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TRXB — structural market context

TRex Bio, Inc.

Structural market context from public regulatory and market data, shown with its as-of dates. Descriptive only: nothing on this page is a recommendation, a prediction, or advice to buy or sell any security.

What changed

As of the close on Nov 4. Each line shows the earlier value, the later value and their dates.

Price

Change from the Nov 3 close to the Nov 4 close: −1.31%.

Volume

Not available: fewer than 20 sessions of history.

Short interest

Short interest 196K shares (settlement Oct 15).

No new file loaded in this window. Latest file: settlement Oct 15, loaded Oct 27.

Fails-to-deliver

Latest file (settlements Oct 1–Oct 14, published Nov 3): 2 days with fails, largest 145K shares on Oct 13.

Previous file (settlements Sep 15–Sep 30, published Oct 16): no fails listed.

Insider filings (Form 4)

None recorded in this window.

TRXB events and their magnitude

Latest SEC filing in the event study

Form 4 · other · filed 2026-10-15 · View on sec.gov ↗

…

How the Event Study works →

TRXB short interest & days to cover

SHARES SHORT
196K
% OF FLOAT
—
DAYS TO COVER
1.1
CHANGE VS PRIOR
+100.0%

FINRA consolidated short interest, reported twice a month and published ~2 weeks after each settlement date. % of float uses reported free float. · as of 2026-10-15 (21d ago)

How short interest and days to cover are measured →

TRXB fails-to-deliver (FTD)

Settlement dateFailed sharesPrice
2026-10-14 · 22d57K$13.6
2026-10-13 · 23d145K$14.03

SEC fails-to-deliver files, published twice a month with ~6 weeks of delay.

How fails-to-deliver are reported →

TRXB insider buying and selling (Form 4)

Last 12 months, Form 4 codes P and S: 1 purchase · 0 sales

InsiderTypeSharesValueFiled
Alexandria Venture Investments, LLC · 10 percent ownerPurchase (P)179K$2.5M2026-10-15

SEC Form 4 filings: purchases and sales reported on Form 4 (transaction codes P and S) only; grants and option exercises excluded. Attributed public records.

Form 4 transaction codes explained →

TRXB offering filings (SEC)

3 SEC filings in the last 90 days, by filing date.

FiledFormDocument
2026-10-09Prospectus filed under Rule 424(b)(4) 424B4View on sec.gov ↗
2026-10-05Amended registration statement (Form S-1/A) S-1/AView on sec.gov ↗
2026-09-18Registration statement (Form S-1) S-1View on sec.gov ↗

See all filings on SEC EDGAR ↗

SEC filings listed by filing date. A registration statement or prospectus does not by itself show that any shares were sold, how many, or at what price. Some of these filings cover debt securities or resales by existing holders. A filing is made by the issuer and appears under each of its tickers. Source: SEC EDGAR daily index; each filing links to its page on sec.gov.

Source: SEC EDGAR daily index, read once a day after the SEC publishes it (around 10:30 pm ET). Forms covered: S-1, S-3, F-1 and F-3 with their amendments, S-3ASR, F-3ASR, 424B4 and 424B5. · as of 2026-11-04

SEC offering filings explained →

Frequently asked questions

Are insiders buying TRXB?
In the last 12 months of SEC Form 4 filings, TRXB recorded 1 insider purchase and 0 sales reported on Form 4 (transaction codes P and S; grants and option exercises excluded). These are attributed public records — information, not instruction.
What are the SEC offering filings listed for TRXB?
They are registration statements (Forms S-1, S-3, F-1 and F-3, with their amendments and the S-3ASR and F-3ASR automatic shelf forms) and prospectuses filed under Rule 424(b)(4) or 424(b)(5). In the last 90 days the issuer of TRXB filed 3; the most recent was a prospectus filed under Rule 424(b)(4) on 2026-10-09. A registration statement or prospectus does not by itself show that any shares were sold, how many, or at what price, and some of these filings cover debt securities or resales by existing holders.
Is this page telling me to buy or sell TRXB?
No. Everything on this page is descriptive, structural market context from public data, shown with its as-of dates. TradeAI News does not issue directional recommendations, price predictions, or buy/sell advice — for any ticker.
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TRXB: the full history

Latest rows shown. Full history, market-wide screens, cluster detection and the context journal live in the dashboard.

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Not financial advice. Trading involves risk. Descriptive structural context, never a recommendation.

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