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[SCHEDULE 13G/A] Trevi Therapeutics, Inc. SEC Filing

Filing Impact
(Low)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13G/A

Rhea-AI Filing Summary

Viking Global Investors and affiliated entities report beneficial ownership of 7,505,694 shares of Trevi Therapeutics (TRVI), representing 5.9% of the common stock. The holdings consist of 1,543,000 shares directly owned by two affiliated entities (1,033,810 by VGOP and 509,190 by VGOD) and 5,962,694 shares issuable upon exercise of pre-funded warrants exercisable at $0.001 per share. The filing clarifies the ownership chain through multiple Delaware and Cayman entities and notes shared voting and dispositive power among the reporting persons, including O. Andreas Halvorsen, David C. Ott and Rose S. Shabet. The statement affirms these securities were not acquired to change or influence control of the issuer.

Positive

  • Material passive stake disclosed: Viking Global Investors and affiliates beneficially own 7,505,694 shares (5.9%) of TRVI.
  • Warrant transparency: Filing specifies 5,962,694 shares are exercisable upon exercise of pre-funded warrants at $0.001 per share.
  • Clear ownership chain: The statement details the fund structure and identifies persons with shared voting and dispositive authority, including Halvorsen, Ott and Shabet.
  • Filed as passive (Schedule 13G/A): Reporting persons certify the position is not for changing or influencing control of the issuer.

Negative

  • None.

Insights

TL;DR: Viking Global-affiliated funds hold 5.9% of TRVI, combining direct shares and warrant exposure, a material passive stake.

The Schedule 13G/A discloses a 5.9% economic and voting interest in Trevi Therapeutics via direct holdings and exercisable pre-funded warrants. For investors, the key fact is the combined exposure of 7,505,694 shares, of which 5,962,694 are currently exercisable warrants, which could increase voting shares if exercised. The filing is presented under passive-investor rules and expressly states the position is not intended to influence control. This is a material disclosure by size but framed as non-activist by the reporting persons.

TL;DR: Multiple affiliated entities and named executives share voting/dispositive power over a 5.9% stake, disclosed under Schedule 13G/A.

The document maps the control chain: VGI provides managerial services and may be deemed the beneficial owner under Rule 13d-3, while Opportunities Parent and several GP/LP entities hold and control the underlying economic interests. Executive Committee members Halvorsen, Ott and Shabet are identified as having shared authority, but the certification confirms no intent to change control. From a governance perspective, this is a routine but material ownership disclosure highlighting the practical delegation of voting and disposition across fund structures.






Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)






SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G




Comment for Type of Reporting Person: See Item 4


SCHEDULE 13G



VIKING GLOBAL INVESTORS LP
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of VIKING GLOBAL INVESTORS LP (1)(2)(3)
Date:08/14/2025
Viking Global Opportunities Parent GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Parent GP LLC (1)(2)(3)
Date:08/14/2025
Viking Global Opportunities GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities GP LLC (1)(2)(3)
Date:08/14/2025
Viking Global Opportunities Portfolio GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Portfolio GP LLC (1)(2)(3)
Date:08/14/2025
Viking Global Opportunities Illiquid Investments Sub-Master LP
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Illiquid Investments Sub-Master LP (1)(2)(3)
Date:08/14/2025
Viking Global Opportunities Drawdown GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Drawdown GP LLC (1)(2)(3)
Date:08/14/2025
Viking Global Opportunities Drawdown Portfolio GP LLC
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Drawdown Portfolio GP LLC (1)(2)(3)
Date:08/14/2025
Viking Global Opportunities Drawdown (Aggregator) LP
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Viking Global Opportunities Drawdown (Aggregator) LP (1)(2)(3)
Date:08/14/2025
HALVORSEN OLE ANDREAS
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of O. Andreas Halvorsen (1)
Date:08/14/2025
Ott David C.
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of David C. Ott (2)
Date:08/14/2025
Shabet Rose Sharon
Signature:/s/ Scott M. Hendler
Name/Title:Scott M. Hendler on behalf of Rose S. Shabet (3)
Date:08/14/2025

Comments accompanying signature: (1) Scott M. Hendler is signing on behalf of O. Andreas Halvorsen, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737). (2) Scott M. Hendler is signing on behalf of David C. Ott, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737). (3) Scott M. Hendler is signing on behalf of Rose S. Shabet, individually and as an Executive Committee Member of VIKING GLOBAL PARTNERS LLC, on behalf of VIKING GLOBAL INVESTORS LP, and as an Executive Committee Member of VIKING GLOBAL OPPORTUNITIES PARENT GP LLC, on behalf of itself and VIKING GLOBAL OPPORTUNITIES GP LLC, VIKING GLOBAL OPPORTUNITIES PORTFOLIO GP LLC, VIKING GLOBAL OPPORTUNITIES ILLIQUID INVESTMENTS SUB-MASTER LP, VIKING GLOBAL OPPORTUNITIES DRAWDOWN GP LLC, VIKING GLOBAL OPPORTUNITIES DRAWDOWN PORTFOLIO GP LLC and VIKING GLOBAL OPPORTUNITIES DRAWDOWN (AGGREGATOR) LP, pursuant to an authorization and designation letter dated February 9, 2021, which was previously filed with the Commission as an exhibit to a Form 13G filed by Mr. Halvorsen on February 12, 2021 (SEC File No. 005-49737).
Exhibit Information

EXHIBIT A - JOINT FILING AGREEMENT

FAQ

How many Trevi Therapeutics (TRVI) shares does Viking Global beneficially own?

The reporting persons beneficially own 7,505,694 shares of Trevi Therapeutics common stock, representing 5.9% of the class.

How much of the Viking Global position in TRVI is from exercisable warrants?

The filing states 5,962,694 shares are issuable upon exercise of pre-funded warrants exercisable at $0.001 per share.

Do the reporting persons intend to influence control of Trevi Therapeutics?

No. The filing includes a certification that the securities were not acquired and are not held to change or influence control of the issuer.

Which individuals are identified as having shared voting authority over the TRVI stake?

O. Andreas Halvorsen, David C. Ott and Rose S. Shabet are named as Executive Committee members with shared authority to vote and dispose of the shares.

What is the total share count used to calculate the 5.9% ownership percentage?

The percentage is based on 121,775,753 shares outstanding as of June 30, 2025, plus the 5,962,694 shares issuable upon exercise of the warrants.
Trevi Therapeutics

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1.41B
113.69M
0.72%
92.78%
9.6%
Biotechnology
Pharmaceutical Preparations
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United States
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