Louise S. Phanstiel

Insider

First SEC filing: June 5, 2026 · Latest: June 5, 2026

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

1 buys (P) 0 sells (S) Net: $999,936 + 16 non-open-market transactions below Avg return of open purchases vs now: 6.7% last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

16 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 14, 2026	BFLY	P	115,200	$8.68	$999,936	300,461 Indirect	+62.18%	Acquired	6.7% (price as of 2026-08-21)
June 22, 2026	BFLY	A	25,447	—	—	390,952 Direct	+6.96%	Acquired	(price as of 2026-08-21)
June 4, 2026	MYGN	A	59,701	—	—	341,652	—	—	(price as of 2026-08-21)
June 13, 2025	BFLY	A	80,434	—	—	365,505 Direct	+28.22%	Acquired	(price as of 2026-08-21)
Sept. 13, 2024	BFLY	S	60,049	$1.96	$117,696	0 Indirect	-100.00%	Disposed	372.7% (price as of 2026-08-21)
June 10, 2024	BFLY	A	157,894	—	—	285,071 Direct	+124.15%	Acquired	(price as of 2026-08-21)
June 20, 2023	BFLY	A	65,789	—	—	127,177 Direct	+107.17%	Acquired	(price as of 2026-08-21)
June 17, 2022	BFLY	A	48,231	—	—	61,388 Direct	+366.58%	Acquired	(price as of 2026-08-21)
June 3, 2021	MYGN	A	12,848	—	—	79,527 Direct	+19.27%	Acquired	(price as of 2026-08-21)
Feb. 16, 2021	BFLY	A	13,157	—	—	13,157 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 12, 2021	BFLY	A	60,049	—	—	60,049 Indirect	—	Acquired	(price as of 2026-08-21)
June 13, 2017	VSTM	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-21)
June 14, 2016	VSTM	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-21)
June 12, 2015	VSTM	A	17,969	—	—	17,969 Direct	—	Acquired	(price as of 2026-08-21)
Dec. 29, 2014	VSTM	P	10,000	$8.54	$85,400	26,500 Indirect	+60.61%	Acquired	-93.2% (price as of 2026-08-21)
June 10, 2014	VSTM	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-21)
June 12, 2013	VSTM	P	4,500	$9.60	$43,200	16,500 Indirect	+37.50%	Acquired	-94.0% (price as of 2026-08-21)
June 11, 2013	VSTM	P	8,000	$9.37	$74,960	12,000 Indirect	+200.00%	Acquired	-93.8% (price as of 2026-08-21)
June 10, 2013	VSTM	P	4,000	$9.16	$36,640	4,000 Indirect	—	Acquired	-93.7% (price as of 2026-08-21)
June 4, 2013	VSTM	A	8,870	—	—	8,870 Direct	—	Acquired	(price as of 2026-08-21)
June 4, 2013	VSTM	A	12,500	—	—	12,500 Direct	—	Acquired	(price as of 2026-08-21)
Sept. 18, 2012	VSTM	A	25,000	—	—	25,000 Direct	—	Acquired	(price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
June 13, 2017	VSTM	Stock Option (Right to Buy)	Common Stock (25,000)	$2.09	June 13, 2027	25,000	Acquired
June 14, 2016	VSTM	Stock Option (Right to Buy)	Common Stock (25,000)	$1.37	June 14, 2026	25,000	Acquired
June 12, 2015	VSTM	Stock Option (Right to Buy)	Common Stock (17,969)	$7.99	June 12, 2025	17,969	Acquired
June 10, 2014	VSTM	Stock Option (Right to Buy)	Common Stock (25,000)	$10.07	June 10, 2024	25,000	Acquired
June 4, 2013	VSTM	Stock Option (Right to Buy)	Common Stock (8,870)	$9.34	June 4, 2023	8,870	Acquired
June 4, 2013	VSTM	Stock Option (Right to Buy)	Common Stock (12,500)	$9.34	June 4, 2023	12,500	Acquired
Sept. 18, 2012	VSTM	Stock Option (Right to Buy)	Common Stock (25,000)	$9.68	Sept. 18, 2022	25,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Sept. 16, 2009	MYGN	Common Stock	1,000	Direct