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

Tourmaline Bio, Inc.

TRML · — · CIK 0001827506 · Healthcare

INSIDER SIGNAL

No active buy signal

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

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

Last qualifying purchase2024-08-21 · Kulkarni Sandeep Chidambar · $26.4K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesNone
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

No Form 4 transaction event is present in the current 180-day window.

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: 2024-08-21 · Kulkarni Sandeep Chidambar.

Recent Form 4 activity

0Purchases
0Sales
22Other Form 4 lines
13SEC filings · 365 days
BUYING0 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 has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

The FINRA report lists no short interest for this ticker.

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
2024-08-21Kulkarni Sandeep ChidambarPurchase (P)Common Stock1,779USD 14.85USD 26,418SEC filing ↗
2024-08-16Kulkarni Sandeep ChidambarPurchase (P)Common Stock5,221USD 13.79USD 71,998SEC filing ↗
2024-01-29MCDADE MARKPurchase (P)Common Stock100,000USD 32.50USD 3,250,000SEC filing ↗
2023-11-17Thiara ParvinderPurchase (P)Common Stock1,000USD 17.31USD 17,310SEC filing ↗
2023-11-17Kulkarni Sandeep ChidambarPurchase (P)Common Stock4,000USD 16.99USD 67,960SEC filing ↗
2023-10-27Castelein CaleyPurchase (P)Common Stock15,800USD 14.55USD 229,890SEC filing ↗
2023-10-26Kulkarni Sandeep ChidambarPurchase (P)Common Stock5,000USD 12.25USD 61,250SEC filing ↗
2023-10-25Castelein CaleyPurchase (P)Common Stock4,200USD 12.07USD 50,694SEC filing ↗
2023-10-25Thiara ParvinderPurchase (P)Common Stock2,000USD 12.12USD 24,240SEC filing ↗
2023-10-24Thiara ParvinderPurchase (P)Common Stock5,000USD 10.66USD 53,300SEC filing ↗
2023-10-24Kulkarni Sandeep ChidambarPurchase (P)Common Stock4,650USD 10.68USD 49,662SEC filing ↗
2023-10-24KANTOFF AARONPurchase (P)Common Stock7,500USD 11.86USD 88,950SEC filing ↗
2022-07-29Requadt ScottPurchase (P)Common Stock39,382USD 4.25USD 167,374SEC filing ↗
2022-07-28Requadt ScottPurchase (P)Common Stock3,090USD 4.25USD 13,132SEC filing ↗
2022-07-26Requadt ScottPurchase (P)Common Stock5,528USD 4.24USD 23,439SEC filing ↗

Form 4 evidence

22 transaction lines in the latest 365-day window; 148 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2025-10-28Thiara ParvinderU (U)Common Stock83,782USD —USD —SEC filing ↗
2025-10-28Srivastava SapnaU (U)Common Stock518USD —USD —SEC filing ↗
2025-10-28Robinson Ryan F.U (U)Common Stock14,366USD —USD —SEC filing ↗
Show recent Form 4 evidence (17 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2025-10-28Thiara ParvinderU (U)Common Stock83,782USD —USD —SEC filing ↗
2025-10-28Srivastava SapnaU (U)Common Stock518USD —USD —SEC filing ↗
2025-10-28Robinson Ryan F.U (U)Common Stock14,366USD —USD —SEC filing ↗
2025-10-28MIDDLEKAUFF W BRADFORDU (U)Common Stock60,988USD —USD —SEC filing ↗
2025-10-28MIDDLEKAUFF W BRADFORDD (D)Common Stock8,213USD —USD —SEC filing ↗
2025-10-28MCDADE MARKU (U)Common Stock742,209USD —USD —SEC filing ↗
2025-10-28Kulkarni Sandeep ChidambarU (U)Common Stock731,664USD —USD —SEC filing ↗
2025-10-28Kulkarni Sandeep ChidambarD (D)Common Stock30,387USD —USD —SEC filing ↗
2025-10-28KANTOFF AARONU (U)Common Stock88,281USD —USD —SEC filing ↗
2025-10-28Jones Susan DanaU (U)Common Stock19,782USD —USD —SEC filing ↗
2025-10-28Jones Susan DanaD (D)Common Stock3,152USD —USD —SEC filing ↗
2025-10-28Johnson Kevin BruceU (U)Common Stock40,538USD —USD —SEC filing ↗
2025-10-28Johnson Kevin BruceD (D)Common Stock11,046USD —USD —SEC filing ↗
2025-10-28Castelein CaleyU (U)Common Stock947,936USD —USD —SEC filing ↗
2025-10-24KANTOFF AARONGift (G)Common Stock5,000USD 0.00USD 0SEC filing ↗
2025-10-22Robinson Ryan F.Option exercise / conversion (M)Common Stock14,366USD 13.92USD 199,975SEC filing ↗
2025-10-22Kulkarni Sandeep ChidambarOption exercise / conversion (M)Common Stock25,316USD 7.90USD 199,996SEC 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 · —
TickerTRML
CIK0001827506
SectorHealthcare
Industry— Yahoo Finance
SEC SIC2836 Biological Products, (No Diagnostic Substances)
Exchange—

Data coverage

Local Form 4 history148 transaction lines from 2021-05-11 to 2025-10-28
38 P purchase lines · 28 S sale lines · 82 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.