Insider · CIK 0001059374
Alfred P West Jr
Files at SEIC (SEI INVESTMENTS CO). First filing Nov 21, 2023, latest Oct 1, 2026.
In brief
Alfred P West Jr files SEC Form 4 as chair, director and 10% owner at SEIC (SEI INVESTMENTS CO). Since Nov 21, 2023, Alfred P West Jr has reported 0 open-market buys worth $0 and 11 open-market sells worth $67M, the latest filed on Oct 1, 2026.
A track record needs three past buys with six months of prices behind them; Alfred P West Jr has 0, so none is measured yet.
The newest scored trade: sold $3.5M of SEIC on Sep 29, 2026, filed Oct 1, 2026, scored 41 (moderate). In the last 12 months: 0 buys worth $0 and 4 sells worth $16M.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
SEIC: SEI INVESTMENTS CO
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 41Moderate | SEI INVESTMENTS CO | $3.5M 33,877 shares | -0% | +38% from low-7% from high | |
| 33Weak | SEICsell SEI INVESTMENTS CO | $5.0M 57,332 shares | -1% | +17% from low-6% from high | |
| 41Moderate | SEI INVESTMENTS CO | $5.0M 62,447 shares | -1% | +22% from low-14% from high | |
| 38Weak | SEI INVESTMENTS CO | $2.0M 24,770 shares | -0% | +23% from low-14% from high | |
| 60Notable | SEI INVESTMENTS CO | $12M 141,126 shares | -2% | +29% from low-1% from high | |
| 45Moderate | SEICsell SEI INVESTMENTS CO | $13M 146,200 shares | -2% | - | |
| 38Weak | SEI INVESTMENTS CO | $2.1M 24,994 shares | -0% | - | |
| 60Notable | SEI INVESTMENTS CO | $11M 137,099 shares | -2% | - | |
| 45Moderate | SEI INVESTMENTS CO | $2.0M 34,043 shares | -0% | +13% from low-7% from high | |
| 60Notable | SEI INVESTMENTS CO | $1.1M 18,559 shares | -0% | +9% from low-10% from high | |
| 60Notable | SEI INVESTMENTS CO | $11M 188,583 shares | -2% | +10% from low-10% from high |
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 29, 2026 | SEIC SEI Investments Company | 35,000 0.03% of outstanding | $3.7M | Sep 29, 2026 | $5.0M |
| Jun 26, 2026 | SEIC SEI Investments Company | 59,000 0.05% of outstanding | $5.2M | Jun 26, 2026 | none |
| Mar 10, 2026 | SEIC SEI Investments Co | 67,000 0.05% of outstanding | $5.4M | Mar 10, 2026 | none |
| Dec 3, 2025 | SEIC SEI INVESTMENTS CO | 24,770 0.02% of outstanding | $2.0M | Dec 3, 2025 | none |
| May 28, 2025 | SEIC SEI Investments Company | 151,000 0.12% of outstanding | $13M | May 28, 2025 | $12M |
| Mar 3, 2025 | SEIC SEI Investments Co | 160,000 0.13% of outstanding | $13M | Mar 3, 2025 | $13M |
| Dec 13, 2024 | SEIC SEI Investments Co | 150,000 0.12% of outstanding | $13M | Dec 13, 2024 | $16M |
| Dec 6, 2024 | SEIC SEI INVESTMENTS CO | 5,984 0.00% of outstanding | $504k | Dec 6, 2024 | $13M |
| Dec 4, 2024 | SEIC SEI INVESTMENTS CO | 19,010 0.01% of outstanding | $1.6M | Dec 4, 2024 | $11M |
| Nov 7, 2024 | SEIC SEI Investments Co | 155,000 0.12% of outstanding | $12M | Nov 7, 2024 | $12M |
| Mar 26, 2024 | SEIC SEI Investments Co | 180,000 0.14% of outstanding | $13M | Mar 26, 2024 | none |
| Dec 4, 2023 | SEIC SEI INVESTMENTS COMPANY | 4,700 0.00% of outstanding | $282k | Dec 4, 2023 | $22M |
| Dec 1, 2023 | SEIC SEI INVESTMENTS COMPANY | 29,343 0.02% of outstanding | $1.8M | Dec 1, 2023 | $20M |
| Nov 17, 2023 | SEIC SEI Investments Company | 215,000 0.16% of outstanding | $13M | Nov 17, 2023 | $8.0M |
Transactions
Every row this insider has filed, 49 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 29, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -28,394 | $103.40 | $2.9M | 6,790,057 | 12 d ago |
| Sep 30, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -5,483 | $103.16 | $566k | 6,784,574 | 12 d ago |
| Jun 26, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -46,162 | $87.21 | $4.0M | 6,829,621 | Jun 29, 2026 |
| Jun 26, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -3,838 | $87.67 | $336k | 6,825,783 | Jun 29, 2026 |
| Jun 29, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -5,652 | $87.18 | $493k | 6,820,131 | Jun 29, 2026 |
| Jun 29, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -1,680 | $88.09 | $148k | 6,818,451 | Jun 29, 2026 |
| Mar 10, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -178 | $78.88 | $14k | 6,938,052 | Mar 12, 2026 |
| Mar 10, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -25,391 | $79.97 | $2.0M | 6,912,661 | Mar 12, 2026 |
| Mar 10, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -29,431 | $80.47 | $2.4M | 6,883,230 | Mar 12, 2026 |
| Mar 11, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -6,076 | $79.11 | $481k | 6,877,154 | Mar 12, 2026 |
| Mar 11, 2026 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -1,371 | $79.94 | $110k | 6,875,783 | Mar 12, 2026 |
| Jan 1, 2026 | SEIC SEI INVESTMENTS CO | FTax withholding Common Stock | -3,482 | $82.02 | $286k | 6,938,230 | Jan 2, 2026 |
| Dec 5, 2025 | SEIC SEI INVESTMENTS CO | FTax withholding Common Stock | -1,100 | $81.25 | $89k | 6,941,712 | Dec 29, 2025 |
| Dec 3, 2025 | SEIC SEI INVESTMENTS CO | MOption exercise Common Stock | +30,000 | $53.34 | $1.6M | 6,967,582 | Dec 5, 2025 |
| Dec 3, 2025 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -24,770 | $80.87 | $2.0M | 6,942,812 | Dec 5, 2025 |
| Dec 3, 2025 | SEIC SEI INVESTMENTS CO | MOption exercise STOCK OPTION (RIGHT TO PURCHASE)derivative | -30,000 | - | - | 0 | Dec 5, 2025 |
| May 28, 2025 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -75,000 | $85.78 | $6.4M | 7,003,708 | May 30, 2025 |
| May 29, 2025 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -64,498 | $84.26 | $5.4M | 6,939,210 | May 30, 2025 |
| May 29, 2025 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -1,628 | $85.21 | $139k | 6,937,582 | May 30, 2025 |
| Dec 13, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -80,955 | $85.64 | $6.9M | 7,298,167 | Dec 17, 2024 |
| Dec 13, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -12,703 | $86.22 | $1.1M | 7,285,464 | Dec 17, 2024 |
| Dec 13, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -500 | $87.25 | $44k | 7,284,964 | Dec 17, 2024 |
| Dec 16, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -13,632 | $84.72 | $1.2M | 7,271,332 | Dec 17, 2024 |
| Dec 16, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -34,672 | $85.34 | $3.0M | 7,236,660 | Dec 17, 2024 |
| Dec 16, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -3,738 | $86.09 | $322k | 7,232,922 | Dec 17, 2024 |
| Dec 12, 2024 | SEIC SEI INVESTMENTS CO | AGrant or award Common Stock | +7,600 | - | - | 7,379,122 | Dec 16, 2024 |
| Dec 4, 2024 | SEIC SEI INVESTMENTS CO | MOption exercise Common Stock | +35,000 | $40.64 | $1.4M | 7,396,516 | Dec 6, 2024 |
| Dec 4, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -19,010 | $82.49 | $1.6M | 7,377,506 | Dec 6, 2024 |
| Dec 6, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -5,984 | $84.23 | $504k | 7,371,522 | Dec 6, 2024 |
| Dec 4, 2024 | SEIC SEI INVESTMENTS CO | MOption exercise Option to Purchase Common Stockderivative | -35,000 | - | - | 0 | Dec 6, 2024 |
| Nov 7, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -30,000 | $80.24 | $2.4M | 7,468,615 | Nov 12, 2024 |
| Nov 8, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -100,000 | $80.26 | $8.0M | 7,368,615 | Nov 12, 2024 |
| Nov 11, 2024 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -7,099 | $80.81 | $574k | 7,361,516 | Nov 12, 2024 |
| Dec 15, 2023 | SEIC SEI INVESTMENTS CO | AGrant or award Common Stock | +4,000 | - | - | 8,034,834 | Dec 19, 2023 |
| Dec 15, 2023 | SEIC SEI INVESTMENTS CO | AGrant or award Option to Purchase Common Stockderivative | +12,500 | - | - | 12,500 | Dec 19, 2023 |
| Dec 15, 2023 | SEIC SEI INVESTMENTS CO | AGrant or award Option to Purchase Common Stockderivative | +12,500 | - | - | 12,500 | Dec 19, 2023 |
| Dec 1, 2023 | SEIC SEI INVESTMENTS CO | MOption exercise Common Stock | +22,500 | $33.76 | $760k | 8,042,377 | Dec 4, 2023 |
| Dec 1, 2023 | SEIC SEI INVESTMENTS CO | MOption exercise Common Stock | +16,281 | $33.76 | $550k | 8,058,658 | Dec 4, 2023 |
| Dec 1, 2023 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -29,343 | $59.78 | $1.8M | 8,029,315 | Dec 4, 2023 |
| Dec 4, 2023 | SEIC SEI INVESTMENTS CO | MOption exercise Common Stock | +6,219 | $33.76 | $210k | 8,035,534 | Dec 4, 2023 |
| Dec 4, 2023 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -4,500 | $59.96 | $270k | 8,031,034 | Dec 4, 2023 |
| Dec 4, 2023 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -200 | $60.17 | $12k | 8,030,834 | Dec 4, 2023 |
| Dec 1, 2023 | SEIC SEI INVESTMENTS CO | MOption exercise Stock Option (Right to Purchase)derivative | -22,500 | - | - | 0 | Dec 4, 2023 |
| Dec 1, 2023 | SEIC SEI INVESTMENTS CO | MOption exercise Stock Option (Right to Purchase)derivative | -16,281 | - | - | 6,219 | Dec 4, 2023 |
| Dec 4, 2023 | SEIC SEI INVESTMENTS CO | MOption exercise Stock Option (Right to Purchase)derivative | -6,219 | - | - | 0 | Dec 4, 2023 |
| Nov 22, 2023 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -18,559 | $57.91 | $1.1M | 8,019,877 | Nov 22, 2023 |
| Nov 17, 2023 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -48,159 | $58.00 | $2.8M | 8,178,860 | Nov 21, 2023 |
| Nov 20, 2023 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -49,946 | $58.24 | $2.9M | 8,128,914 | Nov 21, 2023 |
| Nov 21, 2023 | SEIC SEI INVESTMENTS CO | SOpen-market sale Common Stock | -90,478 | $57.85 | $5.2M | 8,038,436 | Nov 21, 2023 |
Questions about Alfred P West Jr
Answered from the filings on this page, as of the latest one.
Is Alfred P West Jr buying or selling?
In the last 12 months Alfred P West Jr reported 0 open-market buys worth $0 and 4 open-market sells worth $16M on SEC Form 4; the latest was sold $3.5M of SEIC on Sep 29, 2026. Grants, option exercises and tax withholding are not counted.
How did Alfred P West Jr's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Alfred P West Jr has 0.
Where does Alfred P West Jr file Form 4?
Alfred P West Jr has filed Form 4 at SEIC (SEI INVESTMENTS CO) as Executive Chairman. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.