---
title: "PORTFOLIO SERVICES LTD. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/a9869783-cdfb-5035-9d05-ed2e2eefe9ae
json: https://whiteintel.dev/api/public/dossier/a9869783-cdfb-5035-9d05-ed2e2eefe9ae
identifier: sec:0001488856
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# PORTFOLIO SERVICES LTD.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001488856`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/a9869783-cdfb-5035-9d05-ed2e2eefe9ae  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/a9869783-cdfb-5035-9d05-ed2e2eefe9ae  

## Ownership & control

### Holdings / subsidiaries

- **Marker Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/1cdd4569-686b-5a8f-a51c-7a80d34ee9f8
- **iBio, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/da01e9d5-447d-5f41-b32c-9f2c4895e445
- **Cyclacel Pharmaceuticals, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/2b640b7c-3e03-51c2-81e3-83fb45882268
- **Avid Bioservices, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/19c3b63d-c9a8-5c59-bb1c-78dad3b51f6a
- **Vericel Corp** (tenpercentowner) — https://whiteintel.dev/entity/51a92706-77bb-58b9-9eed-4031fc1723f6
- **CYTOKINETICS INC** (tenpercentowner) — https://whiteintel.dev/entity/0eb385f6-49c6-5406-ba0c-13179011e29b

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **PORTFOLIO SERVICES LTD.**. Human view: https://whiteintel.dev/entity/a9869783-cdfb-5035-9d05-ed2e2eefe9ae · Structured JSON: https://whiteintel.dev/api/public/dossier/a9869783-cdfb-5035-9d05-ed2e2eefe9ae._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._