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

4D Molecular Therapeutics, Inc.

FDMT · Nasdaq · CIK 0001650648 · Healthcare · Biotechnology

INSIDER SIGNAL

No active buy signal

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

26 Form 4 transaction lines observed in the same window
18 sales · 8 option, withholding, award, gift or other lines

Last qualifying purchase2023-05-09 · HALVORSEN OLE ANDREAS; Ott David C.; Shabet Rose Sharon; VIKING GLOBAL INVESTORS LP; Viking Global Opportunities GP LLC; Viking Global Opportunities Illiquid Investments Sub-Master LP; Viking Global Opportunities Parent GP LLC; Viking Global Opportunities Portfolio GP LLC · $13.6M

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.

Insider activity timeline

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

AprMayJunJulAugSepOct
Bizily ScottChief Legal Officer
○▼○▼○▼○▼○▼○▼
Kirn DavidSee Remarks
▼▼▼▼▼▼○▼▼▼
● Purchase▼ Sale○ Other

—

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

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: 2023-05-09 · HALVORSEN OLE ANDREAS; Ott David C.; Shabet Rose Sharon; VIKING GLOBAL INVESTORS LP; Viking Global Opportunities GP LLC; Viking Global Opportunities Illiquid Investments Sub-Master LP; Viking Global Opportunities Parent GP LLC; Viking Global Opportunities Portfolio GP LLC.

Recent Form 4 activity

0Purchases
25Sales
16Other Form 4 lines
19SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING18 sale line(s) · context only
OTHER8 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
11,238,611
Previous report
12,008,645
Avg daily volume
1,204,980
Days to cover
9.3

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
2023-05-09HALVORSEN OLE ANDREAS; Ott David C.; Shabet Rose Sharon; VIKING GLOBAL INVESTORS LP; Viking Global Opportunities GP LLC; Viking Global Opportunities Illiquid Investments Sub-Master LP; Viking Global Opportunities Parent GP LLC; Viking Global Opportunities Portfolio GP LLCPurchase (P)Common Stock850,000USD 16.00USD 13,600,000SEC filing ↗
2020-12-15YAO TONY DUNG LINGPurchase (P)Common Stock425,000USD 23.00USD 9,775,000SEC filing ↗
2020-12-15MILLIGAN JOHN FPurchase (P)Common Stock100,000USD 23.00USD 2,300,000SEC filing ↗
2020-12-15Kamal FariborzPurchase (P)Common Stock4,347USD 23.00USD 99,981SEC filing ↗
2020-12-15HALVORSEN OLE ANDREAS; Ott David C.; Shabet Rose Sharon; VIKING GLOBAL INVESTORS LP; Viking Global Opportunities GP LLC; Viking Global Opportunities Illiquid Investments Sub-Master LP; Viking Global Opportunities Portfolio GP LLCPurchase (P)Common Stock1,100,000USD 23.00USD 25,300,000SEC filing ↗

Form 4 evidence

41 transaction lines in the latest 365-day window; 168 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-05Kirn DavidSale (S)Common Stock58,333USD 12.92USD 753,937SEC filing ↗
2026-09-16Bizily ScottSale (S)Common Stock1,635USD 13.65USD 22,318SEC filing ↗
2026-09-16Bizily ScottOption exercise / conversion (M)Common Stock1,635USD 4.14USD 6,769SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-05Kirn DavidSale (S)Common Stock58,333USD 12.92USD 753,937SEC filing ↗
2026-09-16Bizily ScottSale (S)Common Stock1,635USD 13.65USD 22,318SEC filing ↗
2026-09-16Bizily ScottOption exercise / conversion (M)Common Stock1,635USD 4.14USD 6,769SEC filing ↗
2026-09-14Kirn DavidSale (S)Common Stock58,333USD 13.90USD 810,829SEC filing ↗
2026-09-01Bizily ScottSale (S)Common Stock584USD 14.00USD 8,176SEC filing ↗
2026-09-01Bizily ScottOption exercise / conversion (M)Common Stock584USD 6.49USD 3,790SEC filing ↗
2026-08-19Kirn DavidSale (S)Common Stock69,076USD 15.76USD 1,088,490SEC filing ↗
2026-08-19Kirn DavidOption exercise / conversion (M)Common Stock50,000USD 4.14USD 207,000SEC filing ↗
2026-08-17Bizily ScottSale (S)Common Stock1,635USD 12.20USD 19,947SEC filing ↗
2026-08-17Bizily ScottOption exercise / conversion (M)Common Stock1,635USD 4.14USD 6,769SEC filing ↗
2026-08-13Bizily ScottSale (S)Common Stock1,635USD 12.00USD 19,620SEC filing ↗
2026-08-13Bizily ScottOption exercise / conversion (M)Common Stock1,635USD 4.14USD 6,769SEC filing ↗
2026-08-04Kirn DavidSale (S)Common Stock26,842USD 10.23USD 274,594SEC filing ↗
2026-08-03Kirn DavidSale (S)Common Stock12,415USD 10.05USD 124,771SEC filing ↗
2026-07-10Kirn DavidSale (S)Common Stock15,725USD 12.03USD 189,224SEC filing ↗
2026-07-09Kirn DavidSale (S)Common Stock42,608USD 12.87USD 548,365SEC filing ↗
2026-06-30Bizily ScottSale (S)Common Stock6,566USD 14.00USD 91,924SEC filing ↗
2026-06-30Bizily ScottOption exercise / conversion (M)Common Stock6,566USD 6.20USD 40,700SEC filing ↗
2026-06-23Bizily ScottSale (S)Common Stock9,810USD 12.00USD 117,720SEC filing ↗
2026-06-23Bizily ScottOption exercise / conversion (M)Common Stock9,810USD 4.14USD 40,613SEC filing ↗
2026-06-22Kirn DavidSale (S)Common Stock114,746USD 10.47USD 1,201,391SEC filing ↗
2026-06-01Kirn DavidSale (S)Common Stock1,922USD 10.02USD 19,258SEC filing ↗
2026-03-20Gupta AshooSale (S)Common Stock390USD 8.61USD 3,358SEC filing ↗
2026-03-20Gupta AshooOption exercise / conversion (M)Common Stock1,086USD —USD —SEC filing ↗
2025-12-20Gupta AshooSale (S)Common Stock389USD 8.68USD 3,377SEC filing ↗
2025-12-20Gupta AshooOption exercise / conversion (M)Common Stock1,086USD —USD —SEC filing ↗
2025-12-16Bizily ScottSale (S)Common Stock1,635USD 10.90USD 17,822SEC filing ↗
2025-12-16Bizily ScottOption exercise / conversion (M)Common Stock1,635USD 4.14USD 6,769SEC filing ↗
2025-12-12THEUER CHARLESOption exercise / conversion (M)Common Stock9,333USD 1.14USD 10,640SEC filing ↗
2025-11-17Bizily ScottSale (S)Common Stock1,635USD 10.59USD 17,315SEC 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 · —
TickerFDMT
CIK0001650648
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2836 Biological Products, (No Diagnostic Substances)
ExchangeNasdaq

Data coverage

Local Form 4 history168 transaction lines from 2020-12-15 to 2026-10-05
5 P purchase lines · 93 S sale lines · 70 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.