Latest filingAug 28, 2026Most recent Form 4
ETON
Eton Pharmaceuticals, Inc.
NasdaqHealthcarePharmaceutical Preparations
Insider activity for last month from 08/03 to 09/03. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$1.06B8 sells
Net open-market-$1.06B3 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period12transactions
- S · Open-market sells · dominant8 · 67%
- M · Option exercise4 · 33%
Activity by reported role
A joint filing can contribute to multiple roles16transactions
- Director · dominant5 · 31%
- Chief executive officer4 · 25%
- PRES4 · 25%
- CBO3 · 19%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (3)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeBrynjelsen SeanCommon Stock · Direct
968,536Aug 20, 2026
Maier Paul VCommon Stock · Direct
109,745Aug 28, 2026
Krempa DavidCommon Stock · Direct
62,025Aug 24, 2026
Krempa DavidEmployee Stock Option · Direct
70,000Aug 24, 2026
Maier Paul VEmployee Stock Option · Direct
0Aug 28, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 03 → Sep 03
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Top insiders
By absolute net value across the selected period- BS-$6.1M
- KD-$1.6M
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
ETON transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| ETON | Krempa David | CBO | sale | 25.0k | -$162M | S | −2.2% | 08/24 | 08/24 | |
| ETON | BRYNJELSEN SEAN | PRESCEO | sale | 7.34k | -$45.6M | S | +0.9% | 08/20 | 08/20 | |
| ETON | BRYNJELSEN SEAN | PRESCEO | sale | 36.3k | -$222M | S | +0.9% | 08/20 | 08/20 | |
| ETON | BRYNJELSEN SEAN | PRESCEO | sale | 47.3k | -$284M | S | +0.9% | 08/20 | 08/20 | |
| ETON | BRYNJELSEN SEAN | PRESCEO | sale | 8.97k | -$56.2M | S | +0.9% | 08/20 | 08/19 |
Eton Pharmaceuticals, Inc. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Eton Pharmaceuticals, Inc.?
MAIER PAUL V, Krempa David, BRYNJELSEN SEAN.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Maier Paul V reported a sale on Aug 28, 2026 valued at $790k. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $10,668,095.05. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.