ARMARM HOLDINGS PLC /UK
- Market cap
- $224.63B
- as of 2026-10-23
- Latest close
- $210.33
- as of 2026-10-23
- Sector
- Technology
- as of 2026-10-24
- Industry
- Semiconductors
- as of 2026-10-24
Cluster
No cluster in the last 90 days under the default rule (14d · ≥2 insiders · all roles).
Form 4 historysince 2026-03-27
| Insider | Traded | Filed | Type | Shares | Price | Value | Owned after | 10b5-1 plan | Filing |
|---|---|---|---|---|---|---|---|---|---|
| Child JasonChief Financial Officer | Sep 21 | Sep 23 | S | 10,400 | $300.00 | Sale −$3,120,000 | 153,442 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | Sep 14 | Sep 16 | A · derivative | 17,288 | $0.00 | $0 | 65,270 | No | Form 4 |
| Haas Rene A.Chief Executive Officer | Sep 9 | Sep 10 | A · derivative | 425,000 | $0.00 | $0 | 425,000 | No | Form 4 |
| Haas Rene A.Chief Executive Officer | Aug 31 | Sep 10 | A | 64 | $108.33 | $6,933 | 338,666 | No | Form 4 |
| Child JasonChief Financial Officer | Aug 27 | Aug 31 | S | 10,400 | $255.33 | Sale −$2,655,432 | 163,832 | Yes | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | Aug 17 | Aug 18 | M | 862 | not reported | not reported | 12,997 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | Aug 17 | Aug 18 | M | 819 | not reported | not reported | 13,816 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | Aug 17 | Aug 18 | F | 856 | $271.43 | $232,344 | 12,960 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | Aug 17 | Aug 18 | M · derivative | 862 | $0.00 | $0 | 100,390 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | Aug 17 | Aug 18 | M · derivative | 819 | $0.00 | $0 | 99,571 | No | Form 4 |
| Sine Jeffrey | Aug 7 | Aug 11 | G | 9,572 | $0.00 | $0 | not reported | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | Jun 2 | Jun 4 | S | 11,306 | $392.70 | Sale −$4,439,866 | 12,135 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | Jun 1 | Jun 3 | S | 2,644 | $383.73 | Sale −$1,014,582 | 24,485 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | Jun 1 | Jun 3 | S | 3,922 | $415.52 | Sale −$1,629,669 | 20,563 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | May 28 | Jun 1 | S | 4,200 | $343.81 | Sale −$1,444,002 | 27,129 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | May 22 | May 26 | S | 2,300 | $305.82 | Sale −$703,386 | 31,329 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 21 | May 22 | S | 2,805 | $288.10 | Sale −$808,121 | 5,000 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 21 | May 22 | S | 5,000 | $291.08 | Sale −$1,455,400 | not reported | No | Form 4 |
| Abbey WilliamChief Commercial Officer | May 21 | May 22 | S | 4,655 | $287.03 | Sale −$1,336,125 | 33,629 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 21 | May 21 | S | 4,000 | $282.77 | Sale −$1,131,080 | 7,805 | No | Form 4 |
| Child JasonChief Financial Officer | May 20 | May 21 | S | 31,920 | $226.54 | Sale −$7,231,157 | 174,232 | Yes | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 20 | May 21 | S | 3,100 | $252.25 | Sale −$781,975 | 11,805 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | May 20 | May 21 | S | 5,069 | $257.18 | Sale −$1,303,645 | 38,284 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | May 19 | May 21 | S | 10,887 | $224.14 | Sale −$2,440,212 | 43,353 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 19 | May 21 | S | 40,941 | $215.00 | Sale −$8,802,315 | not reported | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 18 | May 19 | S | 24,339 | $209.15 | Sale −$5,090,502 | not reported | No | Form 4 |
| Dykstra Karen E | May 15 | May 19 | A · derivative | 1,531 | $0.00 | $0 | 5,802 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | A | 11,909 | not reported | not reported | 165,335 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | M | 4,670 | not reported | not reported | 170,005 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | A | 11,849 | not reported | not reported | 181,854 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | M | 4,647 | not reported | not reported | 186,501 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | A | 57,601 | not reported | not reported | 244,102 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | F | 37,950 | $209.16 | $7,937,622 | 206,152 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | A · derivative | 14,842 | $0.00 | $0 | 149,268 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | M · derivative | 4,670 | $0.00 | $0 | 144,598 | No | Form 4 |
| Child JasonChief Financial Officer | May 15 | May 19 | M · derivative | 4,647 | $0.00 | $0 | 139,951 | No | Form 4 |
| Sohn Young | May 15 | May 19 | M | 2,141 | not reported | not reported | 2,825 | No | Form 4 |
| Sohn Young | May 15 | May 19 | F | 429 | $209.16 | $89,730 | 2,396 | No | Form 4 |
| Sohn Young | May 15 | May 19 | M · derivative | 2,141 | $0.00 | $0 | not reported | No | Form 4 |
| Sohn Young | May 15 | May 19 | A · derivative | 1,531 | $0.00 | $0 | 1,531 | No | Form 4 |
| Sine Jeffrey | May 15 | May 19 | M | 2,141 | not reported | not reported | 9,572 | No | Form 4 |
| Sine Jeffrey | May 15 | May 19 | M · derivative | 2,141 | $0.00 | $0 | not reported | No | Form 4 |
| Sine Jeffrey | May 15 | May 19 | A · derivative | 1,531 | $0.00 | $0 | 1,531 | No | Form 4 |
| Jacobs Paul E | May 15 | May 19 | M | 2,141 | not reported | not reported | 7,442 | No | Form 4 |
| Jacobs Paul E | May 15 | May 19 | M · derivative | 2,141 | $0.00 | $0 | not reported | No | Form 4 |
| Jacobs Paul E | May 15 | May 19 | A · derivative | 1,531 | $0.00 | $0 | 1,531 | No | Form 4 |
| Schooler Rosemary | May 15 | May 19 | M | 2,141 | not reported | not reported | 9,572 | No | Form 4 |
| Schooler Rosemary | May 15 | May 19 | M · derivative | 2,141 | $0.00 | $0 | not reported | No | Form 4 |
| Schooler Rosemary | May 15 | May 19 | A · derivative | 1,531 | $0.00 | $0 | 1,531 | No | Form 4 |
| Fisher Ronald D | May 15 | May 19 | A · derivative | 1,531 | $0.00 | $0 | 5,802 | No | Form 4 |
| Haas Rene A.Chief Executive Officer | May 15 | May 19 | A | 51,952 | not reported | not reported | 325,632 | No | Form 4 |
| Haas Rene A.Chief Executive Officer | May 15 | May 19 | A | 51,691 | not reported | not reported | 377,323 | No | Form 4 |
| Haas Rene A.Chief Executive Officer | May 15 | May 19 | A | 162,000 | not reported | not reported | 539,323 | No | Form 4 |
| Haas Rene A.Chief Executive Officer | May 15 | May 19 | F | 143,316 | $209.16 | $29,975,975 | 396,007 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 15 | May 19 | A | 5,612 | not reported | not reported | 16,377 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 15 | May 19 | M | 2,200 | not reported | not reported | 18,577 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 15 | May 19 | F | 3,672 | $209.16 | $768,036 | 14,905 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 15 | May 19 | A · derivative | 8,044 | $0.00 | $0 | 125,705 | No | Form 4 |
| Eaton Charlotte ClaireChief People Officer | May 15 | May 19 | M · derivative | 2,200 | $0.00 | $0 | 123,505 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | A | 10,668 | not reported | not reported | 10,668 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | M | 4,184 | not reported | not reported | 14,852 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | M | 3,950 | not reported | not reported | 18,802 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | A | 10,071 | not reported | not reported | 28,873 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | A | 48,378 | not reported | not reported | 77,251 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | F | 36,310 | $209.16 | $7,594,600 | 40,941 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | A · derivative | 15,716 | $0.00 | $0 | 146,894 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | M · derivative | 4,184 | $0.00 | $0 | 142,710 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 15 | May 19 | M · derivative | 3,950 | $0.00 | $0 | 138,760 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | A | 5,217 | not reported | not reported | 5,543 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M | 2,046 | not reported | not reported | 7,589 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M | 14,595 | not reported | not reported | 22,184 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | A | 4,158 | not reported | not reported | 26,342 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M | 1,631 | not reported | not reported | 27,973 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | A | 13,315 | not reported | not reported | 41,288 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M | 4,352 | not reported | not reported | 45,640 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | F | 21,301 | $209.16 | $4,455,317 | 24,339 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | A · derivative | 6,648 | $0.00 | $0 | 106,282 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | A · derivative | 34,785 | $0.00 | $0 | 141,067 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M · derivative | 2,046 | $0.00 | $0 | 139,021 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M · derivative | 14,595 | $0.00 | $0 | 124,426 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M · derivative | 1,631 | $0.00 | $0 | 122,795 | No | Form 4 |
| Grisenthwaite Richard RoyChief Architect | May 15 | May 19 | M · derivative | 4,352 | $0.00 | $0 | 118,443 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | A | 4,466 | not reported | not reported | 52,667 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | M | 1,751 | not reported | not reported | 54,418 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | A | 4,444 | not reported | not reported | 58,862 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | M | 1,743 | not reported | not reported | 60,605 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | A | 14,400 | not reported | not reported | 75,005 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | M | 4,706 | not reported | not reported | 79,711 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | F | 15,317 | $209.16 | $3,203,704 | 64,394 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | S | 7,000 | $212.55 | Sale −$1,487,850 | 57,394 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | A · derivative | 5,566 | $0.00 | $0 | 56,182 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | M · derivative | 1,751 | $0.00 | $0 | 54,431 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | M · derivative | 1,743 | $0.00 | $0 | 52,688 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | May 15 | May 19 | M · derivative | 4,706 | $0.00 | $0 | 47,982 | Yes | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | M | 3,588 | not reported | not reported | 23,654 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | M | 862 | not reported | not reported | 24,516 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | M | 2,308 | not reported | not reported | 26,824 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | F | 3,383 | $209.16 | $707,588 | 23,441 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | A · derivative | 16,645 | $0.00 | $0 | 38,440 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | A · derivative | 69,570 | $0.00 | $0 | 108,010 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | M · derivative | 3,588 | $0.00 | $0 | 104,422 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | M · derivative | 862 | $0.00 | $0 | 103,560 | No | Form 4 |
| Bartels Laura KathleenChief Accounting Officer | May 15 | May 19 | M · derivative | 2,308 | $0.00 | $0 | 101,252 | No | Form 4 |
| Abbey WilliamChief Commercial Officer | Apr 24 | May 19 | S | 1,577 | $221.99 | Sale −$350,078 | 55,817 | Yes | Form 4 |
| Abbey WilliamChief Commercial Officer | Apr 23 | May 19 | S | 1,577 | $199.00 | Sale −$313,823 | 54,240 | Yes | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 836 | $207.77 | Sale −$173,696 | 51,125 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 1,849 | $208.68 | Sale −$385,849 | 49,276 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 5,353 | $209.52 | Sale −$1,121,561 | 43,923 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 9,815 | $210.53 | Sale −$2,066,352 | 34,108 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 10,674 | $211.46 | Sale −$2,257,124 | 23,434 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 11,197 | $212.51 | Sale −$2,379,474 | 12,237 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 7,371 | $213.59 | Sale −$1,574,372 | 4,866 | No | Form 4 |
| Collins SpencerChief Legal Officer | May 11 | May 13 | S | 4,866 | $214.41 | Sale −$1,043,319 | not reported | No | Form 4 |
| Child JasonChief Financial Officer | Apr 22 | Apr 23 | S | 21,280 | $180.00 | Sale −$3,830,400 | 153,426 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Apr 14 | Apr 16 | S | 5,646 | $160.57 | Sale −$906,578 | 277,333 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Apr 14 | Apr 16 | S | 3,483 | $161.21 | Sale −$561,494 | 273,850 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Apr 14 | Apr 16 | S | 170 | $163.00 | Sale −$27,710 | 273,680 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 26 | Mar 27 | S | 200 | $163.15 | Sale −$32,630 | 290,765 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 26 | Mar 27 | S | 600 | $162.19 | Sale −$97,314 | 290,165 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 26 | Mar 27 | S | 1,842 | $161.47 | Sale −$297,428 | 288,323 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 26 | Mar 27 | S | 5,344 | $160.41 | Sale −$857,231 | 282,979 | Yes | Form 4 |
| Child JasonChief Financial Officer | Mar 25 | Mar 27 | S | 21,280 | $148.37 | Sale −$3,157,314 | 174,706 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 25 | Mar 27 | S | 1,092 | $163.35 | Sale −$178,378 | 313,740 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 25 | Mar 27 | S | 4,830 | $162.62 | Sale −$785,455 | 308,910 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 25 | Mar 27 | S | 6,196 | $161.47 | Sale −$1,000,468 | 302,714 | Yes | Form 4 |
| Haas Rene A.Chief Executive Officer | Mar 25 | Mar 27 | S | 11,749 | $160.22 | Sale −$1,882,425 | 290,965 | Yes | Form 4 |