History
Rialto Energy became Azonto, then Calima, moving from Australian permits to Africa, Canada's Montney and Alberta oil, before selling everything, returning A$80m and delisting in December 2024.
2006-2010: Small explorer, Australian permits
Rialto Energy listed in June 2006 with a prospectus to issue 8,083,333 shares at 30 cents, raising $2.425 million. Its early plan was to join offshore projects through a venture with Challenger Minerals, which it enlarged from 10% to 25% in 2007 with a 40 cent placement. It held 30% of WA-291-P and half of permit W06-17 in the Carnarvon Basin. A $7.3 million placement followed in 2008.
The Australian assets did not deliver. Tap Oil withdrew from WA-291-P in 2009 and Rialto took the full interest at no cost, but in March 2010 it told the regulator it was withdrawing, after writing off $1,024,232 of exploration costs. Its WA-399-P stake was farmed down, ending at 12% after Apache agreed to fund a seismic survey.
2010-2012: Côte d'Ivoire
In April 2010 Rialto agreed to buy 75% of C&L Natural Resources, which held 85% of the offshore CI-202 block in Côte d'Ivoire, a major shift away from Australia. A A$30.0m placement at 30 cents funded the deal, which completed in July 2010 with Jeff Schrull as Managing Director. A A$55m placement at 70 cents in December 2010 paid for the remaining 25%, completed in June 2011. Shares on issue rose from 43 million in 2008 to 375 million by the end of 2011.
Sanctions on Côte d'Ivoire delayed work in 2011, but the government approved the Gazelle field development plan that December. In 2012 the company raised A$60m at 30 cents, including about US$20m from the IFC, and listed on London's AIM on 12 April 2012. Drilling began in March with Gazelle-P3, which hit a stuck pipe, needed sidetracks and lifted 2012 net costs to US$85m. Gazelle-P4 found a high quality gas reservoir. Petroci backed in for an extra 11%, and the company was granted a 25-year exploitation area.
2012-2013: Funding squeeze and the Vitol deal
The record shows a change of leadership: Schrull stepped down, and Rob Shepherd became Managing Director in February 2013. Funding was the board's priority. A Vitol term sheet in April 2013 offered US$50m of work funding for 65% of the Ivorian company, and the Vantage rig contract was terminated, with the settlement eventually cut to US$11.625m. Ophir's Starfish-1 well in Ghana, in which Rialto held an interest, found no movable hydrocarbons.
A A$14.1m placement at 3 cents issued about 471.6m shares. Full-year results showed a net loss of A$170.6m, mostly a A$150.8m CI-202 impairment. Vitol completed its purchase in November 2013 under a new seven-year production-sharing contract, and the company became Azonto Petroleum that December. Shares on issue reached about 1.16 billion.
2014-2016: Delays, sale and a failed pivot
Gazelle slipped. A May 2014 report put contingent resources at 92 bcf (best case), and sanction was pushed back. The president signed the exploitation authorisation in December 2014, but in 2015 the construction price came in too high and was re-tendered. Shepherd and the finance director resigned, the Accra block in Ghana was relinquished with a A$12.8m impairment booked, and a strategic review began. In August 2015 Azonto sold its 35% of Vioco to Vitol for US$4.0m, with US$2.0m more payable on a discovery, leaving cash of about US$4.8m and ending AIM trading. The board resigned or changed, and Glenn Whiddon became chairman.
A term sheet for Clipfort, a gun-magazine technology business, was signed in April 2016 and terminated in June.
2017-2020: Calima and the Montney
In May 2017 Azonto returned to oil and gas, farming into Canada's Montney project and buying Calima Energy from Havoc. It consolidated shares 1-for-3, raised A$2.25m at 4.5 cents and relisted on ASX as CE1 on 31 August 2017. Land grew to 72,014 acres. In 2018 it took over its partners through all-scrip bids, holding 100% by August, and raised A$25m at 5.4 cents. It also won a Namibian block.
Three wells drilled in early 2019 showed encouraging results, though testing ended early in a spring thaw. A $12.7m raising at 1.8 cents followed, and Namibia was sold to Tullow for US$2m plus up to US$10m of success bonuses. Shares on issue passed 2.1 billion. In 2020 the company bought the Tommy Lakes facilities for about A$750,000, but with no funded partner, the record is otherwise quiet.
2021-2023: Alberta oil
In February 2021 Calima bought Alberta producer Blackspur for C$17m, funded by 5.4 billion shares at 0.7 cents, raising A$37.9m. A 20-to-1 consolidation followed in August 2021. Production reached about 3,800 boe/d, short of a 4,500 target, and a A$20m placement at A$0.20 in 2022 reduced debt and funded wells. In 2023 a Montney re-test beat 2019 results, and an asset sale was called off in June. In August the Montney assets were sold for C$10m, and the capital return was lifted to A$7.5m.
2024: Sale, return and delisting
In January 2024 Calima agreed to sell Blackspur to Astara for C$75m, completed in February with A$81.6m banked. An A$80m return, about 12.63 cents a share, was paid on 21 June. ASX suspended the shares on 2 July. Calima sold its Paradise field business to Aldon for about A$1.3m, and shareholders approved delisting with about 94% support. It was removed from the ASX list on 18 December 2024, having exited all its assets.
Written from the 173 story beats below (2006 to 18 Dec 2024), which come from the company's own announcements and filings.