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REGN Regeneron Pharmaceuticals Inc
Insider figures are trailing 90 days, open-market Form 4 only. Institutional figures are the latest reported quarter. These windows are not simultaneous.
-$3.3M net selling - trailing 90 days
0 buyers - 3 unique sellers
Historical context: most recent complete month (2026-09) is the 10th percentile of this ticker's monthly net P/S flow over 24 complete months. Lower percentiles are more selling; higher are more buying. P10–P90: -$2.0M to $0.
8 accumulating - 6 trimming - 0 unchanged
14 comparable institutions - Q2 2026
open-market Form 4 only - grants, exercises, tax withholding excluded. ~ derived from SEC-reported shares x price.
Who is responsible
| Insider | Role | Net activity | Rows |
|---|---|---|---|
| McCourt Marion | EVP Commercial | -~$2.0M | 2 |
| Guarini Kathryn | — | -~$0.7M | 2 |
| Zoghbi Huda Y | — | -~$0.6M | 1 |
Transactions
| Date | Insider | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| September 3, 2026 | McCourt Marion | EVP Commercial | S | -1131 | 857.39 | ~$1.0M |
| September 2, 2026 | Guarini Kathryn | — | S | -400 | 850 | ~$0.3M |
| September 2, 2026 | McCourt Marion | EVP Commercial | S | -1215 | 850 | ~$1.0M |
| August 10, 2026 | Zoghbi Huda Y | — | S | -800 | 800 | ~$0.6M |
| August 10, 2026 | Guarini Kathryn | — | S | -400 | 800 | ~$0.3M |
| July 2, 2026 | RYAN ARTHUR F | — | S | -200 | 650.15 | ~$0.1M |
| May 1, 2026 | RYAN ARTHUR F | — | 9 reported sale rows | 78 | — | ~$55K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -1 | 712.09 | ~$1K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -2 | 710.87 | ~$1K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -6 | 709.45 | ~$4K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -14 | 705.56 | ~$10K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -5 | 701.76 | ~$4K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -15 | 702.46 | ~$11K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -4 | 707.4 | ~$3K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -24 | 703.46 | ~$17K |
| May 1, 2026 | RYAN ARTHUR F | — | S | -7 | 706.74 | ~$5K |
| April 1, 2026 | RYAN ARTHUR F | — | 8 reported sale rows | 92 | — | ~$72K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -1 | 771.32 | ~$1K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -3 | 772.76 | ~$2K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -8 | 773.59 | ~$6K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -14 | 775.58 | ~$11K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -40 | 779.71 | ~$31K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -4 | 778.24 | ~$3K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -9 | 777.42 | ~$7K |
| April 1, 2026 | RYAN ARTHUR F | — | S | -13 | 776.62 | ~$10K |
| March 2, 2026 | RYAN ARTHUR F | — | 8 reported sale rows | 67 | — | ~$53K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -3 | 780.69 | ~$2K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -5 | 779.69 | ~$4K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -2 | 778.3 | ~$2K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -9 | 784.48 | ~$7K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -7 | 777.46 | ~$5K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -20 | 788.96 | ~$16K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -11 | 785.48 | ~$9K |
| March 2, 2026 | RYAN ARTHUR F | — | S | -10 | 783.62 | ~$8K |
| February 19, 2026 | Zoghbi Huda Y | — | 11 reported sale rows | 1638 | — | ~$1.3M |
| February 19, 2026 | Zoghbi Huda Y | — | S | -4 | 790 | ~$3K |
| February 19, 2026 | Zoghbi Huda Y | — | S | -49 | 774.68 | ~$38K |
| February 19, 2026 | Zoghbi Huda Y | — | S | -50 | 775.5 | ~$39K |
| February 19, 2026 | Zoghbi Huda Y | — | S | -53 | 778.47 | ~$41K |
| February 19, 2026 | Zoghbi Huda Y | — | S | -208 | 779.55 | ~$0.2M |
| February 19, 2026 | Zoghbi Huda Y | — | S | -331 | 780.45 | ~$0.3M |
| February 19, 2026 | Zoghbi Huda Y | — | S | -209 | 781.28 | ~$0.2M |
| February 19, 2026 | Zoghbi Huda Y | — | S | -298 | 782.1 | ~$0.2M |
| February 19, 2026 | Zoghbi Huda Y | — | S | -220 | 783.29 | ~$0.2M |
| February 19, 2026 | Zoghbi Huda Y | — | S | -160 | 784.45 | ~$0.1M |
| February 19, 2026 | Zoghbi Huda Y | — | S | -56 | 785.61 | ~$44K |
| February 9, 2026 | RYAN ARTHUR F | — | 7 reported sale rows | 90 | — | ~$70K |
| February 9, 2026 | RYAN ARTHUR F | — | S | -57 | 777.56 | ~$44K |
| February 9, 2026 | RYAN ARTHUR F | — | S | -10 | 776.59 | ~$8K |
| February 9, 2026 | RYAN ARTHUR F | — | S | -1 | 775.63 | ~$1K |
| February 9, 2026 | RYAN ARTHUR F | — | S | -12 | 778.53 | ~$9K |
| February 9, 2026 | RYAN ARTHUR F | — | S | -5 | 779.41 | ~$4K |
| February 9, 2026 | RYAN ARTHUR F | — | S | -3 | 783.34 | ~$2K |
| February 9, 2026 | RYAN ARTHUR F | — | S | -2 | 786.29 | ~$2K |
| February 9, 2026 | Pitofsky Jason | SVP Controller | 11 reported sale rows | 2036 | — | ~$1.6M |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -1 | 784.66 | ~$1K |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -521 | 776.43 | ~$0.4M |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -391 | 777.51 | ~$0.3M |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -563 | 778.35 | ~$0.4M |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -53 | 785.72 | ~$42K |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -144 | 783.23 | ~$0.1M |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -37 | 782.67 | ~$29K |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -26 | 781.37 | ~$20K |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -75 | 780.06 | ~$59K |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -205 | 779.56 | ~$0.2M |
| February 9, 2026 | Pitofsky Jason | SVP Controller | S | -20 | 775.95 | ~$16K |
| January 7, 2026 | Bassler Bonnie L | — | S | -1500 | 800 | ~$1.2M |
| November 20, 2025 | Bassler Bonnie L | — | S | -760 | 750 | ~$0.6M |
| November 7, 2025 | Pitofsky Jason | VP Controller | S | -431 | 651.43 | ~$0.3M |
| October 29, 2025 | POON CHRISTINE A | — | 6 reported sale rows | 6500 | — | ~$4.3M |
| October 29, 2025 | POON CHRISTINE A | — | S | -712 | 656.5 | ~$0.5M |
| October 29, 2025 | POON CHRISTINE A | — | S | -388 | 657.29 | ~$0.3M |
| October 29, 2025 | POON CHRISTINE A | — | S | -650 | 652.68 | ~$0.4M |
| October 29, 2025 | POON CHRISTINE A | — | S | -1915 | 654.42 | ~$1.3M |
| October 29, 2025 | POON CHRISTINE A | — | S | -100 | 655.1 | ~$66K |
| October 29, 2025 | POON CHRISTINE A | — | S | -2735 | 653.5 | ~$1.8M |
| November 1, 2024 | McCourt Marion | EVP Commercial | S | -1000 | 844.61 | ~$0.8M |
| October 1, 2024 | McCourt Marion | EVP Commercial | S | -1000 | 1054.06 | ~$1.1M |
| October 1, 2024 | RYAN ARTHUR F | — | 9 reported sale rows | 49 | — | ~$51K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -7 | 1045.27 | ~$7K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -12 | 1047.44 | ~$13K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -6 | 1050.6 | ~$6K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -4 | 1052.44 | ~$4K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -2 | 1057.38 | ~$2K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -3 | 1041.35 | ~$3K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -1 | 1042.31 | ~$1K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -5 | 1043.39 | ~$5K |
| October 1, 2024 | RYAN ARTHUR F | — | S | -9 | 1044.62 | ~$9K |