OceanaGold Confirms Continuity and Extension of Newly Defined Southern High-Grade Zone at Wharekirauponga

VANCOUVER, BC, April 1, 2026 /PRNewswire/ - OceanaGold Corporation (TSX: OGC) (OTCQX: OCANF) ("OceanaGold" or the "Company") announces results from 6 drill holes from the ongoing exploration and resource conversion program at Wharekirauponga, located approximately 10 kilometres ("km") to the north of the Company's Waihi operation in New Zealand. Wharekirauponga Drilling Highlights (estimated true width): 14.9 m @ 16.3 g/t Au from 466.5 m, EG Vein (WKP144B) 5.4 m @ 25.8 g/t Au from 483.4 m, EG Vein (WKP144A) 5.5 m @ 24.1 g/t Au from 623.6 m, EG Vein (WKP124N) 6.4 m @ 19.1 g/t Au from 470.7 m, EG Vein (WKP144C) 5.4 m @ 6.6 g/t Au from 443.5 m, EG HW Veins (WKP144B) 2.5 m @ 10.3 g/t Au from 436.9 m, EG HW Veins (WKP144B) Gerard Bond, President and CEO of OceanaGold, said "Today's drill results from Wharekirauponga continue to demonstrate the upside of this exceptional orebody.

PRNewsWire • Apr 1, 2026

OceanaGold to list on the New York Stock Exchange on April 7, 2026

VANCOUVER, BC , March 31, 2026 /PRNewswire/ - OceanaGold Corporation (TSX: OGC) (OTCQX: OCANF) ("OceanaGold" or the "Company") is pleased to announce that the New York Stock Exchange ("NYSE") has approved the application to list its common shares. OceanaGold expects that the common shares will commence trading on the NYSE at market open on Tuesday, April 7, 2026 under the ticker symbol "OGC".

PRNewsWire • Mar 31, 2026

OceanaGold Files Annual Information Form and Updated Technical Reports for Haile, Macraes and Didipio

VANCOUVER, BC, March 27, 2026 /PRNewswire/ - OceanaGold Corporation (TSX: OGC) (OTCQX: OCANF) ("OceanaGold" or the "Company") announces that it has filed its Annual Information Form, along with updated technical reports prepared in accordance with National Instrument 43 – 101 – Standards of Disclosure for Mineral Projects ("NI 43 – 101") for three of its operations – Haile, Macraes and Didipio, each with an effective date of December 31, 2025. The projected gold production and cost profile outlined in the Technical Reports positions the Company to continue to generate substantial Free Cash Flow at current gold prices.

PRNewsWire • Mar 27, 2026

Headwater Gold Announces Completion of Drilling Campaigns at the Lodestar and TJ Projects, Nevada

Vancouver, British Columbia - TheNewswire - February 23, 2026: Headwater Gold Inc. (CSE: HWG) (OTCQX: HWAUF) (the "Company" or "Headwater") is pleased to announce the completion of drill programs at the Lodestar and TJ projects located in Nevada, United States.  Lodestar drilling was 100% funded by Newmont Corporation (“Newmont”) (NYSE: NEM, ASX: NEM, PNGX: NEM) through an earn-in agreement announced on May 9, 2023.  TJ drilling was 100% funded by OceanaGold Corporation (“OceanaGold”) (TSX: OGC , OTCQX: OCANF ) pursuant to the earn-in agreement announced on October 15, 2025. Highlights:

OceanaGold Corporation (OGC:CA) Q4 2025 Earnings Call Transcript

OceanaGold Corporation (OGC:CA) Q4 2025 Earnings Call Transcript

Seeking Alpha • Feb 19, 2026

OceanaGold Reports Mineral Reserves and Resources for the Year Ended 2025

VANCOUVER, BC, Feb. 18, 2026 /PRNewswire/ - OceanaGold Corporation (TSX: OGC) (OTCQX: OCANF) ("OceanaGold" or the "Company") is pleased to provide its Mineral Reserves and Mineral Resources statement for the year ended December 31, 2025. Highlights Total Mineral Reserves of 5.83 million ounces of gold ("Moz Au") across its four operating assets.

PRNewsWire • Feb 18, 2026

OceanaGold Achieves 2025 Guidance & Delivers Record Free Cash Flow

(All financial figures in United States dollars unless otherwise stated) •       2025 production, AISC † , and capital all in line with Guidance •       Record quarterly and annual financial performance, with $477M of cash and no debt at year end •       2026 Guidance projects 12% 1 increase in production at 7% 1  lower AISC †   •       Dividend tripled and share buyback doubled, for a total capital return up to $432M in 2026 VANCOUVER, BC , Feb. 18, 2026 /PRNewswire/ - OceanaGold Corporation (TSX: OGC) (OTCQX: OCANF) ("OceanaGold" or the "Company") reported its operational and financial results for the three months and year ended  December 31, 2025. The consolidated financial statements and Management's Discussion and Analysis ("MD&A") are available at www.oceanagold.com.

PRNewsWire • Feb 18, 2026

Headwater Gold Mobilizes Geophysical Surveys at Jake Creek Project, Nevada and Provides Update on Exploration Activities

Vancouver, British Columbia - TheNewswire - February 18, 2026: Headwater Gold Inc. (CSE: HWG) (OTCQX: HWAUF) (the "Company" or "Headwater") is pleased to announce that CSAMT resistivity and ground gravity geophysical surveys are underway at its 100%-owned Jake Creek project in Nevada. The surveys are fully funded pursuant to the earn-in agreement with OceanaGold Corporation (“OceanaGold”) (TSX: OGC , OTCQX: OCANF ) (“Oceana”) announced on October 15, 2025. Highlights:

OceanaGold: Entering The Sweet Spot

With record high gold prices, OceanaGold remains a compelling buy. OCANF's new operational leverage at Haile and Macraes, its buyback regime, and the just announced Waihi North permit create multiple catalysts for sustained upside. FY 2026 guidance could see meaningful hikes. Grade-driven production growth and lower AISC position OCANF for outsized profitability.

Seeking Alpha • Jan 30, 2026

OceanaGold Provides Notice of Fourth Quarter and Full Year 2025 Results and Conference Call

VANCOUVER, BC, Jan. 20, 2026 /PRNewswire/ - OceanaGold Corporation (TSX: OGC) (OTCQX: OCANF) ("OceanaGold" or the "Company") will release its operational and financial results for the fourth quarter and year ending December 31, 2025, after market close on Wednesday, February 18, 2026. The results will be made available on the Company's website at www.oceanagold.com.

PRNewsWire • Jan 20, 2026