Oxford Science Enterprises Holdings takes lead stake in Pqshield Ltd
Published
Oxford Science Enterprises Holdings Limited has taken a major position in Pqshield Ltd, according to a recent confirmation statement (period ending 29 May 2026). The entity joined the cap table with 153,724 shares, including 42,774 Series B and 36,773 Series Seed I shares. This new entrant, which also backs Refeyn Ltd and Living Optics Limited, appears to have replaced Oxford Science Enterprises PLC, which exited the cap table after previously holding 150,788 shares.
Based in Summertown and founded in 2018, Pqshield Ltd specializes in post-quantum cryptography. The company provides quantum-resistant hardware and software solutions to protect digital infrastructure for industries such as automotive, telecommunications, and aerospace.
The filing also shows Maddox Street Holdings Limited joining the cap table with 19,320 shares, replacing F39 Limited. Maddox Street Holdings Limited is also a shareholder in Osler Diagnostics Limited. Additionally, BY Venture Partners III (GP) S.A.R.L. entered the cap table with 2,936 Series B shares. These new entries may signal a recent round of investment.
Existing shareholders that remain on the cap table include Addition Three, L.P. with 173,536 shares and Kindred Capital II SCSP with 46,245 shares. Braavos Capital GP Limited and L&G UK Universities Ventures LP also maintain their holdings of 39,838 and 38,262 shares respectively. Legal & General Capital Investments Limited has exited the cap table.
Shareholder data
Source: Companies House confirmation statement (CS01) — period to , filed .
Changes in this confirmation statement
| Type | Shareholder | Shares | Change | Share classes |
|---|---|---|---|---|
| Exited | OXFORD SCIENCE ENTERPRISES PLC | 150,788 | — | SERIES B 39,838 SERIES SEED I 36,773 SERIES A 32,120 SERIES SEED II 27,057 ORDINARY 15,000 |
| Exited | F39 LIMITED | 19,320 | — | SERIES SEED I 9,490 SERIES SEED II 6,013 SERIES A 3,817 |
| Exited | LEGAL & GENERAL CAPITAL INVESTMENTS LIMITED | 0 | — | SERIES B 0 |
| New shareholder | OXFORD SCIENCE ENTERPRISES HOLDINGS LIMITED | 153,724 | — | SERIES B 42,774 SERIES SEED I 36,773 SERIES A 32,120 SERIES SEED II 27,057 ORDINARY 15,000 |
| New shareholder | MADDOX STREET HOLDINGS LIMITED | 19,320 | — | SERIES SEED I 9,490 SERIES SEED II 6,013 SERIES A 3,817 |
| New shareholder | BY VENTURE PARTNERS III (GP) S.A.R.L. | 2,936 | — | SERIES B 2,936 |
Current shareholders (11)
| Shareholder | Total shares | Share classes |
|---|---|---|
| ADDITION THREE, L.P. | 173,536 | SERIES A 102,396 SERIES B 71,140 |
| OXFORD SCIENCE ENTERPRISES HOLDINGS LIMITED | 153,724 | ORDINARY 15,000 SERIES A 32,120 SERIES B 42,774 SERIES SEED I 36,773 SERIES SEED II 27,057 |
| KINDRED CAPITAL II SCSP | 46,245 | SERIES A 1,149 SERIES SEED II 45,096 |
| BRAAVOS CAPITAL GP LIMITED A/C BCIILP | 39,838 | SERIES B 39,838 |
| L&G UK UNIVERSITIES VENTURES LP | 38,262 | SERIES B 38,262 |
| CRANE GP LLP | 28,464 | SERIES A 1,740 SERIES SEED II 26,724 |
| MADDOX STREET HOLDINGS LIMITED | 19,320 | SERIES A 3,817 SERIES SEED I 9,490 SERIES SEED II 6,013 |
| CTTV INVESTMENTS LLC | 17,073 | SERIES B 17,073 |
| THE CHANCELLOR, MASTERS AND SCHOLARS OF THE UNIVERSITY OF OXFORD | 15,000 | SERIES SEED II 15,000 |
| BY VENTURE PARTNERS III (GP) S.A.R.L. | 2,936 | SERIES B 2,936 |
| CRANE FOUNDER PARTNER LP | 354 | SERIES A 21 SERIES SEED II 333 |
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