Exhibit

Exhibit 99.1

1 November 2019

Rio Tinto plc - Transaction in own shares

Rio Tinto plc (the "Company") today announces that on 1 November 2019 it purchased the following number of ordinary shares of 10 pence each in the Company (the “Ordinary Shares”) on the London Stock Exchange from J.P. Morgan Securities plc. These shares will be cancelled.

Ordinary Shares



Date of Purchase	1 November 2019
Number of ordinary shares purchased	15,836
Average price paid (pence)	4042.8877
Highest price paid (pence)	4043.5000
Lowest price paid (pence)	4041.0000

These share purchases form part of the Company's share buy-back programme which is expected to be completed over the period from 28 February 2019 to 28 February 2020, details of which were announced on 20 September 2018.

In respect of this programme, J.P. Morgan Securities plc will make trading decisions in relation to the Company’s Ordinary Shares repurchased under the buy-back programme independently of, and uninfluenced by, the Company for the period from 20 May 2019 to 26 February 2020.

Any such acquisitions will be effected within certain pre-set parameters, and in accordance with the Company’s general authority to repurchase Ordinary Shares, Chapter 12 of the Listing Rules and the provisions of the Market Abuse Regulation 596/2014/EU dealing with buy-back programmes.

Following the cancellation of the Ordinary Shares repurchased, the Company will have 1,261,999,532 Ordinary Shares in issue. To the extent that further Ordinary Shares are repurchased under the programme, these will also be cancelled.

In accordance with the Market Abuse Regulation 596/2014/EU, a full breakdown of the individual trades is detailed below:

Transaction details: Rio Tinto plc ordinary shares of 10 pence each

Issuer name: Rio Tinto plc

LEI: 213800YOEO5OQ72G2R82

Classification: 2.4. Acquisition or disposal of the issuer’s own shares
ISIN: GB0007188757
Intermediary name: J.P. Morgan Securities plc
Intermediary Code: JPMSGB2L
Timezone: GMT
Currency: GBp

Aggregated Information

Date of purchase: 1 November 2019
Number of ordinary shares purchased: 15,836
Volume weighted average price paid per share (pence): 4042.8877

Page 1 of 4



Transaction Date and Time	Volume	Price (GBp)	Trading Venue	Transaction Reference Number
01-Nov-2019 09:51:15	211	4043.5000	XLON	11003110000032448-E0g03OYrYFDt20191101
01-Nov-2019 09:51:15	338	4043.5000	XLON	01003010000032350-E0g03OYrYFDr20191101
01-Nov-2019 09:51:15	66	4043.5000	XLON	11003110000032448-E0g03OYrYFEH20191101
01-Nov-2019 09:51:15	83	4043.5000	XLON	11003110000032448-E0g03OYrYFDw20191101
01-Nov-2019 09:51:15	24	4043.5000	XLON	11003110000032501-E0g03OYrYFEk20191101
01-Nov-2019 09:51:15	50	4043.5000	XLON	11003110000032501-E0g03OYrYFEX20191101
01-Nov-2019 09:51:15	219	4043.5000	XLON	01003010000032470-E0g03OYrYFEO20191101
01-Nov-2019 09:51:15	50	4043.5000	XLON	11003110000032448-E0g03OYrYFEM20191101
01-Nov-2019 09:51:15	64	4043.5000	XLON	01003010000032470-E0g03OYrYFEV20191101
01-Nov-2019 09:51:15	20	4043.5000	XLON	01003010000029303-E0g03OYrYFDh20191101
01-Nov-2019 09:51:15	94	4043.5000	XLON	11003110000029152-E0g03OYrYFDf20191101
01-Nov-2019 09:51:16	8	4043.5000	XLON	11003110000032501-E0g03OYrYFEm20191101
01-Nov-2019 10:20:00	154	4043.5000	XLON	01003010000032927-E0g03OYrYcAa20191101
01-Nov-2019 10:20:00	319	4043.5000	XLON	11003110000032899-E0g03OYrYcAY20191101
01-Nov-2019 10:20:00	166	4043.5000	XLON	11003110000032917-E0g03OYrYcAc20191101
01-Nov-2019 10:20:00	383	4043.5000	XLON	01003010000033106-E0g03OYrYcAe20191101
01-Nov-2019 10:21:24	209	4043.5000	XLON	01003010000037766-E0g03OYrYdGg20191101
01-Nov-2019 10:21:24	83	4043.5000	XLON	01003010000037787-E0g03OYrYdGm20191101
01-Nov-2019 10:21:24	130	4043.5000	XLON	01003010000037766-E0g03OYrYdGi20191101
01-Nov-2019 10:21:24	308	4043.5000	XLON	01003010000037795-E0g03OYrYdGo20191101
01-Nov-2019 10:21:24	308	4043.5000	XLON	11003110000037772-E0g03OYrYdGk20191101
01-Nov-2019 10:21:24	308	4043.5000	XLON	11003110000037805-E0g03OYrYdGq20191101
01-Nov-2019 10:21:24	315	4043.5000	XLON	01003010000037765-E0g03OYrYdGe20191101
01-Nov-2019 10:21:24	10	4042.5000	XLON	01003010000037848-E0g03OYrYdJB20191101
01-Nov-2019 10:21:24	29	4042.5000	XLON	11003110000037848-E0g03OYrYdJD20191101
01-Nov-2019 10:21:24	129	4043.5000	XLON	01003010000037809-E0g03OYrYdGs20191101
01-Nov-2019 10:21:24	310	4043.5000	XLON	01003010000037850-E0g03OYrYdGu20191101
01-Nov-2019 10:21:24	283	4043.5000	XLON	01003010000037765-E0g03OYrYdGb20191101
01-Nov-2019 10:21:24	300	4042.5000	XLON	01003010000037848-E0g03OYrYdJ720191101
01-Nov-2019 10:22:36	309	4041.0000	XLON	01003010000037860-E0g03OYrYe2h20191101
01-Nov-2019 10:24:41	22	4042.5000	XLON	01003010000038223-E0g03OYrYfiX20191101
01-Nov-2019 10:24:41	138	4042.5000	XLON	01003010000038223-E0g03OYrYfiV20191101
01-Nov-2019 10:26:13	151	4042.5000	XLON	11003110000038573-E0g03OYrYgfi20191101
01-Nov-2019 10:26:34	237	4041.0000	XLON	11003110000038481-E0g03OYrYgyn20191101
01-Nov-2019 10:27:25	85	4042.0000	XLON	01003010000038773-E0g03OYrYhe120191101
01-Nov-2019 10:31:51	144	4043.5000	XLON	11003110000039727-E0g03OYrYkje20191101
01-Nov-2019 11:05:52	113	4043.5000	XLON	01003010000040108-E0g03OYrZ9hO20191101
01-Nov-2019 11:05:52	113	4043.5000	XLON	01003010000040298-E0g03OYrZ9hQ20191101
01-Nov-2019 11:05:52	100	4043.5000	XLON	01003010000047025-E0g03OYrZ9iP20191101
01-Nov-2019 11:05:52	150	4043.5000	XLON	01003010000047025-E0g03OYrZ9iL20191101
01-Nov-2019 11:05:52	167	4043.5000	XLON	01003010000047025-E0g03OYrZ9iN20191101
01-Nov-2019 11:05:52	42	4043.5000	XLON	01003010000047025-E0g03OYrZ9iR20191101
01-Nov-2019 11:12:18	96	4043.5000	XLON	11003110000047646-E0g03OYrZDlT20191101
01-Nov-2019 11:12:18	180	4043.5000	XLON	01003010000047655-E0g03OYrZDlX20191101
01-Nov-2019 11:12:18	121	4043.5000	XLON	11003110000047539-E0g03OYrZDlN20191101
01-Nov-2019 11:12:18	93	4043.5000	XLON	11003110000047674-E0g03OYrZDlZ20191101

Page 2 of 4



Transaction Date and Time	Volume	Price (GBp)	Trading Venue	Transaction Reference Number
01-Nov-2019 11:12:18	115	4043.5000	XLON	11003110000047525-E0g03OYrZDlL20191101
01-Nov-2019 11:12:18	64	4043.5000	XLON	01003010000047643-E0g03OYrZDlP20191101
01-Nov-2019 11:12:18	115	4043.5000	XLON	01003010000047655-E0g03OYrZDlV20191101
01-Nov-2019 11:12:18	89	4043.5000	XLON	01003010000047643-E0g03OYrZDlR20191101
01-Nov-2019 11:12:18	140	4043.5000	XLON	11003110000047966-E0g03OYrZDmN20191101
01-Nov-2019 11:12:18	150	4043.5000	XLON	11003110000047966-E0g03OYrZDmL20191101
01-Nov-2019 11:12:18	100	4043.5000	XLON	11003110000047966-E0g03OYrZDmP20191101
01-Nov-2019 11:12:33	244	4043.5000	XLON	11003110000047994-E0g03OYrZE6M20191101
01-Nov-2019 11:12:34	140	4043.5000	XLON	01003010000048035-E0g03OYrZE7Y20191101
01-Nov-2019 11:12:34	110	4043.5000	XLON	01003010000048035-E0g03OYrZE7W20191101
01-Nov-2019 11:12:34	100	4043.5000	XLON	01003010000048035-E0g03OYrZE7U20191101
01-Nov-2019 11:12:35	100	4043.5000	XLON	01003010000048040-E0g03OYrZE8w20191101
01-Nov-2019 11:12:35	150	4043.5000	XLON	01003010000048040-E0g03OYrZE8u20191101
01-Nov-2019 11:13:19	91	4043.5000	XLON	11003110000048082-E0g03OYrZEl920191101
01-Nov-2019 11:13:19	116	4043.5000	XLON	11003110000048111-E0g03OYrZElD20191101
01-Nov-2019 11:13:19	153	4043.5000	XLON	11003110000048082-E0g03OYrZElB20191101
01-Nov-2019 11:18:31	87	4043.5000	XLON	01003010000049048-E0g03OYrZKMR20191101
01-Nov-2019 11:18:31	137	4043.5000	XLON	11003110000049064-E0g03OYrZKMV20191101
01-Nov-2019 11:18:31	53	4043.5000	XLON	11003110000049127-E0g03OYrZKMh20191101
01-Nov-2019 11:18:31	23	4043.5000	XLON	11003110000049089-E0g03OYrZKMb20191101
01-Nov-2019 11:18:31	30	4043.5000	XLON	01003010000049136-E0g03OYrZKMd20191101
01-Nov-2019 11:18:31	25	4043.5000	XLON	11003110000049127-E0g03OYrZKMj20191101
01-Nov-2019 11:18:31	76	4043.5000	XLON	11003110000049051-E0g03OYrZKMT20191101
01-Nov-2019 11:18:31	13	4043.5000	XLON	11003110000049064-E0g03OYrZKMX20191101
01-Nov-2019 11:18:31	247	4043.5000	XLON	01003010000049136-E0g03OYrZKMf20191101
01-Nov-2019 11:18:31	76	4043.5000	XLON	11003110000049128-E0g03OYrZKMl20191101
01-Nov-2019 11:19:11	271	4043.0000	XLON	11003110000049310-E0g03OYrZL1N20191101
01-Nov-2019 11:19:12	4	4042.0000	XLON	11003110000049162-E0g03OYrZL3Q20191101
01-Nov-2019 11:19:12	78	4042.5000	XLON	01003010000049130-E0g03OYrZL2G20191101
01-Nov-2019 11:19:12	88	4042.5000	XLON	11003110000049110-E0g03OYrZL2E20191101
01-Nov-2019 11:19:12	5	4042.5000	XLON	01003010000049137-E0g03OYrZL2I20191101
01-Nov-2019 11:19:12	83	4042.5000	XLON	01003010000049286-E0g03OYrZL2K20191101
01-Nov-2019 11:19:12	200	4042.0000	XLON	11003110000049162-E0g03OYrZL3N20191101
01-Nov-2019 11:21:37	262	4041.0000	XLON	11003110000049516-E0g03OYrZMfK20191101
01-Nov-2019 11:22:37	183	4041.0000	XLON	01003010000049817-E0g03OYrZNQL20191101
01-Nov-2019 11:24:03	162	4041.0000	XLON	01003010000050172-E0g03OYrZODf20191101
01-Nov-2019 11:27:38	70	4042.5000	XLON	01003010000050657-E0g03OYrZQGu20191101
01-Nov-2019 12:15:56	100	4041.0000	XLON	11003110000060275-E0g03OYra1Fw20191101
01-Nov-2019 12:15:59	3198	4042.0000	XLON	01003010000060234-E0g03OYra1Jr20191101
01-Nov-2019 12:16:57	259	4043.5000	XLON	01003010000060314-E0g03OYra1wl20191101
01-Nov-2019 12:16:57	318	4043.5000	XLON	01003010000060281-E0g03OYra1wj20191101
01-Nov-2019 12:16:58	284	4043.5000	XLON	11003110000060425-E0g03OYra1yI20191101
01-Nov-2019 12:17:05	219	4043.0000	XLON	11003110000060439-E0g03OYra21M20191101
01-Nov-2019 12:17:19	76	4042.0000	XLON	01003010000060403-E0g03OYra28a20191101

Page 3 of 4

Contacts

media.enquiries@riotinto.com

riotinto.com

Follow @RioTinto on Twitter



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