Sean McMaster

Administrator, Federal Highway Administration · Department of Transportation

McMaster reported 7 sales (est. $582K) and 13 purchases (est. $342K). Holdings included GRAB, OSS, HOOD, TSLA, AMKR, among others. 15 of 20 transactions were filed late.

20trades

7sales

13purchases

15late filings

Aug 7, 2025 – Jan 21, 2026

Last filing: Apr 1, 2026|Transactions: Aug 7, 2025 – Jan 21, 2026

This total aggregates every source filing listed below. Public trackers focused on a single disclosure may report smaller counts for the same official.

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Transaction timeline

One dot per disclosed trade, sized by amount. Red = sale, green = purchase.

Sale

Purchase

Late filing

Circle size = transaction amount

Filter

20 trades

Date	Description	Ticker	Type	Amount	Source
Jan 21, 2026	Grab Holdings Limited Class A Ordinary SharesLate	GRAB	Purchase	$1K-$15K	PDF
Jan 13, 2026	One Stop Systems Inc. Common Stock	OSS	Purchase	$15K-$50K	PDF
Jan 9, 2026	Robinhood Markets Inc. Class A Common Stock	HOOD

Source documents on file with OGE

Reviewed financial disclosure documents the Office of Government Ethics has published or recorded for Sean McMaster. Open Cabinet summarizes listed documents observationally and links to the source PDF where one is publicly available. We do not issue compliance verdicts — that is OGE’s role, not ours.

Document timeline

Nominee 278

Source filings

Original PDFs from the U.S. Office of Government Ethics. These are the documents Open Cabinet parses.

278-T2026-04-01PDF 278-T2026-03-13PDF 278-T2026-01-27PDF 278-T2026-01-27PDF 278-T2026-01-06PDF

Source: U.S. Office of Government Ethics, 278-T Periodic Transaction Report. Asset values and transaction amounts are reported in ranges as required by federal law. View original filings

278-T Periodic Transaction Report278 Transaction· filed Apr 1, 2026
278-T signed 02/27/2026 and OGE-certified 03/25/2026. Discloses one transaction: a purchase of Grab Holdings Limited Class A Ordinary Shares (GRAB) on 01/21/2026 in the $1,001-$15,000 range, marked Yes on the 30-day notification flag.
OGE record
278-T Periodic Transaction Report278 Transaction· filed Mar 13, 2026
278-T signed 01/20/2026 and OGE-certified 03/11/2026. Discloses four purchases between 12/18/2025 and 01/13/2026: One Stop Systems (OSS), Robinhood Markets (HOOD), and two Grab Holdings (GRAB) lots, ranging from $1,001-$15,000 to $15,001-$50,000. The earliest GRAB purchase is marked Yes on the 30-day notification flag; the three January 2026 purchases are marked No.
OGE record
278-T Periodic Transaction Report278 Transaction· filed Jan 27, 2026
278-T signed 12/01/2025 and OGE-certified 01/22/2026. Discloses seven transactions between 10/07/2025 and 11/03/2025: a Tesla rival mix including ETHZilla (ETHZ) purchase, MicroStrategy (MSTR) sale, Amcor (AMCR) purchase and sale, two Amkor Technology (AMKR) purchases, and a Grab Holdings (GRAB) purchase. Six of seven rows are marked Yes on the 30-day notification flag; the GRAB purchase is marked No.
OGE record
278-T Periodic Transaction Report278 Transaction· filed Jan 27, 2026
278-T signed 12/11/2025 and OGE-certified 01/22/2026. Discloses one transaction: a sale of Tesla, Inc. (TSLA) on 12/10/2025 in the $250,001-$500,000 range, marked No on the 30-day notification flag. Tesla is the divestiture asset specifically named in McMaster's ethics agreement.
OGE record
278-T Periodic Transaction Report278 Transaction· filed Jan 6, 2026
278-T signed 09/29/2025 and OGE-certified 01/05/2026, marked Data Revised. Discloses seven August 2025 transactions including sales of Semler Scientific (SMLR), Global X MSCI Argentina ETF (ARGT), Microsoft (MSFT), Coinbase (COIN), Amcor partial trades, and purchases of bitmine immersion technology (BMNR) and 180 Life Sciences/ETHZilla (ATNF, now ETHZ). All seven rows are marked Yes on the 30-day notification flag.
OGE record
Compliance CertificationCertification of Ethics Agreement Compliance (misindexed: PDF is for Craig Trainor / HUD)· filed Dec 16, 2025
Misindexed file in OGE's API: appears under McMaster's results but the PDF itself is the Ethics Agreement Compliance Certification for Craig Trainor, Assistant Secretary for the Office of FHEO at HUD (ethics agreement signed 03/12/2025, confirmed 10/07/2025). Not a McMaster filing. Flagged here for transparency.
OGE record
Compliance CertificationCertification of Ethics Agreement Compliance· filed Dec 16, 2025
Ethics Agreement Compliance Certification digitally signed by Sean Kenneth Bruce McMaster on 12/12/2025. Lists ethics agreement signed 4/4/2025, confirmed 9/18/2025, with certification due 12/24/2025. Marks Yes on resignations, divestitures, 278-T filing (cited as 12/11/2025), managed accounts, interim recusals, both recusal categories, initial ethics briefing, and No on all three waiver/authorization questions.
OGE record
Ethics AgreementEthics Agreement· filed Apr 10, 2025
Ethics agreement letter to DOT DAEO Judith S. Kaleta dated April 4, 2025. McMaster commits to resign from The Boeing Company upon confirmation, addresses pro-rated 2025 bonus and unvested restricted stock units that will continue to vest, and lists two-year impartiality recusal regarding Boeing. Section 5 commits to divest Tesla (TSLA) within 90 days of confirmation. Also covers retention as co-trustee of a family trust and spouse's employment with ECS Federal.
OGE record
Nominee 278Nominee 278 (AMENDED)· filed Apr 10, 2025
Amended Nominee 278e signed 03/14/2025 and OGE-certified 04/08/2025. Cover sheet from DAEO Kaleta to OGE Acting Director Greer (04/17/2025) transmits a supplemental disclosure adding McMaster's Boeing Health Savings Account holdings (Vanguard funds VIGIX, VMVAX, VSIAX, VVIAX) and previously-omitted Amazon (AMZN) and Apple (AAPL) capital gains/dividend income. Indicates the amendment was to correct inadvertent omissions from the March 14 nominee report.
OGE record