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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.

-$3.4M net selling - trailing 90 days

0 buyers - 4 unique sellers

Historical context: most recent complete month (2026-08) is the 20th percentile of this ticker's monthly net P/S flow over 23 complete months (limited history). Lower percentiles are more selling; higher are more buying.

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.

Insider net $ (monthly)open-market Form 4 only - grants, exercises, tax withholding excluded$5.0M$2.5M$0-$2.5M-$5.0M2024-10 -$1.1M2024-11 -$845K2024-12 $02025-01 $02025-02 $02025-03 $02025-04 $02025-05 $02025-06 $02025-07 $02025-08 $02025-09 $02025-10 -$4.3M2025-11 -$851K2025-12 $02026-01 -$1.2M2026-02 -$2.9M2026-03 -$53K2026-04 -$72K2026-05 -$55K2026-06 $02026-07 -$130K2026-08 -$960K2026-09 -$2.3MInstitutional shares (majority-gated quarters)50.0M25.0M02025-Q4 34.4M sh2026-Q1 25.2M sh2026-Q2 24.1M shOct 24Dec 24Feb 25Apr 25Jun 25Aug 25Oct 25Dec 25Feb 26Apr 26Jun 26Aug 26Q4 2025Q1 2026Q2 2026~ derived from SEC-reported shares x price. Hatched: excluded (implausible price) or unpriced.

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
RYAN ARTHUR F -~$0.1M 1

Transactions

Date Insider Role Type Shares Price Value
9/3/2026 McCourt Marion EVP Commercial S -1131 857.39 ~$1.0M
9/2/2026 Guarini Kathryn S -400 850 ~$0.3M
9/2/2026 McCourt Marion EVP Commercial S -1215 850 ~$1.0M
8/10/2026 Zoghbi Huda Y S -800 800 ~$0.6M
8/10/2026 Guarini Kathryn S -400 800 ~$0.3M
7/2/2026 RYAN ARTHUR F S -200 650.15 ~$0.1M
5/1/2026 RYAN ARTHUR F 9 reported sale rows 78 ~$55K
4/1/2026 RYAN ARTHUR F 8 reported sale rows 92 ~$72K
3/2/2026 RYAN ARTHUR F 8 reported sale rows 67 ~$53K
2/19/2026 Zoghbi Huda Y 11 reported sale rows 1638 ~$1.3M
2/9/2026 RYAN ARTHUR F 7 reported sale rows 90 ~$70K
2/9/2026 Pitofsky Jason SVP Controller 11 reported sale rows 2036 ~$1.6M
1/7/2026 Bassler Bonnie L S -1500 800 ~$1.2M
11/20/2025 Bassler Bonnie L S -760 750 ~$0.6M
11/7/2025 Pitofsky Jason VP Controller S -431 651.43 ~$0.3M
10/29/2025 POON CHRISTINE A 6 reported sale rows 6500 ~$4.3M
11/1/2024 McCourt Marion EVP Commercial S -1000 844.61 ~$0.8M
10/1/2024 RYAN ARTHUR F 9 reported sale rows 49 ~$51K
10/1/2024 McCourt Marion EVP Commercial S -1000 1054.06 ~$1.1M