Stock Trading Canary

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

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US · SEC FORM 4

Adaptive Biotechnologies Corp

ADPT · Nasdaq · CIK 0001478320 · Healthcare · Diagnostics & Research

INSIDER SIGNAL

No active buy signal

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

112 Form 4 transaction lines observed in the same window
62 sales · 50 option, withholding, award, gift or other lines

Last qualifying purchaseNo qualifying purchase is present in the local Form 4 history.

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
RUBINSTEIN JULIEPresident and COO
○▼○▼○▼○▼○▼○▼○▼○▼○▼○▼○▼○▼
LO FRANCISChief People Officer
○▼○▼
ROBINS CHAD MCEO and Chairman
○▼○▼
BOBULSKY SUSANChief Commercial Officer, MRD
▼▼▼
OWEN KATEY EINTERZDirector
▼○
HERSHBERG ROBERTDirector
○▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 1 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.—

Recent Form 4 activity

0Purchases
152Sales
141Other Form 4 lines
88SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING62 sale line(s) · context only
OTHER50 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 provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+21.4%
3M
+43.3%
6M
+111.9%
12M
+109.6%

Volatility & liquidity

Volatility
73.0%
Beta
2.10
Avg daily value
USD 71.7M

Valuation

Market cap
USD 4.8B
P/E
—

Fundamentals

Profit margin
-21.5%
ROE
-27.2%
Industry
Diagnostics & Research

Market data

Price data up to: 2026-10-05 · Price source: OpenBB/yfinance · From SEC filings: Profit margin, ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap · Status: PASS

Short interest

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

Shares short
11,843,887
Previous report
13,489,581
Avg daily volume
2,674,025
Days to cover
4.4

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

No qualifying code P equity purchase is present in the local Form 4 history.

Form 4 evidence

293 transaction lines in the latest 365-day window; 1,587 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-16RUBINSTEIN JULIESale (S)Common Stock11,881USD 24.24USD 288,011SEC filing ↗
2026-10-16RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-15RUBINSTEIN JULIESale (S)Common Stock11,881USD 25.61USD 304,272SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-16RUBINSTEIN JULIESale (S)Common Stock11,881USD 24.24USD 288,011SEC filing ↗
2026-10-16RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-15RUBINSTEIN JULIESale (S)Common Stock11,881USD 25.61USD 304,272SEC filing ↗
2026-10-15RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-14RUBINSTEIN JULIESale (S)Common Stock11,881USD 25.68USD 305,072SEC filing ↗
2026-10-14RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-13RUBINSTEIN JULIESale (S)Common Stock11,881USD 25.50USD 302,966SEC filing ↗
2026-10-13RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-12RUBINSTEIN JULIESale (S)Common Stock11,881USD 25.51USD 303,127SEC filing ↗
2026-10-12RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-09RUBINSTEIN JULIESale (S)Common Stock11,881USD 26.41USD 313,777SEC filing ↗
2026-10-09RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-08RUBINSTEIN JULIESale (S)Common Stock11,881USD 25.66USD 304,866SEC filing ↗
2026-10-08RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-07RUBINSTEIN JULIESale (S)Common Stock11,881USD 26.40USD 313,658SEC filing ↗
2026-10-07RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-06RUBINSTEIN JULIESale (S)Common Stock11,881USD 27.75USD 329,698SEC filing ↗
2026-10-06RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-06BOBULSKY SUSANSale (S)Common Stock6,444USD 30.00USD 193,320SEC filing ↗
2026-10-05RUBINSTEIN JULIESale (S)Common Stock11,881USD 29.19USD 346,815SEC filing ↗
2026-10-05RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-02RUBINSTEIN JULIESale (S)Common Stock11,881USD 28.13USD 334,213SEC filing ↗
2026-10-02RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-01RUBINSTEIN JULIESale (S)Common Stock11,881USD 28.05USD 333,301SEC filing ↗
2026-10-01RUBINSTEIN JULIEOption exercise / conversion (M)Common Stock11,881USD 12.14USD 144,235SEC filing ↗
2026-10-01LO FRANCISSale (S)Common Stock26,792USD 28.28USD 757,697SEC filing ↗
2026-10-01LO FRANCISOption exercise / conversion (M)Common Stock26,792USD 6.78USD 181,557SEC filing ↗
2026-09-16LO FRANCISSale (S)Common Stock115,406USD 28.06USD 3,238,004SEC filing ↗
2026-09-16LO FRANCISOption exercise / conversion (M)Common Stock105,560USD 9.57USD 1,010,581SEC filing ↗
2026-09-15BOBULSKY SUSANSale (S)Common Stock1,195USD 27.00USD 32,265SEC 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 · —
TickerADPT
CIK0001478320
SectorHealthcare
IndustryDiagnostics & Research Yahoo Finance
SEC SIC2836 Biological Products, (No Diagnostic Substances)
ExchangeNasdaq

Data coverage

Local Form 4 history1,587 transaction lines from 2020-01-06 to 2026-10-16
0 P purchase lines · 954 S sale lines · 633 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.