SEIC · Sei Investments Co · Insider Trading
Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.
Insider Sentiment Score
Peer-relative 0–100 rank of how aggressively insiders accumulated over the trailing 90 days. See the full ranking.
| Date | Insider | Role | Type | Security | Shares |
|---|---|---|---|---|---|
| 2026-09-30 | WEST ALFRED P JR |
Insider |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $102.96 to $103.89. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
5,483 |
| 2026-09-29 | WEST ALFRED P JR |
Insider |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $103.17 to $103.67. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
28,394 |
| 2026-09-22 | LANE MICHAEL |
Executive Vice President |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $102.76 to $102.79. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
2,400 |
| 2026-09-03 | Hicke Ryan |
Director, CHIEF EXECUTIVE OFFICER |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $110.35 to $110.91. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
37,500 |
| 2026-09-03 | Hicke Ryan |
Director, CHIEF EXECUTIVE OFFICER |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
20,000 |
| 2026-09-03 | Hicke Ryan |
Director, CHIEF EXECUTIVE OFFICER |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
17,500 |
| 2026-09-03 | Hicke Ryan |
Director, CHIEF EXECUTIVE OFFICER |
Convert↑
|
Common Stock
|
20,000 |
| 2026-09-03 | Hicke Ryan |
Director, CHIEF EXECUTIVE OFFICER |
Convert↑
|
Common Stock
|
17,500 |
| 2026-09-01 | ROMEO CARMEN |
Director |
Convert↑
|
Common Stock
|
5,000 |
| 2026-09-01 | ROMEO CARMEN |
Director |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as compensation for service on the Company's Board of Directors. |
Option to Purchase Common Stock
|
5,000 |
| 2026-09-01 | ROMEO CARMEN |
Director |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $109.68 to $109.70. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
5,000 |
| 2026-08-28 | Peterson Michael |
EXECUTIVE VICE PRESIDENT |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $111.19 to $112.07. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
37,500 |
| 2026-08-28 | Peterson Michael |
EXECUTIVE VICE PRESIDENT |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
37,500 |
| 2026-08-28 | Peterson Michael |
EXECUTIVE VICE PRESIDENT |
Convert↑
|
Common Stock
|
37,500 |
| 2026-08-05 | McCabe Philip |
See Remarks |
Convert↑
|
Common Stock
|
5,043 |
| 2026-08-05 | McCabe Philip |
See Remarks |
Sell↓
|
Common Stock
|
5,043 |
| 2026-08-05 | McCabe Philip |
See Remarks |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
5,043 |
| 2026-08-04 | McCabe Philip |
See Remarks |
Convert↑
|
Common Stock
|
9,957 |
| 2026-08-04 | McCabe Philip |
See Remarks |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $104.80 to $105.19. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
24,957 |
| 2026-08-04 | McCabe Philip |
See Remarks |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
9,957 |
| 2026-08-04 | McCabe Philip |
See Remarks |
Convert↑
|
Common Stock
|
15,000 |
| 2026-08-04 | McCabe Philip |
See Remarks |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
15,000 |
| 2026-08-03 | MCCARTHY KATHRYN |
Director |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as compensation for service on the Company's Board of Directors. |
Option to Purchase Common Stock
|
5,000 |
| 2026-08-03 | MCCARTHY KATHRYN |
Director |
Convert↑
|
Common Stock
|
5,000 |
| 2026-08-03 | MCCARTHY KATHRYN |
Director |
Convert↑
|
Common Stock
|
5,000 |
| 2026-08-03 | MCCARTHY KATHRYN |
Director |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as compensation for service on the Company's Board of Directors. |
Option to Purchase Common Stock
|
5,000 |
| 2026-08-03 | MCCARTHY KATHRYN |
Director |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $103.09 to $103.87. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
10,000 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↑
|
Common Stock
|
5,000 |
| 2026-07-28 | GUARINO CARL |
Director |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $102.95 to $103.39. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
10,000 |
| 2026-07-28 | Peterson Michael |
EXECUTIVE VICE PRESIDENT |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $102.00 to $102.14. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
25,000 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
5,000 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $102.60 to $103.23. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
7,400 |
| 2026-07-28 | GUARINO CARL |
Director |
Convert↑
|
Common Stock
|
5,000 |
| 2026-07-28 | Peterson Michael |
EXECUTIVE VICE PRESIDENT |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
25,000 |
| 2026-07-28 | Peterson Michael |
EXECUTIVE VICE PRESIDENT |
Convert↑
|
Common Stock
|
25,000 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
2,500 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↑
|
Common Stock
|
5,000 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
2,500 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↑
|
Common Stock
|
2,500 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
5,000 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $101.57 to $102.41. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
5,300 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Convert↑
|
Common Stock
|
2,500 |
| 2026-07-28 | GUARINO CARL |
Director |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as compensation for service on the Company's Board of Directors. |
Option to Purchase Common Stock
|
5,000 |
| 2026-07-28 | GUARINO CARL |
Director |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as compensation for service on the Company's Board of Directors. |
Option to Purchase Common Stock
|
5,000 |
| 2026-07-28 | Warner Mark Andrew |
Insider |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $100.45 to $101.37. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
2,300 |
| 2026-07-28 | GUARINO CARL |
Director |
Convert↑
|
Common Stock
|
5,000 |
| 2026-07-24 | Sharma Sanjay |
See Remarks* |
Convert↓
Filing footnotes — Option to Purchase Common Stock (Direct)
Received as employment compensation. |
Option to Purchase Common Stock
|
10,000 |
| 2026-07-24 | Shah Sneha S. |
EVP &Head-New Bus Ventures SEI |
Tax↓
|
Common Stock
|
3,746 |
| 2026-07-24 | Sharma Sanjay |
See Remarks* |
Sell↓
Filing footnotes — Common Stock (Direct)
Represents the weighted average of a range of sale prices from $99.09 to $99.75. The reporting person undertakes to provide to the Staff of the Securities and Exchange Commission, the Company, or any stockholder of the Company, upon request, full information regarding the number of shares sold at each separate price. |
Common Stock
|
20,000 |
| 2026-07-24 | Sharma Sanjay |
See Remarks* |
Convert↑
|
Common Stock
|
10,000 |