Total buying$00 buys
REGN
REGENERON PHARMACEUTICALS, INC.
NasdaqHealthcarePharmaceutical Preparations
Insider activity for last month from 09/19 to 10/19.
How these metrics are calculated
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 selling$3.20M27 sells
Net open-market−$3.20MBuying minus selling
Active insiders1Distinct reporting owners
Insider activity report
Calendar-month buckets within the selected date range
Latest filing: Oct 15, 2026
Open-market transaction mix · 27 transactions in the selected period
Code A includes awards, grants and other acquisitions; these are not open-market buys. A rolling period can include partial calendar months.
View exact monthly counts and disclosed values
| Month | Buys | Sells | Awards (A) | Buy value | Sell value | Net P/S value |
|---|---|---|---|---|---|---|
| Sep 2026 | 0 | 0 | 0 | $0 | $0 | $0 |
| Oct 2026 | 0 | 27 | 0 | $0 | $3.20M | -$3.20M |
Distinct insiders active
Reporting-owner CIKs by month · peak Oct 2026 (1)Sep 2026Oct 2026
Largest insider activity
By absolute net disclosed value · current transaction page- MJ-$3.0M
REGN transaction history
Newest filings · 20 transactions per pageLatest insider transactions
Form 4 filings from last month.| Company | Insider | Activity | Disclosed value | Filed (ET) |
|---|---|---|---|---|
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | $0View disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$39.0kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$361kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$296kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$353kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$29.5kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$51.2kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$291kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$93.7kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$173kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$163kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$218kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$9.24kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$97.7kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$80.6kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$147kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$213kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$207kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$167kView disclosure → | |
REGNREGENERON PHARMACEUTICALS, INC. | Murphy Andrew JCSO | S · sale10b5-1 detectedSEC filing ↗ | -$19.0kView disclosure → |
Filing-only signals
Deterministic matches in the selected period
Filing detail checks
Secondary metrics for the selected periodTransaction codes
By Form 4 transaction code in selected period30transactionstxns
- S · Open-market sells · dominant27 · 90%
- M · Option exercise2 · 7%
- F · Tax withholding1 · 3%
Activity by reported role
A joint filing can contribute to multiple rolesCSO30
Reported Holdings After
Separated by insider, security, and ownership type
Murphy Andrew JCommon Stock · Direct
47,833Oct 14, 2026
Murphy Andrew JNon-Qualified Stock Option (right to buy) · Direct
17,000Oct 13, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Current transaction page only · each cell is a filing date · buys green, sells redSep 19 → Oct 19
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REGENERON PHARMACEUTICALS, INC. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at REGENERON PHARMACEUTICALS, INC.?
MURPHY ANDREW J.
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?
Murphy Andrew J reported a sale on Oct 14, 2026 valued at $39.0k. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $3,204,375.76. 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.