Yann Mazabraud, EVP and Head of International at Rhythm Pharmaceuticals ($RYTM), sold about $5.4 million in company shares across five open market transactions over the past year. His most recent sale occurred on April 29, 2025. These sales rank him 1,827th among 11,678 insiders by total value sold, below the average of $8.6 million per insider and 6.4 transactions. Mazabraud made no open market purchases in this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| April 1, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 2500 | $0.00 | 5,000.0000 | 64,984,361 | 33.33% | 0.00% |
| April 1, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 12875 | $0.00 | 66,030.0000 | 64,984,361 | 24.22% | 0.02% |
| April 1, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 10375 | $0.00 | 10,375.0000 | 64,984,361 | 50.00% | 0.02% |
| March 2, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Stock Options (Right to Buy) | 35000 | $0.00 | 35,000.0000 | 64,984,361 | 9999.99% | 0.05% |
| Feb. 14, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 10000 | $0.00 | 53,155.0000 | 64,984,361 | 23.17% | 0.02% |
| Feb. 14, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 10000 | $0.00 | 30,000.0000 | 64,984,361 | 25.00% | 0.02% |
| Feb. 11, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Restricted Stock Units | 23350 | $0.00 | 23,350.0000 | 64,984,361 | 9999.99% | 0.04% |
| Feb. 1, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 5500 | $0.00 | 11,000.0000 | 64,984,361 | 33.33% | 0.01% |
| Feb. 1, 2026 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 5500 | $0.00 | 43,155.0000 | 64,984,361 | 14.61% | 0.01% |
| April 29, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 6745 | $65.08 | 37,655.0000 | 63,059,165 | 15.19% | 0.01% |
| April 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 10375 | $0.00 | 32,995.0000 | 63,059,165 | 45.87% | 0.02% |
| April 15, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 2500 | $0.00 | 7,500.0000 | 63,059,165 | 25.00% | 0.00% |
| April 15, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 8905 | $0.00 | 0.0000 | 63,059,165 | 100.00% | 0.01% |
| April 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 10375 | $0.00 | 20,750.0000 | 63,059,165 | 33.33% | 0.02% |
| April 15, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 11405 | $0.00 | 44,400.0000 | 63,059,165 | 34.57% | 0.02% |
| April 8, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 8438 | $60.37 | 31,932.0000 | 63,059,165 | 20.90% | 0.01% |
| April 8, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 9312 | $61.54 | 22,620.0000 | 63,059,165 | 29.16% | 0.01% |
| March 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Stock Options (Right to Buy) | 75000 | $0.00 | 25,000.0000 | 60,995,204 | 75.00% | 0.12% |
| March 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 75000 | $22.28 | 115,370.0000 | 60,995,204 | 185.78% | 0.12% |
| March 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 19197 | $50.79 | 96,173.0000 | 60,995,204 | 16.64% | 0.03% |
| March 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 55803 | $51.72 | 40,370.0000 | 60,995,204 | 58.02% | 0.09% |
| Feb. 16, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 5500 | $0.00 | 16,500.0000 | 60,995,204 | 25.00% | 0.01% |
| Feb. 16, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 5500 | $0.00 | 40,370.0000 | 60,995,204 | 15.77% | 0.01% |
| Feb. 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Restricted Stock Units | 40000 | $0.00 | 40,000.0000 | 60,995,204 | 9999.99% | 0.07% |
| Feb. 14, 2025 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Stock Options (Right to Buy) | 60000 | $0.00 | 60,000.0000 | 60,995,204 | 9999.99% | 0.10% |
| April 14, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 10375 | $0.00 | 31,125.0000 | 60,143,558 | 25.00% | 0.02% |
| April 15, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | D | Restricted Stock Units | 2031 | $0.00 | 0.0000 | 60,143,558 | 100.00% | 0.00% |
| April 15, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | D | Restricted Stock Units | 6874 | $0.00 | 0.0000 | 60,143,558 | 100.00% | 0.01% |
| April 15, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Restricted Stock Units | 8905 | $0.00 | 8,905.0000 | 60,143,558 | 9999.99% | 0.01% |
| April 15, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Restricted Stock Units | 10000 | $0.00 | 10,000.0000 | 60,143,558 | 9999.99% | 0.02% |
| April 14, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 10375 | $0.00 | 34,870.0000 | 60,143,558 | 22.93% | 0.02% |
| March 19, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 16000 | $39.22 | 24,495.0000 | 57,673,128 | 39.51% | 0.03% |
| Feb. 16, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Common Stock | 33750 | $0.00 | 40,495.0000 | 57,673,128 | 500.37% | 0.06% |
| Feb. 16, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Restricted Stock Units | 22000 | $0.00 | 22,000.0000 | 57,673,128 | 9999.99% | 0.04% |
| Feb. 16, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Stock Option (Right to Buy) | 67000 | $0.00 | 67,000.0000 | 57,673,128 | 9999.99% | 0.12% |
| Feb. 9, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 3438 | $0.00 | 6,874.0000 | 57,673,128 | 33.34% | 0.01% |
| Feb. 13, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 957 | $49.84 | 6,745.0000 | 57,673,128 | 12.43% | 0.00% |
| Feb. 12, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 1594 | $51.38 | 7,702.0000 | 57,673,128 | 17.15% | 0.00% |
| Feb. 11, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 2031 | $0.00 | 9,296.0000 | 57,673,128 | 27.96% | 0.00% |
| Feb. 9, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 3438 | $0.00 | 7,265.0000 | 57,673,128 | 89.84% | 0.01% |
| Feb. 11, 2024 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 2031 | $0.00 | 2,031.0000 | 57,673,128 | 50.00% | 0.00% |
| April 14, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | D | Restricted Stock Units | 41500 | $0.00 | 0.0000 | 56,708,975 | 100.00% | 0.07% |
| April 14, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Restricted Stock Units | 41500 | $0.00 | 41,500.0000 | 56,708,975 | 9999.99% | 0.07% |
| Feb. 14, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 1177 | $27.03 | 3,827.0000 | 52,120,701 | 23.52% | 0.00% |
| Feb. 9, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 1563 | $27.51 | 2,973.0000 | 52,120,701 | 34.46% | 0.00% |
| Feb. 11, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 2031 | $0.00 | 5,004.0000 | 52,120,701 | 68.31% | 0.00% |
| Feb. 11, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 2031 | $0.00 | 4,062.0000 | 52,120,701 | 33.33% | 0.00% |
| Feb. 9, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | S | Common Stock | 1548 | $27.66 | 2,988.0000 | 52,120,701 | 34.13% | 0.00% |
| Feb. 9, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Common Stock | 3438 | $0.00 | 4,536.0000 | 52,120,701 | 313.11% | 0.01% |
| Feb. 9, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | M | Restricted Stock Units | 3438 | $0.00 | 10,312.0000 | 52,120,701 | 25.00% | 0.01% |
| Feb. 1, 2023 | RHYTHM PHARMACEUTICALS, INC. | $RYTM | Mazabraud Yann | EVP, Head of International | A | Restricted Stock Units | 41500 | $0.00 | 41,500.0000 | 52,120,701 | 9999.99% | 0.08% |