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

Shattuck Labs, Inc.

STTK · Nasdaq · CIK 0001680367 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

1 qualifying P purchase group
in the current 180-day scoring window

18 Form 4 transaction lines observed in the same window
6 sales · 11 option, withholding, award, gift or other lines

Last qualifying purchase2026-06-09 · SIEGALL CLAY B · $250.0K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying1 qualifying line group(s)
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.

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: SIEGALL CLAY B · $250.0K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-06-09–2026-06-09

Roles in the peak window: Director. Concentration uses priced qualifying P lines only and does not change the saved score.

Insider activity timeline

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

AprMayJunJulAugSepOct
Shukla Abhinav A.Chief Technical Officer
○▼○○▼○▼○▼○
SIEGALL CLAY BDirector
○●
Stout StephenSee Remarks
○○
Pandite Arundathy N.Chief Medical Officer
▼▼
Neill Andrew RChief Financial Officer
○
Schreiber TaylorChief Executive Officer
○
● Purchase▼ Sale○ Other

—

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: 2026-06-09 · SIEGALL CLAY B.

Recent Form 4 activity

1Purchases
6Sales
19Other Form 4 lines
20SEC filings · 365 days
BUYING1 qualifying P line(s) · 180 days
SELLING6 sale line(s) · context only
OTHER11 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
10,947,042
Previous report
6,808,662
Avg daily volume
1,821,507
Days to cover
6.0

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
2026-06-09SIEGALL CLAY BPurchase (P)Common Stock62,500USD 4.00USD 250,000SEC filing ↗
2025-08-25ORBIMED ADVISORS LLC; OrbiMed Capital GP IX LLC; OrbiMed Genesis GP LLCPurchase (P)Common Stock6,306,127USD 0.87USD 5,486,330SEC filing ↗
2025-08-25Ashiya MonaPurchase (P)Common Stock6,306,127USD 0.87USD 5,486,330SEC filing ↗
2024-12-04Green Jeremy; Redmile Group, LLCPurchase (P)Common Stock, par value $0.0001 per share133,371USD 1.25USD 166,714SEC filing ↗
2024-10-07Schreiber TaylorPurchase (P)Common Stock36,500USD 1.21USD 44,165SEC filing ↗
2024-06-28Brous TylerPurchase (P)Common Stock3,000USD 3.90USD 11,700SEC filing ↗
2024-06-27Brous TylerPurchase (P)Common Stock5,416USD 3.89USD 21,068SEC filing ↗
2024-06-26Schreiber TaylorPurchase (P)Common Stock14,400USD 3.47USD 49,968SEC filing ↗
2022-04-26Golumbeski GeorgePurchase (P)Common Stock28,330USD 3.63USD 102,838SEC filing ↗
2022-04-22Golumbeski GeorgePurchase (P)Common Stock234USD 3.67USD 859SEC filing ↗
2022-04-21Golumbeski GeorgePurchase (P)Common Stock26,049USD 3.69USD 96,121SEC filing ↗
2022-01-19Brous TylerPurchase (P)Common Stock3,000USD 6.87USD 20,610SEC filing ↗
2022-01-18Brous TylerPurchase (P)Common Stock2,500USD 7.01USD 17,525SEC filing ↗
2022-01-14Brous TylerPurchase (P)Common Stock2,500USD 7.16USD 17,900SEC filing ↗
2020-10-14Green Jeremy; Redmile Group, LLCPurchase (P)Common Stock3,441,176USD 17.34USD 59,668,794SEC filing ↗

Form 4 evidence

26 transaction lines in the latest 365-day window; 201 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-06Shukla Abhinav A.Option exercise / conversion (M)Common Stock12,153USD 3.57USD 43,386SEC filing ↗
2026-07-02Shukla Abhinav A.Sale (S)Common Stock410USD 7.01USD 2,874SEC filing ↗
2026-07-02Shukla Abhinav A.Option exercise / conversion (M)Common Stock410USD 3.57USD 1,464SEC filing ↗
Show recent Form 4 evidence (26 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-07-06Shukla Abhinav A.Option exercise / conversion (M)Common Stock12,153USD 3.57USD 43,386SEC filing ↗
2026-07-02Shukla Abhinav A.Sale (S)Common Stock410USD 7.01USD 2,874SEC filing ↗
2026-07-02Shukla Abhinav A.Option exercise / conversion (M)Common Stock410USD 3.57USD 1,464SEC filing ↗
2026-07-01Shukla Abhinav A.Sale (S)Common Stock100USD 7.07USD 707SEC filing ↗
2026-07-01Shukla Abhinav A.Option exercise / conversion (M)Common Stock100USD 3.57USD 357SEC filing ↗
2026-06-30Shukla Abhinav A.Sale (S)Common Stock23,365USD 7.08USD 165,424SEC filing ↗
2026-06-30Shukla Abhinav A.Option exercise / conversion (M)Common Stock23,365USD 3.57USD 83,413SEC filing ↗
2026-06-30Pandite Arundathy N.Sale (S)Common Stock30,000USD 7.01USD 210,300SEC filing ↗
2026-06-09SIEGALL CLAY BPurchase (P)Common Stock62,500USD 4.00USD 250,000SEC filing ↗
2026-05-22SIEGALL CLAY BAward / grant (A)Common Stock128,054USD 1.08USD 138,298SEC filing ↗
2026-05-21Shukla Abhinav A.Award / grant (A)Common Stock5,122USD 1.08USD 5,532SEC filing ↗
2026-05-15Stout StephenAward / grant (A)Common Stock12,805USD 1.08USD 13,829SEC filing ↗
2026-05-12Shukla Abhinav A.Sale (S)Common Stock2,032USD 7.01USD 14,244SEC filing ↗
2026-05-12Shukla Abhinav A.Option exercise / conversion (M)Common Stock2,032USD 3.57USD 7,254SEC filing ↗
2026-05-12Pandite Arundathy N.Sale (S)Common Stock30,000USD 6.61USD 198,300SEC filing ↗
2026-05-12Neill Andrew RAward / grant (A)Common Stock64,027USD 1.08USD 69,149SEC filing ↗
2026-05-12Schreiber TaylorAward / grant (A)Common Stock25,610USD 1.08USD 27,659SEC filing ↗
2026-05-10Stout StephenTax withholding (F)Common Stock968USD 6.85USD 6,631SEC filing ↗
2026-01-25Stout StephenTax withholding (F)Common Stock593USD 4.15USD 2,461SEC filing ↗
2026-01-25Pandite Arundathy N.Tax withholding (F)Common Stock3,195USD 4.15USD 13,259SEC filing ↗
2026-01-25Neill Andrew RTax withholding (F)Common Stock2,589USD 4.15USD 10,744SEC filing ↗
2026-01-25DeYoung CasiTax withholding (F)Common Stock2,286USD 4.15USD 9,487SEC filing ↗
2026-01-10Stout StephenTax withholding (F)Common Stock4,153USD 4.75USD 19,727SEC filing ↗
2026-01-10Pandite Arundathy N.Tax withholding (F)Common Stock6,851USD 4.75USD 32,542SEC filing ↗
2026-01-10Neill Andrew RTax withholding (F)Common Stock6,660USD 4.75USD 31,635SEC filing ↗
2026-01-10DeYoung CasiTax withholding (F)Common Stock5,699USD 4.75USD 27,070SEC 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 · —
TickerSTTK
CIK0001680367
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history201 transaction lines from 2020-10-14 to 2026-07-06
22 P purchase lines · 82 S sale lines · 97 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.