Home

S. Louise Phanstiel

CIK 1471518 · last filed 2026-06-22

S. Louise Phanstiel is a corporate insider who has filed 40 SEC Form 4 insider transactions across 5 companies since 2009. The most recent filing, for BFLY, was dated Jun 22, 2026. Across all open-market trades the lifetime net is −$460.1K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $6.7M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Loading insider history…
Disclosed Exposure

$6.67M

Companies

5

Total Filings

40

Lifetime Open-Market Net

-$460.1K

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
BFLY Director 576,213 $8.13 $4.69M $0 1 2026-06-22
MYGN Director 374,771 $5.26 $1.97M -$1.15M 22 2026-06-05
Butterfly Network, Inc. (BFLY.WS) Delisted Director 550,766 $0.01 $2.9K $453.4K 7 2025-12-17
Butterfly Network, Inc. (LGVW.WS) Delisted Director 73,206 — — $0 1 2021-02-16
VSTM Director 2,208 $6.08 $13.4K $240.3K 8 2017-06-15

Recent Filings

40 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-06-22 BFLY Grant (A) +25,447 $0 EDGAR
2026-06-05 MYGN Grant (A) +59,701 $0 EDGAR
2026-02-27 MYGN Buy (P) +104,507 $494.7K EDGAR
2025-12-17 Butterfly Network, Inc. (BFLY.WS) Delisted Buy (P) +185,261 $571.2K EDGAR
2025-06-17 Butterfly Network, Inc. (BFLY.WS) Delisted Grant (A) +80,434 $0 EDGAR
2025-06-06 MYGN Grant (A) +49,796 $0 EDGAR
2024-09-13 BFLY Notice (144) −60,049 -$115.9K EDGAR
2024-09-13 Butterfly Network, Inc. (BFLY.WS) Delisted Sell (S) −60,049 -$117.8K EDGAR
2024-06-12 Butterfly Network, Inc. (BFLY.WS) Delisted Grant (A) +157,894 $0 EDGAR
2024-06-07 MYGN Grant (A) +15,695 $0 EDGAR
Showing 1–10 of 40
Page 1 of 4
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.