Insider Ledger
REGN insider buying and SEC filings, explained
Regeneron Pharmaceuticals, Inc. · CIK 872589
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Company profile
- Exchanges
- Nasdaq
- Industry (SIC)
- Pharmaceutical Preparations
- State of incorporation
- NY
- Fiscal year end
- Dec 31
- Former names
- REGENERON PHARMACEUTICALS INC
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$281K
Planned sales (10b5-1)
$14.6M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 30, 2026 | Planned (10b5-1) | Kathryn Guarini (Director) sold 400 shares at $900.00 ($360K), marked as a 10b5-1 plan trade. Holdings down 40% to 603 shares. | SEC filing Filed Nov 3, 2026, 4:22 PM ET |
| Oct 30, 2026 | Planned (10b5-1) | Michael S. Brown (Director) sold 1,929 shares at $875.00 ($1.7M), marked as a 10b5-1 plan trade. Holdings down 58% to 1,380 shares. | SEC filing Filed Nov 3, 2026, 4:05 PM ET |
| Oct 30, 2026 | Planned (10b5-1) | Marion McCourt (EVP Commercial) sold 1,132 shares at $869.43 ($984K), marked as a 10b5-1 plan trade. Holdings down 9% to 10,871 shares. | SEC filing Filed Nov 3, 2026, 4:02 PM ET |
| Oct 14, 2026 | Planned (10b5-1) | Andrew J. Murphy (Co-Chief Scientific Officer) sold 4,147 shares at about $772.70 ($3.2M), marked as a 10b5-1 plan trade. Holdings down 8% to 47,833 shares. | SEC filing Filed Oct 15, 2026, 4:02 PM ET |
| Sep 2, 2026 | Planned (10b5-1) | Kathryn Guarini (Director) sold 400 shares at $850.00 ($340K), marked as a 10b5-1 plan trade. Holdings down 40% to 603 shares. | SEC filing Filed Sep 3, 2026 |
| Sep 2–3, 2026 | Planned (10b5-1) | Marion McCourt (EVP Commercial) sold 2,346 shares between Sep 2 and Sep 3 at about $853.56 ($2.0M), marked as a 10b5-1 plan trade. Holdings down 16% to 12,003 shares. | SEC filing Filed Sep 3, 2026 |
| Aug 10, 2026 | Planned (10b5-1) | Kathryn Guarini (Director) sold 400 shares at $800.00 ($320K), marked as a 10b5-1 plan trade. Holdings down 40% to 603 shares. | SEC filing Filed Aug 12, 2026 |
| Aug 10, 2026 | Planned (10b5-1) | Huda Y Zoghbi (Director) sold 800 shares at $800.00 ($640K), marked as a 10b5-1 plan trade. Holdings down 32% to 1,703 shares. | SEC filing Filed Aug 12, 2026 |
| Jul 2, 2026 | Planned (10b5-1) | Arthur F. Ryan (Director) sold 200 shares at about $650.15 ($130K), marked as a 10b5-1 plan trade. Holdings down 1% to 17,303 shares. | SEC filing Filed Jul 7, 2026 |
| May 1, 2026 | Planned (10b5-1) | Arthur F. Ryan (Director) sold 100 shares at about $705.24 ($71K), marked as a 10b5-1 plan trade. Holdings down 1% to 17,503 shares. | SEC filing Filed May 4, 2026 |
| Apr 1, 2026 | Planned (10b5-1) | Arthur F. Ryan (Director) sold 100 shares at about $777.27 ($78K), marked as a 10b5-1 plan trade. Holdings down 1% to 17,603 shares. | SEC filing Filed Apr 3, 2026 |
| Mar 2, 2026 | Planned (10b5-1) | Arthur F. Ryan (Director) sold 100 shares at about $785.50 ($79K), marked as a 10b5-1 plan trade. Holdings down 1% to 17,703 shares. | SEC filing Filed Mar 3, 2026 |
| Feb 19, 2026 | Planned (10b5-1) | Huda Y Zoghbi (Director) sold 1,638 shares at about $781.33 ($1.3M), marked as a 10b5-1 plan trade. Holdings down 49% to 1,703 shares. | SEC filing Filed Feb 23, 2026 |
| Feb 9, 2026 | Planned (10b5-1) | Jason Pitofsky (SVP Controller) sold 2,036 shares at about $778.52 ($1.6M), marked as a 10b5-1 plan trade. Holdings down 32% to 4,272 shares. | SEC filing Filed Feb 11, 2026 |
| Feb 9, 2026 | Planned (10b5-1) | Arthur F. Ryan (Director) sold 100 shares at about $778.53 ($78K), marked as a 10b5-1 plan trade. Holdings down 1% to 17,803 shares. | SEC filing Filed Feb 11, 2026 |
| Jan 7, 2026 | Planned (10b5-1) | Bonnie L Bassler (Director) sold 1,500 shares at about $800.00 ($1.2M), marked as a 10b5-1 plan trade. Holdings down 47% to 1,703 shares. | SEC filing Filed Jan 8, 2026 |
| Nov 20, 2025 | Planned (10b5-1) | Bonnie L Bassler (Director) sold 760 shares at $750.00 ($570K), marked as a 10b5-1 plan trade. Holdings down 33% to 1,548 shares. | SEC filing Filed Nov 24, 2025 |
| Nov 7, 2025 | Sale | Jason Pitofsky (VP Controller) sold 431 shares at $651.43 ($281K). Holdings down 9% to 4,233 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 10, 2025 |
38 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
| Filed | Items | Tag | Source |
|---|---|---|---|
| Oct 30, 2026, 6:50 AM ET 8-K | Earnings released (Item 2.02) | SEC filing |
Red flags are objective triggers only: the item or form filed, never an opinion.
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