Tang Capital Management LLC Insider Trades

Entity

10% owner at Boundless Bio, Inc. and 1 other company. 5 significant open-market trades reported on SEC Form 4 in the last 180 days.

On EDGAR, this filer has 194 Form 4 filings on record since 2003, the latest on Nov 5, 2026. Full history on sec.gov

$2.0M

Bought

Sold

5 / 0

Buys / Sells

Companies

BOLD10% owner
Boundless Bio, Inc.
3 buys, $557K
FULC10% owner
Fulcrum Therapeutics, Inc.
2 buys, $1.5M

Reported Trades

Open-market transactions only (code P and S), outside any 10b5-1 plan, dated by the day the filing reached EDGAR. Each row links to the filing.

Filed	Company	Trade	Value	Shares	Source
Oct 26, 2026	BOLD10% owner	buy	$52K	21,640	Form 4
Oct 20, 2026	BOLD10% owner	buy	$350K	149,474	Form 4
Jul 20, 2026	FULC10% owner	buy	$595K	167,616	Form 4
Jul 16, 2026	BOLD10% owner	buy	$156K	63,969	Form 4
Jul 15, 2026	FULC10% owner	buy	$891K	249,946	Form 4

Other Insiders at These Companies

Everyone else who reported a significant open-market trade at the same companies in the last 180 days. Several insiders buying at once is cluster buying.

Kevin Tang10% owner at BOLD3 buys, $557KOct 26, 2026

How to Read This Page

These are the trades an insider chose to make with their own money, not grants, option exercises or tax withholding. A purchase is the stronger signal (why buys carry more information than sales), and an insider who buys is locked out of selling for six months by the short-swing rule. The window here is 180 days; the full filing history lives on EDGAR.

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