NuStar Energy Investor Conference Presentation Deck

NuStar Long-term Commitments From Creditworthy Customers Pipeline Segment Contracted¹ Revenues (% 2021 Projections) 37% 40% 23% 64% Take-or-pay Contracts Storage Segment Contracted Revenues (% 2021 Projections²) 36% ■ Structurally Exclusive ■ Other Take-or-pay Contracts ■ Other NuStar Investment-Grade (IG) Customers (% 2021 Revenues) Pipeline Segment -60% IG Storage Segment -59% IG 44% 12% 44% Investment-Grade ■ Large Private or International (Not rated) ■ Other 1 - committed through take or pay contracts or through structural exclusivity (uncommitted lines serving refinery customers with no competition) 2 - after taking into account revenues from terminals in the Northeast, Illinois and Florida, expected to be sold early in the fourth quarter of 2021 27

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