Mark Elliott Boulding

CIK 1578852 · EXEC. VP AND CLO · last filed 2026-07-08

Mark Elliott Boulding is an EXEC. VP AND CLO who has filed 92 SEC Form 4 insider transactions across 1 company since 2014. The most recent filing, for PTCT, was dated Jul 8, 2026. Across all open-market trades the lifetime net is −$40.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $8.1M 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.

Disclosed Exposure

$8.08M

Companies

1

Total Filings

92

Lifetime Open-Market Net

-$40.00M

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
PTCT	EXEC. VP AND CLO	108,085	$74.79	$8.08M	-$40.00M	55	2026-07-08

Recent Filings

92 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
2026-07-08	PTCT	Mixed	—	-$211.9K	EDGAR
2026-07-06	PTCT	Notice (144)	−5,079	-$427.3K	EDGAR
2026-06-22	PTCT	Mixed	+60	-$333.2K	EDGAR
2026-06-17	PTCT	Notice (144)	−10,522	-$827.6K	EDGAR
2026-05-19	PTCT	Mixed	—	-$130.7K	EDGAR
2026-05-15	PTCT	Notice (144)	−2,812	-$203.7K	EDGAR
2026-05-12	PTCT	Mixed	—	-$114.8K	EDGAR
2026-05-08	PTCT	Notice (144)	−3,540	-$279.6K	EDGAR
2026-04-08	PTCT	Mixed	—	-$68.0K	EDGAR
2026-04-06	PTCT	Notice (144)	−2,265	-$157.3K	EDGAR

Showing 1–10 of 92

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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.