# Markstream Ventures Limited

## Details

- **Company number:** [17534704](https://find-and-update.company-information.service.gov.uk/company/17534704)
- **Status:** Active
- **Type:** Private limited company
- **Incorporated:** 22 Oct 2026
- **Registered office:** BURFIELD HOUSE 85 CHURCH GREEN ROAD, BLETCHLEY, MILTON KEYNES, MK3 6DA
- **Nature of business:** [58290](/sic/58290) Other software publishing, [62012](/sic/62012) Business and domestic software development, [63110](/sic/63110) Data processing, hosting and related activities
- **Corporate group:** [Markstream Limited](/group/111166) (3 companies)


## Previous names

- Demyst Ai Limited (until 29 Oct 2026)



## Officers

| Name | Role | Appointed | Resigned |
|---|---|---|---|
| TSAPPIS, Oliver John William | director | 22 Oct 2026 |  |
| TSAPPIS, Neil John Alfred | director | 22 Oct 2026 |  |



## Control

| Name | Nature of control | Notified | Ceased |
|---|---|---|---|
| Markstream Limited | ownership-of-shares-75-to-100-percent, voting-rights-75-to-100-percent, right-to-appoint-and-remove-directors | 22 Oct 2026 |  |




## Owned by

Markstream Ventures Limited → [Markstream Limited](/company/03987984)




## Directors' other companies

- [TSAPPIS, Neil John Alfred](/person/9937575) - director at [Markstream Limited](/company/03987984)
- [TSAPPIS, Neil John Alfred](/person/9937575) - director at [Difference Dynamics Limited](/company/15633961)
- [TSAPPIS, Neil John Alfred](/person/9937575) - director at [Demyst Consulting Limited](/company/04115352)
- [TSAPPIS, Neil John Alfred](/person/9937575) - director at [Demyst Ai Limited](/company/17553586)



## Companies at the same address

- [Demyst Ai Limited](/company/17553586) (17553586)
- [Markstream Limited](/company/03987984) (03987984)