Yorktown X Associates LLC
CIK 1687161 · View on SEC EDGAR ↗
Insider
Activist
First SEC filing: Dec. 31, 2018 · Latest: Aug. 11, 2025
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 15 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
15 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| March 14, 2019 | SEI | S | 1,000,000 | $15.65 | $15,650,000 | 0 Indirect | -100.00% | Disposed | 253.7% (price as of 2026-08-21) |
| March 12, 2019 | SEI | S | 1,000,000 | $15.50 | $15,500,000 | 0 Indirect | -100.00% | Disposed | 257.2% (price as of 2026-08-21) |
| Jan. 11, 2018 | SEI | S | 1,408,388 | $21.65 | $30,491,600 | 0 Indirect | -100.00% | Disposed | 155.7% (price as of 2026-08-21) |
| Nov. 15, 2017 | SEI | S | 553,112 | $15.04 | $8,318,804 | 0 Indirect | -100.00% | Disposed | 268.1% (price as of 2026-08-21) |
| Nov. 14, 2017 | SEI | S | 2,107,089 | $15.04 | $31,690,619 | 0 Indirect | -100.00% | Disposed | 268.1% (price as of 2026-08-21) |
| Feb. 8, 2017 | METCZ | S | 56,810 | $13.50 | $766,935 | 3,692,881 Indirect | -1.52% | Disposed | 87.6% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| March 14, 2019 | SEI | Solaris Oilfield Infrastructure, LLC Units | Class A Common Stock (1,000,000) | — | — | 1,000,000 | Disposed |
| March 12, 2019 | SEI | Solaris Oilfield Infrastructure, LLC Units | Class A Common Stock (1,000,000) | — | — | 1,000,000 | Disposed |
| Jan. 11, 2018 | SEI | Solaris Oilfield Infrastructure, LLC Units | Class A Common Stock (1,408,388) | — | — | 1,408,388 | Disposed |
| Nov. 14, 2017 | SEI | Solaris Oilfield Infrastructure, LLC Units | Class A Common Stock (553,112) | — | — | 553,112 | Disposed |
| Nov. 13, 2017 | SEI | Solaris Oilfield Infrastructure, LLC Units | Class A Common Stock (2,107,089) | — | — | 2,107,089 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 6 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Dec. 31, 2018 | KRP | Common Units | 925,634 | Indirect |
| Dec. 31, 2018 | KRP | Kimbell Royalty Operating, LLC Common Units→ Common units representing limited partner interests | — | Indirect |
| Dec. 31, 2018 | KRP | Class B Units→ Common units representing limited partner interests | — | Indirect |
| May 19, 2017 | SEI | Class B Common Stock [F1] | 15,022,824 | Indirect |
| May 19, 2017 | SEI | Solaris Oilfield Infrastructure, LLC Units→ Class A Common Stock (15,022,824) | 15,022,824 | Indirect |
| Feb. 10, 2017 | METCZ | Common Stock, $0.01 par value | 3,749,691 | Indirect |