S(Social)

Reporting Boundary

Metrics are applied to the following entities, by reporting year,
and cover 100% of domestic and overseas crude steel-producing entities.

- 2023: POSCO, 3 integrated steel mills, 2 re-rolling mills
· POSCO, PT. KRAKATAU POSCO, POSCO YAMATO VINA, POSCO Zhangjiagang Stainless, POSCO-Maharashtra, and POSCO Thainox

- 2024: POSCO, 3 integrated steel mills, 4 re-rolling mills, 4 processing centers
· POSCO, PT. KRAKATAU POSCO, POSCO YAMATO VINA, POSCO Zhangjiagang Stainless, POSCO-Maharashtra, POSCO Thainox,
POSCO-Mexico, POSCO-Vietnam, POSCO-CSPC, POSCO-CFPC, POSCO-MPPC, and POSCO India PC

- 2025: POSCO, 2 integrated steel mills¹⁾, 4 re-rolling mills, 4 processing centers
· POSCO, PT. KRAKATAU POSCO, POSCO YAMATO VINA, POSCO-Maharashtra, POSCO Thainox,
POSCO-Mexico, POSCO-Vietnam, POSCO-CSPC, POSCO-CFPC, POSCO-MPPC, and POSCO India PC

1)Excluded from the consolidated steel segment from 2025 due to the divestment of POSCO Zhangjiagang Stainless Steel.

Workforce Status

Employee Status

Metric	Unit	2023	2024	2025
Number of employees	Person	17,985	17,919	17,643
Number of executive level¹⁾	Person	67	65	65
By gender
Male	Person	63	63	60
Female	Person	4	2	5
Percentage of female	%	6.0	3.1	7.7
By age
Under 30 years old	Person	0	0	0
30~50 years old	Person	0	0	0
Over 50 years old	Person	67	65	65
By Region
Republic of Korea	Person	65	63	62
Asian countries other than Republic of Korea	Person	2	2	3
North America	Person	0	0	0
South America	Person	0	0	0
Europe	Person	0	0	0
Etc	Person	0	0	0
Number of employees excluding executives¹⁾	Person	17,918	17,854	17,578
By gender
Male	Person	16,918	16,841	16,557
Female	Person	1,000	1,013	1,021
Percentage of female	%	5.6	5.7	5.8
By age
Under 30 years old	Person	3,241	3,139	2,902
30~50 years old	Person	7,472	7,873	8,169
Over 50 years old	Person	7,205	6,842	6,507
By Region
Republic of Korea	Person	17,519	17,442	17,235
Asian countries other than Republic of Korea	Person	306	305	253
North America	Person	39	42	36
South America	Person	17	29	21
Europe	Person	25	26	21
Etc	Person	12	10	12
Management Level	Person	4,043	4,094	3,979
By gender
Male	Person	3,972	4,013	3,883
Female	Person	71	81	96
Percentage of female	%	1.8	2.0	2.4

1) Includes both registered and non-registered executives; figures may differ from the "Matters Related to Executives and Employees, etc." section of the Annual Report

Employee Category

Metric	Unit	2023	2024	2025
Permanent employees	Person	16,926	16,784	16,299
By gender
Male	Person	15,970	15,817	15,320
Female	Person	956	967	979
Percentage of female	%	5.7	5.8	6.0
Temporary employees (contractors)	Person	1,052	1,129	1,339
By gender
Male	Person	1,004	1,081	1,292
Female	Person	48	48	47
Percentage of female	%	4.6	4.3	3.5
Percentage of temporary employees (contractors)	%	5.9	6.3	7.6

New Hires and Turnover

Metric	Unit	2023	2024	2025
Total number of total hires	Person	1,511	1,535	1,692
By gender
Male	Person	1,452	1,447	1,630
Female	Person	59	88	62
Percentage of female	%	3.9	5.7	3.7
By age
Under 30 years old	Person	772	943	964
30~50 years old	Person	211	211	180
Over 50 years old	Person	528	381	548
Total employee turnover	Person	1,281	1,476	1,813
Rate of total employee turnover	%	7.1	8.2	10.1
Voluntary employee turnover	Person	348	405	379
By gender
Male	Person	326	375	355
Female	Person	22	30	24
Voluntary employee turnover	%	1.9	2.3	2.1
Non-voluntary employee turnover	Person	933	1,071	1,434
Retirement	Person	519	559	751
Redundancy	Person	0	0	0
Other types of non-voluntary employee turnover	Person	414	512	683

Diversity

Metric	Unit	2023	2024	2025
Employees with disabilities¹⁾	Person	580	651	603
Employees entitled to veterans benefits	Person	705	710	668

1)Based on Article 28-3, Special Provision for Calculating the Number of Employees with Disabilities, of the Act on the Employment Promotion and Vocational Rehabilitation of Persons with Disabilities

Family-friendly System

Metric	Unit	2023	2024	2025
Employees who took Family-friendly system	Person	965	1,064	1,213
Employees who took parental leave¹⁾	Person	260	293	383
By Gender
Male	Person	156	186	285
Female	Person	104	107	98
Number of employees who returned to work after the end of parental leave and have worked for 12 months	Person	120	143	170
By Gender
Male	Person	58	91	120
Female	Person	62	52	50
Employees who took fertility treatment leave	Person	111	109	131
Employees under flexible work program²⁾	Person	7,129	11,618	10,856

1)Employees who used parental leave at least once during the reporting year

2)2023 and 2024 data may differ from the annual report due to aggregation errors in the annual report

Wage

Metric	Unit	2023	2024	2025
Ratio of female employee wage to male employee wage ¹⁾	%	82	85	87

1)Calculated based on average annual total compensation, without considering factors such as job role and years of service; the Company does not differentiate compensation by gender

Labor-Management Relations

Metric	Unit	2023	2024	2025
Percentage of employees covered by collective bargaining agreements	%	100	100	100
Number of lockouts due to strikes	Case	0	0	0

Training

Metric	Unit	2023	2024	2025
Total employee training hours	Hours	1,808,072	1,980,562	1,923,400
By Gender
Male	Hours	-	1,904,813	1,854,253
Female	Hours	-	75,749	69,147
Average hours of training per employee¹⁾	Hours/Person	101	111	109
By Gender
Male	Hours	-	113	112
Female	Hours	-	75	67
By position
Executives	Hours	-	154	130
Managers	Hours	-	125	159
General staff	Hours	-	106	94
Total training expenses	KRW million	31,934	32,500	34,608
Average training expense per employee	KRW million/Person	1.8	1.8	2.0
Employees training on occupational health and safety²⁾	Person	82,366	54,602	59,371
Employees training on information security	Person	17,073	17,260	17,223
Total hours of employee training on information security	Hours	14,228	12,945	12,917

1)Calculated by gender and job level starting from 2024

2)Duplicate counts of completers due to calculation based on mandatory training completion

Human Rights

Metric	Unit	2023	2024	2025
Total training hours of employees on human right education¹⁾	Hour	-	-	2,871
Employees who have undertaken training on human rights¹⁾	Person	-	-	17,223

1)Calculated from 2025 following its designation as mandatory training

Evaluation

Metric	Unit	2023	2024	2025
Number of employees subject to regular performance evaluation	Person	15,663	15,524	15,163
By gender
Male	Person	14,795	14,656	14,270
Female	Person	868	868	893
By contract
Permanent employees	Person	15,492	15,360	15,012
Temporary employees (contractors)	Person	171	164	151

Safety

Metric	Unit	2023	2024¹⁾	2025
Percentage of worksites with OHSMS (ISO 45001/OHSAS 18001/KOSHA-MS) certification²⁾	%	100	100	100
Worksites requring certification	Site	2	2	2
Certified worksites	Site	2	2	2
Total Lost Time Injury Frequency Rate (LTIFR)	Person/1,000,000 hours	0.35	0.84	0.79
Employee LTIFR	Person/1,000,000 hours	0.17	0.97	0.80
Supplier³⁾ LTIFR	Person/1,000,000 hours	0.50	0.72	0.78
Total Lost Time Incident Rate (LTIR)	Person/200,000 hours	0.07	0.17	0.16
Employee LTIR	Person/200,000 hours	0.03	0.19	0.16
Supplier³⁾ LTIR	Person/200,000 hours	0.10	0.14	0.16
Total Recordable Injury Frequency Rate (TRIFR)	Person/1,000,000 hours	1.69	1.81	1.93
Employee TRIFR	Person/1,000,000 hours	1.76	1.96	1.95
Supplier³⁾ TRIFR	Person/1,000,000 hours	1.62	1.65	1.91
Total Recordable Incident Rate (TRIR)	Person/200,000 hours	0.34	0.36	0.39
Employee TRIR	Person/200,000 hours	0.35	0.39	0.39
Supplier³⁾ TRIR	Person/200,000 hours	0.32	0.33	0.38
Total fatality rate per 10,000 people	0/000	0.00	0.00	0.74
Employee	0/000	0.00	0.00	0.00
Suppliers³⁾	0/000	0.00	0.00	1.98
Fatalities
Employee	Person	0	0	0
Suppliers³⁾	Person	0	0	2
Injuries
Employee
Lost Time Injury (LTI) of employees	Cases	6	33	28
Employee LTI	Person	6	34	28
Employee TRI	Person	62	69	68
Injuries by employees	Person	4	26	15
Near miss accidents of employees	Cases	5,939	4,542	2,098
Near Miss Frequency Rate (NMFR) of employees	Cases/200,000 hours	34	26	12
Suppliers³⁾
Supplier LTI	Person	20	26	28
Supplier TRI	Person	65	60	69
Injuries by suppliers	Person	16	23	17
Near miss accidents by suppliers	Cases	402	377	386
Near Miss Frequency Rate (NMFR) of suppliers	Cases/200,000 hours	2	2	2

※Safety data are calculated based on the annual average number of employees and therefore may differ from the total number of employees.

1)Some prior-year disclosed data have been restated due to additional lost-time-related work stoppages

2) Internally defined as worksites subject to the obligation to establish a dedicated organization for serious accident prevention (worksites with 500 or more regular employees)

3)Employees(1person) of Group companies are excluded from contractor employees to prevent double counting

Contribution

Metric	Unit	2023	2024	2025
Hours spent on voluntary work	Hours	398,174	390,081	362,039
Donations	KRW Million	55,128	52,425	59,982

Quality Management Certification

Metric	Unit	2023	2024	2025
Percentage of worksites with QMS (ISO 9001/IATF 16949) certification	%	100	100	100
Worksites requiring QMS (ISO 9001/IATF 16949) certification	Site	2	2	2
Certified worksites with QMS(ISO 9001/IATF 16949)	Site	2	2	2

Supply Chain Management

Metric	Unit	2023	2024	2025
Percentage of suppliers who made an agreement to the Supplier Code of Conduct	%	82	88	91
Number of suppliers who made an agreement to the Supplier Code of Conduct	Count	1,132	1,162	1,220
Number of suppliers	Count	1,380	1,321	1,341

Workforce Status (Domestic & Overseas Worksites)

Employee Status (Domestic & Overseas Worksites)

Metric	Unit	2023			2024			2025
Metric	Unit	POSCO	Integrated Mill	Re-Rolling Mill	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center
Number of employees	Person	17,985	5,030	1,323	17,919	4,982	3,668	17,643	3,292	3,543
Number of executive level¹⁾	Person	67	6	5	65	5	6	65	5	6
By gender
Male	Person	63	6	5	63	5	6	60	5	6
Female	Person	4	0	0	2	0	0	5	0	0
Percentage of female	%	6.0	0.0	0.0	3.1	0.0	0.0	7.7	0	0.0
By age
Under 30 years old	Person	0	0	0	0	0	0	0	0	0
30~50 years old	Person	0	1	2	0	1	3	0	0	1
Over 50 years old	Person	67	5	3	65	4	3	65	5	5
Number of employees excluding executives	Person	17,918	5,024	1,318	17,854	4,977	3,662	17,578	3,287	3,537
By gender
Male	Person	16,918	4,623	1,198	16,841	4,572	3,084	16,557	3,041	2,957
Female	Person	1,000	401	120	1,013	405	578	1,021	246	580
Percentage of female	%	5.6	8.0	9.1	5.7	8.1	15.8	5.8	7.5	16.4
By age
Under 30 years old	Person	3,241	1,270	253	3,139	896	696	2,902	565	590
30~50 years old	Person	7,472	3,502	881	7,873	3,859	2,699	8,169	2,605	2,658
Over 50 years old	Person	7,205	252	184	6,842	222	267	6,507	117	289
Management Level	Person	4,043	411	189	4,094	414	719	3,979	291	688
By gender
Male	Person	3,972	368	170	4,013	369	614	3,883	269	583
Female	Person	71	43	19	81	45	105	96	22	105
Percentage of female	%	1.8	10.5	10.1	2.0	10.9	14.6	2.4	7.6	15.3

1)Includes both registered and non-registered executives

Employee Category (Domestic & Overseas Worksites)

Metric	Unit	2023			2024			2025
Metric	Unit	POSCO	Integrated Mill	Re-Rolling Mill	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center
Permanent employees	Person	16,926	4,636	1,305	16,784	4,528	3,486	16,299	2,902	3,439
By gender
Male	Person	15,970	4,291	1,185	15,817	4,184	2,943	15,320	2,729	2,877
Female	Person	956	345	120	967	344	543	979	173	562
Percentage of female	%	5.6	7.4	9.2	5.8	7.6	15.6	6.0	6.0	16.3
Percentage of permanent employees	%	94.1	92.2	99.0	93.7	90.9	95.2	92.4	88.3	97.2
Temporary employees (contractors)	Person	1,052	394	13	1,129	452	177	1,339	390	100
By gender
Male	Person	1,004	338	13	1,081	391	142	1,292	317	82
Female	Person	48	56	0	48	61	35	47	73	18
Percentage of female	%	4.6	14.2	0.0	4.3	13.5	19.8	3.5	18.7	18.0
Percentage of temporary employees (contractors)	%	5.9	7.8	1.0	6.3	9.1	4.8	7.6	11.9	2.8

New Hires and Turnover (Domestic & Overseas Worksites)

Metric	Unit	2023			2024			2025
Metric	Unit	POSCO	Integrated Mill	Re-Rolling Mill	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center
Total number of total hires	Person	1,511	211	82	1,535	180	273	1,692	235	335
By gender
Male	Person	1,452	182	78	1,447	138	219	1,630	185	286
Female	Person	59	29	4	88	42	54	62	50	49
Percentage of female	%	3.9	13.7	4.9	5.7	23.3	19.8	3.7	21.3	14.6
By age
Under 30 years old	Person	772	117	48	943	122	155	964	146	171
30~50 years old	Person	211	65	30	211	45	114	180	76	158
Over 50 years old	Person	528	29	4	381	13	4	548	13	6
Total employee turnover	Person	1,281	253	70	1,476	237	377	1,813	289	358
Rate of total employee turnover	%	7.1	5.0	5.3	8.2	4.8	10.3	10.1	8.8	10.1
Voluntary employee turnover	Person	348	225	65	405	162	213	379	193	217
By gender
Male	Person	326	198	59	375	138	180	355	169	184
Female	Person	22	27	6	30	24	33	24	24	33
Rate of voluntary employee turnover	%	1.9	4.5	4.9	2.3	3.3	5.8	2.1	5.9	6.1
Non-voluntary employee turnover	Person	933	28	5	1,071	75	164	1,434	96	141
Retirement	Person	519	14	4	559	7	11	751	0	12
Redundancy	Person	0	11	0	0	0	3	0	0	21
Other types of non-voluntary employee turnover	Person	414	3	1	512	68	150	683	96	108

Safety (Domestic & Overseas Worksites)

Metric	Unit	2023			2024			2025
Metric	Unit	POSCO	Integrated Mill	Re-Rolling Mill	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center	POSCO	Integrated Mill	Re-Rolling Mill, Processing Center
Percentage of worksites with OHSMS (ISO 45001/OHSAS 18001/KOSHA-MS) certification²⁾	%	100	100	100	100	100	93	100	100	100
Worksites requring certification	Site	2	3	2	2	3	14	2	2	14
Certified worksites	Site	2	3	2	2	3	13	2	2	14
Total Lost Time Injury Frequency Rate (LTIFR)	Person/1,000,000 hours	0.35	0.12	0.13	0.84	0.19	0.20	0.79	0.05	0.46
Employee LTIFR	Person/1,000,000 hours	0.17	0.09	0.00	0.97	0.27	0.24	0.80	0.14	0.69
Supplier³⁾LTIFR	Person/1,000,000 hours	0.50	0.14	0.26	0.72	0.13	0.14	0.78	0.00	0.15
Total Lost Time Incident Rate (LTIR)	Person/200,000 hours	0.07	0.02	0.03	0.17	0.04	0.04	0.16	0.01	0.09
Employee LTIR	Person/200,000 hours	0.03	0.02	0.00	0.19	0.05	0.05	0.16	0.03	0.14
Supplier³⁾LTIR	Person/200,000 hours	0.10	0.03	0.05	0.14	0.03	0.03	0.16	0.00	0.03
Total Recordable Injury Frequency Rate (TRIFR)	Person/1,000,000 hours	1.69	0.31	0.80	1.81	0.46	1.77	1.93	0.36	1.59
Employee TRIFR	Person/1,000,000 hours	1.76	0.36	0.84	1.96	0.45	2.06	1.95	0.56	2.08
Supplier³⁾TRIFR	Person/1,000,000 hours	1.62	0.28	0.77	1.65	0.46	1.43	1.91	0.24	0.92
Total Recordable Incident Rate (TRIR)	Person/200,000 hours	0.34	0.06	0.16	0.36	0.09	0.35	0.39	0.07	0.32
Employee TRIR	Person/200,000 hours	0.35	0.07	0.17	0.39	0.09	0.41	0.39	0.11	0.42
Supplier³⁾TRIR	Person/200,000 hours	0.32	0.06	0.15	0.33	0.09	0.29	0.38	0.05	0.18
Total fatality rate per 10,000 people	0/000	0.00	0.00	0.00	0.00	0.00	0.00	0.74	0.00	0.00
Employee	0/000	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
Supplier³⁾	0/000	0.00	0.00	0.00	0.00	0.00	0.00	1.98	0.00	0.00
Fatalities
Employee	Person	0	0	0	0	0	0	0	0	0
Supplier³⁾	Person	0	0	0	0	0	0	2	0	0
Injuries
Injuries by employees	Person	4	1	0	26	3	1	15	1	4
Employee LTI	Person	6	1	0	34	3	2	28	1	6
Employee TRI	Person	62	4	3	69	5	17	68	4	18
Injuries by suppliers³⁾	Person	16	2	1	23	2	0	17	0	0
Supplier³⁾LTI	Person	20	2	1	26	2	1	28	0	1
Supplier³⁾ TRI	Person	65	4	3	60	7	10	69	3	6

※ Safety data are calculated based on the annual average number of employees and therefore may differ from the total number of employees.

1) Some prior-year disclosed data have been restated due to additional lost-time-related work stoppages

2)Internally defined as worksites subject to the obligation to establish a dedicated organization for serious accident prevention (worksites with 500 or more regular employees)