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

Ainos, Inc.

AIMD · Nasdaq · CIK 0001014763 · Technology · Scientific & Technical Instruments

INSIDER SIGNAL

No active buy signal

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

15 Form 4 transaction lines observed in the same window
6 sales · 0 option, withholding, award, gift or other lines

Last qualifying purchase2026-06-05 · chiang yao-chung · $7.2K

WHY NO ACTIVE SIGNAL?

Purchase activityPresent
Recent buying9 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.

Insider activity timeline

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

AprMayJunJulAugSepOct
chiang yao-chungDirector
●●●●●●●●●
lee ting-chuanDirector
▼▼▼
TSAI CHUN-JUNGDirector
▼▼
Taiwan Carbon Nano Technology CorpTenPercentOwner
▼
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: chiang yao-chung · $21.3K
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-04-29–2026-05-05

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

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: 2026-06-05 · chiang yao-chung.

Recent Form 4 activity

9Purchases
9Sales
11Other Form 4 lines
24SEC filings · 365 days
BUYING9 qualifying P line(s) · 180 days
SELLING6 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
-19.4%
3M
-29.5%
6M
-12.8%
12M
-63.5%

Volatility & liquidity

Volatility
128.0%
Beta
2.48
Avg daily value
USD 247,978

Valuation

Market cap
USD 9.5M
P/E
—

Fundamentals

Profit margin
0.0%
ROE
-195.3%
Industry
Scientific & Technical Instruments

Market data

Price data up to: 2026-10-06 · Price source: OpenBB/yfinance · From SEC filings: ROE · Fiscal year ended: 2025-12-31 · From Yahoo Finance: Market cap, Profit margin · Status: PASS

Short interest

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

Shares short
41,264
Previous report
55,787
Avg daily volume
579,884
Days to cover
≤ 1.0

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
2026-06-05chiang yao-chungPurchase (P)Common Stock3,500USD 2.05USD 7,175SEC filing ↗
2026-06-03chiang yao-chungPurchase (P)Common Stock2,000USD 2.13USD 4,260SEC filing ↗
2026-05-28chiang yao-chungPurchase (P)Common Stock250USD 2.30USD 575SEC filing ↗
2026-05-27chiang yao-chungPurchase (P)Common Stock2,000USD 2.00USD 4,000SEC filing ↗
2026-05-19chiang yao-chungPurchase (P)Common Stock2,200USD 1.68USD 3,696SEC filing ↗
2026-05-18chiang yao-chungPurchase (P)Common Stock500USD 1.65USD 825SEC filing ↗
2026-05-05chiang yao-chungPurchase (P)Common Stock129USD 1.70USD 219SEC filing ↗
2026-04-30chiang yao-chungPurchase (P)Common Stock200USD 1.68USD 336SEC filing ↗
2026-04-29chiang yao-chungPurchase (P)Common Stock100USD 1.75USD 175SEC filing ↗
2025-06-23ASE Test, Inc.Purchase (P)Common Stock, par value $0.01 per share29,476USD —USD —SEC filing ↗
2023-04-26lee ting-chuanPurchase (P)COMMON STOCK61,157USD 0.79USD 48,314SEC filing ↗
2021-12-21tsai chun-hsienPurchase (P)Common Stock333,986USD 0.50USD 166,993SEC filing ↗
2021-12-20tsai chung-jungPurchase (P)COMMON STOCK8,932USD 0.50USD 4,466SEC filing ↗
2021-12-20tsai chung-jungPurchase (P)Common Stock133,986USD 0.50USD 66,993SEC filing ↗
2021-12-06chiang yao-chungPurchase (P)Common Stock150,000USD 2.00USD 300,000SEC filing ↗

Form 4 evidence

29 transaction lines in the latest 365-day window; 197 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-05chiang yao-chungPurchase (P)Common Stock3,500USD 2.05USD 7,175SEC filing ↗
2026-06-03chiang yao-chungPurchase (P)Common Stock2,000USD 2.13USD 4,260SEC filing ↗
2026-05-28chiang yao-chungPurchase (P)Common Stock250USD 2.30USD 575SEC filing ↗
Show recent Form 4 evidence (29 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-05chiang yao-chungPurchase (P)Common Stock3,500USD 2.05USD 7,175SEC filing ↗
2026-06-03chiang yao-chungPurchase (P)Common Stock2,000USD 2.13USD 4,260SEC filing ↗
2026-05-28chiang yao-chungPurchase (P)Common Stock250USD 2.30USD 575SEC filing ↗
2026-05-27chiang yao-chungPurchase (P)Common Stock2,000USD 2.00USD 4,000SEC filing ↗
2026-05-26lee ting-chuanSale (S)Common Stock109,988USD 1.90USD 208,977SEC filing ↗
2026-05-26Taiwan Carbon Nano Technology CorpSale (S)Common Stock41,000USD 2.36USD 96,760SEC filing ↗
2026-05-26TSAI CHUN-JUNGSale (S)Common Stock27,718USD 1.87USD 51,833SEC filing ↗
2026-05-22TSAI CHUN-JUNGSale (S)Common Stock1,082USD 1.55USD 1,677SEC filing ↗
2026-05-22lee ting-chuanSale (S)Common Stock9,302USD 1.57USD 14,604SEC filing ↗
2026-05-21lee ting-chuanSale (S)Common Stock9,000USD 1.56USD 14,040SEC filing ↗
2026-05-19chiang yao-chungPurchase (P)Common Stock2,200USD 1.68USD 3,696SEC filing ↗
2026-05-18chiang yao-chungPurchase (P)Common Stock500USD 1.65USD 825SEC filing ↗
2026-05-05chiang yao-chungPurchase (P)Common Stock129USD 1.70USD 219SEC filing ↗
2026-04-30chiang yao-chungPurchase (P)Common Stock200USD 1.68USD 336SEC filing ↗
2026-04-29chiang yao-chungPurchase (P)Common Stock100USD 1.75USD 175SEC filing ↗
2026-04-15tsai chun-hsienAward / grant (A)Common Stock300,000USD 1.61USD 483,000SEC filing ↗
2026-04-15lee ting-chuanAward / grant (A)Common Stock570,000USD 1.61USD 917,700SEC filing ↗
2026-04-15TSAI CHUN-JUNGAward / grant (A)Common Stock330,000USD 1.61USD 531,300SEC filing ↗
2026-01-28Taiwan Carbon Nano Technology CorpSale (S)Common Stock46,000USD 2.17USD 99,820SEC filing ↗
2026-01-09Taiwan Carbon Nano Technology CorpSale (S)Common Stock431USD 1.86USD 802SEC filing ↗
2026-01-08Taiwan Carbon Nano Technology CorpSale (S)Common Stock850USD 1.80USD 1,530SEC filing ↗
2025-11-25tsai chung-yiAward / grant (A)Common Stock50,000USD 2.10USD 105,000SEC filing ↗
2025-11-25tsai chun-hsienAward / grant (A)Common Stock80,000USD 2.10USD 168,000SEC filing ↗
2025-11-25lee ting-chuanAward / grant (A)Common Stock80,000USD 2.10USD 168,000SEC filing ↗
2025-11-25chiang yao-chungAward / grant (A)Common Stock50,000USD 2.10USD 105,000SEC filing ↗
2025-11-25chang wen-hanAward / grant (A)Common Stock50,000USD 2.10USD 105,000SEC filing ↗
2025-11-25WEI PAO-SHENGAward / grant (A)Common Stock50,000USD 2.10USD 105,000SEC filing ↗
2025-11-25TSAI CHUN-JUNGAward / grant (A)Common Stock80,000USD 2.10USD 168,000SEC filing ↗
2025-11-25Lee Hsin-Liang ChristopherAward / grant (A)Common Stock20,000USD 2.10USD 42,000SEC 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 · —
TickerAIMD
CIK0001014763
SectorTechnology
IndustryScientific & Technical Instruments Yahoo Finance
SEC SIC3577 Computer Peripheral Equipment, NEC
ExchangeNasdaq

Data coverage

Local Form 4 history197 transaction lines from 2020-01-02 to 2026-06-05
79 P purchase lines · 25 S sale lines · 93 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.