Quick Takeaways
- Eric J. Hyllengren has 2 issuer positions tracked on this page.
- Estimated disclosed ownership value: $393,448.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Eric J. Hyllengren
- Location
- Thousand Oaks, CA
- Summary
- The estimated net worth of Eric J. Hyllengren is at least $393,448 dollars as of 02 Apr 2026. Eric J. Hyllengren is the Former EVP, CFO & COO of Atara Biotherapeutics, Inc. and owns shares of Atara Biotherapeutics, Inc. (ATRA) stock worth about $393.4K.
- Signature
- /s/ Kim Davis, Attorney-in-Fact
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Eric J. Hyllengren and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: Atara Biotherapeutics, Inc. ($393,448).
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of Eric J. Hyllengren
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| ATRA | Atara Biotherapeutics, Inc. | Former EVP, CFO & COO | $393,448 | 31 Mar 2025 | ||
| ZURA | Zura Bio Ltd | Chief Financial Officer | 01 Apr 2026 |
Insider Transactions Reported by Eric J. Hyllengren:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.