Yorktown X Associates LLC

CIK 1687161 · last filed 2019-12-18

Yorktown X Associates LLC is a corporate insider who has filed 6 SEC Form 4 insider transactions across 4 companies since 2016. The most recent filing, for MNRL, was dated Dec 18, 2019. Across all open-market trades the lifetime net is −$116.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $41.7M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Disclosed Exposure

$41.74M

Companies

4

Total Filings

6

Lifetime Open-Market Net

-$116.36M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
Brigham Minerals, Inc. (MNRL) Delisted	10%+ Owner	802,324	$32.50	$26.08M	-$13.94M	1	2019-12-18
Solaris Energy Infrastructure, Inc. (SOI) Delisted	10%+ Owner	1,000,000	$11.32	$11.32M	-$101.65M	3	2019-03-14
METC	10%+ Owner	3,726,959	$11.20	$41.74M	-$766.9K	1	2017-02-10
Extraction Oil & Gas, Inc. (XOG) Delisted	10%+ Owner	17,554,262	$68.54	$1.20B	$0	1	2016-10-31

Recent Filings

6 filings

Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.

Filed	Symbol	Action	Net Shares	Net $	Link
2019-12-18	Brigham Minerals, Inc. (MNRL) Delisted	Mixed	−802,324	-$13.94M	EDGAR
2019-03-14	Solaris Energy Infrastructure, Inc. (SOI) Delisted	Mixed	−2,000,000	-$31.15M	EDGAR
2018-01-16	Solaris Energy Infrastructure, Inc. (SOI) Delisted	Mixed	−1,408,388	-$30.49M	EDGAR
2017-11-15	Solaris Energy Infrastructure, Inc. (SOI) Delisted	Mixed	−2,660,201	-$40.01M	EDGAR
2017-02-10	METC	Sell (S)	−56,810	-$766.9K	EDGAR
2016-10-31	Extraction Oil & Gas, Inc. (XOG) Delisted	Grant (A)	+17,554,262	$0	EDGAR

Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.