CION Grosvenor Infrastructure Master Fund announced a quarterly repurchase offer for up to 5% of outstanding shares at net asset value, which was $1,126 per share on September 4. Investors must submit proper requests by October 16, 2026.

CION Grosvenor Infrastructure Master Fund reported annual proxy voting notice information for the 2026 report year, with zero series listed as of June 30, 2026.

CION Grosvenor Infrastructure Master Fund announced a quarterly repurchase offer for up to 5% of outstanding shares at net asset value. Investors must submit requests by 11:59 p.m. Eastern Time on July 17, 2026.

CION Grosvenor Infrastructure Master Fund announced a quarterly repurchase offer for up to 5% of outstanding shares at NAV, with the tender period running from March 13, 2026 through April 17, 2026 and NAV reported at $1,134.25 per share on March 6, 2026. Members who tender shares by the deadline may receive repurchase proceeds within seven calendar days after the pricing date.

The amendment updates beneficial ownership in CION Grosvenor Infrastructure Master Fund, with Commonwealth of Pennsylvania, Public School Employees' Retirement System reporting 262,968.12 shares, or 86.9%, and GCM Diversified Infrastructure reporting 264,289.57 shares, or 87.3%.

CION Grosvenor Infrastructure Master Fund announced a quarterly repurchase offer for up to 5% of its outstanding shares at NAV, with a December 5, 2025 NAV of $1,099.69 per share and a repurchase period ending January 16, 2026. Members must submit requests by 11:59 p.m. Eastern Time on January 16, 2026.

CION Grosvenor Infrastructure Master Fund announced a quarterly repurchase offer for up to 5% of its outstanding shares at NAV, with the repurchase period running from September 12, 2025 to October 17, 2025. Shares tendered before the one-year anniversary of purchase are subject to a 2.00% early repurchase fee.

Commonwealth of Pennsylvania Public School Employees Retirement System and GCM Diversified Infrastructure reported beneficial ownership of 239,452.89 and 240,656.17 Common Shares, respectively, representing 99.95% of CION Grosvenor Infrastructure Master Fund's Common Shares. The disclosure states the securities were held in the ordinary course and not for control purposes.

CION Grosvenor Infrastructure Master Fund, LLC set estimated annual expenses at 4.19% of net assets, or 3.03% after a one-year fee waiver and reimbursement arrangement, based on $375 million of assumed net assets. The Adviser will cap operating expenses at 1.0% during the limitation period, excluding specified expenses.

CION Grosvenor Infrastructure Master Fund registered under the Investment Company Act of 1940 on January 22, 2025, and indicated it is concurrently submitting a registration statement under Section 8(b).