StockCIK 356037

CSP INC /MA/ (CSPI): Insider Trades and Fund Holdings

In the past 12 months, CSP INC /MA/ insiders reported 3 open-market purchases worth $36K and 0 sales worth $0.

3Insider buys, 12 months

$36KBought by insiders, 12 months

$0Sold by insiders, 12 months

1Tracked funds holding

Recent insider trades

Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 15, 2026.

Recent CSPI insider trades
Filed	Traded	Insider	Role	Type	Shares	Price ($)	Value	Holding	Filing
Sep 15	Sep 11	Joseph R. Nerges10% owner	10% owner	▲ BUY	3,600	7.82	$28K	+0.3%	Form 4 ↗
Sep 15	Sep 15	Joseph R. Nerges10% owner	10% owner	▲ BUY	500	7.96	$4K	+0.0%	Form 4 ↗
Sep 15	Sep 14	Joseph R. Nerges10% owner	10% owner	▲ BUY	500	7.90	$4K	+0.0%	Form 4 ↗

Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings

Insiders who traded in the past year

Insider	Role	Buys	Bought	Sells	Sold	Latest
Joseph R. Nerges	10% owner	3	$36K	0	$0	Sep 15, 2026

Tracked funds that report CSPI

From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.

Fund	Quarter	Shares	Value	% of portfolio	Change
Renaissance Technologies	Q2 2026	267,714	$2.13M	0.00%	▼ −3.5%

Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings

Reading these numbers

Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →