# ATYR PHARMA INC CALL

ATYR PHARMA INC CALL is a security (CUSIP 002120902) tracked across SEC portfolio filings. 3 institutional managers reported $239K on Form 13F as of 2026-03-31.

## Summary

- Issuer: ATYR PHARMA INC
- Class: CALL
- CUSIP: 002120902
- 13F holders: 3
- 13F value: $239K
- 13F period: 2026-03-31
- N-PORT fund positions: 0

## Top institutional holders (Form 13F)

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [SIMPLEX TRADING, LLC](https://search.stillhousedata.com/firm/153585) | CHICAGO, IL | $121K | — |
| [GROUP ONE TRADING, L.P.](https://search.stillhousedata.com/firm/37484) | CHICAGO, IL | $118K | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/002120902.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.