Insider buying in December 2025

What corporate insiders bought with their own money in December 2025: every qualifying open-market purchase, and the stocks where two or more insiders bought within the same rolling window. Parsed from SEC Form 4 filings, linked to the source.

Total bought
$10.0B
Notable buys
1,705
Stocks
457
Clusters
132

Cluster buys detected in December 2025

Biggest individual buys of December 2025

InsiderTickerDateValueFiling
GENMAB A/S
10% Owner
MRUSDec 29, 2025$7.4BSEC ↗
GIC Special Investments Pte Ltd
10% Owner
MDLNDec 18, 2025$365.0MSEC ↗
Roivant Sciences Ltd.
Director, 10% Owner
IMVTDec 12, 2025$350.0MSEC ↗
BAKER FELIX
Director, 10% Owner
KYMRDec 11, 2025$158.1MSEC ↗
GENMAB A/S
10% Owner
MRUSDec 29, 2025$102.1MSEC ↗
Lincoln Financial Investments Corp
10% Owner, Investment Adviser
LNBIXDec 11, 2025$75.0MSEC ↗
Mills Andrew J.
Director
MDLNDec 18, 2025$75.0MSEC ↗
Mills Charles N.
Director
MDLNDec 18, 2025$70.8MSEC ↗
FAIRFAX FINANCIAL HOLDINGS LTD/ CAN
10% Owner
UADec 30, 2025$59.1MSEC ↗
Smith Jeffrey C
Director
KVUEDec 12, 2025$55.6MSEC ↗
Smith Jeffrey C
Director
KVUEDec 11, 2025$55.4MSEC ↗
Baker Brothers Life Sciences LP
Director, 10% Owner
KODDec 18, 2025$55.0MSEC ↗
GENMAB A/S
10% Owner
MRUSDec 23, 2025$54.4MSEC ↗
IAC Inc.
10% Owner
MGMDec 5, 2025$39.9MSEC ↗
Lutnick Brandon
10% Owner
MBAVDec 17, 2025$38.1MSEC ↗

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