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The Activist Investor Insider

Filings dated September 15–30, 2026

All 10 free

Top 10 Activist Investors: October 1, 2026

5 of 24 tracked activists disclosed moves in SEC filings from September 15–30, 2026; Boaz Weinstein led with $20.1M of disclosed buying; 1 new Schedule 13D campaign.

Activists tracked
24
Active this period
5
Filings reviewed
24
New 13D campaigns
1
Disclosed buying
$20.1M
Disclosed selling
$30.5M
1Unchanged

Boaz Weinstein

Saba Capital Management

Bought $20.1MSold $3.1M

  • Virtus Total Return Fund Inc.

    ZTR
    BuyNew 13D stake
    Shares
    2,519,703
    Value
    $15,017,430est.
    Date invested
    Sep 28, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellReduced stakeContext · not counted
    Shares
    1,005,019
    Value
    $14,432,073est.
    Date invested
    Sep 18, 2026
  • Japan Smaller Capitalization Fund, Inc.

    JOF
    BuyIncreased stake
    Shares
    303,991
    Value
    $3,836,366est.
    Date invested
    Sep 21, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    100,836
    Value
    $1,392,545
    Date invested
    Sep 16, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    28,464
    Value
    $598,313
    Date invested
    Sep 23, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    28,977
    Value
    $416,689
    Date invested
    Sep 18, 2026
  • PIMCO Dynamic Income Strategy Fund

    PDX
    SellSold
    Shares
    19,692
    Value
    $406,837
    Date invested
    Sep 16, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    26,644
    Value
    $388,736
    Date invested
    Sep 14, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    21,095
    Value
    $302,924
    Date invested
    Sep 17, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    14,185
    Value
    $153,482
    Date invested
    Sep 18, 2026
  • New Germany Fund Inc

    GF
    SellSold
    Shares
    12,336
    Value
    $135,079
    Date invested
    Sep 22, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    6,403
    Value
    $132,094
    Date invested
    Sep 16, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    4,133
    Value
    $85,718
    Date invested
    Sep 28, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    5,256
    Value
    $56,449
    Date invested
    Sep 25, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    4,657
    Value
    $50,528
    Date invested
    Sep 23, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    2,034
    Value
    $42,775
    Date invested
    Sep 21, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    3,306
    Value
    $36,102
    Date invested
    Sep 15, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    1,049
    Value
    $21,704
    Date invested
    Sep 24, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    834
    Value
    $17,297
    Date invested
    Sep 25, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    1,534
    Value
    $16,690
    Date invested
    Sep 16, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    1,258
    Value
    $13,964
    Date invested
    Sep 17, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    1,272
    Value
    $13,649
    Date invested
    Sep 28, 2026
  • New Germany Fund Inc

    GF
    SellSold
    Shares
    930
    Value
    $10,193
    Date invested
    Sep 21, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    459
    Value
    $9,589
    Date invested
    Sep 15, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    500
    Value
    $5,425
    Date invested
    Sep 24, 2026
  • Mexico Fund Inc

    MXF
    BuyBought
    Shares
    110
    Value
    $2,299
    Date invested
    Sep 22, 2026
2New

Paul Singer

Elliott Investment Management

Net sold $27.4M

  • Seadrill Ltd

    SDRL
    SellReduced stake
    Shares
    570,034
    Value
    $27,424,336est.
    Date invested
    Sep 17, 2026
3New

Carl Icahn

Icahn Enterprises

Filing updates, no valued trades

  • Icahn Enterprises L.P.

    IEP
    UpdateStake update
    Shares
    —
    Value
    —
    Date invested
    Sep 23, 2026
4New

Chris Kiper

Legion Partners

Filing updates, no valued trades

  • Lifecore Biomedical, Inc.

    LFCR
    UpdateStake update
    Shares
    —
    Value
    —
    Date invested
    Sep 27, 2026
64 places down from number 2

Bill Ackman

Pershing Square Capital Management

Bought $5.03B

Carried overFrom earlier filings: no new filings this period, so this shows buys filed in the prior 90 days.

74 places down from number 3

Daniel Loeb

Third Point

Bought $2B

Carried overFrom earlier filings: no new filings this period, so this shows buys filed in the prior 90 days.

84 places down from number 4

Scott Ferguson

Sachem Head Capital Management

Bought $1.51B

Carried overFrom earlier filings: no new filings this period, so this shows buys filed in the prior 90 days.

93 places down from number 6

Dan Gropper

Carronade Capital Management

Bought $767M

Carried overFrom earlier filings: no new filings this period, so this shows buys filed in the prior 90 days.

103 places down from number 7

Jeff Smith

Starboard Value

Bought $496M

Carried overFrom earlier filings: no new filings this period, so this shows buys filed in the prior 90 days.

How to read values: plain figures are Form 4 transaction prices; est. = shares × the market close on the 13D event date; 13F = the fund's own quarterly 13F valuation, dated to the quarter. “Context” rows are shown but not counted, so the same purchase is never ranked twice. A dash means the filing gives no figure to show. Every row links to its filing on SEC EDGAR. Full methodology.

This edition

Highlights

Biggest disclosed buys

  1. 1

    Virtus Total Return Fund Inc. (ZTR)

    Boaz Weinstein (#1) · New 13D stake

    $15,017,430est.13DFiled Sep 30
  2. 2

    Japan Smaller Capitalization Fund, Inc. (JOF)

    Boaz Weinstein (#1) · Increased stake

    $3,836,366est.13D/AFiled Sep 23
  3. 3

    Mexico Fund Inc (MXF)

    Boaz Weinstein (#1) · Bought

Filing notes

From the filings

What the activists told the SEC, in their own words where a Schedule 13D gives them.

  1. Virtus Total Return Fund Inc. (ZTR)

    #1 Boaz Weinstein

    BuyNew 13D stake

    Boaz Weinstein disclosed a new activist stake in Virtus Total Return Fund Inc. (ZTR) in an initial Schedule 13D, reporting 5.04% of the class. The filing says the investor views the shares as undervalued.

    The Reporting Persons acquired the Common Shares to which this Schedule 13D relates in the ordinary course of business for investment purposes because they believe that the Common Shares are undervalued and represent an attractive investment opportunity. The Reporting Persons may engage in discussions with management, the Board of Directors (the "Board"), other shareholders of the Issuer and other relevant parties, including representatives of any of the foregoing, concerning the Reporting Persons' investment in the Common Shares and the Issuer, including, without limitation, matters…
    Item 4, purpose of the transaction
  2. BlackRock ESG Capital Allocation Term Trust (ECAT)

    #1 Boaz Weinstein

    SellReduced stakeContext · not counted

    Boaz Weinstein reported a smaller stake in BlackRock ESG Capital Allocation Term Trust (ECAT), now 12.66% of the class, in an amended Schedule 13D.

  3. Japan Smaller Capitalization Fund, Inc. (JOF)

    #1 Boaz Weinstein

    BuyIncreased stake

    Boaz Weinstein reported a larger stake in Japan Smaller Capitalization Fund, Inc. (JOF), now 8.8% of the class, in an amended Schedule 13D. The filing says the investor views the shares as undervalued.

    The Reporting Persons acquired the Common Shares to which this Schedule 13D/A relates in the ordinary course of business for investment purposes because they believe that the Common Shares are undervalued and represent an attractive investment opportunity. The Reporting Persons may engage in discussions with management, the Board of Directors (the "Board"), other shareholders of the Issuer and other relevant parties, including representatives of any of the foregoing, concerning the Reporting Persons' investment in the Common Shares and the Issuer, including, without limitation, matters…
    Item 4, purpose of the transaction
  4. BlackRock ESG Capital Allocation Term Trust (ECAT)

    #1 Boaz Weinstein

    SellSold

    Boaz Weinstein reported open-market sales of BlackRock ESG Capital Allocation Term Trust (ECAT) on Form 4, which insiders and large holders must file within two business days.

  5. Mexico Fund Inc (MXF)

    #1 Boaz Weinstein

    BuyBought

    Boaz Weinstein reported open-market purchases of Mexico Fund Inc (MXF) on Form 4, which insiders and large holders must file within two business days.

  6. PIMCO Dynamic Income Strategy Fund (PDX)

    #1 Boaz Weinstein

    SellSold

    Boaz Weinstein reported open-market sales of PIMCO Dynamic Income Strategy Fund (PDX) on Form 4, which insiders and large holders must file within two business days.

  7. New Germany Fund Inc (GF)

    #1 Boaz Weinstein

    BuyBought

    Boaz Weinstein reported open-market purchases of New Germany Fund Inc (GF) on Form 4, which insiders and large holders must file within two business days.

  8. New Germany Fund Inc (GF)

    #1 Boaz Weinstein

    SellSold

    Boaz Weinstein reported open-market sales of New Germany Fund Inc (GF) on Form 4, which insiders and large holders must file within two business days.

  9. Seadrill Ltd (SDRL)

    #2 Paul Singer

    SellReduced stake

    Paul Singer reported a smaller stake in Seadrill Ltd (SDRL), now 5.8% of the class, in an amended Schedule 13D.

  10. Icahn Enterprises L.P. (IEP)

    #3 Carl Icahn

    UpdateStake update

    Carl Icahn filed an amended Schedule 13D on Icahn Enterprises L.P. (IEP), reporting 87.69% of the class. The filing's higher share count comes from dividends paid in shares or units, not purchases, so it is not counted as buying.

  11. Lifecore Biomedical, Inc. (LFCR)

    #4 Chris Kiper

    UpdateStake update

    Chris Kiper filed an amended Schedule 13D on Lifecore Biomedical, Inc. (LFCR), reporting 17.3% of the class. The filing's higher share count comes from stock awards, dividends paid in shares or units and conversions, not purchases, so it is not counted as buying. The filing describes a merger agreement signed by the company.

    On September 27, 2026, the Issuer entered into an Agreement and Plan of Merger (the "Merger Agreement") with Lifecore Inc., a Delaware corporation ("Parent"), and Hazel Merger Sub, Inc., a Delaware corporation and a direct wholly owned Subsidiary of Parent ("Merger Sub"). The Merger Agreement provides that, among other things, on the terms and subject to the conditions of the Merger Agreement, Merger Sub will merge with and into the Issuer (the "Merger"), with the Issuer surviving the Merger as a wholly owned subsidiary of Parent. Under the terms of the Merger Agreement, each Share issued…
    Item 4, purpose of the transaction
  12. Pearson PLC (PSO)

    #5 Christer Gardell

    UpdateStake update
    Board settlement

    Christer Gardell filed an amended Schedule 13D on Pearson PLC (PSO) with no change in the reported share count, reporting 19.4% of the class. The filing describes an agreement with the company on board seats or cooperation.

    On September 22, 2026, the Reporting Person entered into a relationship agreement (the "Relationship Agreement") with the Issuer pursuant to which the Issuer agreed, subject to the terms and conditions of the Relationship Agreement, to appoint Alexander Svensson (the "Shareholder Director") to serve as a non-executive director of the Issuer's board of directors (the "Board") and as a member of the Nomination & Governance Committee of the Board with effect from October 1, 2026, and to recommend the re-election of the Shareholder Director at each annual general meeting of the Issuer during the…
    Item 4, purpose of the transaction
Notes on carried-over moves (35 filings from before this period)
  1. Visa Inc (V)

    #6 Bill Ackman

    BuyNew position

    Visa Inc (V) was a new position in Bill Ackman's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  2. Mastercard Incorporated (MA)

    #6 Bill Ackman

    BuyNew position

    Mastercard Incorporated (MA) was a new position in Bill Ackman's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  3. S&P Global Inc (SPGI)

    #6 Bill Ackman

    BuyNew position

    S&P Global Inc (SPGI) was a new position in Bill Ackman's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  4. Netflix Inc. (NFLX)

    #6 Bill Ackman

    BuyNew position

    Netflix Inc. (NFLX) was a new position in Bill Ackman's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  5. Uber Technologies Inc (UBER)

    #6 Bill Ackman

    BuyAdded

    Uber Technologies Inc (UBER) was an increased position in Bill Ackman's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  6. Meta Platforms Inc (META)

    #6 Bill Ackman

    BuyAdded

    Meta Platforms Inc (META) was an increased position in Bill Ackman's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  7. Microsoft Corp (MSFT)

    #6 Bill Ackman

    BuyAdded

    Microsoft Corp (MSFT) was an increased position in Bill Ackman's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  8. Warner Bros Discovery Inc

    #7 Daniel Loeb

    BuyNew position

    Warner Bros Discovery Inc was a new position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  9. Alphabet Inc (GOOGL)

    #7 Daniel Loeb

    BuyAdded

    Alphabet Inc (GOOGL) was an increased position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  10. Keysight Technologies Inc (KEYS)

    #7 Daniel Loeb

    BuyNew position

    Keysight Technologies Inc (KEYS) was a new position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  11. Block Inc (XYZ)

    #7 Daniel Loeb

    BuyNew position

    Block Inc (XYZ) was a new position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  12. Flex Ltd (FLEX)

    #7 Daniel Loeb

    BuyNew position

    Flex Ltd (FLEX) was a new position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  13. Norfolk Southn Corp (NSC)

    #7 Daniel Loeb

    BuyAdded

    Norfolk Southn Corp (NSC) was an increased position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  14. Capital One Finl Corp (COF)

    #7 Daniel Loeb

    BuyAdded

    Capital One Finl Corp (COF) was an increased position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  15. Live Nation Entertainment IN (LYV)

    #7 Daniel Loeb

    BuyAdded

    Live Nation Entertainment IN (LYV) was an increased position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  16. TTM Technologies Inc (TTMI)

    #7 Daniel Loeb

    BuyNew position

    TTM Technologies Inc (TTMI) was a new position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  17. Taiwan Semiconductor Manufac (TSM)

    #7 Daniel Loeb

    BuyAdded

    Taiwan Semiconductor Manufac (TSM) was an increased position in Daniel Loeb's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  18. Seagate Technology Hldngs PL (STX)

    #8 Scott Ferguson

    BuyNew position

    Seagate Technology Hldngs PL (STX) was a new position in Scott Ferguson's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  19. MKS Inc. (MKSI)

    #8 Scott Ferguson

    BuyNew position

    MKS Inc. (MKSI) was a new position in Scott Ferguson's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  20. Celsius Hldgs Inc (CELH)

    #8 Scott Ferguson

    BuyNew position

    Celsius Hldgs Inc (CELH) was a new position in Scott Ferguson's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  21. Carvana Co (CVNA)

    #8 Scott Ferguson

    BuyAdded

    Carvana Co (CVNA) was an increased position in Scott Ferguson's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  22. Golar LNG Ltd (GLNG)

    #8 Scott Ferguson

    BuyNew position

    Golar LNG Ltd (GLNG) was a new position in Scott Ferguson's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  23. Comcast Corp (CMCSA)

    #9 Dan Gropper

    BuyNew position

    Comcast Corp (CMCSA) was a new position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  24. Viasat Inc (VSAT)

    #9 Dan Gropper

    BuyAdded

    Viasat Inc (VSAT) was an increased position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  25. Verizon Communications Inc (VZ)

    #9 Dan Gropper

    BuyNew position

    Verizon Communications Inc (VZ) was a new position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  26. Acadia Healthcare Company IN (ACHC)

    #9 Dan Gropper

    BuyAdded

    Acadia Healthcare Company IN (ACHC) was an increased position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  27. Talen Energy Corp (TLN)

    #9 Dan Gropper

    BuyAdded

    Talen Energy Corp (TLN) was an increased position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  28. Vistance Networks Inc (VISN)

    #9 Dan Gropper

    BuyAdded

    Vistance Networks Inc (VISN) was an increased position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  29. Universal Hlth Svcs Inc (UHS)

    #9 Dan Gropper

    BuyNew position

    Universal Hlth Svcs Inc (UHS) was a new position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  30. Centuri Holdings Inc (CTRI)

    #9 Dan Gropper

    BuyAdded

    Centuri Holdings Inc (CTRI) was an increased position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  31. Telephone & Data Sys Inc (TDS)

    #9 Dan Gropper

    BuyAdded

    Telephone & Data Sys Inc (TDS) was an increased position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  32. Core Scientific Inc (CORZ)

    #9 Dan Gropper

    BuyAdded

    Core Scientific Inc (CORZ) was an increased position in Dan Gropper's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  33. Cannae Holdings, Inc. (CNNE)

    #9 Dan Gropper

    BuyIncreased stake

    Dan Gropper reported a larger stake in Cannae Holdings, Inc. (CNNE), now 7.8% of the class, in an amended Schedule 13D.

  34. Dynatrace Inc (DT)

    #10 Jeff Smith

    BuyNew position

    Dynatrace Inc (DT) was a new position in Jeff Smith's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  35. Flowserve Corp (FLS)

    #10 Jeff Smith

    BuyNew position

    Flowserve Corp (FLS) was a new position in Jeff Smith's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

Notes summarise the filing text only and add no figures of their own. The filing is always the authoritative source.

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