Week of 2026-08-11

Nine executive-branch trades surfaced this week, highlighted by a six-figure broad-market ETF purchase by the Social Security Commissioner, a cluster of venture-fund moves by the Interior Secretary, and a Transportation Secretary disclosure that arrived nearly a year and a half after the trade.

The Big Picture

This week's batch is modest in size but spans several asset classes: public index funds, municipal bonds, and private venture capital. Frank Bisignano of the Social Security Administration disclosed a sizable purchase of a broad S&P 500 fund. Interior Secretary Douglas Burgum disclosed a set of venture-fund transactions made in April, touching cybersecurity, health technology, and enterprise software. One late filing — from Transportation Secretary Sean Duffy — stands out for its unusual delay.

This Week's Notable Trades

Frank J Bisignano, Commissioner (Social Security Administration)

• Bought a $500,001 – $1,000,000 position in SPDR S&P 500 ETF Trust (SPY) on June 16, 2026 — a passively managed fund tracking the 500 largest U.S. publicly traded companies; disclosed July 7, 2026.
• Bought an additional $50,001 – $100,000 position in SPDR S&P 500 ETF Trust (SPY) on the same date — a second tranche of the same broad-market fund, reported in the same filing.

Douglas J Burgum, Secretary (Department of the Interior)

• Bought a $100,001 – $250,000 position in Arthur Ventures Growth IV, LP (Nucleus Security, Inc.) on April 8, 2026 — a venture fund stake in a private cybersecurity company; the largest single position in this week's batch; disclosed May 12, 2026.
• Bought an additional $1,001 – $15,000 position in Arthur Ventures Growth IV, LP (Nucleus Security, Inc.) on the same date — a separate, smaller tranche in the same fund vehicle.
• Bought $1,001 – $15,000 positions in Arthur Ventures V, LP (Hudu Technologies, Inc. and zizzl Health) on April 8, 2026 — stakes in a software company and a health-tech startup through the same venture fund.
• Sold a $1,001 – $15,000 position in Arthur Ventures IV, LP (Decimal Technologies, Inc.) on April 8, 2026 — an exit from a financial-technology venture stake, reported in the same filing.

Michael J Kratsios, Director (Office of Science and Technology Policy)

• Bought a $1,001 – $15,000 position in Vanguard Tax-Exempt Bond Index Fund ETF (VTEB) on July 1, 2026 — a diversified fund of investment-grade municipal bonds, the income from which is generally exempt from federal income tax; disclosed July 9, 2026.

Sean Duffy, Secretary (Department of Transportation)

• Sold a $1,001 – $15,000 position in Rumble Inc on February 3, 2025 — a video-streaming platform company; the trade was disclosed June 9, 2026, approximately 491 days after it occurred (see Late to File, below).

By the Numbers

• Total trades disclosed: 9
• Buys: 7 | Sells: 2
• Most active official: Douglas J Burgum, 5 trades
• Most active agencies: Department of the Interior (5 trades); Social Security Administration (2 trades)
• Most-bought asset: SPDR S&P 500 ETF Trust (SPY), purchased twice by Bisignano
• Sectors most bought: Broad-market index funds; private venture capital (cybersecurity, health tech, enterprise software)
• Potential conflicts flagged: None
• Late filings this batch: 1 (Sean Duffy, Rumble Inc)

Late to File

Under the STOCK Act, executive-branch officials must disclose a covered transaction within 45 days of the trade date.

This batch: Sean Duffy, Secretary of the Department of Transportation, disclosed a sale of Rumble Inc on June 9, 2026 — 491 days after the trade date of February 3, 2025, well past the 45-day statutory window. It is the only late filing in this week's batch.

All-time: Across the full historical record of executive-branch STOCK Act filings, 88 percent of disclosures have been filed late — 27,444 of 31,182 total filings. The officials with the highest cumulative late-filing counts are Donald J Trump (21,795), Mitchell M Zais (284), Nuria Fernandez (278), Gina M Raimondo (206), and Eric S Lander (203). These totals span multiple administrations and reflect the breadth of the disclosure requirement.

The Fine Print

Data derived from public STOCK Act disclosures. Disclosure date is not the trade date (filings lag 30-45 days). Dollar figures are disclosed ranges, not exact amounts. Conflict-of-interest flags are heuristic "potential overlaps," not assertions of wrongdoing. Not investment advice.