YSS York Space Systems Inc.

NYSE
$7.88

York Space Systems Inc. (YSS) 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
-55.56
6 buyers / 21 sellers
STRONG SELLING
Funds compared
28
funds with comparable YSS positions
13 current holders · 24 prior-quarter holders
Net share change
-3.12M
+130.6K added, -3.25M cut
Position activity
4 new 2 increased 6 reduced 15 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
RENAISSANCE TECHNOLOGIES LLC Quant Sold Out -67.2K -100.0% $1.7M 0.0% 60
D. E. Shaw & Co., Inc. Quant Sold Out -100.9K -100.0% $2.5M 0.0% 60
MILLENNIUM MANAGEMENT LLC New +41.3K — $1.0M 0.0% 59
Alyeska Investment Group, L.P. Sold Out -288.6K -100.0% $7.1M 0.0% 58
Empyrean Capital Partners Event Sold Out -95.0K -100.0% $2.3M 0.0% 57
Weiss Asset Management Event Quant Sold Out -202.2K -100.0% $5.0M 0.0% 57
Zimmer Partners Long/Short Sold Out -115.0K -100.0% $2.8M 0.0% 56
Davidson Kempner Capital Management Event Value Sold Out -21.4K -100.0% $526.9K 0.0% 56
MARSHALL WACE, LLP Long/Short New +32.5K — $800.5K 0.0% 56
Hudson Bay Capital Management Event Sold Out -197.1K -100.0% $4.9M 0.0% 55

Most significant buyers

By move score, not size.

  • MILLENNIUM MANAGEMENT LLC New · +41.3K
  • MARSHALL WACE, LLP New · +32.5K
  • Gotham Asset Management, LLC New · +9.2K
  • AQR Capital Management New · +27.8K
  • Squarepoint Ops LLC Increased · +10.9K

Most significant sellers

By move score, not size.

  • RENAISSANCE TECHNOLOGIES LLC Sold Out · -67.2K
  • D. E. Shaw & Co., Inc. Sold Out · -100.9K
  • Alyeska Investment Group, L.P. Sold Out · -288.6K
  • Empyrean Capital Partners Sold Out · -95.0K
  • Weiss Asset Management Sold Out · -202.2K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
RENAISSANCE TECHNOLOGIES LLC 1 0 67.2K -67.2K -100.0% 0.0% Sold Out 60
D. E. Shaw & Co., Inc. 1 0 100.9K -100.9K -100.0% 0.0% Sold Out 60
MILLENNIUM MANAGEMENT LLC 2 41.3K 0 +41.3K — 0.0% New 59
Alyeska Investment Group, L.P. 2 0 288.6K -288.6K -100.0% 0.0% Sold Out 58
Empyrean Capital Partners 2 0 95.0K -95.0K -100.0% 0.0% Sold Out 57
Weiss Asset Management 2 0 202.2K -202.2K -100.0% 0.0% Sold Out 57
Zimmer Partners 2 0 115.0K -115.0K -100.0% 0.0% Sold Out 56
Davidson Kempner Capital Management 2 0 21.4K -21.4K -100.0% 0.0% Sold Out 56
MARSHALL WACE, LLP 2 32.5K 0 +32.5K — 0.0% New 56
Hudson Bay Capital Management 3 0 197.1K -197.1K -100.0% 0.0% Sold Out 55
CITADEL ADVISORS LLC 1 27.3K 947.9K -920.6K -97.1% 0.0% Reduced 55
LMR Partners 3 0 110.7K -110.7K -100.0% 0.0% Sold Out 55
Gotham Asset Management, LLC 2 9.2K 0 +9.2K — 0.0% New 54
Scopus Asset Management 2 0 32.9K -32.9K -100.0% 0.0% Sold Out 54
Woodline Partners LP 2 0 30.0K -30.0K -100.0% 0.0% Sold Out 54
Schonfeld Strategic Advisors 3 0 100.0K -100.0K -100.0% 0.0% Sold Out 53
Balyasny Asset Management L.P. 2 4.9K 305.0K -300.1K -98.4% 0.0% Reduced 53
Quadrature Capital 3 0 10.1K -10.1K -100.0% 0.0% Sold Out 52
CenterBook Partners 4 0 288.5K -288.5K -100.0% 0.0% Sold Out 52
AQR Capital Management 3 27.8K 0 +27.8K — 0.0% New 51
Readystate Asset Management 3 0 15.0K -15.0K -100.0% 0.0% Sold Out 50
Squarepoint Ops LLC 2 23.5K 12.5K +10.9K +87.2% 0.0% Increased 45
TWO SIGMA INVESTMENTS, LP 2 10.5K 38.4K -27.9K -72.7% 0.0% Reduced 44
Brevan Howard Capital Management 3 16.2K 108.7K -92.5K -85.1% 0.0% Reduced 42
Ghisallo Capital Management 2 200.0K 407.8K -207.8K -51.0% 0.1% Reduced 41
Tudor Investment Corporation 2 23.0K 14.3K +8.7K +61.2% 0.0% Increased 38
ExodusPoint Capital Management 3 570.8K 593.1K -22.3K -3.8% 0.1% Reduced 23
Walleye Capital 3 54.0K 54.0K 0 +0.0% 0.0% Unchanged 15

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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.