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QUARTERLY REPORT
June 2023
• We achieved strong year-on-year growth in aluminium, copper and manganese, setting three annual production records and realising
the benefit of our investments in commodities for a low-carbon future.
• Group copper equivalent production1 increased by 9% in the June 2023 quarter, underpinned by a return to stable operations following
adverse weather and other temporary impacts in the prior quarter.
• FY23 Operating unit costs are expected to be in-line with our previously updated guidance.
• Aluminium production increased by 14% in FY23, as Hillside Aluminium achieved record production and we benefited from our
investments in low-carbon aluminium2 capacity at Mozal Aluminium and Brazil Aluminium.
• Alumina production declined by 4% in FY23 due to temporary outages in the June 2023 quarter. Both refineries have returned to
nameplate production rates and FY24 guidance is unchanged.
• Base metals production increased by 17%3 in FY23 as we embedded the Sierra Gorda copper operation4
in our portfolio, while our Cannington zinc-lead-silver and Cerro Matoso nickel operations achieved revised guidance.
• Australia Manganese and South Africa Manganese achieved annual production records,
delivering a 4% increase in manganese production in FY23.
• Illawarra Metallurgical Coal achieved revised FY23 production guidance, with improved longwall performance delivering a 21% increase
in metallurgical coal production in the June 2023 quarter.
• We advanced study work for our Taylor zinc-lead-silver and Clark battery-grade manganese development options at our Hermosa project,
the first mining project in the United States to be covered by the FAST-41 process.
• Today, we announced an upgrade to the Mineral Resource estimate for the Taylor deposit5, and our best exploration drill results to date
from our Peake copper exploration prospect6.
• We will record a non-cash impairment expense for our Taylor deposit in our FY23 financial results7, reflecting delays from the impact of
COVID-19, significant dewatering requirements and current inflationary market conditions.
South32 Chief Executive Officer, Graham Kerr: “We had a strong finish to the year, with Group copper equivalent production growing 9% in
the quarter. Our strong operating results included record annual production at Hillside Aluminium, Australia Manganese and South Africa
Manganese. Aluminium production increased by 14% and base metals production by 17% in FY23, supported by our recent investments in
commodities critical to a low-carbon future.
“We maintained our disciplined track record of capital allocation, returning a record US$1.2B to shareholders in FY23 while continuing to
invest in our high-quality growth options.
“Significant milestones were achieved at our Hermosa project, as we advanced our Taylor and Clark development options and returned
exciting copper exploration results from our Peake prospect. Hermosa was also confirmed as the first mining project in the United States to
be covered by the FAST-41 process, underlining its potential to strengthen the domestic supply of critical minerals.
“We progressed our greenfield exploration programs, exercising our earn-in right to acquire a 50.1% interest in the
Chita Valley copper exploration project, located in Argentina’s highly prospective San Juan mineral belt.
“Looking forward, we are well placed to continue to capitalise on the global energy transition. We expect to deliver further production growth
in aluminium and base metals in FY24, and our high-quality development options have the potential to further strengthen our long-term
supply of critical minerals.”
Production summary
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 QoQ
Alumina production (kt) 5,288 5,101 (4%) 1,361 1,239 1,249 1%
Aluminium production (kt) 992 1,133 14% 255 279 286 3%
Payable copper production (kt) 25.3 70.7 179% 16.9 15.5 17.3 12%
Payable silver production (koz) 13,199 11,813 (11%) 16.9
2,836 2,479 3,522 42%
Payable lead production (kt) 120.6 101.7 (16%) 25.8 21.0 28.3 35%
Payable zinc production (kt) 64.5 59.2 (8%) 15.4 12.6 16.2 29%
Payable nickel production (kt) 41.7 40.8 (2%) 10.8 10.2 10.2 0%
Metallurgical coal production (kt) 5,712 5,497 (4%) 1,380 1,240 1,504 21%
Manganese ore production (kwmt) 5,432 5,653 4% 1,469 1,261 1,455 15%
Unless otherwise noted: percentage variance relates to performance during the financial year ended June 2023 compared with the financial year ended June 2022 (YoY), or the June 2023 quarter compared
with the March 2023 quarter (QoQ); production and sales volumes are reported on an attributable basis.
CORPORATE UPDATE
Sustainability
• We continue to implement a multi-year Safety Improvement Program that was launched in FY22. The program aims to shift mindsets
through leadership, empower our people, reduce risks with effective controls, and improve systems and metrics. Our investment in
safety leadership includes our ‘Lead Safely Every Day’ program,
which commenced in FY23 and will continue in FY24.
• We continue to advance decarbonisation programs to support our target8 to halve our operational greenhouse gas (GHG) emissions by
2035. Worsley Alumina is on-track to convert its first coal fired boiler to natural gas in the September 2023 quarter, improving energy
security and supporting the refinery’s transition to lower carbon energy.
The boiler conversion is expected to reduce the refinery’s operational GHG emissions by up to ~205,000 tonnes
per annum or ~6% from FY22 levels.
Income statement items
• We expect to report FY23 Operating unit costs in-line with our previously updated guidance.
• As announced today7, we will record a non-cash impairment expense of ~U$1,300M for the Taylor deposit in our FY23 financial results,
resulting in a carrying value of ~US$1,001M for our Hermosa project as at 30 June 2023.
The carrying value of the Clark deposit and our regional exploration land package is unchanged. The impairment expense will be excluded
from FY23 Underlying earnings.
The impairment of the Taylor deposit reflects the impact of delays due to COVID-19, significant dewatering requirements, and current
inflationary pressures. There remains substantial opportunity to unlock additional value across Taylor, Clark and our highly prospective
regional exploration package and that optionality is not included in the impairment assessment.
• FY23 Group Underlying depreciation and amortisation is expected to be ~US$920M, including ~US$125M for our manganese business
and ~US$140M for Sierra Gorda.
• FY23 Group Underlying net finance costs are expected to be ~US$190M.
Cash flow and balance sheet items
• We received net distributions9 of US$173M (South32 share) from our manganese equity accounted investments (EAI) in FY23. This
included net distributions of US$79M in the June 2023 quarter, as both Australia Manganese and
South Africa Manganese increased quarterly sales volumes.
• Our Sierra Gorda EAI invested in plant de-bottlenecking and study work for the operation’s fourth grinding line expansion. We received
net distributions of US$14M from our Sierra Gorda EAI in FY23.
• We received up-front cash proceeds of US$48M and deferred cash instalments of US$27M from our sale of
non-core base metal royalties to Ecora Resources PLC (Ecora Resources) for up to US$200M10.
We made tax payments of US$32M in relation to the sale during FY23 and expect to pay US$16M in H1 FY24.
• FY23 Group safe and reliable and improvement and life extension capital expenditure
(excluding EAIs) is expected to be ~US$545M. Our share of safe and reliable and improvement and life extension capital expenditure for
our EAIs is expected to be ~US$280M.
• We paid a record US$1,007M in fully-franked ordinary and special dividends during FY2311.
We also returned US$218M to shareholders via our on-market share buy-back, purchasing a further 83M shares at an average price of
A$3.97 per share in FY23. Our US$2.3B capital management program is 96% complete with US$83M remaining to be returned ahead of
its extension or expiry on 1 September 202312.
Tax
• The Group made tax payments of US$818M in FY23, including US$115M in relation to our Sierra Gorda acquisition. Of this amount,
~€92M (~US$94M at the payment date) relates to pre-closing tax liabilities for Sierra Gorda which we are seeking to recover from the
vendors13. No further acquisition related tax payments are required.
• Our FY23 Group Underlying effective tax rate (ETR) is expected to be ~36%, reflecting our geographical earnings mix and the corporate
tax rates of the jurisdictions in which we operate14, including recent changes in Colombian tax legislation15. The Colombian tax changes,
which were effective from January 2023, are expected to increase the Group’s Underlying ETR in future periods.
South32 Quarterly Report June 2023 Page 2 of 16
DEVELOPMENT AND EXPLORATION UPDATE
We continue to actively reshape our portfolio, progressing our development and greenfield exploration options to further enhance our
exposure to commodities critical to a low-carbon future.
We invested US$256M of growth capital expenditure at our Hermosa project in FY23, achieving significant milestones. We progressed the
feasibility study for the Taylor zinc-lead-silver deposit, confirmed the potential to produce
battery-grade manganese from our Clark deposit, and installed critical path dewatering infrastructure.
During the June 2023 quarter, Hermosa was confirmed by the US Federal Permitting Improvement Steering Council as the first mining project
to be covered by the FAST-41 process, reflecting its status as currently the only advanced project in the United States with the potential to
supply two federally designated critical minerals, zinc and manganese.
Greenfield exploration continues to play a critical role in our approach to embedding growth options in base metals,
with more than 25 options across our partnerships and own properties. We consolidated our position in the highly prospective San Juan
mineral belt in Argentina during FY23, exercising our earn-in right to acquire a 50.1% interest and operatorship in the Chita Valley copper
exploration project16 and acquiring a 9.9% interest in Aldebaran Resources Inc.17.
Hermosa project – Taylor deposit
• The feasibility study for the Taylor deposit is on-track for H1 FY24, as we align the mine development schedule for a federal permitting
process under FAST-41 and incorporate current market cost estimates.
Feasibility study work to date has validated the potential for a highly productive zinc-lead-silver underground mine and conventional
processing plant with a nameplate processing rate of up to 4.3 million tonnes per annum.
• Today, we released an updated Mineral Resource estimate for the Taylor deposit5 that supports the ongoing feasibility study work. The
Mineral Resource estimate (Table A) has been upgraded to 153Mt,
averaging 3.53% zinc, 3.83% lead and 77g/t silver. The upgrade includes a 41% increase in the Measured Mineral Resource, providing a
compelling base to underpin future production. The deposit remains open in several directions, offering the potential for further growth.
Table A: Mineral Resources for the Taylor deposit as at 30 June 20235
Measured Indicated Inferred Total
Ore Type
Mineral Resources Mineral Resources Mineral Resources Mineral Resources
% % g/t % % g/t % % g/t % % g/t
Mt(b) Zn Pb Ag Mt(b) Zn Pb Ag Mt(b) Zn Pb Ag Mt(b) Zn Pb Ag
UG Sulphide(a) 41 4.22 4.25 67 83 3.38 3.91 76 28 2.96 2.97 93 153 3.53 3.83 77
Million dry metric tonnes(b), % Zn – percent zinc, % Pb – percent lead, g/t Ag – grams per tonne of silver.
Notes:
a) Cut-off grade: NSR of US$80/dmt for UG Sulphide. Input parameters for the NSR calculation are based on South32’s long-term forecasts for zinc, lead and silver pricing;
haulage, treatment, shipping, handling and refining charges. Total metallurgical recovery assumptions differ between geological domains and vary from 85% to 92% for
zinc, 89% to 92% for lead, 76% to 83% for silver.
b) All masses are reported as dry metric tonnes (dmt). All tonnes and grade information have been rounded to reflect relative un certainty of the estimate, hence small
differences may be present in the totals.
Hermosa project – Clark deposit
• We are progressing our Clark battery-grade manganese deposit through three strategic pathways to
de-risk the path to potential production:
o Progressing a single option to produce up to 185ktpa 18 of high-purity manganese sulphate monohydrate (HPMSM) for the North
American market through pre-feasibility and feasibility stages, with initial production from a demonstration plant, prior to a final
investment decision;
o We have commenced pilot scale production to generate HPMSM for product feedback from customers and inform demonstration
plant design. We have approved construction of a decline to provide access to ore to facilitate demonstration scale production,
with construction of the decline expected to be completed by the end of CY25; and
o Engaging with potential customers, including the execution of multiple non-binding, non-exclusive memorandums of
understanding, to assist in our market development, product quality and qualification requirements.
South32 Quarterly Report June 2023 Page 3 of 16
Hermosa project – Exploration
• We directed US$20M to capitalised exploration during FY23, completing multiple exploration programs across Hermosa’s highly
prospective land package.
• Today, we released results from the four most recently completed exploration drill holes at our Peake copper-lead-zinc-silver prospect6,
a lateral zone prospective for copper mineralisation, located south of the Taylor deposit.
• The results include our best intercept at Peake to date, with diamond drill hole HDS-813 returning a downhole intersection of 139m @
1.88% copper, 0.51% lead, 0.34% zinc and 52g/t silver at 2.49% CuEq19
including 58.2m @ 3.1% copper, 0.6% lead, 0.24% zinc, 74g/t silver and 0.015% molybdenum at 3.84% CuEq19.
Further detail is shown in Table B below.
• We consider the results to be supportive of future exploration potential, with the Peake prospect remaining open in several directions.
Further exploration drilling at Peake is planned in H1 FY24.
Table B: Selected Peake drilling results6
From To Width Zinc Lead Copper Molybdenum CuEq19
Hole ID Cut Off Silver (ppm)
(m) (m) (m) (%) (%) (%) (%) (%)
HDS-810 No Significant Intersection
1302.7 1441.7 0.2% Cu 139 0.34 0.51 52 1.88 - 2.49
Including
HDS-813 1315.1 1424 0.2% Cu 109 0.32 0.52 60 2.27 - 2.93
Including
1333.8 1392 0.2% Cu 58.2 0.24 0.6 74 3.1 0.015 3.84
1192.7 1545.6 0.2% Cu 353 0.1 0.2 12.1 0.28 - 0.45
Including
HDS-814
1242.4 1268 0.2% Cu 25.6 0 0 14.3 0.7 - 0.8
1442.3 1476.8 0.2% Cu 34.4 0.5 0.5 17.3 0.35 - 0.78
HDS-815 No Significant Intersection
Cross-section through the Taylor, Clark and Peake mineralisation domains showing the previously reported and new exploration holes,
simplified geology and Taylor Thrust – looking east 2000m wide
South32 Quarterly Report June 2023 Page 4 of 16
Greenfield exploration
• We invested US$42M in our greenfield exploration opportunities during FY23, as we progressed multiple programs targeting base metals
in Australia, USA, Canada, Argentina, Peru and Ireland.
• Following the end of the period, we commenced an inaugural exploration drilling campaign at our 100% owned Roosevelt project in
Alaska, targeting potential copper and zinc mineralisation. The exploration program is scheduled to be completed in H1 FY24.
Other exploration
• We invested US$65M (US$43M capitalised) in exploration programs at our existing operations and development options during FY23,
including US$20M at the Hermosa project (noted above, all capitalised), US$9M at
Ambler Metals (all capitalised), US$2M for our manganese EAI (US$1M capitalised) and US$7M for our Sierra Gorda EAI (US$3M
capitalised).
South32 Quarterly Report June 2023 Page 5 of 16
PRODUCTION SUMMARY
Production guidance
FY22 FY23 FY23e(a) %(b) Comments
(South32 share)
Worsley Alumina
Higher calciner availability in Q4
FY23, partially offset by a
Alumina production (kt) 3,991 3,839 4,000 96%
temporary bauxite conveyor
outage
Brazil Alumina (non-operated)
Temporary port infrastructure
Alumina production (kt) 1,297 1,262 1,340 94% outage and maintenance in Q4
FY23
Brazil Aluminium (non-operated)
Slower than expected
Aluminium production (kt) 0.3 68.9 75 92%
ramp-up of the smelter
Hillside Aluminium20
Achieved record annual
Aluminium production (kt) 714 719 720 100% production despite elevated
load-shedding
Mozal Aluminium20, 21
Recovery plan delivered
Aluminium production (kt) 278 345 340 101%
as expected in Q4 FY23
Sierra Gorda (non-operated)
Payable copper equivalent production22 (kt) 30.6 86.2 89.0 97%
Payable copper production (kt) 25.3 70.7 71.8 98% Stronger copper production in Q4
Payable molybdenum production (kt) 0.4 1.2 1.5 80% FY23, offset by lower
Payable gold production (koz) 9.6 28.8 29.9 96% molybdenum output
Payable silver production (koz) 253 630 582 108%
Cannington
Payable zinc equivalent production23 (kt) 224.2 195.6 195.9 100%
Payable silver production (koz) 12,946 11,183 11,000 102% Recovered from weather impacts
Payable lead production (kt) 120.6 101.7 102.0 100% in Q3 FY23
Payable zinc production (kt) 64.5 59.2 60.5 98%
Cerro Matoso
Resumed access to
Payable nickel production (kt) 41.7 40.8 40.5 101%
higher-grade Q&P deposit
Illawarra Metallurgical Coal
Total coal production (kt) 6,509 6,520 6,500 100%
Achieved improved longwall
Metallurgical coal production (kt) 5,712 5,497 5,500 100%
performance at Appin
Energy coal production (kt) 797 1,023 1,000 102%
Australia Manganese
Achieved record annual
Manganese ore production (kwmt) 3,363 3,545 3,500 101%
production
South Africa Manganese
Achieved record annual
Manganese ore production (kwmt) 2,069 2,108 2,000 105%
production
a. The denotation (e) refers to an estimate or forecast year.
b. Reflects percentage of achieved production for FY23 compared to current FY23e.
South32 Quarterly Report June 2023 Page 6 of 16
MARKETING UPDATE
Commodity prices were broadly lower in FY23 as we saw a moderation in demand and sentiment following record conditions for many
markets in the prior period.
We delivered strong sales performance in the June 2023 quarter, supporting a drawdown in inventory prior to the end of the period. We
expect to record an unwind in working capital in H2 FY23, offsetting the working capital build experienced in H1 FY23 (H1 FY23: US$152M
build).
The average realised prices achieved for our commodities are summarised below. Outstanding concentrate sales were revalued at 30 June
2023 with the final price of these to be determined in the December 2023 half year.
FY23 2H23
Realised prices24 FY22 1H23 2H23 FY23 vs vs
FY22 1H23
Worsley Alumina
Alumina (US$/t) 409 354 360 357 (13%) 2%
Brazil Alumina (non-operated)(a)
Alumina (US$/t) 403 364 374 369 (8%) 3%
Brazil Aluminium (non-operated)(a)
Aluminium (US$/t) - 2,423 2,464 2,452 N/A 2%
Hillside Aluminium
Aluminium (US$/t) 3,161 2,555 2,518 2,535 (20%) (1%)
Mozal Aluminium
Aluminium (US$/t) 3,348 2,723 2,573 2,653 (21%) (6%)
Sierra Gorda (non-operated)25(a)(b)
Payable copper (US$/lb) 3.50 3.41 3.63 3.51 0% 6%
Payable molybdenum (US$/lb) 18.48 20.78 22.11 21.28 15% 6%
Payable gold (US$/oz) 1,934 1,688 1,971 1,821 (6%) 17%
Payable silver (US$/oz) 23.5 17.4 27.2 21.9 (7%) 56%
Cannington25
Payable silver (US$/oz) 21.0 20.1 22.1 21.1 0% 10%
Payable lead (US$/t) 2,046 2,008 1,824 1,919 (6%) (9%)
Payable zinc (US$/t) 3,248 2,436 1,895 2,151 (34%) (22%)
Cerro Matoso26
Payable nickel (US$/lb) 10.08 9.05 6.54 7.76 (23%) (28%)
Illawarra Metallurgical Coal
Metallurgical coal (US$/t) 381 268 289 279 (27%) 8%
Energy coal (US$/t) 156 164 122 144 (8%) (26%)
Australia Manganese27
Manganese ore (US$/dmtu, FOB) 5.29 4.57 4.62 4.59 (13%) 1%
South Africa Manganese27
Manganese ore (US$/dmtu, FOB) 3.92 3.57 3.59 3.58 (9%) 1%
a. While Brazil Alumina and Brazil Aluminium are non-operated, South32 owns the marketing rights for our share of production. While Sierra Gorda is also non-operated, the
Joint Venture is responsible for marketing our share of production.
b. Published FY22 realised sales prices and Operating unit costs reflect the period 1 March 2022 to 30 June 2022. Whereas production and sales numbers, and all Income
Statement items reflect the period from first ownership (22 February 2022).
South32 Quarterly Report June 2023 Page 7 of 16
WORSLEY ALUMINA (86% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Alumina production (kt) 3,991 3,839 (4%) 1,030 905 1,012 (2%) 12%
Alumina sales (kt) 3,974 3,817 (4%) 1,118 845 1,111 (1%) 31%
Worsley Alumina saleable production decreased by 4% (or 152kt), from record levels in FY22, to 3,839kt in FY23.
Saleable production increased by 12% (or 107kt) to 1,012kt in the June 2023 quarter as improved calciner availability supported above
nameplate production rates (4.6Mtpa, 100% basis), partially offset by a temporary bauxite conveyor outage. FY24 production guidance is
unchanged at 4,000kt.
Sales increased by 31% in the June 2023 quarter with a carry-over shipment from the prior quarter supporting a drawdown in inventory.
BRAZIL ALUMINA (36% SHARE, NON-OPERATED)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Alumina production (kt) 1,297 1,262 (3%) 331 334 237 (28%) (29%)
Alumina sales (kt) 1,299 1,237 (5%) 367 317 242 (34%) (24%)
Brazil Alumina saleable production decreased by 3% (or 35kt) to 1,262kt in FY23. The refinery reduced output in the
June 2023 quarter to manage bauxite inventories, following a temporary failure of a belt system from the port,
and unplanned maintenance was completed for one of the two bauxite ship unloaders.
The refinery has returned to nameplate production rates and FY24 guidance is unchanged at 1,400kt.
FY23 Operating unit costs are expected to be ~US$365/t, reflecting the impact of lower volumes in H2 FY23.
South32 Quarterly Report June 2023 Page 8 of 16
BRAZIL ALUMINIUM (40% SHARE, NON-OPERATED)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Aluminium production (kt) 0.3 68.9 N/A 0.3 21.6 23.6 N/A 9%
Aluminium sales (kt) - 67.7 N/A - 22.5 25.8 N/A 15%
Brazil Aluminium saleable production was 68.9kt in FY23 following the restart of all three potlines at the smelter. Production increased by
9% (or 2.0kt) to 23.6kt in the June 2023 quarter, which was below plan, as lower overhead crane availability impacted pot restart activities
and metal production. As a result, fewer pots are in operation than planned, and we expect a delayed ramp-up to nameplate capacity. We
have reduced guidance for our share of
FY24 production to 100kt (from 148kt) and expect to provide a revised timeline for achieving nameplate capacity (179ktpa, our 40% share)
with our FY23 financial results announcement.
We expect to report sequentially lower Operating unit costs in H2 FY23 (H1 FY23: US$5,876/t) with FY23 Operating unit costs expected to be
~US$4,350/t, ahead of the smelter’s ramp-up to nameplate capacity.
HILLSIDE ALUMINIUM (100% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Aluminium production (kt) 714 719 1% 179 177 180 1% 2%
Aluminium sales (kt) 713 719 1% 198 197 185 (7%) (6%)
Hillside Aluminium saleable production increased by 1% (or 5kt) to a record 719kt in FY23 as the smelter continued to test its maximum
technical capacity despite the impact of elevated load-shedding. FY24 production guidance is unchanged at 720kt20.
MOZAL ALUMINIUM (63.7%21 SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Aluminium production (kt) 278 345 24% 76 81 82 8% 1%
Aluminium sales (kt) 276 334 21% 88 43 114 30% 165%
Mozal Aluminium saleable production increased by 24% (or 67kt) to 345kt in FY23, reflecting our increased ownership share21. The smelter
continued to implement its recovery plan, delivering production of 82kt in the June 2023 quarter, exceeding revised production guidance.
Nameplate production rates are expected to be achieved in the December 2023 quarter, with FY24 production guidance revised to 365kt20.
Sales volumes increased by 165% (or 71kt) to 114kt in the June 2023 quarter as production returned to 100% LME-grade quality by the end
of the period and we sold all below specification material produced in the prior quarter, at a modest discount to our other LME-linked
aluminium sales.
South32 Quarterly Report June 2023 Page 9 of 16
SIERRA GORDA (45% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Payable copper equivalent production22 (kt) 30.6 86.2 182% 20.3 19.0 22.3 10% 17%
Payable copper production (kt) 25.3 70.7 179% 16.9 15.5 17.3 2% 12%
Payable copper sales (kt) 27.7 71.8 159% 16.6 15.4 18.0 8% 17%
Sierra Gorda payable copper equivalent production22 was 86.2kt in FY23, or 97% of FY23 guidance,
with molybdenum output below plan. The operation delivered a strong finish to the year, increasing payable copper equivalent production
by 17% to 22.3kt in the June 2023 quarter with improved plant availability.
The operation’s plant de-bottlenecking project is on-track to support an increase in plant throughput to ~48 to 49Mtpa (100% basis), as
reflected in our unchanged FY24 guidance of 87.5kt payable copper equivalent production.
Feasibility study work for the fourth grinding line is ongoing, with the expansion supporting a potential further uplift in plant throughput to
57 to 58Mtpa (100% basis).
CANNINGTON (100% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Payable zinc equivalent production23 (kt) 224.2 195.6 (13%) 48.9 41.0 55.8 14% 36%
Payable silver production (koz) 12,946 11,183 (14%) 2,668 2,341 3,368 26% 44%
Payable silver sales (koz) 12,898 10,739 (17%) 3,362 2,412 3,244 (4%) 34%
Payable lead production (kt) 120.6 101.7 (16%) 25.8 21.0 28.3 10% 35%
Payable lead sales (kt) 122.2 99.0 (19%) 31.0 21.7 26.0 (16%) 20%
Payable zinc production (kt) 64.5 59.2 (8%) 15.4 12.6 16.2 5% 29%
Payable zinc sales (kt) 66.2 58.1 (12%) 16.1 8.8 21.8 35% 148%
Cannington payable zinc equivalent production23 was 195.6kt in FY23, in-line with revised guidance.
The operation successfully recovered from severe wet weather impacts in the March 2023 quarter,
increasing payable zinc equivalent production by 36% (or 14.8kt) to 55.8kt in the June 2023 quarter. FY24 guidance is unchanged at 215.3kt
payable zinc equivalent production (silver 12,500koz, lead 115.0kt and zinc 62.0kt).
Payable zinc sales increased by 148% in the June 2023 quarter, as logistics recovered from widespread flooding in the March 2023 quarter,
supporting a drawdown in inventory.
South32 Quarterly Report June 2023 Page 10 of 16
CERRO MATOSO (99.9% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Payable nickel production (kt) 41.7 40.8 (2%) 10.8 10.2 10.2 (6%) 0%
Payable nickel sales (kt) 41.8 40.8 (2%) 11.9 10.6 10.4 (13%) (2%)
Cerro Matoso payable nickel production was 40.8kt in FY23, in-line with revised guidance, as truck haulage from the higher-grade Q&P pit
resumed in the June 2023 quarter.
Looking forward, we expect nickel production guidance in FY24 to be largely unchanged at 40.5kt, with the benefits of the Ore Sorting and
Mechanical Ore Concentration project partially offset by additional plant maintenance.
Sales decreased by 2% in the June 2023 quarter. Price realisations for our ferronickel product remain dislocated from the LME Nickel Index
due to market dynamics, as reflected in our realised price for nickel sales of US$7.76/lb in FY23.
ILLAWARRA METALLURGICAL COAL (100% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Total coal production (kt) 6,509 6,520 0% 1,583 1,436 1,753 11% 22%
Total coal sales (kt)28 6,606 6,359 (4%) 1,886 1,477 1,697 (10%) 15%
Metallurgical coal production (kt) 5,712 5,497 (4%) 1,380 1,240 1,504 9% 21%
Metallurgical coal sales (kt) 5,823 5,402 (7%) 1,588 1,195 1,529 (4%) 28%
Energy coal production (kt) 797 1,023 28% 203 196 249 23% 27%
Energy coal sales (kt) 783 957 22% 298 282 168 (44%) (40%)
Illawarra Metallurgical Coal saleable production was 6.5Mt in FY23, in-line with revised guidance.
Saleable production increased by 22% (or 317kt) to 1.75Mt in the June 2023 quarter, as the operation delivered improved longwall
performance at Appin, and completed a planned longwall move at Dendrobium.
FY24 production guidance is currently unchanged at 5.3Mt, with two longwall moves planned at both Appin and Dendrobium during the
year. Commencement of the next longwall at Dendrobium, scheduled in Q1 FY24, remains subject to regulatory approvals. If the necessary
approvals are delayed, this would impact production volumes from Dendrobium in FY24. We will provide an update with our FY23 financial
results announcement.
Metallurgical coal sales increased by 28% in the June 2023 quarter, as we optimised our sales mix and achieved improved product availability.
South32 Quarterly Report June 2023 Page 11 of 16
AUSTRALIA MANGANESE (60% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Manganese ore production (kwmt) 3,363 3,545 5% 844 832 869 3% 4%
Manganese ore sales (kwmt) 3,372 3,261 (3%) 860 743 866 1% 17%
Australia Manganese saleable production increased by 5% (or 182kwmt) to a record of 3,545kwmt in FY23,
as improved yields supported higher primary concentrator output. Separately, our low-cost PC02 circuit continued to operate above its
design capacity, delivering ~11% of production (FY22: 11%).
Sales increased by 17% in the June 2023 quarter as we benefitted from improved road haulage capacity and implemented alternative shipping
solutions. This is expected to support a further drawdown in inventory in the September 2023 quarter.
The operation’s strong performance is expected to result in FY23 Operating unit costs being ~5% below FY23 guidance of US$1.97/dmtu.
Looking forward, FY24 Operating unit costs are expected to be in a range of ~US$2.20/dmtu to ~US$2.25/dmtu, reflecting a higher planned
strip ratio and increased haul lengths.
SOUTH AFRICA MANGANESE (ORE 54.6% SHARE)
4Q23 4Q23
South32 share FY22 FY23 YoY 4Q22 3Q23 4Q23 vs vs
4Q22 3Q23
Manganese ore production (kwmt) 2,069 2,108 2% 625 429 586 (6%) 37%
Manganese ore sales (kwmt) 2,170 2,065 (5%) 581 492 541 (7%) 10%
South Africa Manganese saleable production increased by 2% (or 39kwmt) to a record of 2,108kwmt in FY23,
exceeding guidance by 5%. The operation delivered a strong finish to the year, increasing saleable production by
37% (or 157kwmt) to 586kwmt in the June 2023 quarter, including higher volumes of premium material from the Mamatwan mine.
Sales increased by 10% in the June 2023 quarter with improved third-party truck and rail availability,
partially offset by loading delays at port due to wet weather.
South32 Quarterly Report June 2023 Page 12 of 16
NOTES
1. Group payable copper equivalent production in Q4 FY23, compared to Q3 FY23, calculated by applying FY22 realised prices for all operations
(except for Brazil Aluminium which is based on FY22 average index prices for aluminium).
2. Refers to aluminium produced using renewable power.
3. Copper equivalent production at our base metals operations (Sierra Gorda, Cannington and Cerro Matoso) in FY23, compared to FY22, calculated by applying FY22 realised
prices.
4. Refer to market release “South32 completes acquisition of 45% interest in Sierra Gorda copper mine” dated 22 February 2022.
5. Mineral Resource Estimate: The information in this announcement that relates to Mineral Resource estimate for Taylor deposit is extracted from the announcement entitled
(Hermosa Project – Mineral Resource Estimate Update and Exploration Results) published on 24 July 2023 and is available to view on www.south32.net. The company confirms
that it is not aware of any new information or data that materially affects the information included in the original market announcement and, that all material assumptions
and technical parameters underpinning the estimates in the relevant market announcement continue to apply and have not materially changed. The company confirms that
the form and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.
6. Peake Prospect Exploration Target: The information in this announcement that relates to Exploration Results for Peake prospect is extracted from the announcement entitled
(Hermosa Project – Mineral Resource Estimate Update and Exploration Results) published on 24 July 2023 and is available to view on www.south32.net. The company confirms
that it is not aware of any new information or data that materially affects the information included in the original market announcement. The company confirms that the form
and context in which the Competent Person’s findings are presented have not been materially modified from the original market announcement.
7. Refer to market release “Hermosa Project Non-Cash Impairment” dated 24 July 2023.
8. Target is defined as an intended outcome in relation to which we have identified one or more pathways for delivery of that ou tcome, subject to certain assumptions or
conditions. Our medium-term target is to halve our operational greenhouse gas (GHG) emissions by 2035 compared to our FY21 baseline. FY21 baseline adjusted to exclude
GHG emissions from South Africa Energy Coal and TEMCO, which were divested in FY21.
9. Net distributions from our material equity accounted investments (EAI) (manganese and Sierra Gorda) includes dividends and net repayments/drawdowns of shareholder
loans, which are unaudited and should not be considered as an indication of or alternative to an IFRS measure of profitability, financial performance or liquidity.
10. Refer to market release “South32 unlocks up to US$200M in value from non-core royalty sale” dated 12 July 2022. The sales price included US$103M in cash payments,
US$82M of Ecora Resources PLC (formerly known as Anglo Pacific Group PLC) shares issued on completion and contingent payments of up to US$15M. The cash payment
comprises US$48M paid on completion, and US$55M payable in six equal quarterly instalments over the 18 months from completion (US$28M will be received across FY24).
The contingent payment is triggered if the West Musgrave project achieves commercial production, and throughput and commodity price-related conditions are met prior to
an agreed expiry date.
11. Comprised of US$784M in respect of the June 2022 half year returned in the December 2022 quarter and US$223M in respect of the December 2022 half year returned in the
June 2023 quarter.
12. Since inception, US$1.7B has been allocated to the on-market share buy-back (778M shares at an average price of A$3.04 per share)
and US$525M returned in the form of special dividends.
13. Tax payments of US$115M have been made to the Dutch tax authorities and Australian Taxation Office in FY23.
14. The corporate tax rates of the geographies where the Group operates include: Australia 30%, South Africa 27%, Colombia 35%, Mozambique 0%, Brazil 34% and Chile 27%.
The South African corporate tax rate reduced from 28% to 27% from 1 July 2022. The Mozambique operations are subject to a royalty on revenues instead of income tax.
Sierra Gorda is subject to a royalty related tax based on the amount of copper sold and the mining operating margin, the rate is between 5% and 14% for annual sales over
50kt of refined copper. This royalty is included in tax expense.
15. From 1 January 2023 the Colombian dividend withholding tax has increased from 10% to 20% and income tax deductions are no lon ger available for royalty payments. Cerro
Matoso is subject to a royalty related tax equal to 13.5% of mine gate value which is included in operating cost.
16. The transaction is expected to be completed in the March 2024 quarter.
17. South32 paid US$8M on completion of the transaction. Aldebaran Resources Inc.’s key asset is an option to acquire a controlling interest in the Altar copper project in San
Juan, Argentina.
18. Refer to market release “Hermosa Project Update” dated 9 May 2023.
19. Percentage copper equivalent (% CuEq) accounts for combined value of Cu, Zn, Pb and Ag. Metals are converted to % CuEq via unit value calculations using long-term consensus
metal price assumptions and relative metallurgical recovery assumptions. Total metallurgical recoveries differ between geological domains and vary from 85% to 92% for Zn,
89% to 92% for Pb, 76% to 83% for Ag and 80% for Cu. Average payable metallurgical recovery assumptions are Zn 90%, Pb 91%, Ag 81% and 80% for Cu. Metals pricing
assumptions are South32’s long-term consensus prices as at the April 2023 quarter. The formula used for calculation of copper equivalent is CuEq (%) = Cu (% ) + 0.3965*Zn
(%) + 0.2331 * Pb (%) + 0.0068 * Ag (g/t).
20. Production guidance for Hillside Aluminium and Mozal Aluminium does not assume any load-shedding impact on production.
21. Refer to market release “South32 completes acquisition of additional shareholding in Mozal Aluminium” dated 31 May 2022. Historical production and sales figures have not
been restated for our increased ownership (presented on a 47.1% basis to 31 May 2022).
22. Payable copper equivalent production (kt) was calculated by aggregating revenues from payable copper, molybdenum, gold and silver, and dividing the total Revenue by the
price of copper. FY22 realised prices for copper (US$3.50/lb), molybdenum (US$18.48/lb), gold (US$1,934/oz) and silver (US$23.5/oz) have been used for FY22, FY23, FY23e
and FY24e.
23. Payable zinc equivalent production (kt) was calculated by aggregating revenues from payable silver, lead and zinc, and dividing the total Revenue by the price of zinc. FY22
realised prices for zinc (US$3,248/t), lead (US$2,046/t) and silver (US$21.0/oz) have been used for FY22, FY23, FY23e and FY24e.
24. Realised prices are unaudited. Volumes and prices do not include any third party trading that may be undertaken independently of equity production. Realised sales price is
calculated as sales Revenue divided by sales volume unless otherwise stated.
25. Realised prices for Sierra Gorda and Cannington are net of treatment and refining charges.
26. Realised nickel sales prices are inclusive of by-products.
27. Realised ore prices are calculated as external sales Revenue less freight and marketing costs, divided by external sales volume.
28. Illawarra Metallurgical Coal sales are adjusted for moisture and will not reconcile directly to Illawarra Metallurgical Coal production.
The following abbreviations have been used throughout this report: US$ million (US$M); US$ billion (US$B); grams per tonne (g/t); tonnes (t);
thousand tonnes (kt); thousand tonnes per annum (ktpa); million tonnes (Mt); million tonnes per annum (Mtpa); ounces (oz); thousand ounces (koz);
million ounces (Moz); thousand wet metric tonnes (kwmt); million wet metric tonnes (Mwmt); million wet metric tonnes per annu m (Mwmt pa); dry metric tonne unit (dmtu);
thousand dry metric tonnes (kdmt).
Figures in Italics indicate that an adjustment has been made since the figures were previously reported. The denotation (e) refers to an estimate or forecast year.
South32 Quarterly Report June 2023 Page 13 of 16
OPERATING PERFORMANCE
South32 share FY22 FY23 4Q22 1Q23 2Q23 3Q23 4Q23
Worsley Alumina (86% share)
Alumina hydrate production (kt) 3,980 3,833 1,014 957 998 921 957
Alumina production (kt) 3,991 3,839 1,030 920 1,002 905 1,012
Alumina sales (kt) 3,974 3,817 1,118 885 976 845 1,111
Brazil Alumina (36% share)
Alumina production (kt) 1,297 1,262 331 337 354 334 237
Alumina sales (kt) 1,299 1,237 367 313 365 317 242
Brazil Aluminium (40% share)
Aluminium production (kt) 0.3 68.9 0.3 8.3 15.4 21.6 23.6
Aluminium sales (kt) - 67.7 - 3.3 16.1 22.5 25.8
Hillside Aluminium (100% share)
Aluminium production (kt) 714 719 179 179 183 177 180
Aluminium sales (kt) 713 719 198 162 175 197 185
Mozal Aluminium (63.7%21 share)
Aluminium production (kt) 278 345 76 92 90 81 82
Aluminium sales (kt) 276 334 88 87 90 43 114
Sierra Gorda (45% share)
Ore mined (Mt) 13.7 26.0 9.0 8.8 6.6 5.1 5.5
Ore processed (Mt) 7.5 21.2 5.2 5.4 5.3 5.1 5.4
Copper ore grade processed (%, Cu) 0.42 0.42 0.40 0.45 0.44 0.40 0.40
Payable copper equivalent production22 (kt) 30.6 86.2 20.3 22.6 22.3 19.0 22.3
Payable copper production (kt) 25.3 70.7 16.9 19.0 18.9 15.5 17.3
Payable copper sales (kt) 27.7 71.8 16.6 19.2 19.2 15.4 18.0
Payable molybdenum production (kt) 0.4 1.2 0.2 0.2 0.2 0.3 0.5
Payable molybdenum sales (kt) 0.6 1.3 0.5 0.3 0.5 0.2 0.3
Payable gold production (koz) 9.6 28.8 7.3 7.8 7.5 6.2 7.3
Payable gold sales (koz) 9.9 29.1 6.9 7.7 7.7 6.4 7.3
Payable silver production (koz) 253 630 168 180 158 138 154
Payable silver sales (koz) 282 639 171 179 166 137 157
South32 Quarterly Report June 2023 Page 14 of 16
South32 share FY22 FY23 4Q22 1Q23 2Q23 3Q23 4Q23
Cannington (100% share)
Ore mined (kwmt) 2,753 2,223 641 639 484 469 631
Ore processed (kdmt) 2,618 2,156 552 518 624 452 562
Silver ore grade processed (g/t, Ag) 180 187 177 179 171 191 210
Lead ore grade processed (%, Pb) 5.4 5.6 5.5 5.6 5.4 5.5 5.8
Zinc ore grade processed (%, Zn) 3.5 3.8 3.8 3.7 3.6 3.8 4.0
Payable zinc equivalent production23 (kt) 224.2 195.6 48.9 46.1 52.7 41.0 55.8
Payable silver production (koz) 12,946 11,183 2,668 2,568 2,906 2,341 3,368
Payable silver sales (koz) 12,898 10,739 3,362 1,704 3,379 2,412 3,244
Payable lead production (kt) 120.6 101.7 25.8 24.6 27.8 21.0 28.3
Payable lead sales (kt) 122.2 99.0 31.0 18.7 32.6 21.7 26.0
Payable zinc production (kt) 64.5 59.2 15.4 14.0 16.4 12.6 16.2
Payable zinc sales (kt) 66.2 58.1 16.1 14.9 12.6 8.8 21.8
Cerro Matoso (99.9% share)
Ore mined (kwmt) 4,867 5,560 1,141 1,332 1,420 1,189 1,619
Ore processed (kdmt) 2,703 2,807 678 666 726 713 702
Ore grade processed (%, Ni) 1.73 1.62 1.71 1.63 1.65 1.58 1.62
Payable nickel production (kt) 41.7 40.8 10.8 9.6 10.8 10.2 10.2
Payable nickel sales (kt) 41.8 40.8 11.9 9.0 10.8 10.6 10.4
Illawarra Metallurgical Coal (100%)
Total coal production (kt) 6,509 6,520 1,583 1,595 1,736 1,436 1,753
Total coal sales28 (kt) 6,606 6,359 1,886 1,390 1,795 1,477 1,697
Metallurgical coal production (kt) 5,712 5,497 1,380 1,270 1,483 1,240 1,504
Metallurgical coal sales (kt) 5,823 5,402 1,588 1,193 1,485 1,195 1,529
Energy coal production (kt) 797 1,023 203 325 253 196 249
Energy coal sales (kt) 783 957 298 197 310 282 168
Australia Manganese (60% share)
Manganese ore production (kwmt) 3,363 3,545 844 898 946 832 869
Manganese ore sales (kwmt) 3,372 3,261 ...
