SVLSF VI, LLC - 08 Oct 2026 Form 4 Insider Report for TRex Bio, Inc.

Reporting relationship
10%+ Owner
Issuer ticker
N/A
Reported as of
08 Oct 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 3 source fields
SEC form
4
Accepted by SEC
13 Oct 2026, 16:30:01 UTC
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
SVLSF VI, LLC By: Brent M. Faduski, Officer /s/ Brent M. Faduski

Key filing fact

SVLSF VI, LLC filed Form 4 for TRex Bio, Inc. on 13 Oct 2026.

Key facts

  • This page summarizes SVLSF VI, LLC's Form 4 filing for TRex Bio, Inc..
  • 12 reported transactions and 15 derivative rows are listed below.
  • Accepted by SEC: 13 Oct 2026, 16:30.

Change

  • No earlier filing in this sequence is available for direct comparison.
  • Current net transaction value: $0.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (3)

CIK 0001717728 Primary reporting owner

SVLSF VI, LLC

Relationship
10%+ Owner
Address
28 STATE STREET, SUITE 980, BOSTON
Signature
SVLSF VI, LLC By: Brent M. Faduski, Officer /s/ Brent M. Faduski
Signature date
13 Oct 2026
CIK 0001717730

SV Life Sciences Fund VI (GP), L.P.

Relationship
10%+ Owner
Address
28 STATE STREET, SUITE 980, BOSTON
Signature
SV Life Sciences Fund VI (GP), L.P. By: SVLSF VI, LLC, its General Partner By: Brent M. Faduski, Officer /s/ Brent M. Faduski
Signature date
13 Oct 2026
CIK 0001642251

SV Life Sciences Fund VI, L.P.

Relationship
10%+ Owner
Address
28 STATE STREET, SUITE 980, BOSTON
Signature
SV Life Sciences Fund VI, L.P. By: SV Life Sciences Fund VI (GP), L.P., its General Partner By: SVLSF VI, LLC, its General Partner By: Brent M. Faduski, Officer /s/ Brent M. Faduski
Signature date
13 Oct 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

No ticker transaction

Common Stock

Purchase

Transaction value
Shares
+89,783
Change %
+72%
Price
$14.00*
Shares after
214,869
Date
08 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1, F5
No ticker transaction

Common Stock

Purchase

Transaction value
Shares
+89,783
Change %
+72%
Price
$14.00*
Shares after
214,869
Date
08 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1, F5
No ticker transaction

Common Stock

Purchase

Transaction value
Shares
+89,783
Change %
+72%
Price
$14.00*
Shares after
214,869
Date
08 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1, F5
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+1,574,074
Change %
+733%
Price
$0.000000*
Shares after
1,788,943
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+1,574,074
Change %
+733%
Price
$0.000000*
Shares after
1,788,943
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+1,574,074
Change %
+733%
Price
$0.000000*
Shares after
1,788,943
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+475,411
Change %
+27%
Price
$0.000000*
Shares after
2,264,354
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+475,411
Change %
+27%
Price
$0.000000*
Shares after
2,264,354
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+475,411
Change %
+27%
Price
$0.000000*
Shares after
2,264,354
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Footnotes
F1
No ticker transaction

Common Stock

Purchase

Transaction value
Shares
+3,074
Change %
+72%
Price
$14.00*
Shares after
7,356
Date
08 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2, F6
No ticker transaction

Common Stock

Purchase

Transaction value
Shares
+3,074
Change %
+72%
Price
$14.00*
Shares after
7,356
Date
08 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2, F6
No ticker transaction

Common Stock

Purchase

Transaction value
Shares
+3,074
Change %
+72%
Price
$14.00*
Shares after
7,356
Date
08 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2, F6
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+53,892
Change %
+733%
Price
$0.000000*
Shares after
61,248
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+53,892
Change %
+733%
Price
$0.000000*
Shares after
61,248
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+53,892
Change %
+733%
Price
$0.000000*
Shares after
61,248
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+16,277
Change %
+27%
Price
$0.000000*
Shares after
77,525
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+16,277
Change %
+27%
Price
$0.000000*
Shares after
77,525
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+16,277
Change %
+27%
Price
$0.000000*
Shares after
77,525
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Footnotes
F2
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+669,939
Change %
Price
$0.000000*
Shares after
669,939
Date
13 Oct 2026
Ownership
By SV Trex Coinvestment, L.P.
Footnotes
F3
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+669,939
Change %
Price
$0.000000*
Shares after
669,939
Date
13 Oct 2026
Ownership
By SV Trex Coinvestment, L.P.
Footnotes
F3
No ticker transaction

Common Stock

Conversion of derivative security

Transaction value
Shares
+669,939
Change %
Price
$0.000000*
Shares after
669,939
Date
13 Oct 2026
Ownership
By SV Trex Coinvestment, L.P.
Footnotes
F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

No ticker transaction Derivative

Series A Preferred Stock

Conversion of derivative security

Transaction value
Shares
-1,574,074
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Underlying class
Common Stock
Underlying amount
1,574,074
Exercise price
Footnotes
F1, F4
No ticker transaction Derivative

Series A Preferred Stock

Conversion of derivative security

Transaction value
Shares
-1,574,074
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Underlying class
Common Stock
Underlying amount
1,574,074
Exercise price
Footnotes
F1, F4
No ticker transaction Derivative

Series A Preferred Stock

Conversion of derivative security

Transaction value
Shares
-1,574,074
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Underlying class
Common Stock
Underlying amount
1,574,074
Exercise price
Footnotes
F1, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-475,411
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Underlying class
Common Stock
Underlying amount
475,411
Exercise price
Footnotes
F1, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-475,411
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Underlying class
Common Stock
Underlying amount
475,411
Exercise price
Footnotes
F1, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-475,411
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI, L.P.
Underlying class
Common Stock
Underlying amount
475,411
Exercise price
Footnotes
F1, F4
No ticker transaction Derivative

Series A Preferred Stock

Conversion of derivative security

Transaction value
Shares
-53,892
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Underlying class
Common Stock
Underlying amount
53,892
Exercise price
Footnotes
F2, F4
No ticker transaction Derivative

Series A Preferred Stock

Conversion of derivative security

Transaction value
Shares
-53,892
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Underlying class
Common Stock
Underlying amount
53,892
Exercise price
Footnotes
F2, F4
No ticker transaction Derivative

Series A Preferred Stock

Conversion of derivative security

Transaction value
Shares
-53,892
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Underlying class
Common Stock
Underlying amount
53,892
Exercise price
Footnotes
F2, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-16,277
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Underlying class
Common Stock
Underlying amount
16,277
Exercise price
Footnotes
F2, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-16,277
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Underlying class
Common Stock
Underlying amount
16,277
Exercise price
Footnotes
F2, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-16,277
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Life Sciences Fund VI Strategic Partners, L.P.
Underlying class
Common Stock
Underlying amount
16,277
Exercise price
Footnotes
F2, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-669,939
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Trex Coinvestment, L.P.
Underlying class
Common Stock
Underlying amount
669,939
Exercise price
Footnotes
F3, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-669,939
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Trex Coinvestment, L.P.
Underlying class
Common Stock
Underlying amount
669,939
Exercise price
Footnotes
F3, F4
No ticker transaction Derivative

Series B Preferred Stock

Conversion of derivative security

Transaction value
Shares
-669,939
Change %
-100%
Price
$0.000000*
Shares after
0
Date
13 Oct 2026
Ownership
By SV Trex Coinvestment, L.P.
Underlying class
Common Stock
Underlying amount
669,939
Exercise price
Footnotes
F3, F4
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

The shares are held directly by SV Life Sciences Fund VI, L.P. ("SV Fund VI"). SV Life Sciences Fund VI (GP), L.P. (the "GP LP") is the general partner of SV Fund VI, and SVLSF VI, LLC ("SVLSF") is the general partner of GP LP. Investment and voting decisions of SV Fund VI are made by the investment committee of SVLSF. Each of GP LP and SVLSF disclaims beneficial ownership except to the extent of its pecuniary interest, and this report is not an admission of beneficial ownership for any other purpose.

Footnote F2

The shares are held directly by SV Life Sciences Fund VI Strategic Partners, L.P. ("SV Strategic Partners VI"). GP LP is the general partner of SV Strategic Partners VI, and SVLSF is the general partner of GP LP. Investment and voting decisions of SV Strategic Partners VI are made by the investment committee of SVLSF. Each of GP LP and SVLSF disclaims beneficial ownership except to the extent of its pecuniary interest, and this report is not an admission of beneficial ownership for any other purpose.

Footnote F3

The shares are held directly by SV Trex Coinvestment, L.P. ("SV Coinvestment"). GP LP is the general partner of SV Coinvestment, and SVLSF is the general partner of GP LP. Investment and voting decisions of SV Coinvestment are made by the investment committee of SVLSF. Each of GP LP and SVLSF disclaims beneficial ownership and this report is not an admission of beneficial ownership for any other purpose.

Footnote F4

On October 13, 2026, 3.8649 shares of preferred stock automatically converted into one share of common stock upon the closing of the issuer's initial public offering, for no additional consideration. The preferred stock has no expiration date.

Footnote F5

Represents shares purchased by SV Fund VI in the issuer's initial public offering.

Footnote F6

Represents shares purchased by SV Strategic Partners VI in the issuer's initial public offering.

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