Insider · CIK 0001841990
W. Michael Flanagan
officerdirector
Files at RNA (Avidity Biosciences, Inc.), RNA (Atrium Therapeutics, Inc.). First filing Dec 13, 2024, latest Jan 23, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 9
$0 bought, $4.5M sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
RNA: Avidity Biosciences, Inc.
RNAOct 9, 2026 · close 8.40
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 27Weak | Avidity Biosciences, Inc. | $473k 6,534 shares | -7% | - | |
| 21Weak | Avidity Biosciences, Inc. | $171k 2,373 shares | -3% | - | |
| 22Weak | Avidity Biosciences, Inc. | $779k 20,000 shares | -20% | - | |
| 13Weak | Avidity Biosciences, Inc. | $658k 20,000 shares | -20% | - | |
| 30Weak | Avidity Biosciences, Inc. | $366k 11,780 shares | -13% | - | |
| 19Weak | Avidity Biosciences, Inc. | $603k 20,000 shares | -18% | - | |
| 21Weak | Avidity Biosciences, Inc. | $162k 5,672 shares | -6% | - | |
| 31Weak | Avidity Biosciences, Inc. | $416k 12,742 shares | -15% | - | |
| 23Weak | Avidity Biosciences, Inc. | $858k 24,000 shares | -22% | - |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 18, 2026 | RNA Atrium Therapeutics, Inc. | FTax withholding Common Stock | -22,812 | $8.95 | $204k | 31,974 | 20 d ago |
| Feb 27, 2026 | RNA Atrium Therapeutics, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +20,000 | $0.00 | $0 | 20,000 | Mar 2, 2026 |
| Feb 27, 2026 | RNA Avidity Biosciences, Inc. | DDisposition to issuer Common Stock | -150,365 | - | - | 0 | Feb 27, 2026 |
| Feb 27, 2026 | RNA Avidity Biosciences, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -25,000 | - | - | 0 | Feb 27, 2026 |
| Feb 27, 2026 | RNA Avidity Biosciences, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -66,500 | - | - | 0 | Feb 27, 2026 |
| Feb 27, 2026 | RNA Avidity Biosciences, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -96,000 | - | - | 0 | Feb 27, 2026 |
| Feb 27, 2026 | RNA Avidity Biosciences, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -72,000 | - | - | 0 | Feb 27, 2026 |
| Feb 27, 2026 | RNA Avidity Biosciences, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -88,000 | - | - | 0 | Feb 27, 2026 |
| Feb 27, 2026 | RNA Avidity Biosciences, Inc. | DDisposition to issuer Stock Option (Right to Buy)derivative | -50,000 | - | - | 0 | Feb 27, 2026 |
| Jan 21, 2026 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -3,976 | $72.45 | $288k | 87,651 | Jan 23, 2026 |
| Jan 21, 2026 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -2,558 | $72.45 | $185k | 85,093 | Jan 23, 2026 |
| Jan 7, 2026 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -2,373 | $72.23 | $171k | 91,627 | Jan 9, 2026 |
| Dec 17, 2025 | RNA Avidity Biosciences, Inc. | AGrant or award Common Stock | +27,500 | $0.00 | $0 | 107,695 | Dec 19, 2025 |
| Dec 17, 2025 | RNA Avidity Biosciences, Inc. | FTax withholding Common Stock | -13,695 | $71.87 | $984k | 94,000 | Dec 19, 2025 |
| Sep 11, 2025 | RNA Avidity Biosciences, Inc. | MOption exercise Common Stock10b5-1 | +20,000 | $14.22 | $284k | 100,195 | Sep 12, 2025 |
| Sep 11, 2025 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -20,000 | $38.94 | $779k | 80,195 | Sep 12, 2025 |
| Sep 11, 2025 | RNA Avidity Biosciences, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -20,000 | $0.00 | $0 | 76,500 | Sep 12, 2025 |
| Jun 11, 2025 | RNA Avidity Biosciences, Inc. | MOption exercise Common Stock10b5-1 | +20,000 | $14.22 | $284k | 100,195 | Jun 12, 2025 |
| Jun 11, 2025 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -20,000 | $32.88 | $658k | 80,195 | Jun 12, 2025 |
| Jun 11, 2025 | RNA Avidity Biosciences, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -20,000 | $0.00 | $0 | 96,500 | Jun 12, 2025 |
| Mar 20, 2025 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -11,780 | $31.06 | $366k | 80,195 | Mar 21, 2025 |
| Mar 11, 2025 | RNA Avidity Biosciences, Inc. | MOption exercise Common Stock10b5-1 | +20,000 | $14.22 | $284k | 111,975 | Mar 12, 2025 |
| Mar 11, 2025 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -20,000 | $30.13 | $603k | 91,975 | Mar 12, 2025 |
| Mar 11, 2025 | RNA Avidity Biosciences, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -20,000 | $0.00 | $0 | 116,500 | Mar 12, 2025 |
| Jan 21, 2025 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -3,860 | $28.60 | $110k | 93,787 | Jan 23, 2025 |
| Jan 21, 2025 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -1,812 | $28.59 | $52k | 91,975 | Jan 23, 2025 |
| Jan 6, 2025 | RNA Avidity Biosciences, Inc. | AGrant or award Common Stock | +25,000 | $0.00 | $0 | 97,647 | Jan 8, 2025 |
| Jan 6, 2025 | RNA Avidity Biosciences, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +50,000 | $0.00 | $0 | 50,000 | Jan 8, 2025 |
| Dec 18, 2024 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -12,742 | $32.66 | $416k | 72,647 | Dec 19, 2024 |
| Dec 11, 2024 | RNA Avidity Biosciences, Inc. | MOption exercise Common Stock10b5-1 | +24,000 | $22.47 | $539k | 109,389 | Dec 13, 2024 |
| Dec 11, 2024 | RNA Avidity Biosciences, Inc. | SOpen-market sale Common Stock10b5-1 | -24,000 | $35.77 | $858k | 85,389 | Dec 13, 2024 |
| Dec 11, 2024 | RNA Avidity Biosciences, Inc. | MOption exercise Stock Option (Right to Buy)derivative10b5-1 | -24,000 | $0.00 | $0 | 86,000 | Dec 13, 2024 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.