SI Shoulder Innovations, Inc.

NYSE
$18.35

Shoulder Innovations, Inc. (SI) 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
7 buyers / 2 sellers
STRONG BUYING
Funds compared
10
funds with comparable SI positions
8 current holders · 5 prior-quarter holders
Net share change
-199.4K
+227.5K added, -426.9K cut
Position activity
5 new 2 increased 0 reduced 2 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
Point72 Asset Management, L.P. New +22.9K — $464.8K 0.0% 59
MILLENNIUM MANAGEMENT LLC Sold Out -193.9K -100.0% $3.9M 0.0% 59
Alyeska Investment Group, L.P. Sold Out -233.0K -100.0% $4.7M 0.0% 58
MARSHALL WACE, LLP Long/Short New +38.7K — $784.2K 0.0% 56
Squarepoint Ops LLC Quant New +44.2K — $895.5K 0.0% 54
Schonfeld Strategic Advisors Long/Short Quant New +77.7K — $1.6M 0.0% 53
CITADEL ADVISORS LLC Quant Increased +23.3K +172.1% $471.9K 0.0% 52
AQR Capital Management Long/Short Quant New +19.8K — $401.0K 0.0% 51
Walleye Capital Long/Short Quant Increased +972 +1.1% $19.7K 0.0% 20

Most significant buyers

By move score, not size.

  • Point72 Asset Management, L.P. New · +22.9K
  • MARSHALL WACE, LLP New · +38.7K
  • Squarepoint Ops LLC New · +44.2K
  • Schonfeld Strategic Advisors New · +77.7K
  • CITADEL ADVISORS LLC Increased · +23.3K

Most significant sellers

By move score, not size.

  • MILLENNIUM MANAGEMENT LLC Sold Out · -193.9K
  • Alyeska Investment Group, L.P. Sold Out · -233.0K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Point72 Asset Management, L.P. 1 22.9K 0 +22.9K — 0.0% New 59
MILLENNIUM MANAGEMENT LLC 2 0 193.9K -193.9K -100.0% 0.0% Sold Out 59
Alyeska Investment Group, L.P. 2 0 233.0K -233.0K -100.0% 0.0% Sold Out 58
MARSHALL WACE, LLP 2 38.7K 0 +38.7K — 0.0% New 56
Squarepoint Ops LLC 2 44.2K 0 +44.2K — 0.0% New 54
Schonfeld Strategic Advisors 3 77.7K 0 +77.7K — 0.0% New 53
CITADEL ADVISORS LLC 1 36.8K 13.5K +23.3K +172.1% 0.0% Increased 52
AQR Capital Management 3 19.8K 0 +19.8K — 0.0% New 51
Walleye Capital 3 86.2K 85.2K +972 +1.1% 0.0% Increased 20
Readystate Asset Management 3 39.4K 39.4K 0 +0.0% 0.1% Unchanged 14

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.