Exhibit 99(d)(xxvii)(vi)
SIXTH AMENDMENT TO THE
SUB-ADVISORY AGREEMENT
This Sixth Amendment to the Sub-Advisory Agreement (the “Amendment”) is made as of June 11, 2026, by and between TIDAL INVESTMENTS LLC (the “Adviser”) and VISTASHARES ADVISORS LLC (the “Sub-Adviser”).
BACKGROUND:
| A. | The Adviser and the Sub-Adviser are parties to a Sub-Advisory Agreement dated as of August 3, 2024, as amended to date (the “Agreement”). |
| B. | Pursuant to Section 22 of the Agreement the parties desire to amend and restate Schedule A to the Agreement to: |
Add the following new series:
VistaShares Space Supercycle ETF
VistaShares Robotics Supercycle ETF
VistaShares Defense Supercycle ETF
VistaShares Shield S&P 500 Enhanced Protection ETF
VistaShares Shield MSCI EAFE Enhanced Protection ETF
VistaShares Shield MSCI EM Enhanced Protection ETF
VistaShares Shield Russell 2000 Enhanced Protection ETF
VistaShares Shield Nasdaq 100 Enhanced Protection ETF
VistaShares Shield Diversified Equity Enhanced Protection ETF
VistaShares Shield Diversified Commodity Enhanced Protection ETF
VistaShares Shield Diversified Income Enhanced Protection ETF; and
Remove the following series:
VistaShares Animal Spirits Daily 2x Strategy ETF;
And reflect the following name changes:
VistaShares DIVBoost Dividend Nobles Distribution ETF to VistaShares DIVBoost Dividend Leaders Distribution ETF
VistaShares DIVBoost Dividend Kings Distribution ETF to VistaShares DIVBoost Dividend Champions Distribution ETF
| C. | This Background section and the Schedule attached to this Amendment are incorporated by reference into, and made a part of, this Amendment. |
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TERMS:
NOW, THEREFORE, intending to be legally bound, the parties agree as follows:
| 1. | The current Schedule A to the Agreement is hereby amended and restated in its entirety as set forth on the Amended and Restated Schedule A attached hereto. | |
| 2. | Miscellaneous. |
| a. | Capitalized terms not defined in this Amendment shall have the respective meanings set forth in the Agreement. | |
| b. | Except as specifically amended by this Amendment, and except as necessary to conform to the intention of the parties hereinabove set forth, the Agreement shall remain unaltered and in full force and effect and is hereby ratified and confirmed. | |
| c. | The Agreement, as amended hereby, together with its Amended and Restated Schedule A, constitutes the complete understanding and agreement of the parties with respect to the subject matter hereof and supersedes all prior communications with respect thereto. This Amendment may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument. The facsimile signature of any party to this Amendment shall constitute the valid and binding execution hereof by such party. |
[Signature
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IN WITNESS WHEREOF, the parties have caused this Amendment to be signed by duly authorized representatives as of the date first set forth above.
| TIDAL INVESTMENTS LLC | ||
| By: | /s/Jay Pestrichelli | |
| Name: | Jay Pestrichelli | |
| Title: | Chief Trading Officer | |
| Date: | 6/12/2026 | |
| VISTASHARES ADVISORS LLC | ||
| By: | /s/Adam Patti | |
| Name: | Adam Patti | |
| Title: | CEO | |
| Date: | 6/12/2026 | |
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Amended and Restated Schedule A
to the
Sub-Advisory
Agreement by and between Tidal Investments LLC and VistaShares
Advisors LLC
(June 11, 2026)
| Fund Name | Sub-Advisory Fee | Effective Date | Trading Authority | Proxy Voting Authority |
| VistaShares Artificial Intelligence Supercycle ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Electrification Supercycle ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 Berkshire Select Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 USA Momentum Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 USA Value Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 USA Quality Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 USA Low Volatility Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Animal Spirits Strategy ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Animal Spirits Daily 2X Strategy ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares ACKtivist Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 ACKtivist Select Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares BigShort Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 BigShort Select Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
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| VistaShares DRUKMacro Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 DRUKMacro Select Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Berkshire Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares BitBonds 1-3 Yr Enhanced Weekly Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares BitBonds 5 Yr Enhanced Weekly Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares BitBonds 10 Yr Enhanced Weekly Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares BitBonds 20 Yr Enhanced Weekly Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Bitcoin Treasury Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Ethereum Treasury Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Ethereum Treasury ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares IPO and Income ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15™ International Innovators Income ETF | 0.04%
|
Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15™ European High Dividend Payers Income ETF | 0.04%
|
Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15™ S&P 100 Distribution ETF | 0.04%
|
Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15™ Global 100 Distribution ETF | 0.04%
|
Commencement of Operations | Non-Discretionary | None |
| VistaShares DIVBoost Dividend Leaders Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
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| VistaShares DIVBoost Dividend Champions Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares DIVBoost Sector Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares DIVBoost High Yield Bond Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares DIVBoost REIT Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares DIVBoost Energy Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares DIVBoost Utilities Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares TEPRTantrum Contrarian Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 TEPRTantrum Contrarian Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares TPLoeb Event Driven Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 TPLoeb Event Driven Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
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| VistaShares TIGR Cub NextGen Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 TIGR Cub NextGen Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares LAFFTech Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 LAFFTech Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares HRVD Select ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 HRVD Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares
GATE Endowment Select ETF |
0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 GATE Endowment Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares
Gulf Soveriegn Select ETF |
0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 Gulf Sovereign Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
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| VistaShares
Nordic Wealth Select ETF |
0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Target 15 Nordic Wealth Distribution ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Space Supercycle ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Robotics Supercycle ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Defense Supercycle ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Shield S&P 500 Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Shield MSCI EAFE Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Shield MSCI EM Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Shield Russell 2000 Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Shield Nasdaq 100 Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
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| VistaShares Shield Diversified Equity Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Shield Diversified Commodity Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
| VistaShares Shield Diversified Income Enhanced Protection ETF | 0.04% | Commencement of Operations | Non-Discretionary | None |
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