REGN
Regeneron Pharmaceuticals Inc
NASDAQ: REGN · HEALTHCARE · BIOTECHNOLOGY
$781.49
-1.48% today
Updated 2026-09-11
Market cap
$80.46B
P/E ratio
19.65
P/S ratio
5.18x
EPS (TTM)
$39.78
Dividend yield
0.46%
52W range
$538 – $859
Volume
0.7M
Regeneron Pharmaceuticals Inc (REGN) Insider transactions
Net insider activity
Net buying (29,292 shares)
Buy transactions
30
Sell transactions
70
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-09-03 | MCCOURT, MARION | EVP Commercial | Sale | 1,131 | $857.39 | $969708.09 |
| 2026-09-02 | MCCOURT, MARION | EVP Commercial | Sale | 1,215 | $850.00 | $1.03M |
| 2026-09-02 | GUARINI, KATHRYN | Director | Sale | 400 | — | — |
| 2026-09-02 | GUARINI, KATHRYN | Director | Sale | 400 | $850.00 | $340000.00 |
| 2026-08-19 | LAROSA, JOSEPH J | EVP General Counsel and Secret | Sale | 12,282 | — | — |
| 2026-08-19 | LAROSA, JOSEPH J | EVP General Counsel and Secret | Buy | 12,282 | $381.92 | $4.69M |
| 2026-08-19 | LAROSA, JOSEPH J | EVP General Counsel and Secret | Sale | 9,019 | $830.15 | $7.49M |
| 2026-08-18 | FENIMORE, CHRISTOPHER R. | EVP Finance CFO | Sale | 6,283 | — | — |
| 2026-08-18 | FENIMORE, CHRISTOPHER R. | EVP Finance CFO | Buy | 6,283 | $381.92 | $2.40M |
| 2026-08-18 | FENIMORE, CHRISTOPHER R. | EVP Finance CFO | Sale | 4,599 | $813.47 | $3.74M |
| 2026-08-10 | ZOGHBI, HUDA Y | Director | Sale | 800 | — | — |
| 2026-08-10 | ZOGHBI, HUDA Y | Director | Sale | 800 | $800.00 | $640000.00 |
| 2026-08-10 | GUARINI, KATHRYN | Director | Sale | 400 | — | — |
| 2026-08-10 | GUARINI, KATHRYN | Director | Buy | 400 | $719.37 | $287748.00 |
| 2026-07-02 | RYAN, ARTHUR F | Director | Sale | 200 | $650.15 | $130030.00 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 24 | $703.46 | $16883.04 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 15 | $702.46 | $10536.90 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 14 | $705.56 | $9877.84 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 7 | $706.74 | $4947.18 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 6 | $709.45 | $4256.70 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 5 | $701.76 | $3508.80 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 4 | $707.40 | $2829.60 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 2 | $710.87 | $1421.74 |
| 2026-05-01 | RYAN, ARTHUR F | Director | Sale | 1 | $712.09 | $712.09 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 40 | $779.71 | $31188.40 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 14 | $775.58 | $10858.12 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 13 | $776.62 | $10096.06 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 9 | $777.42 | $6996.78 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 8 | $774.58 | $6196.64 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 4 | $778.24 | $3112.96 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 3 | $772.76 | $2318.28 |
| 2026-04-01 | RYAN, ARTHUR F | Director | Sale | 1 | $771.32 | $771.32 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 20 | $789.28 | $15785.60 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 11 | $785.48 | $8640.28 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 10 | $783.62 | $7836.20 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 9 | $784.48 | $7060.32 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 7 | $777.46 | $5442.22 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 5 | $779.69 | $3898.45 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 3 | $780.69 | $2342.07 |
| 2026-03-02 | RYAN, ARTHUR F | Director | Sale | 2 | $787.34 | $1574.68 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 1,638 | — | — |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Buy | 1,638 | $376.69 | $617018.22 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 331 | $780.45 | $258328.95 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 298 | $782.10 | $233065.80 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 220 | $783.29 | $172323.80 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 209 | $781.28 | $163287.52 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 208 | $779.55 | $162146.40 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 160 | $784.45 | $125512.00 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 56 | $785.61 | $43994.16 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 53 | $778.47 | $41258.91 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 50 | $775.50 | $38775.00 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 49 | $774.68 | $37959.32 |
| 2026-02-19 | ZOGHBI, HUDA Y | Director | Sale | 4 | $790.00 | $3160.00 |
| 2026-02-09 | RYAN, ARTHUR F | Director | Sale | 57 | $777.56 | $44320.92 |
| 2026-02-09 | RYAN, ARTHUR F | Director | Sale | 12 | $778.53 | $9342.36 |
| 2026-02-09 | RYAN, ARTHUR F | Director | Sale | 10 | $776.59 | $7765.90 |
| 2026-02-09 | RYAN, ARTHUR F | Director | Sale | 5 | $781.48 | $3907.40 |
| 2026-02-09 | RYAN, ARTHUR F | Director | Sale | 3 | $783.34 | $2350.02 |
| 2026-02-09 | RYAN, ARTHUR F | Director | Sale | 2 | $786.29 | $1572.58 |
| 2026-02-09 | RYAN, ARTHUR F | Director | Sale | 1 | $787.82 | $787.82 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 1,000 | — | — |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Buy | 1,000 | $492.00 | $492000.00 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 563 | $778.35 | $438211.05 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 521 | $776.43 | $404520.03 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 391 | $777.51 | $304006.41 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 205 | $779.56 | $159809.80 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 144 | $783.23 | $112785.12 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 75 | $780.06 | $58504.50 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 53 | $785.72 | $41643.16 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 37 | $782.67 | $28958.79 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 26 | $781.37 | $20315.62 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 20 | $775.95 | $15519.00 |
| 2026-02-09 | PITOFSKY, JASON | SVP Controller | Sale | 1 | $784.66 | $784.66 |
| 2026-01-07 | BASSLER, BONNIE L | Director | Sale | 1,500 | — | — |
| 2026-01-07 | BASSLER, BONNIE L | Director | Buy | 1,500 | $374.12 | $561180.00 |
| 2026-01-02 | ZOGHBI, HUDA Y | Director | Buy | 1,962 | — | — |
| 2026-01-02 | ZOGHBI, HUDA Y | Director | Buy | 155 | — | — |
| 2026-01-02 | THOMPSON, CRAIG B. | Director | Buy | 1,962 | — | — |
| 2026-01-02 | THOMPSON, CRAIG B. | Director | Buy | 155 | — | — |
| 2026-01-02 | SING, GEORGE L | Director | Buy | 1,962 | — | — |
| 2026-01-02 | SING, GEORGE L | Director | Buy | 155 | — | — |
| 2026-01-02 | SCHENKEIN, DAVID P | Director | Buy | 1,962 | — | — |
| 2026-01-02 | SCHENKEIN, DAVID P | Director | Buy | 155 | — | — |
| 2026-01-02 | RYAN, ARTHUR F | Director | Buy | 1,962 | — | — |
| 2026-01-02 | RYAN, ARTHUR F | Director | Buy | 155 | — | — |
| 2026-01-02 | POON, CHRISTINE A | Director | Buy | 1,962 | — | — |
| 2026-01-02 | POON, CHRISTINE A | Director | Buy | 155 | — | — |
| 2026-01-02 | GUARINI, KATHRYN | Director | Buy | 1,962 | — | — |
| 2026-01-02 | GUARINI, KATHRYN | Director | Buy | 155 | — | — |
| 2026-01-02 | GOLDSTEIN, JOSEPH L | Director | Buy | 1,962 | — | — |
| 2026-01-02 | GOLDSTEIN, JOSEPH L | Director | Buy | 155 | — | — |
| 2026-01-02 | COLES, N ANTHONY | Director | Buy | 1,962 | — | — |
| 2026-01-02 | COLES, N ANTHONY | Director | Buy | 155 | — | — |
| 2026-01-02 | BROWN, MICHAEL S | Director | Buy | 1,962 | — | — |
| 2026-01-02 | BROWN, MICHAEL S | Director | Buy | 155 | — | — |
| 2026-01-02 | BASSLER, BONNIE L | Director | Buy | 1,962 | — | — |
| 2026-01-02 | BASSLER, BONNIE L | Director | Buy | 155 | — | — |
| 2025-12-31 | YANCOPOULOS, GEORGE | Director, Bd. Co-Chair, President & CSO | Buy | 28,570 | — | — |
| 2025-12-31 | YANCOPOULOS, GEORGE | Director, Bd. Co-Chair, President & CSO | Sale | 28,570 | — | — |
| 2025-12-31 | SCHLEIFER, LEONARD S | Director, Bd. Co-Chair, President & CEO | Buy | 28,570 | — | — |
Frequently asked questions
Are REGN insiders buying or selling?
Over the transactions on record, REGN insiders have been net sellers, with about $17.45M in stock sold across 70 sales, against 6 open-market purchases.
Does insider selling at REGN mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which REGN insiders are selling the most?
Recent selling is concentrated in a few names. LAROSA, JOSEPH J accounts for the largest share on record, with about $7.49M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.