DIAMOND HILL INVESTMENT GROUP INC (DHIL) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2026-04-22

DIAMOND HILL INVESTMENT GROUP INC (DHIL) has filed 10 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-04-22. 2 Form 8-K material event filings were reported by DHIL in the last 90 days. InsiderAlpha tracks every DHIL SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About DIAMOND HILL INVESTMENT GROUP INC (DHIL)

SIC classification	Investment Advice (SIC 6282)
SEC CIK	0000909108

90-Day SEC Filing Activity

Form 4 filings (90d)	10
Form 8-K filings (90d)	2
Latest Form 4 filing	2026-04-22

Recent DHIL Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2026-04-22	BRILLIANT HEATHER E	Chief Executive Officer	D — Derivative transaction	473	$175.00	$83K	SEC
2026-04-22	Hawley Austin	Director	D — Derivative transaction	77.5K	$175.00	$13.56M	SEC
2026-04-22	Thomas L'Quentus	Director	D — Derivative transaction	2.6K	$175.00	$458K	SEC
2026-04-22	BRILLIANT HEATHER E	Chief Executive Officer	D — Derivative transaction	66.7K	$175.00	$11.67M	SEC
2026-04-22	Quinif Jo Ann	President of DHCM	D — Derivative transaction	45.1K	$175.00	$7.89M	SEC
2026-04-22	Quinif Jo Ann	President of DHCM	D — Derivative transaction	816	$175.00	$143K	SEC
2026-04-22	Line Thomas Edward	Chief Financial Officer	D — Derivative transaction	1.3K	$175.00	$226K	SEC
2026-04-22	St. Pierre Nicole Renee	Director	D — Derivative transaction	5.1K	$175.00	$895K	SEC
2026-04-22	Cooley Richard Scott	Director	D — Derivative transaction	13.8K	$175.00	$2.42M	SEC
2026-04-22	Meyer Paula R	Director	D — Derivative transaction	3.8K	$175.00	$659K	SEC
2026-04-22	Fowler Gordon B	Director	D — Derivative transaction	7.7K	$175.00	$1.35M	SEC
2026-04-22	Line Thomas Edward	Chief Financial Officer	D — Derivative transaction	13.4K	$175.00	$2.35M	SEC
2026-04-01	BRILLIANT HEATHER E	Chief Executive Officer	F — Tax withholding / forfeiture	2.8K	$172.10	$483K	SEC
2026-04-01	Hawley Austin	Insider	F — Tax withholding / forfeiture	1.2K	$172.10	$203K	SEC
2026-04-01	Line Thomas Edward	Chief Financial Officer	F — Tax withholding / forfeiture	664	$172.10	$114K	SEC

All transactions sourced from SEC EDGAR Form 4 filings for DIAMOND HILL INVESTMENT GROUP INC (DHIL). Updated in real time as new filings are submitted to the SEC.

Most-Active DHIL Insiders — Last 90 Days

Insider	Form 4 filings	Total transaction value
BRILLIANT HEATHER E	2	$11.75M
Line Thomas Edward	2	$2.58M
Quinif Jo Ann	2	$8.04M
Thomas L'Quentus	1	$458K
Cooley Richard Scott	1	$2.42M

Recent DHIL Form 8-K Material Events

2026-04-22 — Item 1.02, 2.01, 3.01, 3.03, 5.01, 5.02, 5.03, 8.01, 9.01 · Acquisition · neutral [SEC]
Diamond Hill Investment Group completed its merger with First Eagle Investment Management on April 22, 2026, with shareholders receiving $175.00 per share in cash. The merger was previously announced on December 10, 2025, and has now closed, making Diamond Hill a wholly owned sub
2026-04-17 — Item 7.01, 9.01 · Acquisition · neutral [SEC]
Diamond Hill Investment Group announced that all conditions for its previously announced merger with First Eagle Investment Management have been satisfied, with closing scheduled for April 22, 2026. The company obtained requisite client consent (78%+ by revenue), received all reg
2026-04-02 — Item 8.01 · Other · neutral [SEC]
Diamond Hill Investment Group reported its assets under management (AUM) as of March 31, 2026, totaling $25.911 billion across various investment vehicles and strategies. This is a routine quarterly AUM disclosure with no material changes, acquisitions, or strategic announcements
2026-03-04 — Item 8.01 · Other · neutral [SEC]
Diamond Hill Investment Group reported its assets under management (AUM) as of February 28, 2026, totaling $28.072 billion across proprietary funds, separately managed accounts, collective investment trusts, and other pooled vehicles. The filing provides a breakdown by investment
2026-03-03 — Item 5.07, 8.01, 9.01 · Acquisition · neutral [SEC]
Diamond Hill Investment Group shareholders voted on March 3, 2026 to approve a merger with First Eagle Investment Management LLC. The merger agreement was signed on December 10, 2025, and upon closing, Diamond Hill will become a wholly-owned subsidiary of First Eagle, with its sh

Recent Insider Filings

2026-04-22 — Cooley Richard Scott (Director)
2026-04-22 — Fowler Gordon B (Director)
2026-04-22 — Hawley Austin (Director)
2026-04-22 — Line Thomas Edward (Chief Financial Officer)
2026-04-22 — Meyer Paula R (Director)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in DHIL insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

DHIL Insider Trading — FAQ

What is the latest insider trade for DHIL?: DIAMOND HILL INVESTMENT GROUP INC (DHIL) had 10 insider filings in the last 90 days, with the most recent on 2026-04-22. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying DHIL stock?: 0 insider purchases of DHIL were filed in the last 90 days.
How many insiders are selling DHIL stock?: 0 insider sales of DHIL were filed in the last 90 days.
Where can I see DHIL SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every DHIL SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Related Companies — Recent Insider Activity

Learn More

Open the live DHIL dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.