Katharine Weymouth
CIK 1501808 · last filed 2026-07-17
"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.
Loading insider history…
Disclosed Exposure
$14.31M
Companies
5
Total Filings
109
Lifetime Open-Market Net
-$26.03M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| RSG | Director | 8,138 | $210.55 | $1.71M | -$774.9K | 50 | 2026-07-17 |
| GHC | Director | 7,615 | $1203.54 | $9.16M | -$9.34M | 11 | 2026-05-28 |
| CABO | Director | 5,325 | $39.99 | $212.9K | -$6.11M | 26 | 2026-05-18 |
| XMTR | Director | 37,604 | $85.72 | $3.22M | $137.0K | 12 | 2026-03-12 |
| Graham Holdings Co (WPO) Delisted | Director | 19,721 | — | — | -$9.94M | 8 | 2013-10-11 |
Recent Filings · Page 4 of 11
109 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-03-05 | XMTR | Buy (P) | +500 | $8.4K | EDGAR |
| 2024-02-29 | XMTR | Grant (A) | +7,072 | $0 | EDGAR |
| 2024-02-02 | RSG | Exer (M) | +2,738 | $0 | EDGAR |
| 2024-01-18 | RSG | Grant (A) | — | $0 | EDGAR |
| 2024-01-17 | XMTR | Gift (G) | — | $0 | EDGAR |
| 2024-01-03 | RSG | Grant (A) | — | $0 | EDGAR |
| 2023-10-17 | RSG | Grant (A) | — | $0 | EDGAR |
| 2023-08-15 | XMTR | Buy (P) | +1,200 | $19.7K | EDGAR |
| 2023-07-18 | RSG | Grant (A) | — | $0 | EDGAR |
| 2023-05-19 | CABO | Grant (A) | +233 | $154.9K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.