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

Post Holdings, Inc.

POST · NYSE · CIK 0001530950 · Consumer Defensive · Packaged Foods

INSIDER SIGNAL

No active buy signal

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

10 Form 4 transaction lines observed in the same window
5 sales · 5 option, withholding, award, gift or other lines

Last qualifying purchase2025-11-24 · KEMPER DAVID W · $176.3K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
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
STIRITZ WILLIAM POther
▼▼
Zadoks Jeff ADirector
○○
CURL GREGORY LDirector
▼
● Purchase▼ Sale○ Other

—

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: 2025-11-24 · KEMPER DAVID W.

Recent Form 4 activity

1Purchases
8Sales
98Other Form 4 lines
53SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING5 sale line(s) · context only
OTHER5 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
5,565,956
Previous report
5,888,798
Avg daily volume
1,005,731
Days to cover
5.5

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
2025-11-24KEMPER DAVID WPurchase (P)Common Stock1,800USD 97.93USD 176,274SEC filing ↗
2025-08-19STIRITZ WILLIAM PPurchase (P)Common Stock36,000USD 109.53USD 3,943,080SEC filing ↗
2025-06-05STIRITZ WILLIAM PPurchase (P)Common Stock186,740USD 109.12USD 20,377,069SEC filing ↗
2024-08-13ERB THOMAS CPurchase (P)Common Stock2,000USD 112.94USD 225,880SEC filing ↗
2024-02-07ERB THOMAS CPurchase (P)Common Stock1,000USD 104.24USD 104,240SEC filing ↗
2023-11-20ERB THOMAS CPurchase (P)Common Stock5,000USD 84.48USD 422,400SEC filing ↗
2023-06-07ERB THOMAS CPurchase (P)Common Stock1,000USD 86.76USD 86,760SEC filing ↗
2023-05-18ERB THOMAS CPurchase (P)Common Stock1,000USD 87.00USD 87,000SEC filing ↗
2022-05-10ERB THOMAS CPurchase (P)Common Stock12,400USD 81.26USD 1,007,624SEC filing ↗
2022-03-01ERB THOMAS CPurchase (P)Common Stock1,100USD 79.20USD 87,120SEC filing ↗
2022-02-08ERB THOMAS CPurchase (P)Common Stock1,500USD 105.38USD 158,070SEC filing ↗
2021-11-22ERB THOMAS CPurchase (P)Common Stock2,000USD 103.64USD 207,280SEC filing ↗
2020-08-21WESTPHAL MARK WPurchase (P)Common Stock2,000USD 84.87USD 169,740SEC filing ↗
2020-08-10KEMPER DAVID WPurchase (P)Common Stock8,000USD 88.86USD 710,920SEC filing ↗
2020-05-14HARSHMAN ELLEN FPurchase (P)Common Stock100USD 84.72USD 8,472SEC filing ↗

Form 4 evidence

107 transaction lines in the latest 365-day window; 662 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-02STIRITZ WILLIAM PSale (S)Common Stock277,935USD 84.23USD 23,410,643SEC filing ↗
2026-09-01STIRITZ WILLIAM PSale (S)Common Stock106,197USD 83.60USD 8,878,463SEC filing ↗
2026-08-25Zadoks Jeff AGift (G)Common Stock148,955USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-02STIRITZ WILLIAM PSale (S)Common Stock277,935USD 84.23USD 23,410,643SEC filing ↗
2026-09-01STIRITZ WILLIAM PSale (S)Common Stock106,197USD 83.60USD 8,878,463SEC filing ↗
2026-08-25Zadoks Jeff AGift (G)Common Stock148,955USD 0.00USD 0SEC filing ↗
2026-07-02Zadoks Jeff ATax withholding (F)Common Stock9,962USD 90.94USD 905,944SEC filing ↗
2026-05-13CURL GREGORY LSale (S)Common Stock6,186USD 105.05USD 649,839SEC filing ↗
2026-04-05Pearson Gregory CarlAward / grant (A)Common Stock8,485USD 0.00USD 0SEC filing ↗
2026-03-16Zadoks Jeff AAward / grant (A)Common Stock1,700USD 0.00USD 0SEC filing ↗
2026-03-16Atkinson Michelle MarieAward / grant (A)Common Stock1,700USD 0.00USD 0SEC filing ↗
2026-02-09CURL GREGORY LSale (S)Common Stock6,983USD 114.31USD 798,227SEC filing ↗
2026-02-03SKARIE DAVID PAward / grant (A)Common Stock1,600USD 0.00USD 0SEC filing ↗
2026-02-03KEMPER DAVID WAward / grant (A)Common Stock1,600USD 0.00USD 0SEC filing ↗
2026-02-03JOHNSON JENNIFER KUPERMANAward / grant (A)Common Stock1,600USD 0.00USD 0SEC filing ↗
2026-02-03ERB THOMAS CAward / grant (A)Common Stock1,600USD 0.00USD 0SEC filing ↗
2026-02-03CURL GREGORY LAward / grant (A)Common Stock1,600USD 0.00USD 0SEC filing ↗
2026-02-03BURWELL DOROTHY MAward / grant (A)Common Stock1,600USD 0.00USD 0SEC filing ↗
2026-01-09HARPER BRADLY ATax withholding (F)Common Stock478USD 98.43USD 47,050SEC filing ↗
2026-01-02Zadoks Jeff AOption exercise / conversion (M)Common Stock9,731USD 0.00USD 0SEC filing ↗
2026-01-02Zadoks Jeff ATax withholding (F)Common Stock1,179USD 99.05USD 116,780SEC filing ↗
2025-12-26GRAY DIEDRE JGift (G)Common Stock131,187USD 0.00USD 0SEC filing ↗
2025-12-18STIRITZ WILLIAM POption exercise / conversion (M)Common Stock170,001USD —USD —SEC filing ↗
2025-12-18STIRITZ WILLIAM PD (D)Common Stock170,001USD 101.81USD 17,307,781SEC filing ↗
2025-12-17STIRITZ WILLIAM POption exercise / conversion (M)Common Stock10,703USD —USD —SEC filing ↗
2025-12-17STIRITZ WILLIAM PD (D)Common Stock10,703USD 101.19USD 1,083,060SEC filing ↗
2025-12-05HARPER BRADLY ASale (S)Common Stock1,658USD 96.69USD 160,312SEC filing ↗
2025-12-04MAINER MATTHEW JGift (G)Common Stock600USD 0.00USD 0SEC filing ↗
2025-12-01Zadoks Jeff AGift (G)Common Stock30,000USD 0.00USD 0SEC filing ↗
2025-12-01MAINER MATTHEW JTax withholding (F)Common Stock269USD 104.03USD 27,984SEC filing ↗
2025-12-01HARPER BRADLY ATax withholding (F)Common Stock446USD 104.03USD 46,397SEC filing ↗
2025-12-01GRAY DIEDRE JJ (J)Common Stock40,974USD 0.00USD 0SEC filing ↗
2025-11-25CATOGGIO NICOLASSale (S)Common Stock10,000USD 100.21USD 1,002,100SEC 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 · —
TickerPOST
CIK0001530950
SectorConsumer Defensive
IndustryPackaged Foods Yahoo Finance
SEC SIC2040 Grain Mill Products
ExchangeNYSE

Data coverage

Local Form 4 history662 transaction lines from 2020-01-09 to 2026-09-02
16 P purchase lines · 69 S sale lines · 577 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.