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The Activist Investor Insider

Filings dated September 1–14, 2026

All 10 free

Top 10 Activist Investors: September 15, 2026

1 of 24 tracked activists disclosed moves in SEC filings from September 1–14, 2026; Boaz Weinstein led with $268.3K of disclosed buying.

Activists tracked
24
Active this period
1
Filings reviewed
18
New 13D campaigns
0
Disclosed buying
$268K
Disclosed selling
$18.4M
1Unchanged

Boaz Weinstein

Saba Capital Management

Bought $268KSold $18.4M

  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellReduced stakeContext · not counted
    Shares
    1,082,631
    Value
    $16,629,212est.
    Date invested
    Aug 31, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    209,500
    Value
    $3,199,065
    Date invested
    Sep 3, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    174,103
    Value
    $2,686,409
    Date invested
    Aug 28, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    167,151
    Value
    $2,555,739
    Date invested
    Sep 8, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    129,839
    Value
    $1,996,924
    Date invested
    Aug 31, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    111,062
    Value
    $1,673,704
    Date invested
    Sep 10, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    102,824
    Value
    $1,557,784
    Date invested
    Sep 9, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    79,453
    Value
    $1,213,247
    Date invested
    Sep 1, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    62,439
    Value
    $954,692
    Date invested
    Sep 4, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    53,758
    Value
    $821,422
    Date invested
    Sep 2, 2026
  • BlackRock ESG Capital Allocation Term Trust

    ECAT
    SellSold
    Shares
    41,280
    Value
    $612,182
    Date invested
    Sep 11, 2026
  • PIMCO Dynamic Income Strategy Fund

    PDX
    SellSold
    Shares
    19,000
    Value
    $416,480
    Date invested
    Sep 9, 2026
  • PIMCO Dynamic Income Strategy Fund

    PDX
    SellSold
    Shares
    11,560
    Value
    $252,933
    Date invested
    Sep 10, 2026
  • PIMCO Dynamic Income Strategy Fund

    PDX
    SellSold
    Shares
    10,471
    Value
    $229,734
    Date invested
    Sep 8, 2026
  • PIMCO Dynamic Income Strategy Fund

    PDX
    SellSold
    Shares
    10,128
    Value
    $219,372
    Date invested
    Sep 11, 2026
  • Ellsworth Growth & Income Fund Ltd

    ECF
    BuyBought
    Shares
    6,800
    Value
    $84,048
    Date invested
    Sep 4, 2026
  • Ellsworth Growth & Income Fund Ltd

    ECF
    BuyBought
    Shares
    5,000
    Value
    $61,250
    Date invested
    Sep 3, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    3,721
    Value
    $43,015
    Date invested
    Sep 3, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    2,000
    Value
    $22,960
    Date invested
    Sep 2, 2026
  • Ellsworth Growth & Income Fund Ltd

    ECF
    BuyBought
    Shares
    1,200
    Value
    $14,964
    Date invested
    Aug 28, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    1,179
    Value
    $13,617
    Date invested
    Sep 8, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    905
    Value
    $10,317
    Date invested
    Sep 1, 2026
  • New Germany Fund Inc

    GF
    BuyBought
    Shares
    800
    Value
    $9,240
    Date invested
    Sep 9, 2026
  • Gabelli Healthcare & WellnessRx Trust

    GRX
    BuyBought
    Shares
    500
    Value
    $5,040
    Date invested
    Sep 3, 2026
  • Gabelli Healthcare & WellnessRx Trust

    GRX
    BuyBought
    Shares
    400
    Value
    $3,884
    Date invested
    Sep 11, 2026
25 places up from number 7

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.

35 places up from number 8

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.

45 places up from number 9

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.

51 places down from number 4

Larry Robbins

Glenview Capital Management

Bought $1.09B

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

64 places up from number 10

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.

71 places down from number 6

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.

8No movement shown for carry-over entries

Keith Meister

Corvex Management

Bought $491M

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

9No movement shown for carry-over entries

David Einhorn

Greenlight Capital

Bought $409M

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

10No movement shown for carry-over entries

Mason Morfit

ValueAct Capital

Bought $391M

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

    Ellsworth Growth & Income Fund Ltd (ECF)

    Boaz Weinstein (#1) · Bought

  2. 2

    Ellsworth Growth & Income Fund Ltd (ECF)

    Boaz Weinstein (#1) · Bought

  3. 3

    New Germany Fund Inc (GF)

    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. 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 13.67% 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 Trustees (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

    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.

  3. 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.

  4. Ellsworth Growth & Income Fund Ltd (ECF)

    #1 Boaz Weinstein

    BuyBought

    Boaz Weinstein reported open-market purchases of Ellsworth Growth & Income Fund Ltd (ECF) on Form 4, which insiders and large holders must file within two business days.

  5. 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.

  6. Gabelli Healthcare & WellnessRx Trust (GRX)

    #1 Boaz Weinstein

    BuyBought

    Boaz Weinstein reported open-market purchases of Gabelli Healthcare & WellnessRx Trust (GRX) on Form 4, which insiders and large holders must file within two business days.

Notes on carried-over moves (54 filings from before this period)
  1. Visa Inc (V)

    #2 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)

    #2 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)

    #2 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)

    #2 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)

    #2 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)

    #2 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)

    #2 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

    #3 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)

    #3 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)

    #3 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)

    #3 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)

    #3 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)

    #3 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)

    #3 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)

    #3 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)

    #3 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)

    #3 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)

    #4 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)

    #4 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)

    #4 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)

    #4 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)

    #4 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. Agilent Technologies Inc (A)

    #5 Larry Robbins

    BuyNew position

    Agilent Technologies Inc (A) was a new position in Larry Robbins's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  24. Thermo Fisher Scientific Inc (TMO)

    #5 Larry Robbins

    BuyAdded

    Thermo Fisher Scientific Inc (TMO) was an increased position in Larry Robbins's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  25. Danaher Corp (DHR)

    #5 Larry Robbins

    BuyAdded

    Danaher Corp (DHR) was an increased position in Larry Robbins's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  26. Global Pmts Inc (GPN)

    #5 Larry Robbins

    BuyAdded

    Global Pmts Inc (GPN) was an increased position in Larry Robbins's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  27. Tenet Healthcare Corp (THC)

    #5 Larry Robbins

    BuyAdded

    Tenet Healthcare Corp (THC) was an increased position in Larry Robbins's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  28. Meta Platforms Inc (META)

    #5 Larry Robbins

    BuyAdded

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

  29. Comcast Corp (CMCSA)

    #6 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.

  30. Viasat Inc (VSAT)

    #6 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.

  31. Verizon Communications Inc (VZ)

    #6 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.

  32. Acadia Healthcare Company IN (ACHC)

    #6 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.

  33. Talen Energy Corp (TLN)

    #6 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.

  34. Vistance Networks Inc (VISN)

    #6 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.

  35. Universal Hlth Svcs Inc (UHS)

    #6 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.

  36. Centuri Holdings Inc (CTRI)

    #6 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.

  37. Telephone & Data Sys Inc (TDS)

    #6 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.

  38. Core Scientific Inc (CORZ)

    #6 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.

  39. Cannae Holdings, Inc. (CNNE)

    #6 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.

  40. Dynatrace Inc (DT)

    #7 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.

  41. Flowserve Corp (FLS)

    #7 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.

  42. Vistra Corp (VST)

    #8 Keith Meister

    BuyNew position

    Vistra Corp (VST) was a new position in Keith Meister's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  43. Meta Platforms Inc (META)

    #8 Keith Meister

    BuyAdded

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

  44. Planet Fitness Master Issuer (PLNT)

    #8 Keith Meister

    BuyNew position

    Planet Fitness Master Issuer (PLNT) was a new position in Keith Meister's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  45. Liberty Media Corp (FWONK)

    #8 Keith Meister

    BuyNew position

    Liberty Media Corp (FWONK) was a new position in Keith Meister's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  46. Onterris Inc (ONT)

    #8 Keith Meister

    BuyNew position

    Onterris Inc (ONT) was a new position in Keith Meister's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  47. Fortune Brands Innovations I (FBIN)

    #9 David Einhorn

    BuyNew position

    Fortune Brands Innovations I (FBIN) was a new position in David Einhorn's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  48. Versigent PLC (VGNT)

    #9 David Einhorn

    BuyNew position

    Versigent PLC (VGNT) was a new position in David Einhorn's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  49. Primo Brands Corporation (PRMB)

    #9 David Einhorn

    BuyNew position

    Primo Brands Corporation (PRMB) was a new position in David Einhorn's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  50. Paypal Hldgs Inc (PYPL)

    #9 David Einhorn

    BuyNew position

    Paypal Hldgs Inc (PYPL) was a new position in David Einhorn's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  51. Warner Bros Discovery Inc

    #9 David Einhorn

    BuyNew position

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

  52. Rocket Cos Inc (RKT)

    #10 Mason Morfit

    BuyAdded

    Rocket Cos Inc (RKT) was an increased position in Mason Morfit's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  53. CBRE Group Inc (CBRE)

    #10 Mason Morfit

    BuyAdded

    CBRE Group Inc (CBRE) was an increased position in Mason Morfit's quarterly 13F for the quarter ended June 30, 2026; 13F reports are filed weeks after the quarter ends.

  54. Spotify Technology S A (SPOT)

    #10 Mason Morfit

    BuyAdded

    Spotify Technology S A (SPOT) was an increased position in Mason Morfit'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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