Diamond Hill Investment Group, Inc. - Class A (DHIL)
DHIL moved a median of -0.01% 30 minutes after news, and -0.09% by the close. How DHIL actually reacts to news — the realized, point-in-time move the market made, measured across 209 labeled events over the last three years with zero look-ahead.
DHIL’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 26% | 110 |
| 30-min | -0.01% | 38% | 149 |
| 60-min | -0.02% | 42% | 168 |
| to close | -0.09% | 46% | 188 |
| Middle 50% of DHIL reactions | -0.26% to +0.08% |
|---|---|
| Median reaction (30-min) | -0.01% |
| Measured reactions | 209 |
Half of all Diamond Hill Investment Group, Inc. - Class A news events land between -0.26% and +0.08% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when DHIL moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to DHIL's baseline. Nothing else.
Recent DHIL events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Form 15-12G DIAMOND HILL INVESTMENT | SEC filing · Form 15-12G | SEC EDGAR | — | — | |
| First Eagle Investments Completes Acquisition of Diamond Hill Investment Group | Press release | Business Wire | — | — | |
| Form 8-K DIAMOND HILL INVESTMENT For: Apr 22 | SEC filing · Form 8-K | SEC EDGAR | — | — | |
| Form S-8 POS DIAMOND HILL INVESTMENT | SEC filing · Form S-8 | SEC EDGAR | — | — | |
| Form 8-K DIAMOND HILL INVESTMENT For: Apr 17 | SEC filing · Form 8-K | SEC EDGAR | +0.03% | +0.03% | |
| Form DEF 14A DIAMOND HILL INVESTMENT For: Apr 13 | SEC filing · Form DEF | SEC EDGAR | +0.00% | +0.02% | |
| Form DEFA14A DIAMOND HILL INVESTMENT | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | +0.02% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Apr 02 | SEC filing · Form 8-K | SEC EDGAR | — | -0.60% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Mar 04 | SEC filing · Form 8-K | SEC EDGAR | +0.05% | +0.26% | |
| Diamond Hill Announces Shareholder Approval of First Eagle Transaction | Press release | Business Wire | +0.08% | +0.03% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Mar 03 | SEC filing · Form 8-K | SEC EDGAR | +0.08% | +0.03% | |
| DIAMOND HILL INVESTMENT GROUP, INC. REPORTS 2025 FINANCIAL RESULTS | Press release | PR Newswire | -0.04% | +0.27% | |
| Form 10-K DIAMOND HILL INVESTMENT For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | -0.04% | +0.27% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | -0.04% | +0.27% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Feb 20 | SEC filing · Form 8-K | SEC EDGAR | -0.11% | -0.25% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Feb 24 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -0.04% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Feb 10 | SEC filing · Form 8-K | SEC EDGAR | -0.16% | -0.29% | |
| Form DEFA14A DIAMOND HILL INVESTMENT | SEC filing · Form DEFA14A | SEC EDGAR | -0.16% | -0.29% | |
| Halper Sadeh LLC is Investigating Whether NWE, DHIL, RAPT are Obtaining Fair Prices for its Shareholders | Press release | PR Newswire | +0.00% | +0.00% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Feb 03 | SEC filing · Form 8-K | SEC EDGAR | +0.07% | +0.02% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Jan 28 | SEC filing · Form 8-K | SEC EDGAR | — | +0.39% | |
| Form DEFA14A DIAMOND HILL INVESTMENT | SEC filing · Form DEFA14A | SEC EDGAR | — | +0.39% | |
| Form DEFM14A DIAMOND HILL INVESTMENT | SEC filing · Form DEFM14A | SEC EDGAR | — | +0.39% | |
| Halper Sadeh LLC Encourages DHIL, UDMY, DXLG Shareholders to Contact the Firm to Discuss Their Rights | Press release | PR Newswire | — | -0.04% | |
| Form PREM14A DIAMOND HILL INVESTMENT For: Jan 16 | SEC filing · Form PREM14A | SEC EDGAR | +0.00% | -0.02% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Jan 05 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.12% | |
| BRODSKY & SMITH SHAREHOLDER UPDATE: Notifying Investors of the Following Investigations: Diamond Hill Investment Group, Inc. (Nasdaq – DHIL), Synchronoss Technologies (Nasdaq – SNCR), Forge Global Holdings, Inc. (NYSE – FRGE), Hologic, Inc. (Nasdaq – HOLX | Press release | GlobeNewswire | +0.03% | +0.12% | |
| Halper Sadeh LLC Encourages KPLT, FOLD, DHIL Shareholders to Contact the Firm to Discuss Their Rights | Press release | PR Newswire | +0.00% | -0.30% | |
| Form DEFA14A DIAMOND HILL INVESTMENT | SEC filing · Form DEFA14A | SEC EDGAR | +0.00% | -0.79% | |
| ALERT: Rowley Law PLLC is Investigating Proposed Acquisition of Diamond Hill Investment Group, Inc. | Press release | PR Newswire | +0.11% | -0.42% | |
| BRODSKY & SMITH SHAREHOLDER UPDATE: Notifying Investors of the Following Investigations: Diamond Hill Investment Group, Inc. (Nasdaq – DHIL), Synchronoss Technologies (Nasdaq – SNCR), Forge Global Holdings, Inc. (NYSE - FRGE), Hologic, Inc. (Nasdaq – HOLX | Press release | GlobeNewswire | +0.00% | -0.29% | |
| DHIL Stock Alert: Halper Sadeh LLC is Investigating Whether the Sale of Diamond Hill Investment Group, Inc. is Fair to Shareholders | Press release | Business Wire | +0.14% | -0.12% | |
| Diamond Hill to Be Acquired by First Eagle Investments | Press release | Business Wire | +0.77% | +0.02% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Dec 10 | SEC filing · Form 8-K | SEC EDGAR | +0.77% | +0.02% | |
| Form DEFA14A DIAMOND HILL INVESTMENT | SEC filing · Form DEFA14A | SEC EDGAR | +0.77% | +0.02% | |
| Halper Sadeh LLC Encourages DHIL, SNCR, FRGE, HOLX Shareholders to Contact the Firm to Discuss Their Rights | Press release | PR Newswire | +0.00% | -0.29% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Dec 02 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.85% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Nov 04 | SEC filing · Form 8-K | SEC EDGAR | — | +2.05% | |
| DIAMOND HILL INVESTMENT GROUP, INC. REPORTS RESULTS FOR THIRD QUARTER 2025 AND DECLARES QUARTERLY AND SPECIAL DIVIDEND | Press release | PR Newswire | -0.39% | -3.08% | |
| Form 10-Q DIAMOND HILL INVESTMENT For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.39% | -3.08% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Oct 30 | SEC filing · Form 8-K | SEC EDGAR | -0.39% | -3.08% | |
| Diamond Hill Appoints Diane Nordin to Its Board of Directors | Press release | PR Newswire | -0.39% | -3.08% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Oct 02 | SEC filing · Form 8-K | SEC EDGAR | +0.41% | +1.14% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Sep 19 | SEC filing · Form 8-K | SEC EDGAR | — | -1.68% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Sep 03 | SEC filing · Form 8-K | SEC EDGAR | -1.07% | +1.32% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Aug 04 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.84% | |
| DIAMOND HILL INVESTMENT GROUP, INC. REPORTS RESULTS FOR SECOND QUARTER 2025 AND DECLARES QUARTERLY DIVIDEND | Press release | PR Newswire | +0.00% | -4.60% | |
| Form 10-Q DIAMOND HILL INVESTMENT For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | -4.60% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Jul 29 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -4.60% | |
| Form 8-K DIAMOND HILL INVESTMENT For: Jul 02 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | +0.15% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the DHIL section they belong to.
Where else DHIL is measured.
DHIL earnings → · Analyst actions → · SEC filings →
Other Financial Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| Bank OZK (OZK) | 210 | -0.07% | 45% |
| BLACKROCK MUNI INCOME INVEST (BBF) | 209 | 0.00% | 47% |
| Bank of N.T. Butterfield & Son Limited (The) Voting Ordinary Shares (NTB) | 208 | +0.04% | 58% |
| Southern First Bancshares, Inc. (SFST) | 208 | -0.02% | 40% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Financial Services names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Diamond Hill Investment Group, Inc. - Class A's median reaction calculated?
Every labeled DHIL news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 209 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 38% of DHIL's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does DHIL's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.