Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

Mirum Pharmaceuticals, Inc.

MIRM · Nasdaq · CIK 0001759425 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

46 Form 4 transaction lines observed in the same window
31 sales · 15 option, withholding, award, gift or other lines

Last qualifying purchase2026-01-23 · Heron Patrick J · $9.0M

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
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.

Purchase breadth, concentration & cluster buying

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

Insider activity timeline

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

AprMayJunJulAugSepOct
Peetz ChristopherCHIEF EXECUTIVE OFFICER
○▼○▼○▼○▼○
Howe JolandaSVP, GLOBAL CONTROLLER
▼▼▼○▼▼
BJERKHOLT ERICCHIEF FINANCIAL OFFICER
▼○▼▼○▼
Ramasastry SairaDirector
○▼○▼
Radovich PeterPRESIDENT AND COO
○
Walbert Timothy PDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 2 additional owner(s) remain in Form 4 evidence.

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: 2026-01-23 · Heron Patrick J.

Recent Form 4 activity

1Purchases
59Sales
47Other Form 4 lines
51SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING31 sale line(s) · context only
OTHER15 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
6,985,385
Previous report
6,281,413
Avg daily volume
910,920
Days to cover
7.7

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
2026-01-23Heron Patrick JPurchase (P)Common Stock131,425USD 68.48USD 8,999,984SEC filing ↗
2025-03-17Heron Patrick JPurchase (P)Common Stock21USD 43.93USD 923SEC filing ↗
2025-03-14Heron Patrick JPurchase (P)Common Stock528USD 44.11USD 23,290SEC filing ↗
2025-03-11Heron Patrick JPurchase (P)Common Stock963USD 43.77USD 42,151SEC filing ↗
2025-03-10Heron Patrick JPurchase (P)Common Stock1,335USD 42.97USD 57,361SEC filing ↗
2025-03-07Heron Patrick JPurchase (P)Common Stock580USD 43.21USD 25,062SEC filing ↗
2025-03-06Heron Patrick JPurchase (P)Common Stock1,335USD 43.89USD 58,593SEC filing ↗
2025-03-05Heron Patrick JPurchase (P)Common Stock267USD 44.55USD 11,895SEC filing ↗
2025-03-04Heron Patrick JPurchase (P)Common Stock1,335USD 45.57USD 60,832SEC filing ↗
2024-09-18Heron Patrick JPurchase (P)Common Stock115USD 37.40USD 4,301SEC filing ↗
2024-09-06Heron Patrick JPurchase (P)Common Stock230USD 41.58USD 9,563SEC filing ↗
2024-03-27BJERKHOLT ERICPurchase (P)Common Stock2,000USD 24.80USD 49,600SEC filing ↗
2024-03-18BJERKHOLT ERICPurchase (P)Common Stock2,000USD 25.80USD 51,600SEC filing ↗
2023-11-09Heron Patrick JPurchase (P)Common Stock2,910USD 28.30USD 82,353SEC filing ↗
2023-09-13Heron Patrick JPurchase (P)Common Stock2,625USD 31.02USD 81,428SEC filing ↗

Form 4 evidence

107 transaction lines in the latest 365-day window; 349 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-06Peetz ChristopherOption exercise / conversion (M)Common Stock12,197USD 17.31USD 211,179SEC filing ↗
2026-09-14BJERKHOLT ERICSale (S)Common Stock9,943USD 98.37USD 978,093SEC filing ↗
2026-09-11BJERKHOLT ERICOption exercise / conversion (M)Common Stock18,333USD —USD —SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-06Peetz ChristopherOption exercise / conversion (M)Common Stock12,197USD 17.31USD 211,179SEC filing ↗
2026-09-14BJERKHOLT ERICSale (S)Common Stock9,943USD 98.37USD 978,093SEC filing ↗
2026-09-11BJERKHOLT ERICOption exercise / conversion (M)Common Stock18,333USD —USD —SEC filing ↗
2026-09-02Howe JolandaSale (S)Common Stock658USD 100.00USD 65,800SEC filing ↗
2026-09-01Peetz ChristopherSale (S)Common Stock30,000USD 98.68USD 2,960,401SEC filing ↗
2026-09-01Peetz ChristopherOption exercise / conversion (M)Common Stock30,000USD 2.94USD 88,200SEC filing ↗
2026-08-18Howe JolandaSale (S)Common Stock40,000USD 100.00USD 4,000,000SEC filing ↗
2026-08-18Howe JolandaOption exercise / conversion (M)Common Stock40,000USD 6.27USD 250,800SEC filing ↗
2026-08-11BJERKHOLT ERICSale (S)Common Stock6,001USD 99.90USD 599,500SEC filing ↗
2026-08-10Peetz ChristopherSale (S)Common Stock20,000USD 98.92USD 1,978,402SEC filing ↗
2026-08-10Peetz ChristopherOption exercise / conversion (M)Common Stock20,000USD 2.94USD 58,800SEC filing ↗
2026-08-03Howe JolandaSale (S)Common Stock1,840USD 105.29USD 193,734SEC filing ↗
2026-07-06Peetz ChristopherSale (S)Common Stock20,000USD 122.27USD 2,445,382SEC filing ↗
2026-07-06Peetz ChristopherOption exercise / conversion (M)Common Stock20,000USD 2.94USD 58,800SEC filing ↗
2026-07-06BJERKHOLT ERICSale (S)Common Stock5,000USD 122.25USD 611,273SEC filing ↗
2026-07-01Howe JolandaSale (S)Common Stock2,721USD 120.00USD 326,520SEC filing ↗
2026-06-17Howe JolandaSale (S)Common Stock2,594USD 101.95USD 264,458SEC filing ↗
2026-06-09BJERKHOLT ERICOption exercise / conversion (M)Common Stock2,393USD 26.49USD 63,391SEC filing ↗
2026-06-08BJERKHOLT ERICSale (S)Common Stock5,000USD 93.82USD 469,077SEC filing ↗
2026-06-05Radovich PeterOption exercise / conversion (M)Common Stock16,988USD 19.19USD 326,000SEC filing ↗
2026-06-01Ramasastry SairaSale (S)Common Stock3,977USD 100.00USD 397,700SEC filing ↗
2026-06-01Peetz ChristopherSale (S)Common Stock30,000USD 95.84USD 2,875,103SEC filing ↗
2026-06-01Peetz ChristopherOption exercise / conversion (M)Common Stock30,000USD 2.94USD 88,200SEC filing ↗
2026-05-29Walbert Timothy POption exercise / conversion (M)Common Stock3,977USD —USD —SEC filing ↗
2026-05-29Ramasastry SairaOption exercise / conversion (M)Common Stock3,977USD —USD —SEC filing ↗
2026-05-29Fischer LaurentOption exercise / conversion (M)Common Stock3,977USD —USD —SEC filing ↗
2026-05-29Cardon LonOption exercise / conversion (M)Common Stock3,977USD —USD —SEC filing ↗
2026-05-15Ramasastry SairaSale (S)Common Stock2,000USD 109.47USD 218,940SEC filing ↗
2026-05-15Ramasastry SairaOption exercise / conversion (M)Common Stock2,000USD 23.51USD 47,020SEC filing ↗
2026-04-15Ramasastry SairaSale (S)Common Stock2,000USD 96.90USD 193,800SEC 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 date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerMIRM
CIK0001759425
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history349 transaction lines from 2020-03-19 to 2026-10-06
31 P purchase lines · 142 S sale lines · 176 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.