Sean McMaster

Administrator, Federal Highway Administration · Department of Transportation

McMaster reported 7 sales (estimated at $582K) and 18 purchases (estimated at $548K) across 25 transactions between August 7, 2025 and May 14, 2026. His five most recent purchases, dated May 13 and May 14, 2026, were Akamai (AKAM), Corning (GLW), Fluence Energy (FLNC), Qualcomm (QCOM) and Forgent Power (FPS). 15 of the 25 transactions, or 60 percent, were flagged as filed late.

25trades

7sales

18purchases

15late filings

Aug. 7, 2025 – May 14, 2026

Last filing: July 15, 2026|Transactions: Aug. 7, 2025 – May 14, 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 mark per disclosed trade, sized by reported amount range. Circle = sale, square = purchase.

Sale

Purchase

Late filing

Mark size = reported amount range (minimum)

Filter

25 trades

Date	Description	Ticker	Type	Amount	Disclosed	Source
May 14, 2026	Forgent Power Solution (FPS)	FPS	Purchase	$15K-$50K	July 15, 202662d	PDF
May 13, 2026	Akamai Technologies, Inc. (AKAM)	AKAM	Purchase	$15K-$50K	July 15, 202663d	PDF

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

Source filings

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

Sean-McMaster-06.11.2026-278T2026-07-15PDF 278-T2026-04-01PDF 278-T2026-03-13PDF 278-T2026-01-27PDF 278-T2026-01-27PDF

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 ReportSean-McMaster-06.11.2026-278T· filed July 15, 2026
Periodic transaction report (Form 278-T) disclosing individual securities transactions over $1,000 during the reporting window. See PDF for the itemized transaction list.
OGE record
278-T Periodic Transaction Report278 Transaction· filed April 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 March 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 April 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 April 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