Katharine Weymouth
CIK 1501808 · last filed 2026-05-28
Katharine Weymouth is a corporate insider who has filed 106 SEC Form 4 insider transactions across 5 companies since 2010. The most recent filing, for GHC, was dated May 28, 2026. Across all open-market trades the lifetime net is −$26.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $12.5M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$12.46M
5
106
-$26.03M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| GHC | Director | 7,615 | $1174.18 | $8.94M | -$9.34M | 11 | 2026-05-28 |
| CABO | Director | 5,325 | $47.00 | $250.3K | -$6.11M | 26 | 2026-05-18 |
| RSGw | Director | 8,138 | — | — | -$774.9K | 49 | 2026-04-17 |
| XMTR | Director | 37,604 | $86.99 | $3.27M | $137.0K | 12 | 2026-03-12 |
| Graham Holdings Co (WPO) Delisted | Director | 19,721 | — | — | -$9.94M | 8 | 2013-10-11 |
Recent Filings
106 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-28 | GHC | Other (J) | +6,000 | $0 | EDGAR |
| 2026-05-18 | CABO | Grant (A) | +3,031 | $155.0K | EDGAR |
| 2026-04-17 | RSGw | Grant (A) | — | $0 | EDGAR |
| 2026-03-12 | XMTR | Grant (A) | +5,037 | $0 | EDGAR |
| 2026-03-02 | XMTR | Buy (P) | +1,215 | $50.0K | EDGAR |
| 2026-02-03 | RSGw | Exer (M) | +1,858 | $0 | EDGAR |
| 2026-01-20 | RSGw | Grant (A) | — | $0 | EDGAR |
| 2026-01-06 | RSGw | Grant (A) | — | $0 | EDGAR |
| 2025-12-29 | GHC | Other (J) | — | $0 | EDGAR |
| 2025-12-11 | RSGw | Buy (P) | +478 | $100.1K | EDGAR |