Quick Takeaways
- eFFECTOR Therapeutics, Inc. has 21 insiders with reported activity on this page.
- No net insider buy/sell flow is currently reported for the last year.
- Recent transaction rows are not currently available.
Insider Transactions Reported by 21 Insiders of eFFECTOR Therapeutics, Inc.
- Location
- Solana Beach, CA
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 14 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 |
eFFECTOR Therapeutics, Inc. executives and other stock owners filed with the SEC include:
Top shareholders of eFFECTOR Therapeutics, 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 |
|---|---|---|---|---|---|---|---|---|
| Carlyle Group Inc. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
4,822,114
|
$2,924,612 | — | 01 Aug 2022 | |
| Jonathan D. Root |
3/4/5
|
Director, 10%+ Owner |
—
class O/S missing
|
4,524,562
|
$2,744,147 | — | 02 Dec 2021 | |
| Column Group II GP, LP |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
4,309,329
|
$2,613,608 | — | 25 Aug 2021 | |
| Presidio Management Group X LLC |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
4,109,509
|
$2,492,418 | — | 01 Aug 2022 | |
| Locust Walk Sponsor, LLC |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
4,056,250
|
$2,460,116 | — | 25 Aug 2021 | |
| SR ONE CAPITAL MANAGEMENT, LLC |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
1,821,415
|
$1,104,688 | — | 27 Nov 2023 | |
| Stephen T. Worland |
3/4/5
|
Chief Executive Officer, Director |
—
mixed-class rows
|
114,987
mixed-class rows
|
$58,883 | — | 15 May 2024 | |
| Caroline M. Loewy |
3/4/5
|
Director |
—
mixed-class rows
|
9,847
mixed-class rows
|
$5,487 | — | 13 Jun 2024 | |
| Michael Byrnes |
3/4/5
|
Chief Financial Officer |
—
mixed-class rows
|
43,117
mixed-class rows
|
$5,246 | — | 15 May 2024 | |
| Alana B. McNulty |
3/4/5
|
Chief Business Officer |
—
class O/S missing
|
150,000
|
— | — | 20 Jun 2022 | |
| Mayank Gandhi |
3/4/5
|
Chief Business Officer |
—
class O/S missing
|
150,000
|
— | — | 17 Jan 2023 | |
| Premal Patel |
3/4/5
|
Chief Medical Officer |
—
class O/S missing
|
150,000
|
— | — | 20 Jan 2022 | |
| Abingworth LLP |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
40,000
|
— | — | 06 Oct 2021 | |
| Laurence Lasky |
3/4/5
|
Director |
—
class O/S missing
|
40,000
|
— | — | 06 Oct 2021 | |
| Douglas J. Warner |
3/4/5
|
Chief Medical Officer |
—
class O/S missing
|
25,000
|
— | — | 19 Feb 2024 | |
| John W. Smither |
3/4/5
|
Director |
—
class O/S missing
|
20,000
|
— | — | 22 Jun 2023 | |
| Barbara Klencke |
3/4/5
|
Director |
—
class O/S missing
|
800
|
— | — | 13 Jun 2024 | |
| Brian M. Gallagher Jr. |
3/4/5
|
Director |
—
class O/S missing
|
800
|
— | — | 13 Jun 2024 | |
| Christopher B. Ehrlich |
3/4/5
|
Director |
—
class O/S missing
|
800
|
— | — | 13 Jun 2024 | |
| Elizabeth Bhatt |
3/4/5
|
Director |
—
class O/S missing
|
800
|
— | — | 13 Jun 2024 | |
| Kristen Harrington-Smith |
3/4/5
|
Director |
—
class O/S missing
|
800
|
— | — | 13 Jun 2024 |
Recent Insider Transactions by Companies or Individuals for eFFECTOR Therapeutics, 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* An asterisk sign (*) next to the price indicates that the price is likely invalid.