Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Graham Holdings Co

GHC · NYSE · CIK 0000104889 · Consumer Defensive · Conglomerates

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

19 Form 4 transaction lines observed in the same window
0 sales · 19 option, withholding, award, gift or other lines

Last qualifying purchase2024-09-12 · GAYNER THOMAS SINNICKSON · $74.3K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesNone
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
O'Shaughnessy LauraTenPercentOwner
○○
O'Shaughnessy Timothy JPresident and CEO
○○
Maas, JacobExecutive VP
○○
WAGONER G RICHARD JRDirector
○○
MULCAHY ANNE MDirector
○○
Markell Jack A.Director
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 3 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2024-09-12 · GAYNER THOMAS SINNICKSON.

Recent Form 4 activity

0Purchases
0Sales
37Other Form 4 lines
30SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER19 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
234,563
Previous report
223,186
Avg daily volume
36,608
Days to cover
6.4

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2024-09-12GAYNER THOMAS SINNICKSONPurchase (P)Class B Common Stock100USD 743.30USD 74,330SEC filing ↗
2024-05-28MULCAHY ANNE MPurchase (P)Class B Common Stock135USD 745.07USD 100,584SEC filing ↗
2023-11-09GAYNER THOMAS SINNICKSONPurchase (P)Class B Common Stock100USD 607.24USD 60,724SEC filing ↗
2023-09-08GAYNER THOMAS SINNICKSONPurchase (P)Class B Common Stock100USD 569.83USD 56,983SEC filing ↗
2023-05-09GAYNER THOMAS SINNICKSONPurchase (P)Class B Common Stock100USD 581.63USD 58,163SEC filing ↗
2022-09-16GAYNER THOMAS SINNICKSONPurchase (P)Class B Common Stock100USD 556.15USD 55,615SEC filing ↗
2021-12-30Stonesifer Sandra M.Purchase (P)Class B Common Stock20USD 591.99USD 11,840SEC filing ↗
2021-12-01Markell Jack A.Purchase (P)Class B Common Stock60USD 570.00USD 34,200SEC filing ↗
2021-11-11GAYNER THOMAS SINNICKSONPurchase (P)Class B Common Stock100USD 595.17USD 59,517SEC filing ↗
2020-08-27Bollinger Lee CPurchase (P)Class B Common Stock350USD 426.00USD 149,100SEC filing ↗
2020-07-02Bollinger Lee CPurchase (P)Class B Common Stock300USD 340.00USD 102,000SEC filing ↗
2020-03-23Rosen Andrew StephenPurchase (P)Class B Common Stock1,733USD 288.49USD 499,956SEC filing ↗
2020-03-18Markell Jack A.Purchase (P)Class B Common Stock55USD 315.00USD 17,325SEC filing ↗
2020-02-28MULCAHY ANNE MPurchase (P)Class B Common Stock104USD 485.99USD 50,543SEC filing ↗
2020-02-27Bollinger Lee CPurchase (P)Class B Common Stock500USD 492.41USD 246,205SEC filing ↗

Form 4 evidence

37 transaction lines in the latest 365-day window; 239 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01WAGONER G RICHARD JRAward / grant (A)Class B Common Stock21USD 1,139.10USD 23,921SEC filing ↗
2026-10-01Markell Jack A.Award / grant (A)Class B Common Stock7USD 1,139.10USD 7,974SEC filing ↗
2026-10-01MULCAHY ANNE MAward / grant (A)Class B Common Stock21USD 1,139.10USD 23,921SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01WAGONER G RICHARD JRAward / grant (A)Class B Common Stock21USD 1,139.10USD 23,921SEC filing ↗
2026-10-01Markell Jack A.Award / grant (A)Class B Common Stock7USD 1,139.10USD 7,974SEC filing ↗
2026-10-01MULCAHY ANNE MAward / grant (A)Class B Common Stock21USD 1,139.10USD 23,921SEC filing ↗
2026-10-01Davis Christopher CAward / grant (A)Class B Common Stock24USD 1,139.10USD 27,338SEC filing ↗
2026-10-01CONLEY DANIELLE Y.Award / grant (A)Class B Common Stock19USD 1,139.10USD 21,643SEC filing ↗
2026-08-28Maas, JacobTax withholding (F)Class B Common Stock501USD 1,159.23USD 580,774SEC filing ↗
2026-08-28Maas, JacobAward / grant (A)Class B Common Stock1,000USD 0.00USD 0SEC filing ↗
2026-08-13O'Shaughnessy Timothy JJ (J)Class B Common Stock4,211USD —USD —SEC filing ↗
2026-08-13O'Shaughnessy LauraJ (J)Class B Common Stock4,211USD —USD —SEC filing ↗
2026-07-01WAGONER G RICHARD JRAward / grant (A)Class B Common Stock21USD 1,161.11USD 24,383SEC filing ↗
2026-07-01Markell Jack A.Award / grant (A)Class B Common Stock7USD 1,161.11USD 8,128SEC filing ↗
2026-07-01MULCAHY ANNE MAward / grant (A)Class B Common Stock21USD 1,161.11USD 24,383SEC filing ↗
2026-07-01Davis Christopher CAward / grant (A)Class B Common Stock23USD 1,161.11USD 26,706SEC filing ↗
2026-07-01CONLEY DANIELLE Y.Award / grant (A)Class B Common Stock19USD 1,161.11USD 22,061SEC filing ↗
2026-05-26Weymouth KatharineJ (J)Class B Common Stock6,000USD —USD —SEC filing ↗
2026-05-26O'Shaughnessy Timothy JJ (J)Class B Common Stock6,000USD —USD —SEC filing ↗
2026-05-26O'Shaughnessy LauraJ (J)Class B Common Stock6,000USD —USD —SEC filing ↗
2026-04-01WAGONER G RICHARD JRAward / grant (A)Class B Common Stock23USD 1,061.70USD 24,419SEC filing ↗
2026-04-01Markell Jack A.Award / grant (A)Class B Common Stock8USD 1,061.70USD 8,494SEC filing ↗
2026-04-01MULCAHY ANNE MAward / grant (A)Class B Common Stock23USD 1,061.70USD 24,419SEC filing ↗
2026-04-01Davis Christopher CAward / grant (A)Class B Common Stock25USD 1,061.70USD 26,542SEC filing ↗
2026-04-01CONLEY DANIELLE Y.Award / grant (A)Class B Common Stock21USD 1,061.70USD 22,296SEC filing ↗
2026-01-16Maas, JacobTax withholding (F)Class B Common Stock377USD 1,150.50USD 433,738SEC filing ↗
2026-01-16Maas, JacobAward / grant (A)Class B Common Stock1,000USD 0.00USD 0SEC filing ↗
2026-01-02WAGONER G RICHARD JRAward / grant (A)Class B Common Stock22USD 1,091.18USD 24,006SEC filing ↗
2026-01-02Markell Jack A.Award / grant (A)Class B Common Stock8USD 1,091.18USD 8,729SEC filing ↗
2026-01-02MULCAHY ANNE MAward / grant (A)Class B Common Stock22USD 1,091.18USD 24,006SEC filing ↗
2026-01-02Davis Christopher CAward / grant (A)Class B Common Stock25USD 1,091.18USD 27,280SEC filing ↗
2026-01-02CONLEY DANIELLE Y.Award / grant (A)Class B Common Stock20USD 1,091.18USD 21,824SEC filing ↗
2025-11-11O'Shaughnessy Timothy JOption exercise / conversion (M)Class B Common Stock7,582USD 872.01USD 6,611,580SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerGHC
CIK0000104889
SectorConsumer Defensive
IndustryConglomerates Yahoo Finance
SEC SIC8200 Services-Educational Services
ExchangeNYSE

Data coverage

Local Form 4 history239 transaction lines from 2020-02-27 to 2026-10-01
19 P purchase lines · 48 S sale lines · 172 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.