Diane L. Dewbrey

MBI

DIRECTOR · MBIA INC · CIK 0001200125

FILING MIX · LIFETIME74%/26%

BUYS

SELLS

TOTAL VALUE

$759.3K

COMPANIES

ACTIVE SINCE

May 2020

HOLDINGS NOW

146,198

AVG SELL PX

$7.15

Trades · vs SPY

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Performance · forward returns vs SPY

2 backtested trades · 8 horizons · 2 pendingHow are these numbers computed? →

Forward-return performance of every backtestable P/S trade by Diane L. Dewbrey, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.

HORIZON	TRADES	WIN RATE	INSIDER RETURN	SPY RETURN	MEAN EXCESS	MEDIAN EXCESS	T-STAT
7d	2	+50.00%	+5.61%	+2.24%	+3.36%	+3.36%	—
14d	2	+50.00%	+5.43%	+5.24%	+0.19%	+0.19%	—
30d	2	+50.00%	+3.32%	+6.29%	-2.97%	-2.97%	—
60d	2	+100.00%	-0.50%	+2.38%	-2.87%	-2.87%	—
90d	2	+50.00%	+3.44%	+1.75%	+1.70%	+1.70%	—
180d	2	+100.00%	-4.66%	+1.19%	-5.84%	-5.84%	—
1y	2(1 pending)	+100.00%	+27.22%	-2.61%	+29.82%	+29.82%	—
2y	2(1 pending)	+100.00%	+69.91%	+27.60%	+42.31%	+42.31%	—

How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.

Holdings over time

MBI · 121,198 shares · as of May 12, 2026

Trading cadence · quarterly flow

BUY ● SELL ●

2020

2021

2022

2023

2024

2025

2026

FLOW · 14 buys / 5 sellsCOVERAGE · 25 quarters

Form 4 filings · all activity

COMPANY	TYPE	SHARES	PRICE	VALUE	HELD AFTER	TRADE DATE	FILED	DETAILS
MBI MBIA INC	PURCHASEGRANT Stock grant	16,181	$6.18	$100.0K	121,198	May 12, 2026	May 13, 2026 ↗	View →
MBI MBIA INC	SALE	4,975	$7.15	$35.6K	105,017	Aug 21, 2025	Aug 25, 2025 ↗	View →
MBI MBIA INC	PURCHASEGRANT Stock grant	23,095	$4.33	$100.0K	109,992	May 13, 2025	May 14, 2025 ↗	View →
MBI MBIA INC	PURCHASEGRANT Stock grant	16,502	$6.06	$100.0K	86,897	May 14, 2024	May 16, 2024 ↗	View →
COCH ENVOY MEDICAL, INC.	SALE	25,000	—	—	0	Sep 29, 2023	Oct 3, 2023 ↗	View →
COCH ENVOY MEDICAL, INC.	PURCHASE	25,000	—	—	25,000	Sep 29, 2023	Oct 3, 2023 ↗	View →
MBI MBIA INC	PURCHASEGRANT Stock grant	12,821	$7.80	$100.0K	70,395	May 12, 2023	May 16, 2023 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	PURCHASE	1,192	—	—	3,475	Jun 7, 2022	Jun 9, 2022 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	SALEGRANT Stock grant	1,192	—	—	0	Jun 7, 2022	Jun 9, 2022 ↗	View →
MBI MBIA INC	PURCHASEGRANT Stock grant	8,361	$11.96	$100.0K	57,574	May 12, 2022	May 13, 2022 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	PURCHASE	325	$73.04	$23.7K	2,283	Mar 8, 2022	Mar 8, 2022 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	PURCHASEGRANT Stock grant	1,192	—	—	1,192	Jul 1, 2021	Jul 6, 2021 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	PURCHASE	1,457	—	—	1,958	Jul 1, 2021	Jul 6, 2021 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	SALE	1,457	—	—	0	Jul 1, 2021	Jul 6, 2021 ↗	View →
MBI MBIA INC	PURCHASEGRANT Stock grant	11,261	$8.88	$100.0K	49,213	May 13, 2021	May 17, 2021 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	PURCHASEGRANT Stock grant	1,457	—	—	1,457	Jul 1, 2020	Jul 6, 2020 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	SALE	501	—	—	0	Jul 1, 2020	Jul 6, 2020 ↗	View →
BBSI BARRETT BUSINESS SERVICES INC	PURCHASE	501	—	—	501	Jul 1, 2020	Jul 6, 2020 ↗	View →
MBI MBIA INC	PURCHASEGRANT Stock grant	15,949	$6.27	$100.0K	37,952	May 14, 2020	May 15, 2020 ↗	View →

Other insiders · MBI

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About this filer

CIK 0001200125

ROLE

Director

PRIMARY

MBI

COMPANIES

ACTIVE SINCE

May 2020

MARKETPEEL · /INSIDER/0001200125DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE

Diane L. Dewbrey

The morning brief, before the bell.