Analysis: Markwayne Mullin's purchase of COF (Capital One Financial Corp)
Assessment: On watch
Accumulation of COF follows favorable regulatory shifts, but is likely part of a broader year-end rebalancing strategy.
- Member: Markwayne Mullin
- Party / state: R-OK
- Chamber: Senate
- Transaction: Purchase
- Amount: $50,001 - $100,000
- Ticker: COF
- Company: Capital One Financial Corp
- Trade date: 2025-12-29
- Disclosure date: 2026-01-16
- Disclosure lag: 18 days
Executive summary
Senator Markwayne Mullin (R-OK), a member of the Committees on Appropriations and Armed Services, increased his position in Capital One Financial (COF) on 2025-12-29 with a purchase of $50,001 - $100,000. This is his third purchase of COF in 2025, following a pattern of increasing trade sizes as the company navigates a major pending merger with Discover Financial.
Mullin's trading activity in COF shows a clear accumulation pattern, with the trade size increasing from the $15k-$50k range in March to $50k-$100k in November and December. Notably, on 2025-12-29, Mullin executed a broad 'buying spree' across multiple sectors, including large-cap tech (MSFT, NVDA, AAPL, META) and energy (COP, CVX), suggesting a portfolio-wide reallocation rather than a ticker-specific play. While Mullin is not on the Senate Banking Committee, his position on Appropriations provides oversight of financial regulatory budget allocations. The timing of the COF purchase occurs amid ongoing regulatory review of the COF-Discover merger, a major industry catalyst. The trade was disclosed within 18 days, well within the 45-day STOCK Act requirement.
Timeline
- 2025-03-19 — Initial Purchase of COF by Mullin ($15k-$50k)
- 2025-11-10 — Second Purchase of COF by Mullin ($50k-$100k)
- 2025-12-29 — Analyzed Purchase of COF by Mullin ($50k-$100k)
- 2026-01-16 — Disclosure of Dec 29 trade
Independent analysis of public financial disclosures. Not financial or investment advice.
Sources
- Sen. Markwayne Mullin Stock Trades
- Markwayne Mullin Trading Activity | Quiver Quantitative
- Congress Trade: Senator Markwayne Mullin Just Disclosed New Stock Trades
- Senator Markwayne Mullin Latest Stock Trading - GuruFocus.com
- Markwayne Mullin Wins Big in the Stock Market Again
- 2025 Capital One Interim Resolution Plan Public Section
- Form 8-K for Capital ONE Financial Corp filed 09/15/2025
- COF 09.30.2025 LCR
- Regulatory Capital Rule: Modifications to the Enhanced Supplementary Leverage Ratio Standards for U.S. Global Systemically Important Bank Holding Companies and Their Subsidiary Depository Institutions; Total Loss-Absorbing Capacity and Long-Term Debt Requirements for U.S. Global Systemically Important Bank Holding Companies
- Notice of Proposed Rulemaking; Revised Guidelines - OCC Guidelines Establishing Heightened Standards for Certain Large Insured National Banks, Insured Federal Savings Associations, and Insured Federal Branches; Technical Amendments