# SELLAS LIFE SCIENCES GROUP I COM NEW

SELLAS LIFE SCIENCES GROUP I COM NEW is a security (CUSIP 81642T209) tracked across SEC portfolio filings. 179 institutional managers reported $329.2M on Form 13F as of 2026-06-30; 11 registered fund positions totaling $25.0M via N-PORT as of 2026-05-31.

## Summary

- Issuer: SELLAS LIFE SCIENCES GROUP I
- Class: COM NEW
- CUSIP: 81642T209
- Asset category: EC
- 13F holders: 179
- 13F value: $329.2M
- 13F period: 2026-06-30
- N-PORT fund positions: 11
- N-PORT value: $25.0M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 179 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $51.6M | 12,198,410 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | BALA CYNWYD, PA | $38.0M | 397,056 |
| STATE STREET CORP | BOSTON, MA | $35.5M | 8,396,356 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $31.9M | 8,467,400 |
| [CITADEL ADVISORS LLC](https://search.stillhousedata.com/firm/148826) | MIAMI, FL | $20.7M | 64,641 |
| [DAGCO, INC.](https://search.stillhousedata.com/firm/106950) | WESTLAKE, OH | $18.2M | 1,232,433 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $16.6M | 3,912,606 |
| [MARSHALL WACE, LLP](https://search.stillhousedata.com/firm/160885) | LONDON, X0 | $8.6M | 2,037,162 |
| Bank of New York Mellon Corp | NEW YORK, NY | $7.8M | 530,025 |
| JONES FINANCIAL COMPANIES LLLP | DES PERES, MO | $7.3M | 1,675,077 |
| MORGAN STANLEY | NEW YORK, NY | $5.7M | 1,336,293 |
| NORTHERN TRUST CORP | CHICAGO, IL | $5.4M | 1,275,984 |
| CITIGROUP INC | NEW YORK, NY | $4.8M | 326,591 |
| [Everhart Financial Group, Inc.](https://search.stillhousedata.com/firm/107091) | Dublin, OH | $4.3M | 288,018 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $4.2M | 159,524 |

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $8.2M | 4.69% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $8.0M | 0.99% |
| [VANGUARD U.S. MOMENTUM FACTOR ETF](https://search.stillhousedata.com/fund/S000061302) | VANGUARD WELLINGTON FUND | $5.6M | 30.64% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $1.2M | 2.45% |
| [Fidelity Nasdaq Composite Index ETF](https://search.stillhousedata.com/fund/S000006011) | Fidelity Commonwealth Trust | $600K | 0.55% |
| [Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000048296) | Goldman Sachs ETF Trust | $478K | 4.84% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $390K | 0.07% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $371K | 0.12% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $102K | 2.43% |
| [TIAA Separate Account VA-1 - Stock Index Account](https://search.stillhousedata.com/fund/S000005098) | TIAA Separate Account VA-1 | $14K | 0.11% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $140 | 0.00% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/81642t209.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.