8-K - SEI INVESTMENTS CO (0000350894) (Filer)
Published . Updated .
8-K - SEI INVESTMENTS filed an 8-K with the SEC on Oct 21 (a notice of a material company event).
Directly affected
- SEIC Sei Investments+2.7%
Named in this report.
Indirectly affected
- SPY SPDR S&P 500+1.6%
The broad U.S. stock market
- TLT iShares 20+ Year Treasury Bond-1.8%
Long-term U.S. government bonds
- QQQ Invesco QQQ+2.3%
Large technology stocks
- GLD SPDR Gold Shares-3.3%
Gold can move with the broad market
Price reaction, T-5 to T+3
| Ticker | T-5 | T-3 | T-1 | T0 | T+1 | T+2 | T+3 |
|---|---|---|---|---|---|---|---|
| SEIC | -2.86% | -3.28% | base | -3.55% | after close | after close | after close |
| SPY | -0.18% | -0.84% | base | -1.18% | after close | after close | after close |
| TLT | -0.31% | -0.97% | base | +1.86% | after close | after close | after close |
| QQQ | +0.41% | -0.96% | base | -2.85% | after close | after close | after close |
| GLD | +0.98% | +0.18% | base | -2.61% | after close | after close | after close |
Closing-price change versus T-1, the last close before the story. T0 to T+3 fill in after each market close. Prices: Alpaca IEX.
Market Call
Think this story will push the stock up or down over the next three trading days? Make a free call and see what other readers think. Points are play money with no cash value.
Filed: 2026-10-21 AccNo: 0000350894-26-000051 Size: 3 MB Item 2.02: Results of Operations and Financial Condition Item 7.01: Regulation FD Disclosure Item 8.01: Other Events Item 9.01: Financial Statements and Exhibits
Source: sec-edgar
The price since 21 Oct 2026: Sei Investments (SEIC) versus the S&P 500
| Company | When | Move | Status |
|---|---|---|---|
| GLD | that day | -2.61% | final price |
| GLD | three days earlier | +0.18% | final price |
| GLD | five days earlier | +0.98% | final price |
| QQQ | that day | -2.85% | final price |
| QQQ | three days earlier | -0.96% | final price |
| QQQ | five days earlier | +0.41% | final price |
| Sei Investments (SEIC) | that day | -3.55% | final price |
| Sei Investments (SEIC) | three days earlier | -3.28% | final price |
| Sei Investments (SEIC) | five days earlier | -2.86% | final price |
| SPY | that day | -1.18% | final price |
| SPY | three days earlier | -0.84% | final price |
| SPY | five days earlier | -0.18% | final price |
| TLT | that day | +1.86% | final price |
| TLT | three days earlier | -0.97% | final price |
| TLT | five days earlier | -0.31% | final price |
Who gains and who loses around Sei Investments (SEIC)
Companies mentioned with this story
- SEIC Sei Investments
For “8-K - SEI INVESTMENTS CO (0000350894) (Filer),” Sei Investments (SEIC) is linked, with no stored direction, high confidence. Reason on file: SEC 8-K filing -> direct issuer disclosure -> SEIC
How “8-K - SEI INVESTMENTS CO (0000350894) (Filer)” reaches Sei Investments (SEIC)
Sei Investments (SEIC) is the company in “8-K - SEI INVESTMENTS CO (0000350894) (Filer),” the 21 Oct 2026 this story story.
For Sei Investments (SEIC), the reason on file says SEC 8-K filing -> direct issuer disclosure -> SEIC
The price range for Sei Investments (SEIC), and the dates in the story
SEIC traded between 102.90 and 108.47 across 9 sessions. The latest close on file is 108.39.
How strong the case is around Sei Investments (SEIC)
30 out of 100
“8-K - SEI INVESTMENTS CO (0000350894) (Filer)” scores 30 out of 100. The score uses 1 sources, a -2.37% difference versus the S&P 500 (SPY), and 1 linked companies.