OSB GROUP PLC                                        
ISIN: GB00BLDRH360
15 October 2025

LEI number: 213800ZBKL9BHSL2K459

OSB GROUP PLC (the “Company”)
Transaction in Own Shares

The Company announces that on 14 October 2025 it had purchased a total of 70,671 of its ordinary shares of £0.01 each (the "ordinary shares") on the London Stock Exchange, CBOE BXE and CBOE CXE, through the Company's broker Citigroup Global Markets Limited as detailed below. The repurchased ordinary shares will be cancelled.

  London Stock Exchange CBOE BXE CBOE CXE
Number of ordinary shares purchased 70,671 - -
Highest price paid (per ordinary share) 563.00p - -
Lowest price paid (per ordinary share) 554.00p - -
Volume weighted average price paid (per ordinary share) 558.69p - -

The purchases form part of the Company’s share buyback programme announced on 13 March 2025.

Following settlement of the above purchases and cancellation of the purchased ordinary shares, the Company's total number of ordinary shares in issue shall be 359,519,261 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 359,519,261.

In accordance with Article 5(1)(b) of Regulation (EU) No 596/2014 as incorporated into and implemented under English law (including by virtue of the European Union (Withdrawal) Act 2018), the detailed breakdown of individual trades made by Citigroup Global Markets Limited on behalf of the Company as part of the share buyback programme is set out below.

This announcement does not constitute, or form part of, an offer or any solicitation of an offer for securities in any jurisdiction.

Schedule of Purchases – Individual Transactions

Issuer Name OSB GROUP PLC
LEI 213800ZBKL9BHSL2K459
ISIN GB00BLDRH360
Intermediary Name Citigroup Global Markets Limited
Intermediary Code SBILGB2L
Timezone GMT+1
Currency GBP


Transaction Date Trade Time Currency Volume Price Trading Venue Transaction ID
14-10-2025 16:28:31 GBp 602 563.00 XLON xHaNlnovs$F
14-10-2025 16:28:31 GBp 997 563.00 XLON xHaNlnovs$D
14-10-2025 16:28:31 GBp 1,007 563.00 XLON xHaNlnovs$L
14-10-2025 16:28:31 GBp 510 563.00 XLON xHaNlnovs$N
14-10-2025 16:28:31 GBp 363 563.00 XLON xHaNlnovs$P
14-10-2025 16:14:37 GBp 1,785 561.00 XLON xHaNlnovmHl
14-10-2025 16:11:06 GBp 1,685 562.00 XLON xHaNlnov@dc
14-10-2025 16:11:06 GBp 431 562.00 XLON xHaNlnov@de
14-10-2025 16:11:06 GBp 211 562.00 XLON xHaNlnov@dg
14-10-2025 16:11:06 GBp 689 562.00 XLON xHaNlnov@di
14-10-2025 16:11:06 GBp 388 562.00 XLON xHaNlnov@dk
14-10-2025 16:11:06 GBp 90 562.00 XLON xHaNlnov@dm
14-10-2025 16:11:06 GBp 54 562.00 XLON xHaNlnov@do
14-10-2025 16:11:06 GBp 184 562.00 XLON xHaNlnov@dq
14-10-2025 16:10:02 GBp 478 562.00 XLON xHaNlnov@@a
14-10-2025 16:10:02 GBp 226 562.00 XLON xHaNlnov@@c
14-10-2025 16:10:02 GBp 394 562.00 XLON xHaNlnov@@e
14-10-2025 16:10:02 GBp 994 562.00 XLON xHaNlnov@$U
14-10-2025 16:10:02 GBp 334 562.00 XLON xHaNlnov@@W
14-10-2025 16:10:02 GBp 15 562.00 XLON xHaNlnov@@Y
14-10-2025 16:10:02 GBp 47 562.00 XLON xHaNlnov@@x
14-10-2025 16:10:02 GBp 138 562.00 XLON xHaNlnov@@t
14-10-2025 16:10:02 GBp 113 562.00 XLON xHaNlnov@@v
14-10-2025 16:10:02 GBp 1,117 561.50 XLON xHaNlnov@@3
14-10-2025 15:49:59 GBp 301 561.50 XLON xHaNlnovv8r
14-10-2025 15:49:59 GBp 429 561.50 XLON xHaNlnovv8t
14-10-2025 15:48:00 GBp 1,117 561.00 XLON xHaNlnovcEI
14-10-2025 15:30:01 GBp 556 560.50 XLON xHaNlnoviep
14-10-2025 15:24:19 GBp 665 560.00 XLON xHaNlnovhG6
14-10-2025 15:24:19 GBp 33 560.00 XLON xHaNlnovhG8
14-10-2025 15:23:58 GBp 1,765 560.50 XLON xHaNlnovezc
14-10-2025 15:22:31 GBp 330 561.00 XLON xHaNlnovfWf
14-10-2025 15:22:31 GBp 92 561.00 XLON xHaNlnovfWh
14-10-2025 15:15:29 GBp 1,338 560.50 XLON xHaNlnovKx$
14-10-2025 15:15:29 GBp 488 560.50 XLON xHaNlnovKx1
14-10-2025 15:13:20 GBp 157 561.00 XLON xHaNlnovL4b
14-10-2025 15:13:20 GBp 115 561.00 XLON xHaNlnovL4d
14-10-2025 15:13:20 GBp 6 561.00 XLON xHaNlnovL4@
14-10-2025 15:13:20 GBp 101 561.00 XLON xHaNlnovL4N
14-10-2025 15:13:20 GBp 91 561.00 XLON xHaNlnovL4P
14-10-2025 15:13:20 GBp 363 561.00 XLON xHaNlnovL7k
14-10-2025 15:13:20 GBp 88 561.00 XLON xHaNlnovL7m
14-10-2025 15:13:20 GBp 304 561.00 XLON xHaNlnovL7o
14-10-2025 15:13:20 GBp 210 561.00 XLON xHaNlnovL7q
14-10-2025 15:13:20 GBp 104 561.00 XLON xHaNlnovL7s
14-10-2025 15:06:02 GBp 654 560.00 XLON xHaNlnovHx$
14-10-2025 15:06:02 GBp 61 560.00 XLON xHaNlnovHx1
14-10-2025 15:06:02 GBp 519 560.00 XLON xHaNlnovHxz
14-10-2025 14:59:49 GBp 245 560.00 XLON xHaNlnovS6g
14-10-2025 14:59:49 GBp 379 560.00 XLON xHaNlnovS6i
14-10-2025 14:59:49 GBp 1,117 559.50 XLON xHaNlnovS6r
14-10-2025 14:52:32 GBp 280 560.00 XLON xHaNlnovOxC
14-10-2025 14:52:32 GBp 281 560.00 XLON xHaNlnovOwa
14-10-2025 14:52:32 GBp 14 560.00 XLON xHaNlnovOwc
14-10-2025 14:52:32 GBp 200 560.00 XLON xHaNlnovOwe
14-10-2025 14:38:02 GBp 401 558.50 XLON xHaNlnov0zk
14-10-2025 14:37:53 GBp 435 558.50 XLON xHaNlnov0vB
14-10-2025 14:36:10 GBp 41 559.00 XLON xHaNlnov1$b
14-10-2025 14:36:10 GBp 10 559.00 XLON xHaNlnov1$X
14-10-2025 14:36:10 GBp 3 559.00 XLON xHaNlnov1$Z
14-10-2025 14:36:10 GBp 745 559.00 XLON xHaNlnov1yV
14-10-2025 14:36:10 GBp 520 559.00 XLON xHaNlnov1$e
14-10-2025 14:36:10 GBp 621 559.00 XLON xHaNlnov1$g
14-10-2025 14:36:10 GBp 554 559.00 XLON xHaNlnov1$i
14-10-2025 14:34:42 GBp 1,020 559.50 XLON xHaNlnovEi1
14-10-2025 14:29:25 GBp 240 559.50 XLON xHaNlnovCG5
14-10-2025 14:23:51 GBp 29 559.50 XLON xHaNlnovBd@
14-10-2025 14:23:51 GBp 475 559.50 XLON xHaNlnovBd0
14-10-2025 14:23:51 GBp 632 559.50 XLON xHaNlnovBdw
14-10-2025 14:23:51 GBp 208 559.50 XLON xHaNlnovBdy
14-10-2025 14:17:19 GBp 558 559.00 XLON xHaNlnov90W
14-10-2025 14:17:19 GBp 214 559.00 XLON xHaNlnov91U
14-10-2025 14:15:34 GBp 945 558.00 XLON xHaNlnowsli
14-10-2025 14:15:34 GBp 400 558.00 XLON xHaNlnowslk
14-10-2025 14:04:51 GBp 160 557.50 XLON xHaNlnowrRz
14-10-2025 14:04:51 GBp 209 557.50 XLON xHaNlnowrR3
14-10-2025 14:04:51 GBp 199 557.50 XLON xHaNlnowrR5
14-10-2025 14:00:54 GBp 65 557.00 XLON xHaNlnowpeH
14-10-2025 14:00:54 GBp 124 557.00 XLON xHaNlnowpeK
14-10-2025 13:43:52 GBp 526 556.50 XLON xHaNlnow$GR
14-10-2025 13:43:52 GBp 1,021 556.50 XLON xHaNlnow$GU
14-10-2025 13:42:13 GBp 308 557.50 XLON xHaNlnowyor
14-10-2025 13:39:16 GBp 60 557.50 XLON xHaNlnowzhC
14-10-2025 13:39:16 GBp 300 557.50 XLON xHaNlnowzhE
14-10-2025 13:39:16 GBp 6 557.50 XLON xHaNlnowzhG
14-10-2025 13:36:19 GBp 215 557.50 XLON xHaNlnowwcN
14-10-2025 13:36:19 GBp 77 557.50 XLON xHaNlnowwcP
14-10-2025 13:33:22 GBp 198 557.50 XLON xHaNlnowwUj
14-10-2025 13:33:22 GBp 160 557.50 XLON xHaNlnowwUl
14-10-2025 13:31:24 GBp 195 557.50 XLON xHaNlnowx5U
14-10-2025 13:29:26 GBp 348 557.50 XLON xHaNlnowufz
14-10-2025 13:15:32 GBp 62 557.00 XLON xHaNlnowaWM
14-10-2025 13:15:32 GBp 470 557.00 XLON xHaNlnowaWO
14-10-2025 13:06:28 GBp 344 557.00 XLON xHaNlnowYTh
14-10-2025 13:05:47 GBp 268 557.50 XLON xHaNlnowZiW
14-10-2025 13:05:47 GBp 43 557.50 XLON xHaNlnowZiY
14-10-2025 13:05:47 GBp 70 557.50 XLON xHaNlnowZjU
14-10-2025 13:01:29 GBp 345 558.00 XLON xHaNlnowWmh
14-10-2025 13:01:01 GBp 1,030 558.50 XLON xHaNlnowWwc
14-10-2025 13:00:29 GBp 362 559.00 XLON xHaNlnowWAm
14-10-2025 13:00:29 GBp 89 559.00 XLON xHaNlnowWA9
14-10-2025 13:00:29 GBp 138 559.00 XLON xHaNlnowWAB
14-10-2025 13:00:29 GBp 635 558.50 XLON xHaNlnowWAM
14-10-2025 12:42:39 GBp 119 558.00 XLON xHaNlnowhFF
14-10-2025 12:42:39 GBp 359 558.00 XLON xHaNlnowhFH
14-10-2025 12:40:36 GBp 254 558.50 XLON xHaNlnoweKJ
14-10-2025 12:40:36 GBp 20 558.50 XLON xHaNlnoweKL
14-10-2025 12:40:36 GBp 181 558.50 XLON xHaNlnoweKN
14-10-2025 12:40:36 GBp 99 558.50 XLON xHaNlnoweKP
14-10-2025 12:40:36 GBp 516 558.00 XLON xHaNlnoweKU
14-10-2025 12:30:42 GBp 66 558.50 XLON xHaNlnowNZW
14-10-2025 12:30:42 GBp 52 558.50 XLON xHaNlnowNZY
14-10-2025 12:30:42 GBp 104 558.50 XLON xHaNlnowNZa
14-10-2025 12:29:55 GBp 189 558.50 XLON xHaNlnowNgK
14-10-2025 12:29:55 GBp 452 558.50 XLON xHaNlnowNrb
14-10-2025 12:29:55 GBp 226 558.50 XLON xHaNlnowNrd
14-10-2025 12:29:55 GBp 159 558.50 XLON xHaNlnowNrZ
14-10-2025 12:12:12 GBp 112 557.50 XLON xHaNlnowJbb
14-10-2025 12:12:12 GBp 100 557.50 XLON xHaNlnowJbd
14-10-2025 12:12:12 GBp 260 557.50 XLON xHaNlnowJbf
14-10-2025 12:12:12 GBp 173 557.50 XLON xHaNlnowJbh
14-10-2025 12:12:12 GBp 178 557.50 XLON xHaNlnowJbj
14-10-2025 12:05:37 GBp 257 556.50 XLON xHaNlnowGFb
14-10-2025 12:05:37 GBp 51 556.50 XLON xHaNlnowGFX
14-10-2025 12:05:37 GBp 200 556.50 XLON xHaNlnowGFZ
14-10-2025 11:54:01 GBp 278 555.00 XLON xHaNlnowVKL
14-10-2025 11:53:42 GBp 320 555.50 XLON xHaNlnowVJg
14-10-2025 11:53:31 GBp 492 556.00 XLON xHaNlnowVS@
14-10-2025 11:53:31 GBp 62 556.00 XLON xHaNlnowVSy
14-10-2025 11:52:02 GBp 450 556.00 XLON xHaNlnowSsA
14-10-2025 11:45:14 GBp 248 557.00 XLON xHaNlnowQaW
14-10-2025 11:45:14 GBp 66 557.00 XLON xHaNlnowQaY
14-10-2025 11:45:14 GBp 220 557.00 XLON xHaNlnowQbU
14-10-2025 11:45:14 GBp 33 557.00 XLON xHaNlnowQaa
14-10-2025 11:45:14 GBp 447 556.50 XLON xHaNlnowQag
14-10-2025 11:28:57 GBp 577 556.50 XLON xHaNlnow7X8
14-10-2025 11:28:56 GBp 447 557.00 XLON xHaNlnow7XM
14-10-2025 11:15:21 GBp 512 556.50 XLON xHaNlnow3ZI
14-10-2025 11:13:50 GBp 117 557.50 XLON xHaNlnow34B
14-10-2025 11:13:50 GBp 467 557.50 XLON xHaNlnow34D
14-10-2025 11:13:50 GBp 83 557.50 XLON xHaNlnow34F
14-10-2025 11:13:50 GBp 69 557.50 XLON xHaNlnow34H
14-10-2025 11:13:50 GBp 616 557.50 XLON xHaNlnow34R
14-10-2025 11:13:50 GBp 196 557.50 XLON xHaNlnow34T
14-10-2025 11:08:27 GBp 95 557.50 XLON xHaNlnow1bu
14-10-2025 11:08:27 GBp 15 557.50 XLON xHaNlnow1bw
14-10-2025 11:08:27 GBp 370 557.50 XLON xHaNlnow1by
14-10-2025 11:08:27 GBp 204 557.50 XLON xHaNlnow1bC
14-10-2025 11:08:27 GBp 200 557.50 XLON xHaNlnow1bG
14-10-2025 10:49:42 GBp 64 557.00 XLON xHaNlnowABh
14-10-2025 10:49:42 GBp 268 557.00 XLON xHaNlnowABj
14-10-2025 10:49:42 GBp 522 557.00 XLON xHaNlnowABk
14-10-2025 10:49:42 GBp 447 556.50 XLON xHaNlnowABt
14-10-2025 10:40:35 GBp 409 557.00 XLON xHaNlnoxsW3
14-10-2025 10:40:35 GBp 120 557.00 XLON xHaNlnoxsW5
14-10-2025 10:40:35 GBp 547 557.00 XLON xHaNlnoxsW7
14-10-2025 10:40:35 GBp 288 556.50 XLON xHaNlnoxsWO
14-10-2025 10:40:35 GBp 471 557.00 XLON xHaNlnoxsZY
14-10-2025 10:17:43 GBp 454 557.00 XLON xHaNlnox@sg
14-10-2025 10:15:59 GBp 163 557.00 XLON xHaNlnox@RI
14-10-2025 10:15:58 GBp 357 558.00 XLON xHaNlnox@Q0
14-10-2025 10:15:58 GBp 48 558.00 XLON xHaNlnox@Q9
14-10-2025 10:15:58 GBp 178 558.00 XLON xHaNlnox@QB
14-10-2025 10:15:58 GBp 447 557.50 XLON xHaNlnox@QI
14-10-2025 10:04:28 GBp 1,205 557.50 XLON xHaNlnoxxvm
14-10-2025 10:04:28 GBp 504 557.50 XLON xHaNlnoxxvo
14-10-2025 09:59:58 GBp 437 556.00 XLON xHaNlnoxclB
14-10-2025 09:58:30 GBp 299 556.50 XLON xHaNlnoxc6S
14-10-2025 09:51:22 GBp 447 556.50 XLON xHaNlnoxa5o
14-10-2025 09:51:22 GBp 447 556.50 XLON xHaNlnoxa5u
14-10-2025 09:35:08 GBp 446 556.00 XLON xHaNlnoxXqP
14-10-2025 09:35:08 GBp 1 556.00 XLON xHaNlnoxXqR
14-10-2025 09:18:36 GBp 338 555.50 XLON xHaNlnoxj9Y
14-10-2025 09:17:42 GBp 252 556.00 XLON xHaNlnoxjOc
14-10-2025 09:17:42 GBp 142 556.00 XLON xHaNlnoxjOe
14-10-2025 09:04:21 GBp 220 554.00 XLON xHaNlnoxfwe
14-10-2025 09:04:20 GBp 319 554.50 XLON xHaNlnoxfwE
14-10-2025 09:03:12 GBp 480 555.00 XLON xHaNlnoxfIX
14-10-2025 09:03:00 GBp 1 555.00 XLON xHaNlnoxfPl
14-10-2025 09:02:20 GBp 312 555.00 XLON xHaNlnoxMZo
14-10-2025 09:02:19 GBp 388 556.00 XLON xHaNlnoxMZH
14-10-2025 09:02:19 GBp 70 556.00 XLON xHaNlnoxMZJ
14-10-2025 09:02:19 GBp 250 556.00 XLON xHaNlnoxMZL
14-10-2025 09:02:19 GBp 447 555.50 XLON xHaNlnoxMZO
14-10-2025 09:00:35 GBp 378 556.00 XLON xHaNlnoxMLf
14-10-2025 08:53:53 GBp 946 556.00 XLON xHaNlnoxKKT
14-10-2025 08:53:53 GBp 22 556.00 XLON xHaNlnoxKKV
14-10-2025 08:53:53 GBp 11 556.00 XLON xHaNlnoxKNX
14-10-2025 08:49:06 GBp 447 555.50 XLON xHaNlnoxIfN
14-10-2025 08:40:15 GBp 312 554.00 XLON xHaNlnoxH8p
14-10-2025 08:40:14 GBp 447 554.50 XLON xHaNlnoxH88
14-10-2025 08:37:59 GBp 341 555.00 XLON xHaNlnoxU4@
14-10-2025 08:37:58 GBp 312 555.00 XLON xHaNlnoxU7Y
14-10-2025 08:37:56 GBp 447 555.50 XLON xHaNlnoxU3z
14-10-2025 08:37:56 GBp 447 555.50 XLON xHaNlnoxU38
14-10-2025 08:12:34 GBp 79 555.00 XLON xHaNlnox4aP
14-10-2025 08:11:09 GBp 430 555.50 XLON xHaNlnox4z2
14-10-2025 08:06:48 GBp 214 556.50 XLON xHaNlnox50P
14-10-2025 08:06:48 GBp 238 556.50 XLON xHaNlnox50U
14-10-2025 08:06:48 GBp 539 557.00 XLON xHaNlnox53b
14-10-2025 08:06:38 GBp 312 558.00 XLON xHaNlnox52M
14-10-2025 08:06:38 GBp 155 558.50 XLON xHaNlnox52Q
14-10-2025 08:06:38 GBp 292 558.50 XLON xHaNlnox52S
14-10-2025 08:02:26 GBp 444 559.00 XLON xHaNlnox3la
14-10-2025 08:02:26 GBp 26 559.00 XLON xHaNlnox3lc