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Timothy J O'Shaughnessy

CIK 1621362 · President and CEO · last filed 2026-08-14

Timothy J O'Shaughnessy is a President and CEO who has filed 24 SEC Form 4 insider transactions across 1 company since 2014. The most recent filing, for GHC, was dated Aug 14, 2026. Across all open-market trades the lifetime net is +$3.1M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $26.5M across reported positions. 28 SEC filings were submitted jointly with Graham Holdings Co.

"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.

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Disclosed Exposure

$26.53M

Companies

1

Total Filings

24

Lifetime Open-Market Net

$3.07M

Filer Profile

Reported Address
C/O GRAHAM HOLDINGS COMPANY
1812 NORTH MOORE STREET, SUITE 2100
ARLINGTON, VA 22209
Related Filers
Graham Holdings Co — 28 joint filings, latest 2026-08-14
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
GHC President and CEO 22,878 $1159.75 $26.53M $3.07M 24 2026-08-14

Recent Filings

24 filings
Insider 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
2026-08-14 GHC Other (J) −4,211 $0 EDGAR
2026-05-28 GHC Other (J) −6,000 $0 EDGAR
2025-11-13 GHC Mixed +743 -$810.7K EDGAR
2025-10-09 GHC Other (J) −2,800 $0 EDGAR
2025-09-30 GHC Mixed +1,012 -$1.21M EDGAR
2025-08-22 GHC Mixed +702 -$755.3K EDGAR
2024-11-05 GHC Mixed +1,896 -$1.61M EDGAR
2024-10-17 GHC Mixed +1,626 -$1.34M EDGAR
2024-09-25 GHC Mixed +1,340 -$1.02M EDGAR
2023-07-07 GHC Exer (M) +2,060 $879.3K EDGAR
Showing 1–10 of 24
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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.