SEC Insider Transactions from Diamond Howard.

Last updated: 2026-03-14 11:48 UTC | Total transactions: 54

Diamond Howard, EVP of Legal and Corporate Affairs at Frontier Group Holdings ($ULCC), sold shares on the open market three times in the last year, totaling about $527 thousand. The most recent sale occurred on September 5, 2025. These sales rank 6,314th among 11,678 insiders in our database, where the average is $8.6 million across about 6.4 transactions. Howard made no open market purchases during this period.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Feb. 8, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 11328 $0.00 0.0000 228,950,914 100.00% 0.00%
Feb. 8, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 2818 $6.52 157,321.0000 228,950,914 1.76% 0.00%
Feb. 8, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 6442 $0.00 0.0000 228,950,914 100.00% 0.00%
Feb. 6, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 18335 $0.00 36,671.0000 228,950,914 33.33% 0.01%
Feb. 6, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 18335 $0.00 155,346.0000 228,950,914 13.38% 0.01%
Feb. 6, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 8021 $5.65 147,325.0000 228,950,914 5.16% 0.00%
Feb. 8, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 11328 $0.00 158,653.0000 228,950,914 7.69% 0.00%
Feb. 8, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 4956 $6.52 153,697.0000 228,950,914 3.12% 0.00%
Feb. 8, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 6442 $0.00 160,139.0000 228,950,914 4.19% 0.00%
Feb. 5, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs A Common Stock 3224 $0.00 138,421.0000 228,950,914 2.38% 0.00%
Feb. 6, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 1410 $5.65 137,011.0000 228,950,914 1.02% 0.00%
Feb. 5, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs A Restricted Stock Units 88496 $0.00 88,496.0000 228,950,914 9999.99% 0.04%
Feb. 1, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 45512 $0.00 155,108.0000 228,950,914 41.53% 0.02%
Feb. 1, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 45512 $0.00 45,512.0000 228,950,914 50.00% 0.02%
Feb. 1, 2026 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 19911 $4.64 135,197.0000 228,950,914 12.84% 0.01%
Oct. 25, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 27533 $4.15 109,596.0000 227,248,474 20.08% 0.01%
Oct. 25, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 62934 $0.00 137,129.0000 227,248,474 84.82% 0.03%
Oct. 25, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 62934 $0.00 62,934.0000 227,248,474 50.00% 0.03%
Sept. 5, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs S Common Stock 35401 $5.50 74,195.0000 227,248,474 32.30% 0.02%
Sept. 2, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs S Common Stock 26306 $5.67 141,099.0000 227,248,474 15.71% 0.01%
Sept. 3, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs S Common Stock 31503 $5.80 109,596.0000 227,248,474 22.33% 0.01%
March 6, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs S Common Stock 8481 $7.11 167,405.0000 227,248,474 4.82% 0.00%
Feb. 20, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs S Common Stock 87830 $8.77 175,886.0000 227,248,474 33.30% 0.04%
Feb. 18, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs S Common Stock 326581 $8.90 307,592.0000 227,248,474 51.50% 0.14%
Feb. 19, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs S Common Stock 43876 $9.20 263,716.0000 227,248,474 14.26% 0.02%
Feb. 8, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 11331 $0.00 637,430.0000 0 1.81% 0.00%
Feb. 8, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 11328 $0.00 630,104.0000 0 1.83% 0.00%
Feb. 8, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 4005 $9.34 626,099.0000 0 0.64% 0.00%
Feb. 8, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 3257 $9.34 634,173.0000 0 0.51% 0.00%
Feb. 8, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 11328 $0.00 11,328.0000 0 50.00% 0.00%
Feb. 8, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 11331 $0.00 6,442.0000 0 63.75% 0.00%
Feb. 6, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs A Restricted Stock Units 55006 $0.00 55,006.0000 0 9999.99% 0.00%
Feb. 1, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 45511 $0.00 623,986.0000 0 7.87% 0.00%
Feb. 1, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 14008 $8.43 609,978.0000 0 2.24% 0.00%
Feb. 3, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 12348 $0.00 622,326.0000 0 2.02% 0.00%
Feb. 3, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 3550 $8.43 618,776.0000 0 0.57% 0.00%
Feb. 1, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 45511 $0.00 91,024.0000 0 33.33% 0.00%
Feb. 3, 2025 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 12348 $0.00 0.0000 0 100.00% 0.00%
Oct. 25, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 27533 $6.98 578,475.0000 0 4.54% 0.00%
Oct. 25, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 62934 $0.00 125,868.0000 0 33.33% 0.00%
Oct. 25, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 62934 $0.00 606,008.0000 0 11.59% 0.00%
Feb. 23, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 3368 $7.26 543,074.0000 0 0.62% 0.00%
Feb. 23, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 11717 $0.00 0.0000 0 100.00% 0.00%
Feb. 23, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 11717 $0.00 546,442.0000 0 2.19% 0.00%
Feb. 8, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 14060 $0.00 17,773.0000 0 44.17% 0.00%
Feb. 8, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 11328 $0.00 527,963.0000 0 2.19% 0.00%
Feb. 8, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 3256 $6.89 524,707.0000 0 0.62% 0.00%
Feb. 8, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 14060 $0.00 538,767.0000 0 2.68% 0.00%
Feb. 8, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 4042 $6.89 534,725.0000 0 0.75% 0.00%
Feb. 8, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 11328 $0.00 22,656.0000 0 33.33% 0.00%
Feb. 3, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Restricted Stock Units 12348 $0.00 12,348.0000 0 50.00% 0.00%
Feb. 3, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs M Common Stock 12348 $0.00 520,895.0000 0 2.43% 0.00%
Feb. 3, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs F Common Stock 4260 $5.40 516,635.0000 0 0.82% 0.00%
Feb. 1, 2024 Frontier Group Holdings, Inc. $ULCC Diamond Howard EVP, Legal & Corporate Affairs A Restricted Stock Units 136535 $0.00 136,535.0000 0 9999.99% 0.00%