GATX GATX Corporation

NYSE
$178.53

GATX Corporation (GATX) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
-23.81
8 buyers / 13 sellers
SELLING
Funds compared
22
funds with comparable GATX positions
19 current holders · 17 prior-quarter holders
Net share change
-7.2K
+102.0K added, -109.2K cut
Position activity
5 new 3 increased 10 reduced 3 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
MARSHALL WACE, LLP Long/Short New +4.9K — $874.1K 0.0% 56
Hudson Bay Capital Management Event New +40.2K — $7.1M 0.0% 55
Schonfeld Strategic Advisors Long/Short Quant New +9.2K — $1.6M 0.0% 53
Caxton Associates Macro Sold Out -4.0K -100.0% $706.6K 0.0% 53
ExodusPoint Capital Management Long/Short Quant New +2.2K — $392.1K 0.0% 52
Brevan Howard Capital Management Macro New +14.4K — $2.6M 0.0% 52
Boothbay Fund Management Sold Out -7.9K -100.0% $1.4M 0.0% 51
Y-Intercept Quant Sold Out -2.5K -100.0% $443.5K 0.0% 48
D. E. Shaw & Co., Inc. Quant Reduced -21.8K -73.3% $3.9M 0.0% 47
Quadrature Capital Quant Increased +3.9K +106.3% $691.6K 0.0% 47

Most significant buyers

By move score, not size.

  • MARSHALL WACE, LLP New · +4.9K
  • Hudson Bay Capital Management New · +40.2K
  • Schonfeld Strategic Advisors New · +9.2K
  • ExodusPoint Capital Management New · +2.2K
  • Brevan Howard Capital Management New · +14.4K

Most significant sellers

By move score, not size.

  • Caxton Associates Sold Out · -4.0K
  • Boothbay Fund Management Sold Out · -7.9K
  • Y-Intercept Sold Out · -2.5K
  • D. E. Shaw & Co., Inc. Reduced · -21.8K
  • Squarepoint Ops LLC Reduced · -18.9K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
MARSHALL WACE, LLP 2 4.9K 0 +4.9K — 0.0% New 56
Hudson Bay Capital Management 3 40.2K 0 +40.2K — 0.0% New 55
Schonfeld Strategic Advisors 3 9.2K 0 +9.2K — 0.0% New 53
Caxton Associates 3 0 4.0K -4.0K -100.0% 0.0% Sold Out 53
ExodusPoint Capital Management 3 2.2K 0 +2.2K — 0.0% New 52
Brevan Howard Capital Management 3 14.4K 0 +14.4K — 0.0% New 52
Boothbay Fund Management 4 0 7.9K -7.9K -100.0% 0.0% Sold Out 51
Y-Intercept 4 0 2.5K -2.5K -100.0% 0.0% Sold Out 48
D. E. Shaw & Co., Inc. 1 7.9K 29.7K -21.8K -73.3% 0.0% Reduced 47
Quadrature Capital 3 7.6K 3.7K +3.9K +106.3% 0.0% Increased 47
Squarepoint Ops LLC 2 3.6K 22.5K -18.9K -84.0% 0.0% Reduced 47
CITADEL ADVISORS LLC 1 62.6K 41.9K +20.7K +49.5% 0.0% Increased 41
MILLENNIUM MANAGEMENT LLC 2 6.6K 11.3K -4.7K -42.0% 0.0% Reduced 37
Aquatic Capital Management 4 2.1K 4.7K -2.7K -56.4% 0.0% Reduced 31
Quantbot Technologies 4 18.7K 12.2K +6.5K +53.5% 0.1% Increased 30
Qube Research & Technologies Ltd 2 37.3K 43.1K -5.8K -13.5% 0.0% Reduced 29
Tudor Investment Corporation 2 155.0K 181.9K -26.9K -14.8% 0.1% Reduced 29
TWO SIGMA INVESTMENTS, LP 2 19.7K 20.7K -984 -4.8% 0.0% Reduced 27
Walleye Capital 3 122.4K 131.8K -9.3K -7.1% 0.2% Reduced 25
Edgestream Partners 4 9.2K 11.1K -1.9K -16.8% 0.1% Reduced 22
AQR Capital Management 3 22.0K 23.8K -1.7K -7.3% 0.0% Reduced 21
Gotham Asset Management, LLC 2 2.3K 2.3K 0 +0.0% 0.0% Unchanged 18

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.