Comparable stake leader
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
SEC ownership of PLAINS GP HOLDINGS LP
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001581990.
Disclosed value leader
TORTOISE CAPITAL ADVISORS, L.L.C.
Comparable rows
50/50
Latest evidence
30 Jun 2026
- Public ticker
- PAGP on Nasdaq
- Parsed ownership sources
-
13F and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001581990
- Issuer location
- Houston, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of PLAINS GP HOLDINGS LP (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
MASSACHUSETTS FINANCIAL S...
Disclosed value leader
TORTOISE CAPITAL ADVISORS...
Comparable rows
50/50
Latest evidence
30 Jun 2026
13F
13D/G
Lead comparable stake: 4.8%
13D/G row: MASSACHUSETTS FINANCIAL SERVICES CO /MA/
Showing 1-8 of 50 holder rows.
Quick read
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ leads the comparable SEC ownership view at 4.8%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s linked filing trail.
Comparable ownership
Top 5
MASSACHUSETTS FINANCIAL SERVICES ...
4.8%
Energy Income Partners, LLC
4.5%
TORTOISE CAPITAL ADVISORS, L.L.C.
5.6%
CHICKASAW CAPITAL MANAGEMENT LLC
4.4%
TWO SIGMA INVESTMENTS, LP
3.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ |
13F
13D/G
Company · Massachusetts Financial Services Company
|
4.8%
from 13D/G
|
$216,752,069
8,930,864 shares
|
— | 30 Jun 2026 |
| Energy Income Partners, LLC |
13F
13D/G
Company
|
4.5%
from 13D/G
|
$219,543,095
9,045,863 shares
|
— | 30 Jun 2026 |
| TORTOISE CAPITAL ADVISORS, L.L.C. |
13F
Company
|
5.6%
|
$269,804,639
11,116,796 shares
|
— | 30 Jun 2026 |
| CHICKASAW CAPITAL MANAGEMENT LLC |
13F
Company
|
4.4%
|
$209,454,000
8,630,172 shares
|
— | 30 Jun 2026 |
| TWO SIGMA INVESTMENTS, LP |
13F
Company
|
3.6%
|
$174,740,772
7,199,867 shares
|
— | 30 Jun 2026 |
| Clearbridge Investments, LLC |
13F
Company
|
3.5%
|
$166,369,977
6,854,964 shares
|
— | 30 Jun 2026 |
| GOLDMAN SACHS GROUP INC |
13F
Company
|
3.3%
|
$159,114,265
6,556,006 shares
|
— | 30 Jun 2026 |
| Artemis Investment Management LLP |
13F
Company
|
2.7%
|
$128,049,903
5,276,057 shares
|
— | 30 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 13 Sep 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to PLAINS GP HOLDINGS LP. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
Willie Cw Chiang
Net 12M change
$0
Latest report
01 Sep 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Willie Cw Chiang | Chairman & CEO, Director | $6,149,017 | Mixed | 28 Sep 2023 | ||
| Chris Temple | Director | $653,523 | Mixed | 17 Aug 2023 | ||
| Victor Burk | Director | $379,507 | Mixed | 13 Aug 2026 | ||
| KAFU Holdings (QP), L.P. | Other* | Mixed | 31 Dec 2021 | |||
| John T. Raymond | Director | Mixed | 13 Aug 2026 | |||
| Greg L. Armstrong | Director | Mixed | 11 Aug 2025 | |||
| Alexandra Pruner | Director | Mixed | 13 Aug 2026 | |||
| Jeremy L. Goebel | Evp & Cco | Mixed | 04 Jan 2023 | |||
| Cindy B. Taylor | Director | Mixed | 13 Aug 2026 | |||
| Gary R. Petersen | Director | Mixed | 13 Aug 2026 | |||
| Lawrence Michael Ziemba | Director | Mixed | 13 Aug 2026 | |||
| Bobby S. Shackouls | Director | Mixed | 13 Aug 2026 | |||
| Russell Lee Montgomery | VP, Acctg & CAO | Mixed | 01 Sep 2026 | |||
| Kevin S. McCarthy | Director | Mixed | 13 Aug 2026 | |||
| Ellen DeSanctis | Director | Mixed | 13 Aug 2026 |
Recent insider transactions for PLAINS GP HOLDINGS LP
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Lawrence Michael Ziemba | PAGP | Class A Shares | Options Exercise | 8.43% | 7,400 | 95,180 | 14 Aug 2026 | Direct | ||
| Lawrence Michael Ziemba | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Bobby S. Shackouls | PAGP | Class A Shares | Options Exercise | 10.1% | 7,400 | 80,801 | 14 Aug 2026 | Direct | ||
| Bobby S. Shackouls | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Raymond John T. | PAGP | Class A Shares | Options Exercise | 2.35% | 7,400 | 322,794 | 14 Aug 2026 | Direct | ||
| Raymond John T. | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Alexandra Pruner | PAGP | Class A Shares | Options Exercise | 9.15% | 7,400 | 88,294 | 14 Aug 2026 | Direct | ||
| Alexandra Pruner | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Gary R. Petersen | PAGP | Class A Shares | Options Exercise | 10.9% | 7,400 | 75,544 | 14 Aug 2026 | Direct | ||
| Gary R. Petersen | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Kevin S. McCarthy | PAGP | Class A Shares | Options Exercise | 4.98% | 7,400 | 156,091 | 14 Aug 2026 | Direct | ||
| Kevin S. McCarthy | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Ellen DeSanctis | PAGP | Class A Shares | Options Exercise | 20% | 7,400 | 44,500 | 14 Aug 2026 | Direct | ||
| Ellen DeSanctis | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Victor Burk | PAGP | Class A Shares | Options Exercise | 17.2% | 7,400 | 50,323 | 14 Aug 2026 | Direct | ||
| Victor Burk | PAGP | Phantom Class A Shares | Options Exercise | -100% | -7,400 | 0 | 14 Aug 2026 | Direct | ||
| Lawrence Michael Ziemba | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct | |||
| Cindy B. Taylor | PAGP | Phantom Class A Shares | Award | 7,700 | 7,700 | 13 Aug 2026 | Direct | |||
| Bobby S. Shackouls | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct | |||
| Raymond John T. | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct | |||
| Alexandra Pruner | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct | |||
| Gary R. Petersen | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct | |||
| Kevin S. McCarthy | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct | |||
| Ellen DeSanctis | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct | |||
| Victor Burk | PAGP | Phantom Class A Shares | Award | 6,150 | 6,150 | 13 Aug 2026 | Direct |
* marks a reported price that did not pass the local price check.