Bruce Booth, Director at Sionna Therapeutics, Inc. (SION), sold 568,138 shares at $33.38 ($18.4M) on 2025-10-16, disclosed to the SEC on 2025-10-20.
Scheduled sale ($18.4M) by Director under a pre-arranged 10b5-1 plan. Pre-set trade — not a discretionary signal on the stock.
Nothing distinguishes this filing.
| # | Price | Shares | Value | % of Total |
|---|---|---|---|---|
| 1 | $30.15 | 8,596 | $259K | 1.4% |
| 2 | $30.15 | 8,596 | $259K | 1.4% |
| 3 | $30.15 | 1,804 | $54K | 0.3% |
| 4 | $30.15 | 1,804 | $54K | 0.3% |
| 5 | $31.69 | 9,470 | $300K | 1.6% |
| 6 | $31.69 | 45,117 |
| $1.4M |
| 7.8% |
| 7 | $31.69 | 9,470 | $300K | 1.6% |
| 8 | $31.69 | 45,117 | $1.4M | 7.8% |
| 9 | $32.84 | 73,296 | $2.4M | 13.1% |
| 10 | $32.84 | 15,384 | $505K | 2.8% |
| 11 | $32.84 | 15,384 | $505K | 2.8% |
| 12 | $32.84 | 73,296 | $2.4M | 13.1% |
| 13 | $33.38 | 12,888 | $430K | 2.3% |
| 14 | $33.38 | 12,888 | $430K | 2.3% |
| 15 | $33.38 | 2,705 | $90K | 0.5% |
| 16 | $33.38 | 2,705 | $90K | 0.5% |
| 17 | $32.10 | 28,821 | $925K | 5.0% |
| 18 | $32.10 | 28,821 | $925K | 5.0% |
| 19 | $32.10 | 6,049 | $194K | 1.1% |
| 20 | $32.10 | 6,049 | $194K | 1.1% |
| 21 | $32.71 | 21,451 | $702K | 3.8% |
| 22 | $32.71 | 21,451 | $702K | 3.8% |
| 23 | $32.71 | 4,503 | $147K | 0.8% |
| 24 | $32.71 | 4,503 | $147K | 0.8% |
| 25 | $33.47 | 52 | $2K | 0.0% |
| 26 | $33.47 | 248 | $8K | 0.0% |
| 27 | $31.79 | 20,485 | $651K | 3.5% |
| 28 | $31.79 | 4,300 | $137K | 0.7% |
| 29 | $31.79 | 20,485 | $651K | 3.5% |
| 30 | $32.33 | 25,788 | $834K | 4.5% |
| 31 | $32.33 | 25,788 | $834K | 4.5% |
| 32 | $32.33 | 5,412 | $175K | 1.0% |
| 33 | $32.33 | 5,412 | $175K | 1.0% |
| Total | $32.31 avg | 568,138 | $18.4M | 100% |
| Filing → |
| KYMR | SELL | 2026-06-30 | $3.4M | — | Filing → |
| KYMR | SELL | 2026-06-25 | $34.8M | — | Filing → |
| KYMR | SELL | 2026-06-25 | $44.0M | — | Filing → |