eFFECTOR Therapeutics, Inc.
eFFECTOR Therapeutics, Inc. (EFTR) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · EFTR · as of Jun 8, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
2
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
eFFECTOR Therapeutics, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
EFTR insider buying and selling by quarter
EFTR insider selling · EFTR insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Recent insider transactions
EFTR executive sell shares · EFTR board member insider trading · EFTR insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| May 15, 2024 | Byrnes Michael CFO | Award | 1,387 | $2K | Form 4 |
| May 15, 2024 | WORLAND STEPHEN T CEO · Director | Award | 1,806 | $3K | Form 4 |
| Nov 27, 2023 | SR ONE CAPITAL MANAGEMENT, LLC 10 percent owner | Sale | 430,578 | $261K | Form 4 |
| Nov 27, 2023 | SR ONE CAPITAL MANAGEMENT, LLC 10 percent owner | Sale | 178,585 | $108K | Form 4 |
| Nov 15, 2023 | WORLAND STEPHEN T CEO · Director | Award | 5,979 | $3K | Form 4 |
| Nov 15, 2023 | Byrnes Michael CFO | Award | 4,524 | $2K | Form 4 |
| Aug 11, 2023 | WORLAND STEPHEN T CEO · Director | Option | 33,799 | $18K | Form 4 |
| May 15, 2023 | WORLAND STEPHEN T CEO · Director | Award | 6,401 | $3K | Form 4 |
| May 15, 2023 | Byrnes Michael CFO | Award | 4,863 | $2K | Form 4 |
| Nov 15, 2022 | Byrnes Michael CFO | Award | 4,651 | $2K | Form 4 |
| Nov 15, 2022 | WORLAND STEPHEN T CEO | Award | 6,047 | $3K | Form 4 |
| Oct 4, 2022 | Ehrlich Christopher B Director | Purchase | 346 | $197 | Form 4 |
| Sep 26, 2022 | Ehrlich Christopher B Director | Purchase | 18,867 | $10K | Form 4 |
| Aug 1, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 25,896 | $20K | Form 4 |
| Aug 2, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 27,348 | $22K | Form 4 |
| Aug 3, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 57,580 | $46K | Form 4 |
| Aug 1, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 807 | $634 | Form 4 |
| Aug 2, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 853 | $680 | Form 4 |
| Aug 1, 2022 | ROOT JONATHAN D Director | Sale | 1,796 | $1K | Form 4 |
| Aug 3, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 1,796 | $1K | Form 4 |
| Jul 28, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 31,533 | $28K | Form 4 |
| Jul 28, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 984 | $878 | Form 4 |
| Jul 28, 2022 | ROOT JONATHAN D Director | Sale | 984 | $878 | Form 4 |
| Jul 25, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 2,210 | $2K | Form 4 |
| Jul 26, 2022 | Presidio Management Group X LLC 10 percent owner | Sale | 2,691 | $2K | Form 4 |
SR ONE CAPITAL MANAGEMENT, LLC
10 percent owner
Date
Nov 27
Shares
430,578
Price
$0.61
Value
$261K
SR ONE CAPITAL MANAGEMENT, LLC
10 percent owner
Date
Nov 27
Shares
178,585
Price
$0.61
Value
$108K
WORLAND STEPHEN T
CEO · Director
Date
Aug 11
Shares
33,799
Price
$0.52
Value
$18K
Ehrlich Christopher B
Director
Date
Sep 26
Shares
18,867
Price
$0.55
Value
$10K
Presidio Management Group X LLC
10 percent owner
Date
Aug 1
Shares
25,896
Price
$0.79
Value
$20K
Presidio Management Group X LLC
10 percent owner
Date
Aug 2
Shares
27,348
Price
$0.80
Value
$22K
Presidio Management Group X LLC
10 percent owner
Date
Aug 3
Shares
57,580
Price
$0.80
Value
$46K
Presidio Management Group X LLC
10 percent owner
Date
Aug 1
Shares
807
Price
$0.79
Value
$634
Presidio Management Group X LLC
10 percent owner
Date
Aug 2
Shares
853
Price
$0.80
Value
$680
Presidio Management Group X LLC
10 percent owner
Date
Aug 3
Shares
1,796
Price
$0.80
Value
$1K
Presidio Management Group X LLC
10 percent owner
Date
Jul 28
Shares
31,533
Price
$0.89
Value
$28K
Presidio Management Group X LLC
10 percent owner
Date
Jul 28
Shares
984
Price
$0.89
Value
$878
Presidio Management Group X LLC
10 percent owner
Date
Jul 25
Shares
2,210
Price
$0.93
Value
$2K
Presidio Management Group X LLC
10 percent owner
Date
Jul 26
Shares
2,691
Price
$0.90
Value
$2K
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About EFTR insider trading
EFTR insider trades
eFFECTOR Therapeutics, Inc. (EFTR) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including EFTR. Over the past 12 months, 0 insiders have filed transactions with the SEC. EFTR insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For eFFECTOR Therapeutics, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
EFTR insider trading · 5 questionsThe insiders of eFFECTOR Therapeutics, Inc. (EFTR) include executives and directors such as EFTR, among others. Over the past 12 months, 0 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026