Yorktown Energy Partners X, L.P.

CIK 1577919 · View on SEC EDGAR ↗

Insider Activist

First SEC filing: Dec. 18, 2019 · Latest: Nov. 25, 2025

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Institution

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Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 28 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

28 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Dec. 16, 2024 SEI S 975,000 $24.01 $23,409,750 0 Direct -100.00% Disposed 130.6% (price as of 2026-08-21)
March 10, 2021 SEI S 400,000 $12.75 $5,100,000 0 Direct -100.00% Disposed 334.2% (price as of 2026-08-21)
Feb. 25, 2021 SEI S 500,000 $11.00 $5,500,000 0 Direct -100.00% Disposed 403.3% (price as of 2026-08-21)
Dec. 16, 2019 1577919 S 802,324 $17.38 $13,944,391 0 Direct -100.00% Disposed
March 14, 2019 SEI S 1,000,000 $15.65 $15,650,000 0 Direct -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 Direct -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 Direct -100.00% Disposed 155.7% (price as of 2026-08-21)
Nov. 15, 2017 SEI S 553,112 $15.04 $8,318,804 0 Direct -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 Direct -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 Direct -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
Dec. 16, 2024 SEI Solaris Energy Infrastructure, LLC Units Class A Common Stock (975,000) — — 975,000 Disposed
March 10, 2021 SEI Solaris Oilfield Infrastructure, LLC Units Class A Common Stock (400,000) — — 400,000 Disposed
Feb. 25, 2021 SEI Solaris Oilfield Infrastructure, LLC Units Class A Common Stock (500,000) — — 500,000 Disposed
Dec. 16, 2019 1577919 Brigham Minerals Holdings, LLC Units Class A Common Stock (802,324) — — 802,324 Disposed
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 Direct
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 Direct
May 19, 2017 SEI Solaris Oilfield Infrastructure, LLC Units→ Class A Common Stock (15,022,824) 15,022,824 Direct
Feb. 10, 2017 METCZ Common Stock, $0.01 par value 3,749,691 Direct