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Livermore
Livermore
ZHEN

Zimmer Partners, LP

SEC CIK
0001565854
Latest filing
Aug 14, 2026

The latest 13F from Zimmer Partners, LP covers Q2 2026 (filed Aug 14, 2026): 112 long positions worth $4.23B. The top 10 holdings make up 43.0% of the portfolio, and the largest is Welltower Inc. (WELL) at 6.0%. Livermore has 22 filings on Form 13F from this institution, going back to Q1 2021.

What changed in Q2 2026

Share counts compared with Q1 2026: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.

Full comparison
New
38
Est. +$888.9M
Added
28
Est. +$614.6M
Reduced
37
Est. −$848.3M
Sold out
46
Est. −$741.2M

Top 5 holdings

Share of this quarter's portfolio value

  1. WELLWelltower Inc.
    6.0%$255.1MHistory
  2. NINisource Inc.
    4.8%$203.4MHistory
  3. ESEversource Energy
    4.6%$194.5MHistory
  4. KGSKodiak Gas Services, Inc.
    4.5%$190.1MHistory
  5. XELXcel Energy Inc
    4.4%$186.6MHistory

Biggest buys

New and added positions, by estimated amount bought

  1. MAIRMadison Air Solutions Corp
    +$161.9MNewHistory
  2. PPLPPL Corp
    +$142.6MNewHistory
  3. LNGCheniere Energy, Inc.
    +$99.0MAddedHistory
  4. MGEEMge Energy Inc
    +$81.5MNewHistory
  5. PCGPG&E Corp
    +$58.3MAddedHistory

Largest weight increases

New and added positions, by percentage points of the portfolio gained

  1. MAIRMadison Air Solutions Corp
    +3.83 pp0.0% → 3.8%History
  2. PPLPPL Corp
    +3.37 pp0.0% → 3.4%History
  3. LNGCheniere Energy, Inc.
    +2.27 pp0.4% → 2.7%History
  4. MGEEMge Energy Inc
    +1.93 pp0.0% → 1.9%History
  5. FPSForgent Power Solutions, Inc.
    +1.60 pp1.4% → 3.0%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. TXNM Energy Inc69349HAF4
    −$127.1MSold out
  2. ADCAgree Realty Corp
    −$110.1MReducedHistory
  3. WECWec Energy Group, Inc.
    −$96.5MSold outHistory
  4. TXNMTXNM Energy Inc
    −$89.6MSold outHistory
  5. KTOSKratos Defense & Security Solutions, Inc.
    −$55.2MSold outHistory

Largest weight decreases

Reduced and sold-out positions, by percentage points of the portfolio lost

  1. TXNM Energy Inc69349HAF4
    −3.12 pp3.1% → 0.0%
  2. ADCAgree Realty Corp
    −2.79 pp6.1% → 3.3%History
  3. WECWec Energy Group, Inc.
    −2.37 pp2.4% → 0.0%History
  4. TXNMTXNM Energy Inc
    −2.20 pp2.2% → 0.0%History
  5. KMIKinder Morgan, Inc.
    −1.36 pp4.7% → 3.4%History

Metrics

13F metrics for Q2 2026, computed only from the numbers in the filings. Definitions below.

Portfolio value
$4.23B
+$152.6M (+3.7%) vs. prior quarter
Positions
112
−8 vs. prior quarter
Top 10 concentration
43.0%
Top 10 as share of value
Turnover
36.2%
Q2 2026, one quarter
Average holding period
7.5 quarters
Weighted by value

How these are calculated

  • Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
  • Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
  • Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
  • Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q1 2021), so positions held before then are understated.

13F filings by quarter

22 quarters, going back to Q1 2021. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.

Peak $7.22B (Q1 2021)

Q1 2021: $7.22BQ2 2021: $7.19BQ3 2021: $6.31BQ4 2021: $6.70BQ1 2022: $6.90BQ2 2022: $4.68BQ3 2022: $4.51BQ4 2022: $4.97BQ1 2023: $4.87BQ2 2023: $4.00BQ3 2023: $3.79BQ4 2023: $2.73BQ1 2024: $4.60BQ2 2024: $5.25BQ3 2024: $5.34BQ4 2024: $5.77BQ1 2025: $4.93BQ2 2025: $4.37BQ3 2025: $4.09BQ4 2025: $3.80BQ1 2026: $4.08BQ2 2026: $4.23B
Q1 2021Q2 2026
13F filings of Zimmer Partners, LP by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 14, 2026112$4.23BWELLNIESvs. Q1 2026SEC
Q1 2026May 15, 2026120$4.08BADCNIESvs. Q4 2025SEC
Q4 2025Feb 17, 2026119$3.80BESWELLXELvs. Q3 2025SEC
Q3 2025Nov 14, 2025133$4.09BESNITRGPvs. Q2 2025SEC
Q2 2025Aug 14, 2025145$4.37BESAEPXELvs. Q1 2025SEC
Q1 2025May 15, 2025147$4.93BAEPXELWELLvs. Q4 2024SEC
Q4 2024Feb 14, 2025145$5.77BWELLBATRGPvs. Q3 2024SEC
Q3 2024Nov 14, 2024143$5.34BWELLRYANAEEvs. Q2 2024SEC
Q2 2024Aug 14, 2024149$5.25BWELLEVRGESvs. Q1 2024SEC
Q1 2024May 15, 2024129$4.60BWELLAEERYANvs. Q4 2023SEC
Q4 2023Feb 14, 2024101$2.73BTRGPRYANADCvs. Q3 2023SEC
Q3 2023Nov 14, 2023118$3.79BPCGDRYANvs. Q2 2023SEC
Q2 2023Aug 14, 2023108$4.00BTRGPRYANPCGvs. Q1 2023SEC
Q1 2023May 15, 202396$4.87BAWKPCGPORvs. Q4 2022SEC
Q4 2022Feb 14, 202377$4.97BPCGPORTRGPvs. Q3 2022SEC
Q3 2022Nov 14, 202289$4.51BPCGWELLCMSvs. Q2 2022SEC
Q2 2022Aug 15, 202285$4.68BPCGWELLRYANvs. Q1 2022SEC
Q1 2022May 16, 2022108$6.90BWELLPCGTRGPvs. Q4 2021SEC
Q4 2021Feb 14, 2022116$6.70BWELLPCGEXCvs. Q3 2021SEC
Q3 2021Nov 15, 2021138$6.31BPCGWELLEIXvs. Q2 2021SEC
Q2 2021Aug 16, 2021167$7.19BPCGEIXEXCvs. Q1 2021SEC
Q1 2021May 17, 2021166$7.22BPCGEIXINVH–SEC

13D and 13G filings

Companies where Zimmer Partners, LP reports owning 5% or more on Schedule 13D or 13G, and its latest filings.

Current stakes of 5% or more

4 companies, largest stake first.

Companies where Zimmer Partners, LP owns 5% or more
CompanyLatest formStakeChangeFirst filedLatest filingFiling
JRVRJames River Group Holdings, Inc.13D10.00%4.62M sharesNewMay 15, 20261 filingMay 15, 2026SEC
JRVRJames River Group Holdings, Inc.13G/A10.00%4.59M shares+3.50 ppfrom 6.50%Aug 14, 20252 filingsNov 12, 2025SEC
YORWYork Water Co13G/A8.80%1.42M shares+3.60 ppfrom 5.20%Feb 9, 20235 filingsAug 14, 2026SEC
NHPNational Healthcare Properties, Inc.13G6.90%3.03M sharesNewAug 14, 20261 filingAug 14, 2026SEC

Latest filings

32 filings on file made by Zimmer Partners, LP or listing it as a reporting person; the latest 20 are shown.

Schedule 13D and 13G filings by Zimmer Partners, LP
CompanyFiled (ET)FormStakeChangeEvent dateFiling
YORWYork Water CoAug 14, 20269:25 AM ET13G/A8.80%1.42M shares+3.60 ppfrom 5.20%Jun 30, 2026SEC
NHPNational Healthcare Properties, Inc.Aug 14, 20269:23 AM ET13G6.90%3.03M sharesNewJun 30, 2026SEC
JRVRJames River Group Holdings, Inc.May 15, 20269:43 PM ET13D10.00%4.62M sharesNewMay 14, 2026SEC
FVRFrontView REIT, Inc.Feb 17, 20269:14 AM ET13G/A4.30%920.5K shares−1.60 ppfrom 5.90%Below 5%Dec 31, 2025SEC
JRVRJames River Group Holdings, Inc.Nov 12, 202512:19 PM ET13G/A10.00%4.59M shares+3.50 ppfrom 6.50%Sep 30, 2025SEC
HEHawaiian Electric Industries IncAug 14, 202510:05 AM ET13G/A2.20%3.83M shares–Below 5%Jun 30, 2025SEC
JRVRJames River Group Holdings, Inc.Aug 14, 20259:59 AM ET13G6.50%2.99M sharesNewJun 30, 2025SEC
SNCYSun Country Airlines Holdings, LLCAug 14, 20259:47 AM ET13G/A4.20%2.23M shares−1.00 ppfrom 5.20%Below 5%Jun 30, 2025SEC
FVRFrontView REIT, Inc.Aug 14, 20259:43 AM ET13G/A5.90%1.12M shares−2.20 ppfrom 8.10%Jun 30, 2025SEC
OPALOPAL Fuels Inc.May 15, 20259:02 AM ET13G/A4.00%1.15M shares–Below 5%Mar 31, 2025SEC
SNCYSun Country Airlines Holdings, LLCMay 15, 20259:02 AM ET13G5.20%2.77M sharesNewMar 31, 2025SEC
YORWYork Water CoFeb 14, 20259:26 AM ET13G5.20%746.9K shares–Dec 31, 2024SEC
FVRFrontView REIT, Inc.Feb 14, 20259:23 AM ET13G8.10%1.30M sharesNewDec 31, 2024SEC
OPALOPAL Fuels Inc.Nov 12, 202413G/AOld format–––SEC
HEHawaiian Electric Industries IncNov 12, 202413GOld format–New–SEC
YORWYork Water CoNov 12, 202413G/AOld format–––SEC
IIPRInnovative Industrial Properties IncFeb 13, 202413G/AOld format–––SEC
YORWYork Water CoFeb 13, 202413G/AOld format–––SEC
PORPortland General Electric CoFeb 13, 202413G/AOld format–––SEC
OPALOPAL Fuels Inc.Feb 13, 202413G/AOld format–––SEC