for shares of New Viper Class A common stock and notes that Sitio became a wholly owned subsidiary of New Viper.
Filings related to Sitio’s trading status document its transition off the public markets. A Form 25-NSE dated August 21, 2025 records the removal of Sitio’s Class A common stock from listing and registration on the New York Stock Exchange. A subsequent Form 15 dated September 2, 2025 certifies the termination of registration under Section 12(g) of the Exchange Act and the suspension of Sitio’s duty to file periodic reports.
On Stock Titan, these filings are paired with AI-powered summaries that highlight the main points of lengthy documents, helping readers quickly understand topics such as quarterly performance, merger terms, delisting steps and changes in reporting obligations. Users can review Forms 8-K for material events, Forms 10-K and 10-Q for comprehensive financial and operational data, and the Form 25 and Form 15 for the final stages of Sitio’s life as a standalone public company.
Sitio Royalties Corp. reported insider ownership changes tied to its acquisition by New Viper as part of a multi-step merger completed on 08/19/2025. The filing shows Carrie L. Osicka disposed of 409,682 shares of Sitio Class A common stock and 47,208 shares of Class C common stock and saw 276,574 performance stock units converted into 276,574 Class A common stock equivalents before cancelation or conversion under the merger terms. Sitio Opco units vested and were converted into Viper Opco units and New Viper Class B shares based on an exchange ratio of 0.4855. Class C shares were canceled with no consideration. The Form 4 reports only dispositions and conversions under the Merger Agreement and does not reflect open-market sales.
Jarret J. Marcoux, Executive Vice President, Operations of Sitio Royalties Corp. (STR) reported transactions tied to the merger with Viper Energy on 08/19/2025. The Form 4 records dispositions and conversions under the Merger Agreement: 330,176 shares of Sitio Class A common stock and 38,732 shares of Sitio Class C common stock were disposed/canceled, and 38,732 Sitio Opco units were canceled and converted. Performance-based restricted stock units vested and were converted into rights to New Viper Class A common stock equal to 221,999 underlying shares (per the exchange provisions). The filing states these changes result from the all-equity merger and are not open-market sales; following the reported transactions the reporting person shows zero remaining beneficial ownership in the listed Sitio securities.
Sitio Royalties Corp. (STR) completed a merger with New Viper on 08/19/2025. Under the Merger Agreement New Viper acquired Sitio in an all-equity transaction that included two public-company mergers and an Opco merger. The reporting person, James Britton L., recorded transactions tied to that merger: 325,438 shares of Sitio Class A common stock and 36,660 shares of Sitio Class C common stock were disposed, and 36,660 Sitio Opco units were treated and canceled in the merger. Performance-based restricted stock units and restricted stock units vested and were converted into the right to receive New Viper Class A common stock at an exchange ratio of 0.4855 per Sitio share. The Form 4 reports these dispositions and conversions and identifies the reporting person as Executive Vice President of Land.
Sitio Royalties insider Brett S. Riesenfeld reports transactions tied to the June 2, 2025 Merger Agreement consummated on August 19, 2025, under which Sitio was acquired by New Viper in an all-equity transaction.
Per the Form 4, Mr. Riesenfeld had 168,736 Class A shares acquired (from vested performance stock units) and disposed of 284,620 Class A shares and 38,711 Class C shares in connection with the mergers. Sitio performance-based RSUs and Opco units vested, were canceled, and converted into New Viper securities at an exchange ratio of 0.4855. Following the reported transactions, the Form 4 shows 0 beneficially owned Class A and Class C shares for the reporting person.
Sitio Royalties Corp. (STR) insider filing reports the company was acquired and an officer/director's Sitio Class A shares were converted and disposed. The Form 4, filed for reporting person Morris R. Clark, shows that on 08/19/2025 the Merger Agreement with Viper Energy, Inc. and related entities was consummated, resulting in an all-equity acquisition of Sitio by New Viper. As part of the Sitio Pubco Merger, deferred restricted stock units vested in full, were cancelled and converted into New Viper Class A shares at a ratio of 0.4855 per Sitio share. The filing reports the disposition of 51,037 shares of Sitio Class A Common Stock and indicates the reporting person holds 0 shares of Sitio Class A following the transaction. The Form 4 only reports the disposition pursuant to the merger and does not reflect any open-market sales.
John R. Sult, a director of Sitio Royalties Corp. (STR), reported on Form 4 that on 08/19/2025 he disposed of 104,955 shares of the company’s Class A common stock, leaving him with 0 shares beneficially owned for that class. The Form 4 states the disposition was part of the consummation of an all-equity merger under the Agreement and Plan of Merger dated June 2, 2025, in which New Viper acquired Sitio through a series of statutory mergers with Viper Energy entities. Deferred restricted stock units in Sitio vested and were converted into New Viper Class A shares at a conversion ratio of 0.4855 per Sitio share as provided in the merger agreement. The Form 4 was filed by one reporting person and signed by an attorney-in-fact.
Sitio Royalties Corp. director Claire Harvey reported a disposition of all her Class A common shares due to a merger consummated on 08/19/2025. The Form 4 shows Ms. Harvey disposed of 68,675 shares of Sitio Class A common stock in connection with the Agreement and Plan of Merger dated June 2, 2025, by which New Viper acquired Sitio in an all-equity transaction. As part of the Sitio Pubco Merger, deferred restricted stock units for Sitio Class A shares vested, were canceled, and converted into New Viper Class A shares at a ratio of 0.4855 New Viper shares per Sitio share. Following the reported transaction Ms. Harvey beneficially owns 0 shares of Sitio Class A common stock.
Sitio Royalties Corp. director Richard K. Stoneburner reported a disposition of 40,606 shares of Sitio Class A common stock on 08/19/2025 related to the closing of a merger with Viper Energy, Inc. The Form 4 states the company was acquired in an all-equity transaction under an Agreement and Plan of Merger dated June 2, 2025, in which Sitio became a wholly owned subsidiary of New Viper. Following the reported transaction the reporting person shows 0 shares beneficially owned. The filing also notes that deferred restricted stock units vested and were converted into New Viper shares at a conversion ratio of 0.4855 per Sitio Class A share.
Sitio Royalties Corp. (STR) completed a merger with Viper-related entities on 08/19/2025 under an Agreement and Plan of Merger dated 06/02/2025, resulting in New Viper acquiring the company in an all-equity transaction. As a result, director Alice E. Gould (reporting by attorney-in-fact) disposed of 53,529 shares of Sitio Class A common stock and now beneficially owns 0 shares of that class. Deferred restricted stock units fully vested and were cancelled and converted into New Viper Class A shares at a conversion ratio of 0.4855 per Sitio share.
Andrew D. McDavid, Executive Vice President, Corporate Development of Sitio Royalties Corp. (STR), reported transactions on 08/19/2025 that were consummated as part of the merger described in the Agreement and Plan of Merger dated June 2, 2025. The filing shows the reporting person acquired 221,999 Class A shares (reported as acquisition) and disposed of 456,028 Class A shares and disposed of 102,006 Class C shares, resulting in 0 Class A and Class C shares beneficially owned after the transactions. The Form 4 also reports the cancellation and conversion of outstanding performance-based restricted stock units (PSUs) and restricted stock units into New Viper securities under an exchange ratio of 0.4855, and the cancellation of Sitio Opco units in exchange for Viper Opco units and New Viper Class B shares. The Form 4 states the dispositions occurred solely pursuant to the Merger Agreement and does not reflect any open-market sales.
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