Tappin Matthew

Insider

President, Asset Management

Trades at: STEM

30D 90D 1Y

Net shares · 365d

-11.5K

0 buy · 11.5K sell

Net value · 365d

-$190.2K

$0 in · $190.2K out

Sentiment · 365d

Net selling

0% buying · 100% selling

Open-market trades · 365d

0 buy · 11.5K sell

Trading track record · all companies

Running net of open-market buys − sells across every company. Tap the line or a marker for details. ▲ buy · ▼ sell.

Transactions · 365d

Open-market Buys Sells All types

STEM Sell·S
Mar 11, 26

President, Software Products · 10b5-1

$4.4K

402 sh · $10.83

Own -12%
STEM Sell·S
Mar 10, 26

President, Software Products

$7.3K

655 sh · $11.12

Own -17%
STEM Exercise·M
Mar 7, 26

President, Software Products

$0

1.5K sh

Own +145800%
STEM Exercise·M
Mar 7, 26

President, Software Products

—

1.5K sh

Own +60%
STEM Sell·S
Mar 4, 26

President, Software Products

$4.8K

485 sh · $9.80 avg · 2 lots

Own -17%
STEM Exercise·M
Mar 1, 26

President, Software Products

$0

670 sh

Own New
STEM Exercise·M
Mar 1, 26

President, Software Products

—

670 sh

Own +30%
STEM Grant·A
Feb 26, 26

President, Software Products

$0

43.0K sh · 2 lots

Own New
STEM Sell·S
Feb 20, 26

President, Software Products

$4.2K

366 sh · $11.40

Own -14%
STEM Other·F
Feb 19, 26

President, Software Products

$5.9K

522 sh · $11.30

Own -17%
STEM Exercise·M
Feb 15, 26

President, Software Products

$0

1.3K sh

Own New
STEM Exercise·M
Feb 15, 26

President, Software Products

—

1.3K sh

Own +67%
STEM Sell·S
Nov 11, 25

President, Software Products

$169.6K

9.6K sh · $17.70

Own -84%
STEM Other·F
Nov 10, 25

President, Software Products

$99.0K

5.4K sh · $18.27

Own -32%
STEM Exercise·M
Nov 7, 25

President, Software Products

$0

15.0K sh

Own New
STEM Exercise·M
Nov 7, 25

President, Software Products

—

15.0K sh

Own +801%
STEM Grant·A
Jul 28, 25

PRESIDENT, SOFTWARE DIVISION

$0

20.0K sh · 2 lots

Own New
STEM Grant·A
Jun 30, 25

PRESIDENT, SOFTWARE DIVISION

$0

22.0K sh · 3 lots

Own New

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
Mar 11, 2026	STEM	President, Software Products	Sell S	402	-12%	$10.83	$4.4K
Mar 10, 2026	STEM	President, Software Products	Sell S	655	-17%	$11.12	$7.3K
Mar 7, 2026	STEM	President, Software Products	Exercise M	1.5K	+145800%	—	$0
Mar 7, 2026	STEM	President, Software Products	Exercise M	1.5K	+60%	—	—
Mar 4, 2026	STEM	President, Software Products	Sell S	4852 lots	-17%	$9.80 avg	$4.8K
Mar 1, 2026	STEM	President, Software Products	Exercise M	670	New	—	$0
Mar 1, 2026	STEM	President, Software Products	Exercise M	670	+30%	—	—
Feb 26, 2026	STEM	President, Software Products	Grant A	43.0K2 lots	New	—	$0
Feb 20, 2026	STEM	President, Software Products	Sell S	366	-14%	$11.40	$4.2K
Feb 19, 2026	STEM	President, Software Products	Other F	522	-17%	$11.30	$5.9K
Feb 15, 2026	STEM	President, Software Products	Exercise M	1.3K	New	—	$0
Feb 15, 2026	STEM	President, Software Products	Exercise M	1.3K	+67%	—	—
Nov 11, 2025	STEM	President, Software Products	Sell S	9.6K	-84%	$17.70	$169.6K
Nov 10, 2025	STEM	President, Software Products	Other F	5.4K	-32%	$18.27	$99.0K
Nov 7, 2025	STEM	President, Software Products	Exercise M	15.0K	New	—	$0
Nov 7, 2025	STEM	President, Software Products	Exercise M	15.0K	+801%	—	—
Jul 28, 2025	STEM	PRESIDENT, SOFTWARE DIVISION	Grant A	20.0K2 lots	New	—	$0
Jun 30, 2025	STEM	PRESIDENT, SOFTWARE DIVISION	Grant A	22.0K3 lots	New	—	$0

Buy Sell Non-market (grant · exercise · gift)

About Tappin Matthew

This profile aggregates every SEC Form 4 insider transaction reported by Tappin Matthew across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.