Nicolas Karmelek - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Nicolas Karmelek has filed 1 SEC Form 4 filing across 1 company in the last 90 days - buying. Lifetime open-market purchases: $421K. Historical track record: 3/5 stars across 5 tracked purchases.
Profile
Nicolas Karmelek holds the role of EVP and CRO at Avidia Bancorp, Inc. (AVBC). Karmelek has reported 3 insider filings with the SEC since 2025. The most recent filing was in May 2026.
| Role | EVP and CRO |
|---|---|
| Notability | 30/100 |
Board memberships
- Avidia Bancorp, Inc.
Reported roles
- EVP and CRO
Track Record
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realised performance after each tracked open-market purchase.
| InsiderAlpha rating | ★★★☆☆ (3/5) |
|---|---|
| Total purchases tracked | 5 |
| Purchases with forward-return data | 5 |
| 30-day win rate | 80% |
| 90-day win rate | 100% |
| Avg 5-day return | -0.10% |
| Avg 30-day return | +1.60% |
| Avg 90-day return | +3.70% |
| Best 30-day return | +6.78% |
Trading Pattern
InsiderAlpha's records for Nicolas Karmelek go back to 2025: 4 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $70K (6 buys totaling $421K). The largest single buy on record is $300K of AVBC in 2025. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Nicolas Karmelek has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- EVP and CRO at Avidia Bancorp, Inc. (AVBC) - 4 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-07-30 | AVBC | Avidia Bancorp, Inc. | P - Open-market purchase | 19 | $19.08 | $363 |
| 2026-07-30 | AVBC | Avidia Bancorp, Inc. | P - Open-market purchase | 14 | $18.92 | $265 |
| 2026-05-05 | AVBC | Avidia Bancorp, Inc. | P - Open-market purchase | 1.2K | $20.76 | $25K |
| 2026-03-03 | AVBC | Avidia Bancorp, Inc. | P - Open-market purchase | 1.1K | $18.59 | $20K |
| 2025-08-07 | AVBC | Avidia Bancorp, Inc. | P - Open-market purchase | 20.8K | $14.44 | $300K |
| 2025-08-07 | AVBC | Avidia Bancorp, Inc. | P - Open-market purchase | 5.2K | $14.35 | $75K |
Companies - Last 90 Days
- Avidia Bancorp, Inc. (AVBC) - 1 filing, last 2026-07-30
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Nicolas Karmelek has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Robert D. Cozzone - $1.06M of AVBC open-market activity in the last 12 months
- Barry H. Jensen - $596K of AVBC open-market activity in the last 12 months
- Jonathan Michael Nelson - $564K of AVBC open-market activity in the last 12 months
- Michael Neil Flanigan - $326K of AVBC open-market activity in the last 12 months
- Michael Dennis Murphy - $290K of AVBC open-market activity in the last 12 months
- Thomas Doane - $255K of AVBC open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Novo Holdings A/S
- William O'Dowd IV
- Eric L. Oliver
- Opaleye Management Inc.
- ORBIMED ADVISORS LLC
- Stephen G. Pagliuca
- Pale Fire Capital SE
- Bhaskar Panigrahi
Frequently Asked Questions
Who is Nicolas Karmelek?
Nicolas Karmelek holds the role of EVP and CRO at Avidia Bancorp, Inc. (AVBC). Karmelek has reported 3 insider filings with the SEC since 2025. The most recent filing was in May 2026.…
How many SEC Form 4 filings has Nicolas Karmelek submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Nicolas Karmelek been buying or selling stock?
Recorded transactions: 6 open-market purchases ($421K) and 0 open-market sales across all tracked filings.
How accurate is Nicolas Karmelek's historical track record?
Across 5 tracked purchases, Nicolas Karmelek averaged +1.6% avg 30-day return with a 80% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
Where can I see all of Nicolas Karmelek's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
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