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

Artiva Biotherapeutics, Inc.

ARTV · Nasdaq · CIK 0001817241 · Healthcare · Biotechnology

INSIDER SIGNAL

65.1 / 100

2 buyers · 22 purchase transaction lines · $109.2M gross purchase

WHY THIS SIGNAL?

Buyer breadthLow
Purchase sizeStrong
RoleModerate
RecencyLow
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+14.0 / 35
Purchase size+24.7 / 25
Role+14.0 / 20
Recency+2.7 / 10
Conviction+9.8 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 2 insider(s), not 4+
  • ⚠ Role scores low · most senior buyer: TenPercentOwner (CEO, chair and 10% owners score lowest)
  • ⚠ Purchase activity is becoming less recent

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

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

AprMayJunJulAugSepOct
Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Director; Director,TenPercentOwner
●●●●●●●●●●●●●●●●●●●●
Banerjee SubhashisChief Medical Officer
▼○▼○▼▼○▼
Aslan FredChief Executive Officer
▼▼▼○○▼▼
Horan ChristopherChief Tech Operations Officer
▼▼○▼
Bush JenniferCOO, CLO, Compliance Officer
▼▼○▼
Miralles Gines DiegoPresident & Head of R&D
○○
● Purchase▼ Sale○ Other

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

Purchase breadth & concentration

QUALIFYING BUYERS2
PURCHASE CONCENTRATION85%Largest buyer: Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M. · $92.7M
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-05-11–2026-05-11

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

SIGNAL HISTORY

65.1 / 100

Latest recorded score

↓ -0.1 ptsversus the previous recorded snapshot
  1. 65.3
  2. 65.3
  3. 65.2
  4. 65.2
  5. 65.1

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

22Purchases
19Sales
28Other Form 4 lines
51SEC filings · 365 days
BUYING22 qualifying P line(s) · 180 days
SELLING17 sale line(s) · context only
OTHER9 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot detected in parsed evidence

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
-35.7%
3M
-25.6%
6M
+13.1%
12M
+138.9%

Volatility & liquidity

Volatility
155.2%
Beta
—
Avg daily value
USD 2.8M

Valuation

Market cap
—
P/E
—

Fundamentals

Profit margin
—
ROE
-76.3%
Industry
Biotechnology

Market data

Price data up to: 2026-10-07 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: ROE · Fiscal year ended: 2025-12-31 · Status: PASS

Short interest

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

Shares short
2,296,734
Previous report
2,065,150
Avg daily volume
625,944
Days to cover
3.7

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
2026-07-31Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock24,944USD 9.93USD 247,694SEC filing ↗
2026-07-29Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock20,824USD 9.99USD 208,032SEC filing ↗
2026-07-24Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock41,319USD 9.99USD 412,777SEC filing ↗
2026-07-23Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock59,880USD 9.96USD 596,405SEC filing ↗
2026-07-22Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock84,124USD 9.93USD 835,351SEC filing ↗
2026-07-21Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock120,582USD 9.55USD 1,151,558SEC filing ↗
2026-07-17Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock7,882USD 8.95USD 70,544SEC filing ↗
2026-07-16Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock152,472USD 8.93USD 1,361,575SEC filing ↗
2026-07-13Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock6,522USD 8.94USD 58,307SEC filing ↗
2026-07-13Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock6,552USD 8.94USD 58,575SEC filing ↗
2026-07-10Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock15,102USD 8.97USD 135,465SEC filing ↗
2026-06-26Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock1,876USD 8.98USD 16,846SEC filing ↗
2026-06-25Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock31,000USD 8.88USD 275,280SEC filing ↗
2026-06-16Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock124,893USD 8.89USD 1,110,299SEC filing ↗
2026-06-15Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock15,414USD 8.99USD 138,572SEC filing ↗

Form 4 evidence

69 transaction lines in the latest 365-day window; 127 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-06Aslan FredSale (S)Common Stock23,463USD 7.20USD 168,880SEC filing ↗
2026-10-05Horan ChristopherSale (S)Common Stock10,340USD 6.84USD 70,697SEC filing ↗
2026-10-05Bush JenniferSale (S)Common Stock8,370USD 6.84USD 57,227SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-06Aslan FredSale (S)Common Stock23,463USD 7.20USD 168,880SEC filing ↗
2026-10-05Horan ChristopherSale (S)Common Stock10,340USD 6.84USD 70,697SEC filing ↗
2026-10-05Bush JenniferSale (S)Common Stock8,370USD 6.84USD 57,227SEC filing ↗
2026-10-05Banerjee SubhashisSale (S)Common Stock1,099USD 6.84USD 7,514SEC filing ↗
2026-10-05Aslan FredSale (S)Common Stock61,696USD 6.84USD 421,828SEC filing ↗
2026-09-15Aslan FredAward / grant (A)Common Stock110,000USD 0.00USD 0SEC filing ↗
2026-09-10Aslan FredAward / grant (A)Common Stock45,000USD 0.00USD 0SEC filing ↗
2026-09-09Miralles Gines DiegoAward / grant (A)Common Stock45,000USD 0.00USD 0SEC filing ↗
2026-09-09Horan ChristopherAward / grant (A)Common Stock40,000USD 0.00USD 0SEC filing ↗
2026-09-09Bush JenniferAward / grant (A)Common Stock45,000USD 0.00USD 0SEC filing ↗
2026-09-09Banerjee SubhashisAward / grant (A)Common Stock30,000USD 0.00USD 0SEC filing ↗
2026-09-08Aslan FredSale (S)Common Stock23,429USD 10.92USD 255,845SEC filing ↗
2026-09-03Horan ChristopherSale (S)Common Stock10,366USD 11.16USD 115,685SEC filing ↗
2026-09-03Bush JenniferSale (S)Common Stock8,391USD 11.16USD 93,644SEC filing ↗
2026-09-03Banerjee SubhashisSale (S)Common Stock1,100USD 11.16USD 12,276SEC filing ↗
2026-09-03Aslan FredSale (S)Common Stock61,888USD 11.16USD 690,670SEC filing ↗
2026-08-27Banerjee SubhashisSale (S)Common Stock8,222USD 12.01USD 98,746SEC filing ↗
2026-08-27Banerjee SubhashisOption exercise / conversion (M)Common Stock5,306USD 1.92USD 10,188SEC filing ↗
2026-08-18Banerjee SubhashisSale (S)Common Stock429USD 12.00USD 5,148SEC filing ↗
2026-08-18Banerjee SubhashisOption exercise / conversion (M)Common Stock429USD 1.92USD 824SEC filing ↗
2026-07-31Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock24,944USD 9.93USD 247,694SEC filing ↗
2026-07-29Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock20,824USD 9.99USD 208,032SEC filing ↗
2026-07-24Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock41,319USD 9.99USD 412,777SEC filing ↗
2026-07-23Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock59,880USD 9.96USD 596,405SEC filing ↗
2026-07-22Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock84,124USD 9.93USD 835,351SEC filing ↗
2026-07-21Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock120,582USD 9.55USD 1,151,558SEC filing ↗
2026-07-17Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock7,882USD 8.95USD 70,544SEC filing ↗
2026-07-16Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock152,472USD 8.93USD 1,361,575SEC filing ↗
2026-07-13Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock6,522USD 8.94USD 58,307SEC filing ↗
2026-07-13Kolchinsky Peter; RA CAPITAL MANAGEMENT, L.P.; RA Capital Healthcare Fund LP; RA Capital Nexus Fund III, L.P.; RA Capital Nexus Fund, L.P.; Shah Rajeev M.Purchase (P)Common Stock6,552USD 8.94USD 58,575SEC 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 · —
TickerARTV
CIK0001817241
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2836 Biological Products, (No Diagnostic Substances)
ExchangeNasdaq

Data coverage

Local Form 4 history127 transaction lines from 2024-07-22 to 2026-10-06
30 P purchase lines · 21 S sale lines · 76 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.