SEC Insider Transactions from Smith Hunter C.

Last updated: 2026-03-16 13:03 UTC | Total transactions: 105

Smith Hunter C, Chief Financial Officer of Rhythm Pharmaceuticals, Inc. ($RYTM), sold shares on the open market thirty times in the last 365 days for a total of nearly $9.8 million. His most recent sale occurred on February 19, 2026. These $RYTM insider sales rank 1,151st among over 11,600 individual insiders in our database, where the average is $8.6 million across about six transactions. Smith Hunter C 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
March 2, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Options (Right to Buy) 6099 $0.00 91,401.0000 64,984,361 6.26% 0.01%
March 2, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 6099 $6.80 116,611.0000 64,984,361 5.52% 0.01%
Feb. 17, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 200 $103.84 114,897.0000 64,984,361 0.17% 0.00%
Feb. 17, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1200 $99.42 117,266.0000 64,984,361 1.01% 0.00%
Feb. 17, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 200 $100.52 117,066.0000 64,984,361 0.17% 0.00%
Feb. 17, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 900 $101.70 116,166.0000 64,984,361 0.77% 0.00%
Feb. 17, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1069 $103.00 115,097.0000 64,984,361 0.92% 0.00%
Feb. 19, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 585 $103.28 110,512.0000 64,984,361 0.53% 0.00%
Feb. 19, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 800 $102.10 111,097.0000 64,984,361 0.71% 0.00%
Feb. 19, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1692 $100.92 111,897.0000 64,984,361 1.49% 0.00%
Feb. 19, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1308 $100.27 113,589.0000 64,984,361 1.14% 0.00%
Feb. 11, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Restricted Stock Units 25000 $0.00 25,000.0000 64,984,361 9999.99% 0.04%
Feb. 11, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Stock Options (Right to Buy) 37500 $0.00 37,500.0000 64,984,361 9999.99% 0.06%
Feb. 10, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 700 $103.68 122,924.0000 64,984,361 0.57% 0.00%
Feb. 10, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1913 $102.66 123,624.0000 64,984,361 1.52% 0.00%
Feb. 10, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 100 $104.76 122,824.0000 64,984,361 0.08% 0.00%
Feb. 11, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 2266 $98.37 120,558.0000 64,984,361 1.84% 0.00%
Feb. 11, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 400 $99.44 120,158.0000 64,984,361 0.33% 0.00%
Feb. 11, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 100 $100.85 120,058.0000 64,984,361 0.08% 0.00%
Feb. 12, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 292 $96.26 119,766.0000 64,984,361 0.24% 0.00%
Feb. 12, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 400 $97.67 119,366.0000 64,984,361 0.33% 0.00%
Feb. 12, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 800 $98.99 118,566.0000 64,984,361 0.67% 0.00%
Feb. 12, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 100 $100.10 118,466.0000 64,984,361 0.08% 0.00%
Feb. 5, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 3381 $106.06 125,537.0000 64,984,361 2.62% 0.01%
Feb. 4, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 747 $107.67 128,918.0000 64,984,361 0.58% 0.00%
Feb. 4, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1000 $106.60 129,665.0000 64,984,361 0.77% 0.00%
Feb. 4, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1500 $104.74 130,665.0000 64,984,361 1.13% 0.00%
Feb. 1, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 26000 $0.00 142,915.0000 64,984,361 22.24% 0.04%
Feb. 1, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 10413 $0.00 31,237.0000 64,984,361 25.00% 0.02%
Feb. 1, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 6600 $0.00 13,200.0000 64,984,361 33.33% 0.01%
Feb. 1, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 4925 $0.00 4,925.0000 64,984,361 50.00% 0.01%
Feb. 1, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 4062 $0.00 0.0000 64,984,361 100.00% 0.01%
Feb. 1, 2026 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer F Common Stock 10750 $108.99 132,165.0000 64,984,361 7.52% 0.02%
Aug. 12, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 24611 $96.33 116,915.0000 63,684,359 17.39% 0.04%
Aug. 13, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Options (Right to Buy) 3477 $0.00 0.0000 63,684,359 100.00% 0.01%
Aug. 12, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Options (Right to Buy) 24611 $0.00 3,477.0000 63,684,359 87.62% 0.04%
Aug. 13, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 3477 $96.00 116,915.0000 63,684,359 2.89% 0.01%
Aug. 13, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 3477 $6.88 120,392.0000 63,684,359 2.97% 0.01%
Aug. 12, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 24611 $6.88 141,526.0000 63,684,359 21.05% 0.04%
July 9, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 17113 $75.38 141,922.0000 63,684,359 10.76% 0.03%
July 9, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1607 $76.17 140,315.0000 63,684,359 1.13% 0.00%
July 9, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 42120 $6.88 159,035.0000 63,684,359 36.03% 0.07%
July 9, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 23400 $84.50 116,915.0000 63,684,359 16.68% 0.04%
July 9, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Options (Right to Buy) 42120 $0.00 28,088.0000 63,684,359 59.99% 0.07%
July 7, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 6986 $6.88 116,915.0000 63,684,359 6.36% 0.01%
July 7, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Options (Right to Buy) 6986 $0.00 70,208.0000 63,684,359 9.05% 0.01%
May 30, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 23400 $6.88 133,329.0000 63,059,165 21.29% 0.04%
May 30, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 4407 $60.93 128,922.0000 63,059,165 3.31% 0.01%
May 30, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 18993 $61.52 109,929.0000 63,059,165 14.73% 0.03%
May 30, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Options (Right to Buy) 23400 $0.00 77,194.0000 63,059,165 23.26% 0.04%
Feb. 14, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Restricted Stock Units 41650 $0.00 41,650.0000 60,995,204 9999.99% 0.07%
Feb. 16, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 6600 $0.00 112,144.0000 60,995,204 6.25% 0.01%
Feb. 19, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 2215 $57.22 109,929.0000 60,995,204 1.98% 0.00%
Feb. 14, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Stock Options (Right to Buy) 62500 $0.00 62,500.0000 60,995,204 9999.99% 0.10%
Feb. 16, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 6600 $0.00 19,800.0000 60,995,204 25.00% 0.01%
Feb. 12, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 12 $56.22 105,544.0000 60,995,204 0.01% 0.00%
Feb. 12, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 739 $56.39 105,556.0000 60,995,204 0.70% 0.00%
Feb. 9, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 4062 $0.00 4,062.0000 60,995,204 50.00% 0.01%
Feb. 9, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 4062 $0.00 105,248.0000 60,995,204 4.01% 0.01%
Feb. 11, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 2343 $0.00 107,591.0000 60,995,204 2.23% 0.00%
Feb. 11, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1291 $57.51 106,300.0000 60,995,204 1.20% 0.00%
Feb. 11, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 5 $57.53 106,295.0000 60,995,204 0.00% 0.00%
Feb. 11, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 2343 $0.00 0.0000 60,995,204 100.00% 0.00%
Feb. 1, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 4925 $0.00 9,850.0000 60,995,204 33.33% 0.01%
Feb. 1, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 4925 $0.00 102,864.0000 60,995,204 5.03% 0.01%
Feb. 4, 2025 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1678 $59.43 101,186.0000 60,995,204 1.63% 0.00%
March 19, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 15515 $39.22 97,939.0000 57,673,128 13.68% 0.03%
Feb. 16, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Restricted Stock Units 26400 $0.00 26,400.0000 57,673,128 9999.99% 0.05%
Feb. 16, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Common Stock 33750 $0.00 113,454.0000 57,673,128 42.34% 0.06%
Feb. 16, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Stock Option (Right to Buy) 80400 $0.00 80,400.0000 57,673,128 9999.99% 0.14%
Feb. 13, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 709 $49.82 79,704.0000 57,673,128 0.88% 0.00%
Feb. 11, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 2344 $0.00 2,343.0000 57,673,128 50.01% 0.00%
Feb. 9, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 4063 $0.00 8,124.0000 57,673,128 33.34% 0.01%
Feb. 12, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1209 $51.38 80,413.0000 57,673,128 1.48% 0.00%
Feb. 11, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 2344 $0.00 81,622.0000 57,673,128 2.96% 0.00%
Feb. 9, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 4063 $0.00 79,278.0000 57,673,128 5.40% 0.01%
Feb. 1, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 4925 $0.00 76,831.0000 57,673,128 6.85% 0.01%
Feb. 1, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 4925 $0.00 14,775.0000 57,673,128 25.00% 0.01%
Feb. 1, 2024 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1616 $45.06 75,215.0000 57,673,128 2.10% 0.00%
Dec. 29, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 10500 $6.88 71,906.0000 57,874,960 17.10% 0.02%
Dec. 29, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Option (Right to Buy) 10500 $0.00 100,594.0000 57,874,960 9.45% 0.02%
Dec. 5, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Option (Right to Buy) 7026 $0.00 131,094.0000 57,874,960 5.09% 0.01%
Dec. 5, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 7026 $6.88 68,432.0000 57,874,960 11.44% 0.01%
Dec. 5, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 7026 $35.06 61,406.0000 57,874,960 10.27% 0.01%
Dec. 6, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 20000 $6.88 81,406.0000 57,874,960 32.57% 0.03%
Dec. 6, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Option (Right to Buy) 20000 $0.00 111,094.0000 57,874,960 15.26% 0.03%
Dec. 6, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 20000 $40.00 61,406.0000 57,874,960 24.57% 0.03%
Nov. 24, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 10974 $6.88 72,380.0000 57,874,960 17.87% 0.02%
Nov. 24, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Option (Right to Buy) 10974 $0.00 138,120.0000 57,874,960 7.36% 0.02%
Nov. 24, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 10974 $35.02 61,406.0000 57,874,960 15.16% 0.02%
Nov. 14, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 12000 $30.38 61,406.0000 57,874,960 16.35% 0.02%
Nov. 14, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 12000 $6.88 73,406.0000 57,874,960 19.54% 0.02%
Nov. 14, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Option (Right to Buy) 12000 $0.00 149,094.0000 57,874,960 7.45% 0.02%
June 22, 2023 Spyre Therapeutics, Inc. $SYRE Smith Hunter C Director A Stock Option (right to buy) 1950000 $0.00 1,950,000.0000 0 9999.99% 0.00%
June 16, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Stock Option (right to buy) 2000 $0.00 161,094.0000 56,708,975 1.23% 0.00%
June 16, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 2000 $6.88 61,406.0000 56,708,975 3.37% 0.00%
Feb. 9, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1413 $27.51 57,764.0000 52,120,701 2.39% 0.00%
Feb. 11, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 2344 $0.00 60,108.0000 52,120,701 4.06% 0.00%
Feb. 14, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 702 $26.87 59,406.0000 52,120,701 1.17% 0.00%
Feb. 11, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 2344 $0.00 4,687.0000 52,120,701 33.34% 0.00%
Feb. 9, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Common Stock 4063 $0.00 59,177.0000 52,120,701 7.37% 0.01%
Feb. 9, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer M Restricted Stock Units 4063 $0.00 12,187.0000 52,120,701 25.00% 0.01%
Feb. 9, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer S Common Stock 1398 $27.66 57,779.0000 52,120,701 2.36% 0.00%
Feb. 1, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Stock Option (Right to Buy) 53600 $0.00 53,600.0000 52,120,701 9999.99% 0.10%
Feb. 1, 2023 RHYTHM PHARMACEUTICALS, INC. $RYTM Smith Hunter C Chief Financial Officer A Restricted Stock Units 19700 $0.00 19,700.0000 52,120,701 9999.99% 0.04%