Cook bacon in a Dutch oven over medium, stirring often, until crisp, 8 to 10 minutes. Transfer bacon with a slotted spoon to a plate lined with paper towels to drain, reserving 1/4 cup of the bacon drippings in Dutch oven.

Increase heat to medium-high. Add onion, celery, and bell pepper to Dutch oven; cook, stirring often, until vegetables soften but haven’t begun to brown, about 5 minutes. Add garlic, black pepper, and 1 teaspoon of the salt; cook, stirring often, until fragrant, about 1 minute. Add wine, stirring and scraping to loosen browned bits from bottom of skillet. Add tomatoes and crushed red pepper; cook, stirring often, until most of the liquid has evaporated, about 3 minutes. Stir in stock, rice, and butter; bring to a boil. Reduce heat to low; cover and cook until rice is just tender, 10 to 12 minutes.

Remove from heat. Working quickly, gently stir in shrimp; cover and let stand until shrimp are cooked through, 3 to 5 minutes. Stir in remaining 2 teaspoons salt. Top servings evenly with parsley and bacon.