OSB GROUP PLC                                        
ISIN: GB00BLDRH360
11 December 2025

LEI number: 213800ZBKL9BHSL2K459

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

The Company announces that on 10 December 2025 it had purchased a total of 69,284 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 69,284 - -
Highest price paid (per ordinary share) 573.50p - -
Lowest price paid (per ordinary share) 566.00p - -
Volume weighted average price paid (per ordinary share) 570.39p - -

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 356,660,929 ordinary shares.

No ordinary shares are held in treasury. Therefore, the total number of voting rights in the Company is 356,660,929.

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
10-12-2025 16:17:26 GBp 740 573.00 XLON xeaNd1btYKA
10-12-2025 16:17:26 GBp 1,832 573.00 XLON xeaNd1btYKL
10-12-2025 16:05:41 GBp 2,186 572.50 XLON xeaNd1btIAJ
10-12-2025 16:05:41 GBp 261 572.50 XLON xeaNd1btILj
10-12-2025 16:04:05 GBp 513 572.50 XLON xeaNd1btGHi
10-12-2025 16:04:05 GBp 508 572.50 XLON xeaNd1btGIw
10-12-2025 16:04:05 GBp 514 572.50 XLON xeaNd1btGI3
10-12-2025 16:04:05 GBp 511 572.50 XLON xeaNd1btGIE
10-12-2025 16:04:05 GBp 512 572.50 XLON xeaNd1btGIN
10-12-2025 16:04:05 GBp 504 572.50 XLON xeaNd1btGTo
10-12-2025 15:50:29 GBp 159 571.50 XLON xeaNd1btDQJ
10-12-2025 15:50:29 GBp 31 571.50 XLON xeaNd1btDQL
10-12-2025 15:50:29 GBp 165 571.50 XLON xeaNd1btAb3
10-12-2025 15:50:29 GBp 28 571.50 XLON xeaNd1btAb5
10-12-2025 15:50:29 GBp 77 571.50 XLON xeaNd1btAb7
10-12-2025 15:50:29 GBp 112 571.50 XLON xeaNd1btAb9
10-12-2025 15:50:29 GBp 294 571.50 XLON xeaNd1btAbB
10-12-2025 15:50:29 GBp 198 571.50 XLON xeaNd1btAaX
10-12-2025 15:50:29 GBp 113 571.50 XLON xeaNd1btAaZ
10-12-2025 15:50:29 GBp 947 571.00 XLON xeaNd1btAaj
10-12-2025 15:34:24 GBp 1,223 571.50 XLON xeaNd1bmant
10-12-2025 15:34:19 GBp 216 572.00 XLON xeaNd1bma5B
10-12-2025 15:33:20 GBp 189 572.50 XLON xeaNd1bmbVU
10-12-2025 15:33:20 GBp 21 572.50 XLON xeaNd1bmbUa
10-12-2025 15:33:20 GBp 8 572.50 XLON xeaNd1bmbUW
10-12-2025 15:33:20 GBp 14 572.50 XLON xeaNd1bmbUY
10-12-2025 15:32:21 GBp 214 572.50 XLON xeaNd1bmZfY
10-12-2025 15:31:45 GBp 127 572.50 XLON xeaNd1bmWX4
10-12-2025 15:31:45 GBp 17 572.50 XLON xeaNd1bmWX6
10-12-2025 15:31:45 GBp 72 572.50 XLON xeaNd1bmWX8
10-12-2025 15:30:23 GBp 215 572.50 XLON xeaNd1bmkbG
10-12-2025 15:29:49 GBp 233 572.50 XLON xeaNd1bmkA4
10-12-2025 15:28:25 GBp 190 572.50 XLON xeaNd1bmixE
10-12-2025 15:27:26 GBp 150 572.50 XLON xeaNd1bmjLs
10-12-2025 15:27:26 GBp 33 572.50 XLON xeaNd1bmjLu
10-12-2025 15:27:26 GBp 17 572.50 XLON xeaNd1bmjLw
10-12-2025 15:27:26 GBp 82 572.50 XLON xeaNd1bmjLy
10-12-2025 15:25:28 GBp 282 572.50 XLON xeaNd1bme@b
10-12-2025 15:25:28 GBp 39 572.50 XLON xeaNd1bme@d
10-12-2025 15:25:28 GBp 208 572.50 XLON xeaNd1bme@Z
10-12-2025 15:21:03 GBp 604 572.00 XLON xeaNd1bmI@W
10-12-2025 15:20:33 GBp 473 572.50 XLON xeaNd1bmJhC
10-12-2025 15:19:23 GBp 207 572.50 XLON xeaNd1bmHbB
10-12-2025 15:19:23 GBp 207 572.50 XLON xeaNd1bmHbM
10-12-2025 15:19:23 GBp 27 572.50 XLON xeaNd1bmHbO
10-12-2025 15:18:17 GBp 218 572.50 XLON xeaNd1bmUDS
10-12-2025 15:18:17 GBp 27 572.50 XLON xeaNd1bmUDU
10-12-2025 15:17:01 GBp 251 572.50 XLON xeaNd1bmS5@
10-12-2025 15:17:01 GBp 35 572.50 XLON xeaNd1bmS50
10-12-2025 15:17:01 GBp 15 572.50 XLON xeaNd1bmS52
10-12-2025 15:17:01 GBp 33 572.50 XLON xeaNd1bmS54
10-12-2025 15:14:06 GBp 313 573.00 XLON xeaNd1bmPa1
10-12-2025 15:14:06 GBp 744 572.50 XLON xeaNd1bmPa9
10-12-2025 15:04:42 GBp 813 573.00 XLON xeaNd1bmB8g
10-12-2025 15:02:32 GBp 1,291 573.50 XLON xeaNd1bntmt
10-12-2025 14:59:52 GBp 75 573.50 XLON xeaNd1bnmaO
10-12-2025 14:59:25 GBp 302 573.50 XLON xeaNd1bnmQ@
10-12-2025 14:59:23 GBp 313 573.50 XLON xeaNd1bnndA
10-12-2025 14:59:23 GBp 315 573.50 XLON xeaNd1bnndI
10-12-2025 14:59:23 GBp 322 573.50 XLON xeaNd1bnndR
10-12-2025 14:59:23 GBp 315 573.50 XLON xeaNd1bnncY
10-12-2025 14:59:23 GBp 316 573.50 XLON xeaNd1bnnc3
10-12-2025 14:59:22 GBp 316 573.50 XLON xeaNd1bnnXj
10-12-2025 14:59:22 GBp 331 573.50 XLON xeaNd1bnnXq
10-12-2025 14:59:22 GBp 132 573.50 XLON xeaNd1bnnXw
10-12-2025 14:59:22 GBp 29 573.50 XLON xeaNd1bnnXy
10-12-2025 14:59:22 GBp 398 573.50 XLON xeaNd1bnnX@
10-12-2025 14:59:22 GBp 380 573.50 XLON xeaNd1bnnX0
10-12-2025 14:59:22 GBp 255 573.50 XLON xeaNd1bnnX2
10-12-2025 14:58:47 GBp 50 573.00 XLON xeaNd1bn@jD
10-12-2025 14:58:47 GBp 12 573.00 XLON xeaNd1bn@jF
10-12-2025 14:58:47 GBp 96 573.00 XLON xeaNd1bn@ij
10-12-2025 14:58:47 GBp 482 573.00 XLON xeaNd1bn@iv
10-12-2025 14:43:11 GBp 83 572.00 XLON xeaNd1bnKrG
10-12-2025 14:43:11 GBp 27 572.00 XLON xeaNd1bnKrI
10-12-2025 14:43:11 GBp 100 572.00 XLON xeaNd1bnKrK
10-12-2025 14:43:11 GBp 32 572.00 XLON xeaNd1bnKrM
10-12-2025 14:42:53 GBp 162 572.00 XLON xeaNd1bnK81
10-12-2025 14:42:53 GBp 98 572.00 XLON xeaNd1bnK83
10-12-2025 14:42:35 GBp 190 572.00 XLON xeaNd1bnLXF
10-12-2025 14:42:35 GBp 233 572.00 XLON xeaNd1bnLWi
10-12-2025 14:42:35 GBp 2,000 572.00 XLON xeaNd1bnLWk
10-12-2025 14:42:35 GBp 316 572.00 XLON xeaNd1bnLYE
10-12-2025 14:38:26 GBp 665 572.00 XLON xeaNd1bnVe8
10-12-2025 14:24:01 GBp 980 571.50 XLON xeaNd1bn8jN
10-12-2025 14:18:23 GBp 1,106 572.00 XLON xeaNd1bood0
10-12-2025 14:18:23 GBp 500 572.00 XLON xeaNd1bood2
10-12-2025 14:18:23 GBp 250 572.00 XLON xeaNd1bood4
10-12-2025 14:18:23 GBp 2,020 572.00 XLON xeaNd1bood6
10-12-2025 14:16:00 GBp 176 570.50 XLON xeaNd1bom98
10-12-2025 13:59:28 GBp 545 570.50 XLON xeaNd1boXBS
10-12-2025 13:35:52 GBp 264 570.50 XLON xeaNd1boQIy
10-12-2025 13:35:52 GBp 657 570.50 XLON xeaNd1boQI2
10-12-2025 13:30:55 GBp 749 570.50 XLON xeaNd1bo7@L
10-12-2025 13:21:34 GBp 467 570.00 XLON xeaNd1boCag
10-12-2025 13:19:50 GBp 269 570.50 XLON xeaNd1boDSQ
10-12-2025 13:19:47 GBp 228 571.50 XLON xeaNd1boDOd
10-12-2025 13:19:47 GBp 25 571.50 XLON xeaNd1boDOf
10-12-2025 13:19:47 GBp 44 571.50 XLON xeaNd1boDOh
10-12-2025 13:19:47 GBp 855 571.50 XLON xeaNd1boDOj
10-12-2025 13:19:47 GBp 448 571.50 XLON xeaNd1boDOl
10-12-2025 13:19:47 GBp 522 571.50 XLON xeaNd1boDOn
10-12-2025 13:18:45 GBp 289 571.00 XLON xeaNd1boAH5
10-12-2025 12:56:59 GBp 442 570.00 XLON xeaNd1bpcy9
10-12-2025 12:51:07 GBp 371 569.50 XLON xeaNd1bpZbh
10-12-2025 12:50:22 GBp 448 570.00 XLON xeaNd1bpZDG
10-12-2025 12:50:22 GBp 251 570.00 XLON xeaNd1bpZCe
10-12-2025 12:50:21 GBp 456 570.00 XLON xeaNd1bpZCo
10-12-2025 12:50:21 GBp 822 570.00 XLON xeaNd1bpZC@
10-12-2025 12:50:21 GBp 593 570.00 XLON xeaNd1bpZC0
10-12-2025 12:49:49 GBp 65 569.00 XLON xeaNd1bpWZl
10-12-2025 12:49:49 GBp 71 569.00 XLON xeaNd1bpWZx
10-12-2025 12:49:49 GBp 71 569.00 XLON xeaNd1bpWZz
10-12-2025 12:40:14 GBp 13 568.00 XLON xeaNd1bphgK
10-12-2025 12:40:14 GBp 113 568.00 XLON xeaNd1bphgM
10-12-2025 12:14:42 GBp 36 569.00 XLON xeaNd1bp6S@
10-12-2025 12:14:42 GBp 44 569.00 XLON xeaNd1bp6S0
10-12-2025 12:14:42 GBp 769 569.00 XLON xeaNd1bp6S2
10-12-2025 12:14:42 GBp 149 569.00 XLON xeaNd1bp6So
10-12-2025 12:14:42 GBp 143 569.00 XLON xeaNd1bp6Sq
10-12-2025 12:14:42 GBp 1 569.00 XLON xeaNd1bp6Ss
10-12-2025 12:14:42 GBp 278 569.00 XLON xeaNd1bp6Su
10-12-2025 12:14:42 GBp 226 569.00 XLON xeaNd1bp6Sw
10-12-2025 12:14:42 GBp 186 569.00 XLON xeaNd1bp6Sy
10-12-2025 12:05:56 GBp 376 568.50 XLON xeaNd1bpEj8
10-12-2025 12:03:49 GBp 369 568.50 XLON xeaNd1bpCYd
10-12-2025 12:03:49 GBp 449 568.50 XLON xeaNd1bpCYm
10-12-2025 12:00:54 GBp 97 568.50 XLON xeaNd1bpAEA
10-12-2025 11:45:01 GBp 504 569.00 XLON xeaNd1bi$Ii
10-12-2025 11:45:01 GBp 83 569.00 XLON xeaNd1bi$Ik
10-12-2025 11:45:01 GBp 475 569.00 XLON xeaNd1bi$Im
10-12-2025 11:43:39 GBp 449 568.50 XLON xeaNd1biyQn
10-12-2025 11:43:39 GBp 449 569.00 XLON xeaNd1biyQv
10-12-2025 11:20:14 GBp 586 569.50 XLON xeaNd1bijmO
10-12-2025 11:19:12 GBp 1 569.50 XLON xeaNd1bijP@
10-12-2025 11:19:10 GBp 228 569.50 XLON xeaNd1bijRa
10-12-2025 11:19:10 GBp 190 569.50 XLON xeaNd1bijRY
10-12-2025 11:15:42 GBp 370 570.00 XLON xeaNd1bieqt
10-12-2025 11:11:46 GBp 263 570.00 XLON xeaNd1biNq@
10-12-2025 11:11:46 GBp 78 570.00 XLON xeaNd1biNqy
10-12-2025 11:08:49 GBp 205 570.00 XLON xeaNd1biLnT
10-12-2025 10:58:42 GBp 694 568.50 XLON xeaNd1biTv6
10-12-2025 10:58:42 GBp 449 568.50 XLON xeaNd1biTvD
10-12-2025 10:53:29 GBp 190 569.00 XLON xeaNd1biPJx
10-12-2025 10:53:29 GBp 339 568.50 XLON xeaNd1biPJ@
10-12-2025 10:52:10 GBp 2,172 569.00 XLON xeaNd1bi6He
10-12-2025 10:52:10 GBp 385 569.00 XLON xeaNd1bi6Hr
10-12-2025 10:52:10 GBp 67 569.00 XLON xeaNd1bi6Ht
10-12-2025 10:25:19 GBp 561 568.00 XLON xeaNd1bjrK6
10-12-2025 10:25:18 GBp 271 567.50 XLON xeaNd1bjrN3
10-12-2025 10:25:18 GBp 391 567.50 XLON xeaNd1bjrN6
10-12-2025 10:25:18 GBp 58 567.50 XLON xeaNd1bjrN8
10-12-2025 10:13:10 GBp 191 567.00 XLON xeaNd1bjw5h
10-12-2025 10:05:53 GBp 98 567.00 XLON xeaNd1bjdQ1
10-12-2025 10:05:53 GBp 166 567.00 XLON xeaNd1bjdQ3
10-12-2025 10:05:53 GBp 29 567.00 XLON xeaNd1bjdQ5
10-12-2025 09:58:44 GBp 300 567.50 XLON xeaNd1bjXvn
10-12-2025 09:58:44 GBp 76 567.00 XLON xeaNd1bjXvq
10-12-2025 09:58:44 GBp 373 567.00 XLON xeaNd1bjXvs
10-12-2025 09:58:36 GBp 190 567.50 XLON xeaNd1bjXDW
10-12-2025 09:57:46 GBp 57 568.00 XLON xeaNd1bjkgg
10-12-2025 09:57:46 GBp 186 568.00 XLON xeaNd1bjkgk
10-12-2025 09:55:16 GBp 199 568.00 XLON xeaNd1bjiji
10-12-2025 09:55:16 GBp 163 568.00 XLON xeaNd1bjijy
10-12-2025 09:55:16 GBp 400 568.00 XLON xeaNd1bjij@
10-12-2025 09:55:16 GBp 242 568.00 XLON xeaNd1bjij0
10-12-2025 09:34:14 GBp 486 567.00 XLON xeaNd1bjSWl
10-12-2025 09:34:05 GBp 686 567.50 XLON xeaNd1bjSe@
10-12-2025 09:25:06 GBp 57 566.50 XLON xeaNd1bj61N
10-12-2025 09:25:06 GBp 57 566.50 XLON xeaNd1bj61P
10-12-2025 09:25:05 GBp 490 567.00 XLON xeaNd1bj61T
10-12-2025 09:25:05 GBp 45 567.00 XLON xeaNd1bj61V
10-12-2025 09:25:05 GBp 1 567.00 XLON xeaNd1bj60b
10-12-2025 09:25:05 GBp 43 567.00 XLON xeaNd1bj60d
10-12-2025 09:25:05 GBp 129 567.00 XLON xeaNd1bj60h
10-12-2025 09:23:46 GBp 210 567.50 XLON xeaNd1bj78d
10-12-2025 09:23:46 GBp 11 567.50 XLON xeaNd1bj78f
10-12-2025 09:23:46 GBp 104 567.50 XLON xeaNd1bj78h
10-12-2025 09:23:46 GBp 124 567.50 XLON xeaNd1bj78j
10-12-2025 09:16:49 GBp 41 567.00 XLON xeaNd1bj1fD
10-12-2025 09:16:49 GBp 379 567.00 XLON xeaNd1bj1fF
10-12-2025 09:11:27 GBp 313 566.00 XLON xeaNd1bjDMg
10-12-2025 09:10:42 GBp 135 567.00 XLON xeaNd1bjA5O
10-12-2025 09:10:42 GBp 109 567.00 XLON xeaNd1bjA5Q
10-12-2025 09:10:42 GBp 58 567.00 XLON xeaNd1bjA5S
10-12-2025 09:10:42 GBp 449 566.50 XLON xeaNd1bjA4y
10-12-2025 09:03:42 GBp 3 567.00 XLON xeaNd1bkqJn
10-12-2025 09:03:42 GBp 460 567.00 XLON xeaNd1bkqJp
10-12-2025 09:03:42 GBp 143 567.00 XLON xeaNd1bkqJr
10-12-2025 09:03:42 GBp 46 567.00 XLON xeaNd1bkqJt
10-12-2025 09:03:42 GBp 198 567.00 XLON xeaNd1bkqJv
10-12-2025 09:03:42 GBp 449 566.50 XLON xeaNd1bkqJ@
10-12-2025 08:54:02 GBp 27 566.00 XLON xeaNd1bkzra
10-12-2025 08:45:58 GBp 279 566.00 XLON xeaNd1bkdAB
10-12-2025 08:45:33 GBp 4 566.00 XLON xeaNd1bkaZ9
10-12-2025 08:45:33 GBp 629 566.00 XLON xeaNd1bkaYb
10-12-2025 08:38:26 GBp 417 566.50 XLON xeaNd1bkXuV
10-12-2025 08:36:03 GBp 310 567.00 XLON xeaNd1bklnU
10-12-2025 08:34:19 GBp 713 567.50 XLON xeaNd1bkiNG
10-12-2025 08:33:14 GBp 57 568.50 XLON xeaNd1bkj6$
10-12-2025 08:33:14 GBp 240 568.50 XLON xeaNd1bkj6x
10-12-2025 08:33:14 GBp 235 568.50 XLON xeaNd1bkj6z
10-12-2025 08:32:31 GBp 216 568.00 XLON xeaNd1bkgk@
10-12-2025 08:32:31 GBp 72 568.00 XLON xeaNd1bkgky
10-12-2025 08:28:32 GBp 162 569.00 XLON xeaNd1bkfF2
10-12-2025 08:28:32 GBp 28 568.50 XLON xeaNd1bkfF4
10-12-2025 08:27:33 GBp 131 568.50 XLON xeaNd1bkM1d
10-12-2025 08:27:33 GBp 31 568.50 XLON xeaNd1bkM1f
10-12-2025 08:27:33 GBp 28 568.50 XLON xeaNd1bkM1Y
10-12-2025 08:23:37 GBp 18 568.50 XLON xeaNd1bkL6u
10-12-2025 08:23:37 GBp 177 568.50 XLON xeaNd1bkL6w
10-12-2025 08:15:08 GBp 282 567.00 XLON xeaNd1bkSeC
10-12-2025 08:14:59 GBp 631 567.50 XLON xeaNd1bkS6j
10-12-2025 08:12:15 GBp 724 568.00 XLON xeaNd1bkQ9K
10-12-2025 08:08:02 GBp 347 567.00 XLON xeaNd1bk6uM
10-12-2025 08:07:53 GBp 255 567.50 XLON xeaNd1bk63z
10-12-2025 08:06:54 GBp 7 568.00 XLON xeaNd1bk7nn
10-12-2025 08:06:54 GBp 300 568.00 XLON xeaNd1bk7np
10-12-2025 08:06:54 GBp 30 568.00 XLON xeaNd1bk7nr
10-12-2025 08:06:00 GBp 64 568.00 XLON xeaNd1bk7T4
10-12-2025 08:06:00 GBp 126 568.00 XLON xeaNd1bk7T6
10-12-2025 08:04:27 GBp 313 566.50 XLON xeaNd1bk5eT
10-12-2025 08:04:27 GBp 449 567.00 XLON xeaNd1bk5eV
10-12-2025 08:02:58 GBp 37 567.00 XLON xeaNd1bk27U