Exhibit 99.25

26 June 2019

Rio Tinto plc - Transaction in own shares

Rio Tinto plc (the "Company") today announces that on 26 June 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	26 June 2019
Number of ordinary shares purchased	20,646
Average price paid (pence)	4808.2020
Highest price paid (pence)	4827.5000
Lowest price paid (pence)	4782.5000

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 1,269,724,949 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: JPMSGB2LTimezone: BSTCurrency: GBp

Aggregated Information

Date of purchase: 26 June 2019
Number of ordinary shares purchased: 20,646
Volume weighted average price paid per share (pence): 4808.2020

Transaction Date and Time	Volume	Price (GBp)	Trading Venue	Transaction Reference Number
26-Jun-2019 10:24:25	62	4792.0000	XLON	01002010000045323-E0eVCid6qCEA20190626
26-Jun-2019 10:24:25	88	4792.0000	XLON	01002010000045323-E0eVCid6qCED20190626
26-Jun-2019 10:26:41	82	4794.5000	XLON	11002110000046105-E0eVCid6qEkw20190626
26-Jun-2019 10:26:41	82	4794.5000	XLON	11002110000046105-E0eVCid6qEl620190626
26-Jun-2019 10:26:41	49	4794.5000	XLON	11002110000046105-E0eVCid6qEkz20190626
26-Jun-2019 10:29:38	151	4791.0000	XLON	11002110000047251-E0eVCid6qIgK20190626
26-Jun-2019 10:33:07	150	4793.5000	XLON	01002010000048801-E0eVCid6qNgG20190626
26-Jun-2019 10:36:22	157	4794.0000	XLON	11002110000049811-E0eVCid6qRSW20190626
26-Jun-2019 10:39:31	157	4792.0000	XLON	11002110000050687-E0eVCid6qUXZ20190626
26-Jun-2019 10:44:37	158	4795.5000	XLON	01002010000052765-E0eVCid6qaGD20190626
26-Jun-2019 10:49:39	151	4799.5000	XLON	01002010000054385-E0eVCid6qf1Y20190626
26-Jun-2019 10:51:04	150	4804.0000	XLON	01002010000055020-E0eVCid6qgX920190626
26-Jun-2019 10:57:07	150	4811.0000	XLON	11002110000057154-E0eVCid6qmBV20190626
26-Jun-2019 11:01:50	107	4810.0000	XLON	11002110000058752-E0eVCid6qqyW20190626
26-Jun-2019 11:01:50	45	4810.0000	XLON	11002110000058752-E0eVCid6qqyU20190626
26-Jun-2019 11:03:01	164	4808.5000	XLON	01002010000059108-E0eVCid6qryt20190626
26-Jun-2019 11:06:26	151	4808.0000	XLON	01002010000060128-E0eVCid6qudN20190626
26-Jun-2019 11:12:14	129	4803.0000	XLON	11002110000062450-E0eVCid6qzkk20190626
26-Jun-2019 11:12:14	33	4803.0000	XLON	11002110000062450-E0eVCid6qzki20190626
26-Jun-2019 11:16:25	150	4803.0000	XLON	11002110000063825-E0eVCid6r38c20190626
26-Jun-2019 11:16:25	1	4803.0000	XLON	11002110000063825-E0eVCid6r38e20190626
26-Jun-2019 11:18:03	161	4801.5000	XLON	11002110000064401-E0eVCid6r4kX20190626
26-Jun-2019 11:25:05	8	4799.5000	XLON	01002010000066143-E0eVCid6rABZ20190626
26-Jun-2019 11:25:05	155	4799.5000	XLON	01002010000066143-E0eVCid6rABi20190626
26-Jun-2019 11:27:57	159	4799.5000	XLON	01002010000067507-E0eVCid6rCmq20190626
26-Jun-2019 11:32:54	150	4798.0000	XLON	11002110000069276-E0eVCid6rGRu20190626
26-Jun-2019 11:34:29	161	4794.5000	XLON	01002010000069914-E0eVCid6rHXs20190626
26-Jun-2019 11:41:55	64	4794.0000	XLON	11002110000071853-E0eVCid6rNF320190626
26-Jun-2019 11:41:55	86	4794.0000	XLON	11002110000071853-E0eVCid6rNF120190626
26-Jun-2019 11:45:09	158	4792.5000	XLON	11002110000073178-E0eVCid6rR6320190626
26-Jun-2019 11:55:24	160	4794.0000	XLON	11002110000074600-E0eVCid6rYLO20190626
26-Jun-2019 11:57:54	182	4794.0000	XLON	01002010000076590-E0eVCid6raRb20190626
26-Jun-2019 11:59:51	195	4792.5000	XLON	01002010000077232-E0eVCid6rc6120190626
26-Jun-2019 12:06:50	150	4793.5000	XLON	11002110000080062-E0eVCid6rj0B20190626
26-Jun-2019 12:08:49	150	4791.5000	XLON	11002110000080475-E0eVCid6rkqw20190626
26-Jun-2019 12:10:04	92	4791.5000	XLON	11002110000080731-E0eVCid6rlkp20190626
26-Jun-2019 12:10:11	50	4791.5000	XLON	11002110000080731-E0eVCid6rlqE20190626
26-Jun-2019 12:10:11	9	4791.5000	XLON	11002110000080731-E0eVCid6rlqB20190626
26-Jun-2019 12:12:00	160	4790.5000	XLON	11002110000081092-E0eVCid6rn5r20190626
26-Jun-2019 12:14:53	157	4786.5000	XLON	01002010000081697-E0eVCid6rp2920190626
26-Jun-2019 12:19:34	165	4783.5000	XLON	01002010000082899-E0eVCid6rsLU20190626
26-Jun-2019 12:27:09	180	4783.5000	XLON	01002010000085320-E0eVCid6ry7c20190626
26-Jun-2019 12:27:13	65	4782.5000	XLON	11002110000085317-E0eVCid6ryBy20190626
26-Jun-2019 12:27:13	85	4782.5000	XLON	11002110000085317-E0eVCid6ryC020190626
26-Jun-2019 12:32:23	163	4789.0000	XLON	01002010000087257-E0eVCid6s1m020190626
26-Jun-2019 12:33:09	164	4788.5000	XLON	11002110000087949-E0eVCid6s2Rm20190626
26-Jun-2019 12:43:59	155	4796.0000	XLON	11002110000091786-E0eVCid6s9SM20190626
26-Jun-2019 12:51:11	144	4804.5000	XLON	01002010000094782-E0eVCid6sESh20190626
26-Jun-2019 12:51:11	22	4804.5000	XLON	01002010000094782-E0eVCid6sESj20190626
26-Jun-2019 12:53:05	173	4806.5000	XLON	01002010000095482-E0eVCid6sFmK20190626
26-Jun-2019 12:53:05	52	4806.5000	XLON	01002010000095482-E0eVCid6sFmM20190626
26-Jun-2019 12:55:15	69	4805.0000	XLON	01002010000095871-E0eVCid6sH7G20190626
26-Jun-2019 12:58:14	150	4807.0000	XLON	11002110000097290-E0eVCid6sIyO20190626
26-Jun-2019 12:59:26	83	4806.5000	XLON	01002010000097823-E0eVCid6sJpV20190626
26-Jun-2019 13:01:09	155	4808.5000	XLON	11002110000098502-E0eVCid6sLFF20190626
26-Jun-2019 13:04:52	150	4808.0000	XLON	01002010000099592-E0eVCid6sNnq20190626
26-Jun-2019 13:08:31	52	4803.5000	XLON	11002110000100685-E0eVCid6sQSH20190626
26-Jun-2019 13:08:32	98	4803.5000	XLON	11002110000100685-E0eVCid6sQSk20190626
26-Jun-2019 13:13:34	155	4803.0000	XLON	01002010000102734-E0eVCid6sSzc20190626
26-Jun-2019 13:25:22	157	4814.0000	XLON	11002110000108469-E0eVCid6scFG20190626
26-Jun-2019 13:26:25	62	4811.5000	XLON	11002110000108999-E0eVCid6sdCZ20190626
26-Jun-2019 13:26:25	100	4811.5000	XLON	11002110000108999-E0eVCid6sdCX20190626
26-Jun-2019 13:30:59	150	4810.5000	XLON	01002010000109528-E0eVCid6sgdU20190626
26-Jun-2019 13:31:07	195	4809.5000	XLON	11002110000109491-E0eVCid6sgnS20190626
26-Jun-2019 13:36:12	115	4808.0000	XLON	11002110000112733-E0eVCid6slBz20190626
26-Jun-2019 13:36:12	35	4808.0000	XLON	11002110000112733-E0eVCid6slBx20190626
26-Jun-2019 13:38:11	197	4810.0000	XLON	01002010000113344-E0eVCid6smuO20190626
26-Jun-2019 13:40:38	155	4809.0000	XLON	01002010000114492-E0eVCid6sp6t20190626
26-Jun-2019 13:41:50	151	4810.5000	XLON	11002110000115531-E0eVCid6sqUB20190626
26-Jun-2019 13:44:55	163	4805.0000	XLON	01002010000116840-E0eVCid6suwU20190626
26-Jun-2019 13:53:42	157	4810.5000	XLON	01002010000119292-E0eVCid6t37T20190626
26-Jun-2019 13:55:48	151	4812.5000	XLON	11002110000119952-E0eVCid6t5dU20190626
26-Jun-2019 13:56:11	210	4811.0000	XLON	11002110000120055-E0eVCid6t68d20190626
26-Jun-2019 13:58:03	154	4812.0000	XLON	01002010000120496-E0eVCid6t7uO20190626
26-Jun-2019 14:00:08	15	4811.0000	XLON	01002010000120807-E0eVCid6t9oa20190626
26-Jun-2019 14:00:08	17	4811.0000	XLON	01002010000120807-E0eVCid6t9of20190626
26-Jun-2019 14:00:08	124	4811.0000	XLON	01002010000120807-E0eVCid6t9oc20190626
26-Jun-2019 14:04:00	58	4806.5000	XLON	11002110000121442-E0eVCid6tDPF20190626
26-Jun-2019 14:04:00	92	4806.5000	XLON	11002110000121442-E0eVCid6tDPH20190626
26-Jun-2019 14:06:10	150	4800.5000	XLON	11002110000122297-E0eVCid6tFO820190626
26-Jun-2019 14:09:58	165	4801.5000	XLON	01002010000123414-E0eVCid6tIoV20190626
26-Jun-2019 14:15:54	104	4807.0000	XLON	11002110000125353-E0eVCid6tNtc20190626
26-Jun-2019 14:21:29	194	4810.0000	XLON	11002110000127415-E0eVCid6tSt620190626
26-Jun-2019 14:21:29	1	4810.0000	XLON	11002110000127415-E0eVCid6tSt820190626
26-Jun-2019 14:24:27	150	4811.0000	XLON	01002010000128695-E0eVCid6tVYM20190626
26-Jun-2019 14:27:45	165	4808.0000	XLON	11002110000129461-E0eVCid6tYBC20190626
26-Jun-2019 14:29:02	117	4808.0000	XLON	01002010000130652-E0eVCid6tZCj20190626
26-Jun-2019 14:29:02	46	4808.0000	XLON	01002010000130652-E0eVCid6tZCm20190626
26-Jun-2019 14:29:52	165	4808.0000	XLON	11002110000130956-E0eVCid6tZfd20190626
26-Jun-2019 14:30:06	173	4803.0000	XLON	11002110000131106-E0eVCid6taI920190626
26-Jun-2019 14:31:11	150	4806.0000	XLON	11002110000131518-E0eVCid6tcFk20190626
26-Jun-2019 14:33:12	150	4805.5000	XLON	01002010000132174-E0eVCid6tfj620190626
26-Jun-2019 14:33:32	6	4801.5000	XLON	01002010000132381-E0eVCid6tgKA20190626
26-Jun-2019 14:33:32	3	4801.5000	XLON	01002010000132381-E0eVCid6tgKC20190626
26-Jun-2019 14:35:13	77	4806.5000	XLON	11002110000132965-E0eVCid6tjQJ20190626
26-Jun-2019 14:35:13	73	4806.5000	XLON	11002110000132965-E0eVCid6tjQM20190626
26-Jun-2019 14:36:38	150	4809.5000	XLON	01002010000133416-E0eVCid6tliK20190626
26-Jun-2019 14:37:40	150	4811.0000	XLON	11002110000133831-E0eVCid6tncI20190626
26-Jun-2019 14:40:10	36	4810.0000	XLON	11002110000134416-E0eVCid6trBq20190626
26-Jun-2019 14:40:10	156	4810.0000	XLON	11002110000134416-E0eVCid6trBi20190626
26-Jun-2019 14:40:10	166	4811.0000	XLON	01002010000134412-E0eVCid6trAG20190626
26-Jun-2019 14:43:34	165	4810.5000	XLON	01002010000135797-E0eVCid6tvNG20190626
26-Jun-2019 14:45:19	65	4810.0000	XLON	01002010000136642-E0eVCid6txsZ20190626
26-Jun-2019 14:45:19	100	4810.0000	XLON	01002010000136642-E0eVCid6txsX20190626
26-Jun-2019 14:46:40	160	4810.0000	XLON	01002010000136823-E0eVCid6tzRL20190626
26-Jun-2019 14:47:44	56	4807.0000	XLON	11002110000137182-E0eVCid6u10C20190626
26-Jun-2019 14:47:44	100	4807.0000	XLON	11002110000137182-E0eVCid6u10120190626
26-Jun-2019 14:53:05	19	4801.0000	XLON	11002110000138500-E0eVCid6u7qx20190626
26-Jun-2019 14:53:05	146	4801.0000	XLON	11002110000138500-E0eVCid6u7qt20190626
26-Jun-2019 14:54:33	160	4804.0000	XLON	11002110000138946-E0eVCid6u9xL20190626
26-Jun-2019 14:58:11	148	4803.0000	XLON	11002110000140136-E0eVCid6uEdk20190626
26-Jun-2019 15:00:10	251	4804.0000	XLON	01002010000140573-E0eVCid6uHdC20190626
26-Jun-2019 15:00:31	165	4802.0000	XLON	01002010000140902-E0eVCid6uIE820190626
26-Jun-2019 15:01:43	165	4803.0000	XLON	11002110000141310-E0eVCid6uJou20190626
26-Jun-2019 15:03:05	97	4805.0000	XLON	01002010000141567-E0eVCid6uLX620190626
26-Jun-2019 15:03:05	68	4805.0000	XLON	01002010000141567-E0eVCid6uLX420190626
26-Jun-2019 15:05:00	150	4812.0000	XLON	11002110000142297-E0eVCid6uNqV20190626
26-Jun-2019 15:11:29	150	4812.5000	XLON	11002110000143666-E0eVCid6uXWi20190626
26-Jun-2019 15:13:08	56	4809.0000	XLON	01002010000143977-E0eVCid6uZfk20190626
26-Jun-2019 15:13:12	169	4809.0000	XLON	01002010000143977-E0eVCid6uZjn20190626
26-Jun-2019 15:13:17	225	4808.5000	XLON	11002110000144024-E0eVCid6uZpX20190626
26-Jun-2019 15:14:25	186	4810.0000	XLON	11002110000144230-E0eVCid6ubEH20190626
26-Jun-2019 15:14:58	153	4809.5000	XLON	11002110000144305-E0eVCid6uc3020190626
26-Jun-2019 15:16:45	36	4809.5000	XLON	11002110000144551-E0eVCid6ue7A20190626
26-Jun-2019 15:18:20	65	4815.5000	XLON	11002110000145276-E0eVCid6ug7s20190626
26-Jun-2019 15:18:20	100	4815.5000	XLON	11002110000145276-E0eVCid6ug7q20190626
26-Jun-2019 15:19:52	164	4814.5000	XLON	11002110000145653-E0eVCid6uhTS20190626
26-Jun-2019 15:25:59	142	4822.0000	XLON	11002110000148291-E0eVCid6uogn20190626
26-Jun-2019 15:27:37	150	4824.5000	XLON	01002010000148579-E0eVCid6uqNo20190626
26-Jun-2019 15:29:16	100	4821.0000	XLON	01002010000148716-E0eVCid6usS920190626
26-Jun-2019 15:30:20	106	4823.0000	XLON	11002110000148916-E0eVCid6uuvs20190626
26-Jun-2019 15:30:20	87	4823.0000	XLON	11002110000148916-E0eVCid6uuvq20190626
26-Jun-2019 15:30:56	147	4823.5000	XLON	01002010000148950-E0eVCid6uwCt20190626
26-Jun-2019 15:30:56	14	4823.5000	XLON	01002010000148950-E0eVCid6uwCx20190626
26-Jun-2019 15:33:05	18	4826.5000	XLON	01002010000149205-E0eVCid6v03i20190626
26-Jun-2019 15:33:05	236	4826.5000	XLON	01002010000149205-E0eVCid6v03g20190626
26-Jun-2019 15:33:11	213	4825.5000	XLON	01002010000149193-E0eVCid6v0ES20190626
26-Jun-2019 15:34:07	165	4827.5000	XLON	01002010000149383-E0eVCid6v1Vp20190626
26-Jun-2019 15:35:37	154	4825.5000	XLON	11002110000149596-E0eVCid6v3jz20190626
26-Jun-2019 15:36:44	152	4823.0000	XLON	11002110000149699-E0eVCid6v5Lg20190626
26-Jun-2019 15:39:00	181	4820.5000	XLON	01002010000149943-E0eVCid6v8Vs20190626
26-Jun-2019 15:39:38	150	4819.5000	XLON	01002010000150055-E0eVCid6v9G620190626
26-Jun-2019 15:41:39	164	4822.0000	XLON	01002010000150345-E0eVCid6vC4R20190626
26-Jun-2019 15:43:21	154	4816.0000	XLON	11002110000150603-E0eVCid6vDkb20190626
26-Jun-2019 15:46:40	160	4818.5000	XLON	11002110000151021-E0eVCid6vHpZ20190626
26-Jun-2019 15:48:36	151	4817.5000	XLON	01002010000151193-E0eVCid6vKeN20190626
26-Jun-2019 15:49:59	107	4817.0000	XLON	11002110000151359-E0eVCid6vMtb20190626
26-Jun-2019 15:49:59	56	4817.0000	XLON	11002110000151359-E0eVCid6vMtZ20190626
26-Jun-2019 15:51:02	160	4813.5000	XLON	01002010000151604-E0eVCid6vOZX20190626
26-Jun-2019 15:53:03	153	4811.5000	XLON	11002110000151826-E0eVCid6vS1k20190626
26-Jun-2019 15:57:42	91	4817.0000	XLON	01002010000152354-E0eVCid6vYxl20190626
26-Jun-2019 15:57:42	89	4817.0000	XLON	01002010000152354-E0eVCid6vYxn20190626
26-Jun-2019 16:02:39	82	4824.5000	XLON	01002010000153036-E0eVCid6vgfm20190626
26-Jun-2019 16:02:46	184	4824.0000	XLON	01002010000153047-E0eVCid6vgp620190626
26-Jun-2019 16:05:09	100	4827.0000	XLON	11002110000153374-E0eVCid6vkVw20190626
26-Jun-2019 16:05:09	23	4827.0000	XLON	11002110000153374-E0eVCid6vkW020190626
26-Jun-2019 16:05:09	100	4827.0000	XLON	11002110000153374-E0eVCid6vkVy20190626
26-Jun-2019 16:05:29	59	4826.0000	XLON	01002010000153363-E0eVCid6vkzL20190626
26-Jun-2019 16:05:29	108	4826.0000	XLON	01002010000153363-E0eVCid6vkzJ20190626
26-Jun-2019 16:05:35	71	4825.5000	XLON	01002010000153386-E0eVCid6vl9820190626
26-Jun-2019 16:05:35	175	4825.5000	XLON	01002010000153386-E0eVCid6vl9620190626
26-Jun-2019 16:06:40	165	4826.0000	XLON	11002110000153496-E0eVCid6vm9G20190626
26-Jun-2019 16:06:55	150	4825.0000	XLON	01002010000153542-E0eVCid6vmRo20190626
26-Jun-2019 16:08:45	88	4826.5000	XLON	01002010000153806-E0eVCid6voOd20190626
26-Jun-2019 16:08:49	151	4825.5000	XLON	11002110000153822-E0eVCid6voRf20190626
26-Jun-2019 16:10:02	210	4823.0000	XLON	01002010000153958-E0eVCid6vq2x20190626
26-Jun-2019 16:12:23	151	4824.0000	XLON	01002010000154461-E0eVCid6vsxH20190626
26-Jun-2019 16:13:49	137	4825.5000	XLON	01002010000154641-E0eVCid6vui020190626
26-Jun-2019 16:13:49	14	4825.5000	XLON	01002010000154641-E0eVCid6vui420190626

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END