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

MAIA Biotechnology, Inc.

MAIA · NYSE · CIK 0001878313 · Healthcare · Biotechnology

INSIDER SIGNAL

71.7 / 100

4 buyers · 10 purchase transaction lines · $556.7K gross purchase

WHY THIS SIGNAL?

Buyer breadthStrong
Purchase sizeModerate
RoleModerate
RecencyModerate
ConvictionStrong
Score anatomy

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

Cluster+28.0 / 35
Purchase size+15.0 / 25
Role+13.0 / 20
Recency+5.7 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Role scores low · most senior buyer: Chief Executive Officer (CEO, chair and 10% owners score lowest)
  • ✓ Cluster breadth is broad · 4+ insiders

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
Guerrero RamiroDirector
●●●●●●
Vitoc VladChief Executive Officer
●●
Smith StanDirector
●
Gryaznov SergeiChief Scientific Officer
●
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS4
PURCHASE CONCENTRATION45%Largest buyer: Guerrero Ramiro · $252.4K
CLUSTER BUYING · 15D3 insidersPeak activity: 2026-06-01–2026-06-01

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

SIGNAL HISTORY

71.7 / 100

Latest recorded score

↓ -0.2 ptsversus the previous recorded snapshot
  1. 72.4
  2. 72.2
  3. 72.1
  4. 71.9
  5. 71.7

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

Recent Form 4 activity

29Purchases
0Sales
0Other Form 4 lines
21SEC filings · 365 days
BUYING10 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER0 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
-6.9%
3M
-14.1%
6M
-4.7%
12M
-32.6%

Volatility & liquidity

Volatility
82.7%
Beta
—
Avg daily value
USD 629,797

Valuation

Market cap
USD 74.2M
P/E
—

Fundamentals

Profit margin
—
ROE
-942.7%
Industry
Biotechnology

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-08-10 · Status: PASS

Short interest

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

Shares short
2,690,687
Previous report
2,098,876
Avg daily volume
784,612
Days to cover
3.4

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

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-14Vitoc VladPurchase (P)Common Stock73,000USD 1.37USD 100,010SEC filing ↗
2026-09-10Guerrero RamiroPurchase (P)Common Stock37,595USD 1.32USD 49,625SEC filing ↗
2026-08-28Guerrero RamiroPurchase (P)Common Stock46,620USD 1.35USD 62,937SEC filing ↗
2026-08-27Guerrero RamiroPurchase (P)Common Stock78,239USD 1.39USD 108,752SEC filing ↗
2026-08-26Guerrero RamiroPurchase (P)Common Stock8,931USD 1.39USD 12,414SEC filing ↗
2026-08-24Guerrero RamiroPurchase (P)Common Stock1,794USD 1.33USD 2,386SEC filing ↗
2026-08-20Guerrero RamiroPurchase (P)Common Stock11,899USD 1.37USD 16,302SEC filing ↗
2026-06-01Vitoc VladPurchase (P)Common Stock72,700USD 1.39USD 101,053SEC filing ↗
2026-06-01Smith StanPurchase (P)Common Stock75,000USD 1.34USD 100,500SEC filing ↗
2026-06-01Gryaznov SergeiPurchase (P)Common Stock2,000USD 1.35USD 2,700SEC filing ↗
2025-12-22Smith StanPurchase (P)Common Stock57,189USD 1.22USD 69,771SEC filing ↗
2025-12-22Louie Ngar YeePurchase (P)Common Stock81,699USD 1.22USD 99,673SEC filing ↗
2025-12-22CHAOUKI STEVEN MPurchase (P)Common Stock40,849USD 1.22USD 49,836SEC filing ↗
2025-12-05Smith StanPurchase (P)Common Stock9,160USD 1.20USD 10,946SEC filing ↗
2025-11-28Vitoc VladPurchase (P)Common Stock50,000USD 1.14USD 57,000SEC filing ↗

Form 4 evidence

29 transaction lines in the latest 365-day window; 152 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-14Vitoc VladPurchase (P)Common Stock73,000USD 1.37USD 100,010SEC filing ↗
2026-09-10Guerrero RamiroPurchase (P)Common Stock37,595USD 1.32USD 49,625SEC filing ↗
2026-08-28Guerrero RamiroPurchase (P)Common Stock46,620USD 1.35USD 62,937SEC filing ↗
Show recent Form 4 evidence (28 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-14Vitoc VladPurchase (P)Common Stock73,000USD 1.37USD 100,010SEC filing ↗
2026-09-10Guerrero RamiroPurchase (P)Common Stock37,595USD 1.32USD 49,625SEC filing ↗
2026-08-28Guerrero RamiroPurchase (P)Common Stock46,620USD 1.35USD 62,937SEC filing ↗
2026-08-27Guerrero RamiroPurchase (P)Common Stock78,239USD 1.39USD 108,752SEC filing ↗
2026-08-26Guerrero RamiroPurchase (P)Common Stock8,931USD 1.39USD 12,414SEC filing ↗
2026-08-24Guerrero RamiroPurchase (P)Common Stock1,794USD 1.33USD 2,386SEC filing ↗
2026-08-20Guerrero RamiroPurchase (P)Common Stock11,899USD 1.37USD 16,302SEC filing ↗
2026-06-01Vitoc VladPurchase (P)Common Stock72,700USD 1.39USD 101,053SEC filing ↗
2026-06-01Smith StanPurchase (P)Common Stock75,000USD 1.34USD 100,500SEC filing ↗
2026-06-01Gryaznov SergeiPurchase (P)Common Stock2,000USD 1.35USD 2,700SEC filing ↗
2025-12-22Smith StanPurchase (P)Common Stock57,189USD 1.22USD 69,771SEC filing ↗
2025-12-22Louie Ngar YeePurchase (P)Common Stock81,699USD 1.22USD 99,673SEC filing ↗
2025-12-22CHAOUKI STEVEN MPurchase (P)Common Stock40,849USD 1.22USD 49,836SEC filing ↗
2025-12-05Smith StanPurchase (P)Common Stock9,160USD 1.20USD 10,946SEC filing ↗
2025-11-28Vitoc VladPurchase (P)Common Stock50,000USD 1.14USD 57,000SEC filing ↗
2025-11-28Vitoc VladPurchase (P)Common Stock50,000USD 1.14USD 57,000SEC filing ↗
2025-11-28Luput CristianPurchase (P)Common Stock18,145USD 1.11USD 20,141SEC filing ↗
2025-11-26Vitoc VladPurchase (P)Common Stock22,000USD 1.05USD 23,100SEC filing ↗
2025-11-26Vitoc VladPurchase (P)Common Stock22,000USD 1.05USD 23,100SEC filing ↗
2025-11-26Smith StanPurchase (P)Common Stock15,000USD 1.04USD 15,600SEC filing ↗
2025-11-26Luput CristianPurchase (P)Common Stock20,000USD 1.08USD 21,600SEC filing ↗
2025-11-25Vitoc VladPurchase (P)Common Stock10,500USD 0.97USD 10,185SEC filing ↗
2025-11-25Vitoc VladPurchase (P)Common Stock10,500USD 0.97USD 10,185SEC filing ↗
2025-11-25Luput CristianPurchase (P)Common Stock10,000USD 0.98USD 9,800SEC filing ↗
2025-11-25Smith StanPurchase (P)Common Stock15,000USD 0.98USD 14,700SEC filing ↗
2025-11-24Smith StanPurchase (P)Common Stock10,000USD 0.99USD 9,900SEC filing ↗
2025-11-24Vitoc VladPurchase (P)Common Stock10,000USD 0.99USD 9,900SEC filing ↗
2025-11-21Vitoc VladPurchase (P)Common Stock1,800USD 0.92USD 1,656SEC 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 · —
TickerMAIA
CIK0001878313
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNYSE

Data coverage

Local Form 4 history152 transaction lines from 2022-07-28 to 2026-09-14
147 P purchase lines · 0 S sale lines · 5 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.