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Livermore
Livermore
ZHEN

Senator Investment Group LP

SEC CIK
0001443689
Latest filing
Aug 12, 2026

The latest 13F from Senator Investment Group LP covers Q2 2026 (filed Aug 12, 2026): 58 long positions worth $2.74B. The top 10 holdings make up 49.5% of the portfolio, and the largest is DPC Holdings PLC (DPC) at 9.0%. 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
19
Est. +$941.1M
Added
11
Est. +$387.2M
Reduced
22
Est. −$605.1M
Sold out
20
Est. −$507.5M

Top 5 holdings

Share of this quarter's portfolio value

  1. DPCDPC Holdings PLC
    9.0%$246.4MHistory
  2. SPYSPDR S&P 500 ETF Trust
    6.7%$183.7MHistory
  3. Invesco QQQ Trust Series I46090E103
    5.7%$157.2M
  4. UALUnited Airlines Holdings, Inc.
    5.3%$146.2MHistory
  5. BABoeing Co
    5.1%$139.9MHistory

Share of portfolio

Top 5 holdings and the other 53 positions, by share of portfolio value

  1. DPC9.0%
  2. SPY6.7%
  3. Invesco QQQ Trust Series I5.7%
  4. UAL5.3%
  5. BA5.1%
  6. Other 53 positions68.1%

Biggest buys

New and added positions, by estimated amount bought

  1. DPCDPC Holdings PLC
    +$246.4MNewHistory
  2. SPYSPDR S&P 500 ETF Trust
    +$181.5MAddedHistory
  3. Invesco QQQ Trust Series I46090E103
    +$157.2MNew
  4. AKAMAkamai Technologies Inc
    +$75.7MNewHistory
  5. FLEXFlex Ltd.
    +$67.0MNewHistory

Largest weight increases

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

  1. DPCDPC Holdings PLC
    +8.99 pp0.0% → 9.0%History
  2. SPYSPDR S&P 500 ETF Trust
    +6.61 pp0.1% → 6.7%History
  3. Invesco QQQ Trust Series I46090E103
    +5.74 pp0.0% → 5.7%
  4. AKAMAkamai Technologies Inc
    +2.76 pp0.0% → 2.8%History
  5. FLEXFlex Ltd.
    +2.45 pp0.0% → 2.4%History

Biggest sells

Reduced and sold-out positions, by estimated amount sold

  1. MSFTMicrosoft Corp
    −$99.0MSold outHistory
  2. NVDANVIDIA Corp
    −$97.7MReducedHistory
  3. WBDWarner Bros. Discovery, Inc.
    −$80.8MReducedHistory
  4. VRTVertiv Holdings Co
    −$64.0MReducedHistory
  5. UALUnited Airlines Holdings, Inc.
    −$48.2MReducedHistory

Largest weight decreases

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

  1. MSFTMicrosoft Corp
    −4.55 pp4.5% → 0.0%History
  2. NVDANVIDIA Corp
    −4.15 pp6.6% → 2.5%History
  3. WBDWarner Bros. Discovery, Inc.
    −3.82 pp3.8% → <0.1%History
  4. AMZNAmazon Com Inc
    −2.18 pp5.8% → 3.7%History
  5. VRTVertiv Holdings Co
    −2.15 pp3.0% → 0.8%History

Metrics

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

Portfolio value
$2.74B
+$562.4M (+25.8%) vs. prior quarter
Positions
58
−1 vs. prior quarter
Top 10 concentration
49.5%
Top 10 as share of value
Turnover
45.2%
Q2 2026, one quarter
Average holding period
4.4 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 $5.84B (Q3 2021)

Q1 2021: $4.86BQ2 2021: $5.27BQ3 2021: $5.84BQ4 2021: $5.17BQ1 2022: $3.23BQ2 2022: $1.40BQ3 2022: $1.10BQ4 2022: $1.11BQ1 2023: $1.82BQ2 2023: $2.20BQ3 2023: $1.78BQ4 2023: $2.33BQ1 2024: $2.19BQ2 2024: $2.05BQ3 2024: $2.11BQ4 2024: $3.41BQ1 2025: $1.88BQ2 2025: $2.59BQ3 2025: $2.71BQ4 2025: $2.49BQ1 2026: $2.18BQ2 2026: $2.74B
Q1 2021Q2 2026
13F filings of Senator Investment Group LP by quarter
QuarterFiledPositionsValueTop 3 holdingsChangesFiling
Q2 2026Aug 12, 202658$2.74BDPCSPYInvesco QQQ Trust Series Ivs. Q1 2026SEC
Q1 2026May 13, 202659$2.18BNVDAUALAMZNvs. Q4 2025SEC
Q4 2025Feb 13, 202659$2.49BUALWWDCOFvs. Q3 2025SEC
Q3 2025Nov 14, 202560$2.71BUALWWDIBITvs. Q2 2025SEC
Q2 2025Aug 13, 202554$2.59BUALIBITHOODvs. Q1 2025SEC
Q1 2025May 14, 202551$1.88BUALCVNASSNCvs. Q4 2024SEC
Q4 2024Feb 13, 202568$3.41BInvesco QQQ Trust Series IUALAPDvs. Q3 2024SEC
Q3 2024Nov 13, 202462$2.11BAMZNVZICEvs. Q2 2024SEC
Q2 2024Aug 20, 202470$2.05BAMZNICEAIGvs. Q1 2024SEC
Q1 2024May 14, 202468$2.19BAMZNMETAAIGvs. Q4 2023SEC
Q4 2023Feb 14, 202470$2.33BMETAiShares Russell 2000 ETFAMZNvs. Q3 2023SEC
Q3 2023Nov 14, 202354$1.78BMETAICEAPOvs. Q2 2023SEC
Q2 2023Aug 11, 202353$2.20BInvesco QQQ Trust Series IMETAAPOvs. Q1 2023SEC
Q1 2023May 12, 202345$1.82BMETAVMCCTLTvs. Q4 2022SEC
Q4 2022Feb 14, 202342$1.11BSPYHUMDHRvs. Q3 2022SEC
Q3 2022Nov 10, 202249$1.10BHUMALLBMRNvs. Q2 2022SEC
Q2 2022Aug 15, 202254$1.40BHUMDHRBMRNvs. Q1 2022SEC
Q1 2022May 13, 202272$3.23BAMZNDHRDNAvs. Q4 2021SEC
Q4 2021Feb 11, 202290$5.17BDNAInvesco QQQ Trust Series IAMZNvs. Q3 2021SEC
Q3 2021Nov 12, 2021116$5.84BDNAAMZNAPOvs. Q2 2021SEC
Q2 2021Aug 13, 2021121$5.27BMETAAMZNTMUSvs. Q1 2021SEC
Q1 2021May 17, 2021127$4.86BSPYUNHTMUS–SEC

13D and 13G filings

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

Current stakes of 5% or more

Senator Investment Group LP does not currently report owning 5% or more of any company.

Latest filings

20 filings on file made by Senator Investment Group LP or listing it as a reporting person, newest first.

Schedule 13D and 13G filings by Senator Investment Group LP
CompanyFiled (ET)FormStakeChangeEvent dateFiling
OWLBlue Owl Capital Inc.Apr 4, 202313G/AOld format–––SEC
Golden Falcon Acquisition Corp.Apr 4, 202313G/AOld format–––SEC
DNAGinkgo Bioworks Holdings, Inc.Feb 10, 202313G/AOld format–––SEC
PRMPerimeter Solutions, Inc.Feb 10, 202313G/AOld format–––SEC
BHILBenson Hill, Inc.Feb 10, 202213G/AOld format–––SEC
DNAGinkgo Bioworks Holdings, Inc.Feb 10, 202213G/AOld format–––SEC
Poema Global Holdings Corp.Feb 10, 202213G/AOld format–––SEC
PRMPerimeter Solutions, Inc.Feb 10, 202213G/AOld format–––SEC
BTRSBTRS Holdings Inc.Feb 10, 202213G/AOld format–––SEC
PRMPerimeter Solutions, Inc.Nov 19, 202113GOld format–New–SEC
DNAGinkgo Bioworks Holdings, Inc.Sep 27, 202113GOld format–New–SEC
Gores Technology Partners, Inc.Mar 26, 202113GOld format–New–SEC
BTRSBTRS Holdings Inc.Feb 11, 202113G/AOld format–––SEC
Corelogic, Inc.Feb 4, 202113D/AOld format–––SEC
OWLBlue Owl Capital Inc.Feb 4, 202113GOld format–New–SEC
Poema Global Holdings Corp.Jan 19, 202113GOld format–New–SEC
BHILBenson Hill, Inc.Jan 19, 202113GOld format–New–SEC
Corelogic, Inc.Jan 11, 202113D/AOld format–––SEC
Corelogic, Inc.Jan 6, 202113D/AOld format–––SEC
Golden Falcon Acquisition Corp.Jan 4, 202113GOld format–New–SEC