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

Praxis Precision Medicines, Inc.

PRAX · Nasdaq · CIK 0001689548 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

29 Form 4 transaction lines observed in the same window
12 sales · 17 option, withholding, award, gift or other lines

Last qualifying purchase2023-10-05 · DeSimone Jill · $25.4K

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
DeSimone JillDirector
○○▼
Souza MarcioChief Executive Officer
○○
Arbuckle Stuart ADirector
○
Chodakewitz JeffreyDirector
○
YOUNG WILLIAM DDirector
○
Cudkowicz Merit EsterDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 7 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: 2023-10-05 · DeSimone Jill.

Recent Form 4 activity

0Purchases
18Sales
53Other Form 4 lines
34SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING12 sale line(s) · context only
OTHER17 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
4,188,193
Previous report
3,795,697
Avg daily volume
585,284
Days to cover
7.2

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
2023-10-05DeSimone JillPurchase (P)Common Stock14,500USD 1.75USD 25,375SEC filing ↗
2023-06-27Souza MarcioPurchase (P)Common Stock10,000USD 1.06USD 10,600SEC filing ↗
2023-03-24Kelly Timothy EdwinPurchase (P)Common Stock8,000USD 0.87USD 6,960SEC filing ↗
2023-03-24MITCHELL DEAN JPurchase (P)Common Stock50,000USD 0.84USD 42,000SEC filing ↗
2023-03-24Kelly Timothy EdwinPurchase (P)Common Stock8,000USD 0.87USD 6,960SEC filing ↗
2023-03-23Souza MarcioPurchase (P)Common Stock70,002USD 0.86USD 60,202SEC filing ↗
2022-06-16Mastrocola LaurenPurchase (P)Common Stock3,000USD 1.93USD 5,790SEC filing ↗
2022-06-13Nemiroff AlexPurchase (P)Common Stock7,500USD 1.63USD 12,225SEC filing ↗
2022-06-09Kelly Timothy EdwinPurchase (P)Common Stock10,000USD 1.77USD 17,700SEC filing ↗
2022-06-08Souza MarcioPurchase (P)Common Stock27,000USD 1.85USD 49,950SEC filing ↗
2022-06-08MITCHELL DEAN JPurchase (P)Common Stock25,000USD 1.81USD 45,250SEC filing ↗
2021-08-31Kelly Timothy EdwinPurchase (P)Common Stock3,905USD 19.48USD 76,069SEC filing ↗
2021-08-18Souza MarcioPurchase (P)Common Stock9,542USD 15.79USD 150,668SEC filing ↗
2020-11-10Souza MarcioPurchase (P)Common Stock3,846USD 26.08USD 100,304SEC filing ↗
2020-10-20Vitorovic StefanPurchase (P)Common Stock250,000USD 19.00USD 4,750,000SEC filing ↗

Form 4 evidence

71 transaction lines in the latest 365-day window; 199 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-08Souza MarcioGift (G)Common Stock23,121USD 0.00USD 0SEC filing ↗
2026-06-24DeSimone JillSale (S)Common Stock11,600USD 311.32USD 3,611,322SEC filing ↗
2026-06-24DeSimone JillOption exercise / conversion (M)Common Stock11,600USD 71.20USD 825,954SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-08Souza MarcioGift (G)Common Stock23,121USD 0.00USD 0SEC filing ↗
2026-06-24DeSimone JillSale (S)Common Stock11,600USD 311.32USD 3,611,322SEC filing ↗
2026-06-24DeSimone JillOption exercise / conversion (M)Common Stock11,600USD 71.20USD 825,954SEC filing ↗
2026-06-10YOUNG WILLIAM DAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-06-10Norden GregoryAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-06-10MITCHELL DEAN JAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-06-10KINDLER JEFFREY BAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-06-10DeSimone JillAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-06-10Cudkowicz Merit EsterAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-06-10Chodakewitz JeffreyAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-06-10Arbuckle Stuart AAward / grant (A)Common Stock1,371USD 0.00USD 0SEC filing ↗
2026-05-14Souza MarcioAward / grant (A)Common Stock126USD 167.94USD 21,160SEC filing ↗
2026-05-14Sniecinski MeganAward / grant (A)Common Stock89USD 167.94USD 14,947SEC filing ↗
2026-05-14Nemiroff AlexAward / grant (A)Common Stock78USD 167.94USD 13,099SEC filing ↗
2026-05-14Mastrocola LaurenAward / grant (A)Common Stock127USD 167.94USD 21,328SEC filing ↗
2026-05-14Kelly Timothy EdwinAward / grant (A)Common Stock121USD 167.94USD 20,321SEC filing ↗
2026-02-06KINDLER JEFFREY BAward / grant (A)Common Stock1,166USD 0.00USD 0SEC filing ↗
2026-02-06Arbuckle Stuart AAward / grant (A)Common Stock1,166USD 0.00USD 0SEC filing ↗
2026-01-12Sniecinski MeganTax withholding (F)Common Stock885USD 275.74USD 244,030SEC filing ↗
2026-01-12Nemiroff AlexTax withholding (F)Common Stock768USD 275.74USD 211,768SEC filing ↗
2026-01-12Mastrocola LaurenTax withholding (F)Common Stock344USD 275.74USD 94,855SEC filing ↗
2026-01-12Kelly Timothy EdwinTax withholding (F)Common Stock943USD 275.74USD 260,023SEC filing ↗
2026-01-10Souza MarcioTax withholding (F)Common Stock4,252USD 288.45USD 1,226,489SEC filing ↗
2026-01-10Sniecinski MeganTax withholding (F)Common Stock1,087USD 288.45USD 313,545SEC filing ↗
2026-01-10Nemiroff AlexTax withholding (F)Common Stock917USD 288.45USD 264,509SEC filing ↗
2026-01-10Mastrocola LaurenTax withholding (F)Common Stock367USD 288.45USD 105,861SEC filing ↗
2026-01-10Kelly Timothy EdwinTax withholding (F)Common Stock1,335USD 288.45USD 385,081SEC filing ↗
2026-01-08Souza MarcioAward / grant (A)Common Stock27,640USD 0.00USD 0SEC filing ↗
2026-01-08Sniecinski MeganAward / grant (A)Common Stock9,625USD 0.00USD 0SEC filing ↗
2026-01-08Nemiroff AlexAward / grant (A)Common Stock6,875USD 0.00USD 0SEC 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 · —
TickerPRAX
CIK0001689548
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history199 transaction lines from 2020-10-20 to 2026-07-08
16 P purchase lines · 41 S sale lines · 142 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.