David Portnoy - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
David Portnoy is a corporate insider tracked by InsiderAlpha. No SEC Form 4 filings recorded in the last 90 days. Lifetime open-market purchases: $552K. Historical track record: 3/5 stars across 25 tracked purchases.
Profile
David Portnoy is a corporate insider at CRYO CELL INTERNATIONAL INC (CCEL). Portnoy has reported 19 insider filings with the SEC since 2025. The most recent filing was in January 2026.
| Role | Chairman, Co-CEO |
|---|---|
| Notability | 20/100 |
Board memberships
- CRYO CELL INTERNATIONAL INC
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 | 25 |
| Purchases with forward-return data | 25 |
| 30-day win rate | 56% |
| 90-day win rate | 8% |
| Avg 5-day return | +3.47% |
| Avg 30-day return | +3.00% |
| Avg 90-day return | -6.57% |
| Best 30-day return | +13.36% |
Trading Pattern
InsiderAlpha's records for David Portnoy go back to 2025: 11 primary Form 4 filings, an average of 5.5 per year. The typical open-market purchase is $22K (25 buys totaling $552K). The largest single buy on record is $49K of CCEL 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 David Portnoy 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.
- Chairman, Co-CEO at CRYO CELL INTERNATIONAL INC (CCEL) - 11 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2025-11-24 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 273 | $4.10 | $1K |
| 2025-11-24 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 406 | $4.09 | $2K |
| 2025-11-24 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 677 | $4.09 | $3K |
| 2025-11-24 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 800 | $4.04 | $3K |
| 2025-11-24 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 289 | $4.00 | $1K |
| 2025-11-19 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 1.9K | $4.08 | $8K |
| 2025-11-19 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 640 | $4.09 | $3K |
| 2025-11-19 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 1.4K | $4.00 | $6K |
| 2025-11-12 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 2.0K | $4.12 | $8K |
| 2025-11-12 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 2.5K | $4.13 | $10K |
| 2025-11-12 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 1.0K | $4.18 | $4K |
| 2025-11-04 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 5.0K | $4.40 | $22K |
| 2025-11-04 | CCEL | CRYO CELL INTERNATIONAL INC | A - Grant or award | 4.7K | $4.45 | $21K |
| 2025-09-18 | CCEL | CRYO CELL INTERNATIONAL INC | P - Open-market purchase | 1.8K | $4.49 | $8K |
| 2025-09-18 | CCEL | CRYO CELL INTERNATIONAL INC | P - Open-market purchase | 3.4K | $4.46 | $15K |
| 2025-09-18 | CCEL | CRYO CELL INTERNATIONAL INC | P - Open-market purchase | 5.6K | $4.43 | $25K |
| 2025-09-18 | CCEL | CRYO CELL INTERNATIONAL INC | P - Open-market purchase | 6.4K | $4.46 | $29K |
| 2025-09-10 | CCEL | CRYO CELL INTERNATIONAL INC | P - Open-market purchase | 2.1K | $4.48 | $9K |
| 2025-09-10 | CCEL | CRYO CELL INTERNATIONAL INC | P - Open-market purchase | 7.2K | $4.48 | $32K |
| 2025-09-10 | CCEL | CRYO CELL INTERNATIONAL INC | P - Open-market purchase | 7.2K | $4.42 | $32K |
Most Active Insiders Right Now
David Portnoy has no recent co-filers at the same companies, so here are the insiders with the largest open-market activity across the market in the last 90 days.
- MetLife Investment Management, LLC - $1600000.00B of FINS open-market activity in the last 90 days
- Magnetar Financial LLC - $16357.48B of CRWV open-market activity in the last 90 days
- Marianne Okland - $18.46B of STNG open-market activity in the last 90 days
- VisionWave Holdings, Inc. - $14.13B of SVRE open-market activity in the last 90 days
- Vanessa Allen Sutherland - $7.44B of PSX open-market activity in the last 90 days
- AI Alpine (Luxembourg) S.a.r.l. - $2.69B of INIO open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Charles A. Davis
- Deep Track Biotechnology Master Fund, Ltd.
- Robert E. Dixon
- Romeo R. Dizon
- Kevin Michael Donahue
- DONEGAL MUTUAL INSURANCE CO
- DORCHESTER MINERALS OPERATING LP
- Robert W. Duggan
Frequently Asked Questions
Who is David Portnoy?
David Portnoy is a corporate insider at CRYO CELL INTERNATIONAL INC (CCEL). Portnoy has reported 19 insider filings with the SEC since 2025. The most recent filing was in January 2026.…
Has David Portnoy been buying or selling stock?
Recorded transactions: 25 open-market purchases ($552K) and 0 open-market sales across all tracked filings.
How accurate is David Portnoy's historical track record?
Across 25 tracked purchases, David Portnoy averaged +3.0% avg 30-day return with a 56% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
Where can I see all of David Portnoy'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
Open the live David Portnoy profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.