Insider · CIK 0001471518
S. Louise Phanstiel
Files at MYGN (MYRIAD GENETICS INC), BFLY (Butterfly Network, Inc.). First filing Dec 17, 2025, latest Aug 17, 2026.
S. Louise Phanstiel files SEC Form 4 as director at BFLY (Butterfly Network, Inc.), and also at MYGN (MYRIAD GENETICS INC). Since Dec 17, 2025, S. Louise Phanstiel has reported 3 open-market buys worth $2.1M and 0 open-market sells worth $0, the latest filed on Aug 17, 2026.
A track record needs three past buys with six months of prices behind them; S. Louise Phanstiel has 2, so none is measured yet.
The newest scored trade: bought $1000k of BFLY on Aug 14, 2026, filed Aug 17, 2026, scored 50 (moderate). In the last 12 months: 3 buys worth $2.1M and 0 sells worth $0.
Where the trades landed
Last year at the 2 companies this insider has traded most, with each buy and sell on the bar it happened.
BFLY: Butterfly Network, Inc.
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™
MYGN: MYRIAD GENETICS INC
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 |
|---|---|---|---|---|---|
| 50Moderate | BFLYbuy Butterfly Network, Inc. | $1000k 115,200 shares | +62% | +541% from low-9% from high | |
| 59Moderate | MYRIAD GENETICS INC | $495k 104,507 shares | +59% | +24% from low-59% from high | |
| 58Moderate | Butterfly Network, Inc. | $571k 185,261 shares | - | +142% from low-33% from high |
Transactions
Every row this insider has filed, 9 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 14, 2026 | BFLY Butterfly Network, Inc. | POpen-market purchase Class A Common Stockindirect: By The Phanstiel Trust u/a/d 2/5/02 | +115,200 | $8.68 | $1000k | 300,461 | Aug 17, 2026 |
| Jun 22, 2026 | BFLY Butterfly Network, Inc. | AGrant or award Class A Common Stock | +25,447 | $0.00 | $0 | 390,952 | Jun 22, 2026 |
| Jun 4, 2026 | MYGN MYRIAD GENETICS INC | AGrant or award Common Stock | +59,701 | $0.00 | $0 | 341,652 | Jun 5, 2026 |
| Feb 25, 2026 | MYGN MYRIAD GENETICS INC | POpen-market purchase Common Stock | +6,100 | $4.74 | $29k | 183,544 | Feb 27, 2026 |
| Feb 26, 2026 | MYGN MYRIAD GENETICS INC | POpen-market purchase Common Stock | +50,407 | $4.80 | $242k | 233,951 | Feb 27, 2026 |
| Feb 27, 2026 | MYGN MYRIAD GENETICS INC | POpen-market purchase Common Stock | +48,000 | $4.66 | $224k | 281,951 | Feb 27, 2026 |
| Dec 15, 2025 | BFLY Butterfly Network, Inc. | POpen-market purchase Class A Common Stockindirect: By The Phanstiel Trust u/a/d 2/5/02 | +185,261 | $3.08 | $571k | 185,261 | Dec 17, 2025 |
| Jun 13, 2025 | BFLY Butterfly Network, Inc. | AGrant or award Class A Common Stock | +80,434 | $0.00 | $0 | 365,505 | Jun 17, 2025 |
| Jun 5, 2025 | MYGN MYRIAD GENETICS INC | AGrant or award Common Stock | +49,796 | $0.00 | $0 | 177,444 | Jun 6, 2025 |
Questions about S. Louise Phanstiel
Answered from the filings on this page, as of the latest one.
Is S. Louise Phanstiel buying or selling?
In the last 12 months S. Louise Phanstiel reported 3 open-market buys worth $2.1M and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $1000k of BFLY on Aug 14, 2026. Grants, option exercises and tax withholding are not counted.
How did S. Louise Phanstiel's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and S. Louise Phanstiel has 2.
Where does S. Louise Phanstiel file Form 4?
S. Louise Phanstiel has filed Form 4 at BFLY (Butterfly Network, Inc.); MYGN (MYRIAD GENETICS INC). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
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.