Quick Takeaways
- HilleVax, Inc. has 16 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are available for direct filing-level review.
Insider Transactions Reported by 16 Insiders of HilleVax, Inc.
- Location
- Boston, MA
What Changed
- No meaningful buy/sell imbalance is currently visible in the one-year window.
- Activity will update as new Forms 3/4/5 are filed.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsInsider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 02 May 2025.
Buys
$0
Shares: 0
Insiders: 0
Sells
$0
Shares: 0
Insiders: 0
Net
$0
Shares: 0
Insiders: 0
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
HilleVax, Inc. executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Patrick J. Heron | Director | $16,249,818 | Mixed | 23 Jun 2025 | ||
| David A. Socks | CFO & Chief Business Officer | $11,920,353 | Mixed | 28 Apr 2022 | ||
| Astrid Borkowski | Chief Medical Officer | $3,208,660 | Mixed | 08 Feb 2024 | ||
| Sean McLoughlin | Chief Operating Officer | $21,225 | Filing P/S | 28 Mar 2024 | ||
| TAKEDA PHARMACEUTICAL CO LTD | 10%+ Owner | $0 | Mixed | 17 Sep 2025 | ||
| Frazier Life Sciences X, L.P. | 10%+ Owner | $0 | Mixed | 17 Sep 2025 | ||
| Julie L. Gerberding | Director | $0 | Mixed | 17 Sep 2025 | ||
| Aditya Kohli | Director | $0 | Mixed | 17 Sep 2025 | ||
| Shane Maltbie | Chief Financial Officer | $0 | Mixed | 17 Sep 2025 | ||
| Gary Dubin | Director | $0 | Mixed | 17 Sep 2025 | ||
| Jeryl L. Hilleman | Director | $0 | Mixed | 17 Sep 2025 | ||
| Robert Hershberg | President and CEO, Director | $0 | Mixed | 17 Sep 2025 | ||
| Shelley Chu | Director | $0 | Mixed | 17 Sep 2025 | ||
| Jaime Sepulveda | Director | $0 | Mixed | 17 Sep 2025 | ||
| Nanette Cocero | Director | $0 | Mixed | 17 Sep 2025 | ||
| Susan Michele Silbermann | Director | Mixed | 19 Aug 2022 |
Top shareholders of HilleVax, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Patrick J. Heron |
3/4/5
|
Director |
—
mixed-class rows
|
8,575,036
mixed-class rows
|
$16,249,818 | — | 23 Jun 2025 | |
| David A. Socks |
3/4/5
|
CFO & Chief Business Officer |
—
class O/S missing
|
769,055
|
$11,920,353 | — | 28 Apr 2022 | |
| Astrid Borkowski |
3/4/5
|
Chief Medical Officer |
—
mixed-class rows
|
284,744
mixed-class rows
|
$3,208,660 | — | 08 Feb 2024 | |
| Sean McLoughlin |
3/4/5
|
Chief Operating Officer |
—
mixed-class rows
|
251,250
mixed-class rows
|
$21,225 | — | 28 Mar 2024 | |
| Susan Michele Silbermann |
3/4/5
|
Director |
—
class O/S missing
|
25,000
|
— | — | 19 Aug 2022 | |
| Jaime Sepulveda |
3/4/5
|
Director |
—
class O/S missing
|
22,500
|
— | — | 17 Sep 2025 | |
| Jeryl L. Hilleman |
3/4/5
|
Director |
—
class O/S missing
|
22,500
|
— | — | 17 Sep 2025 | |
| Julie L. Gerberding |
3/4/5
|
Director |
—
class O/S missing
|
22,500
|
— | — | 17 Sep 2025 | |
| Nanette Cocero |
3/4/5
|
Director |
—
class O/S missing
|
22,500
|
— | — | 17 Sep 2025 | |
| Shelley Chu |
3/4/5
|
Director |
—
class O/S missing
|
22,500
|
— | — | 17 Sep 2025 |
Recent Insider Transactions by Companies or Individuals for HilleVax, Inc.
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Takeda Pharmaceutical Co Ltd | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -6,724,000 | 0 | 17 Sep 2025 | See Explanation of Responses | ||
| Frazier Life Sciences X, L.P. | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -17,199 | 0 | 17 Sep 2025 | By Patrick J. Heron | ||
| Frazier Life Sciences X, L.P. | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -8,535,337 | 0 | 17 Sep 2025 | By Frazier Life Sciences X, L.P. | ||
| Robert Hershberg | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -1,101,498 | 0 | 17 Sep 2025 | Direct | ||
| Nanette Cocero | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -17,199 | 0 | 17 Sep 2025 | Direct | ||
| Jeryl L. Hilleman | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -59,224 | 0 | 17 Sep 2025 | Direct | ||
| Shelley Chu | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -17,199 | 0 | 17 Sep 2025 | Direct | ||
| Gary Dubin | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -17,199 | 0 | 17 Sep 2025 | Direct | ||
| Aditya Kohli | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -698,171 | 0 | 17 Sep 2025 | Direct | ||
| Julie L. Gerberding | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -59,224 | 0 | 17 Sep 2025 | Direct | ||
| Jaime Sepulveda | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -59,224 | 0 | 17 Sep 2025 | Direct | ||
| Shane Maltbie | HLVX | Common Stock | Disposition pursuant to a tender of shares in a change of control transaction | -100% | -83,738 | 0 | 17 Sep 2025 | Direct | ||
| Patrick J. Heron | HLVX | Common Stock | Award | 17,199 | 17,199 | 23 Jun 2025 | Direct | |||
| Aditya Kohli | HLVX | Common Stock | Award | 2.53% | 17,199 | 698,171 | 23 Jun 2025 | Direct | ||
| Shelley Chu | HLVX | Common Stock | Award | 17,199 | 17,199 | 23 Jun 2025 | Direct | |||
| Jaime Sepulveda | HLVX | Common Stock | Award | 40.9% | 17,199 | 59,224 | 23 Jun 2025 | Direct | ||
| Nanette Cocero | HLVX | Common Stock | Award | 17,199 | 17,199 | 23 Jun 2025 | Direct | |||
| Julie L. Gerberding | HLVX | Common Stock | Award | 40.9% | 17,199 | 59,224 | 23 Jun 2025 | Direct | ||
| Gary Dubin | HLVX | Common Stock | Award | 17,199 | 17,199 | 23 Jun 2025 | Direct | |||
| Jeryl L. Hilleman | HLVX | Common Stock | Award | 40.9% | 17,199 | 59,224 | 23 Jun 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.