HTFL Heartflow, Inc.

NASDAQ
$49.88

Heartflow, Inc. (HTFL) 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
+12.00
14 buyers / 11 sellers
BUYING
Funds compared
26
funds with comparable HTFL positions
22 current holders · 20 prior-quarter holders
Net share change
+1.39M
+2.29M added, -894.4K cut
Position activity
6 new 8 increased 7 reduced 4 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 New +382.7K — $11.2M 0.0% 62
Point72 Asset Management, L.P. Increased +1.18M +219.7% $34.7M 0.1% 58
D. E. Shaw & Co., Inc. Quant New +8.7K — $254.7K 0.0% 58
Holocene Advisors, LP Sold Out -44.6K -100.0% $1.3M 0.0% 58
TWO SIGMA INVESTMENTS, LP Quant New +7.1K — $209.1K 0.0% 57
Verition Fund Management Event Long/Short Sold Out -11.5K -100.0% $337.2K 0.0% 54
Hudson Bay Capital Management Event Sold Out -22.4K -100.0% $656.3K 0.0% 53
LMR Partners Event Quant Sold Out -30.0K -100.0% $880.2K 0.0% 53
Voleon Capital Management Quant New +23.2K — $680.1K 0.0% 51
Trexquant Investment Quant New +26.8K — $785.7K 0.0% 51

Most significant buyers

By move score, not size.

  • RENAISSANCE TECHNOLOGIES LLC New · +382.7K
  • Point72 Asset Management, L.P. Increased · +1.18M
  • D. E. Shaw & Co., Inc. New · +8.7K
  • TWO SIGMA INVESTMENTS, LP New · +7.1K
  • Voleon Capital Management New · +23.2K

Most significant sellers

By move score, not size.

  • Holocene Advisors, LP Sold Out · -44.6K
  • Verition Fund Management Sold Out · -11.5K
  • Hudson Bay Capital Management Sold Out · -22.4K
  • LMR Partners Sold Out · -30.0K
  • Voloridge Investment Management Reduced · -166.8K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
RENAISSANCE TECHNOLOGIES LLC 1 382.7K 0 +382.7K — 0.0% New 62
Point72 Asset Management, L.P. 1 1.7M 538.4K +1.18M +219.7% 0.1% Increased 58
D. E. Shaw & Co., Inc. 1 8.7K 0 +8.7K — 0.0% New 58
Holocene Advisors, LP 2 0 44.6K -44.6K -100.0% 0.0% Sold Out 58
TWO SIGMA INVESTMENTS, LP 2 7.1K 0 +7.1K — 0.0% New 57
Verition Fund Management 2 0 11.5K -11.5K -100.0% 0.0% Sold Out 54
Hudson Bay Capital Management 3 0 22.4K -22.4K -100.0% 0.0% Sold Out 53
LMR Partners 3 0 30.0K -30.0K -100.0% 0.0% Sold Out 53
Voleon Capital Management 3 23.2K 0 +23.2K — 0.0% New 51
Trexquant Investment 3 26.8K 0 +26.8K — 0.0% New 51
Voloridge Investment Management 2 9.2K 176.0K -166.8K -94.8% 0.0% Reduced 48
Engineers Gate 4 20.1K 0 +20.1K — 0.0% New 48
Walleye Capital 3 298.6K 19.5K +279.1K +1433.9% 0.1% Increased 47
Balyasny Asset Management L.P. 2 46.7K 148.2K -101.5K -68.5% 0.0% Reduced 45
Squarepoint Ops LLC 2 87.1K 50.6K +36.4K +72.0% 0.0% Increased 44
RTW Investments 1 295.0K 495.0K -200.0K -40.4% 0.1% Reduced 43
Alyeska Investment Group, L.P. 2 350.0K 225.0K +125.0K +55.6% 0.0% Increased 41
Brevan Howard Capital Management 3 136.6K 80.4K +56.2K +69.8% 0.1% Increased 38
Aquatic Capital Management 4 28.6K 73.1K -44.5K -60.9% 0.0% Reduced 35
Jain Global 3 21.0K 43.9K -22.9K -52.2% 0.0% Reduced 34
Quantbot Technologies 4 41.1K 120.8K -79.7K -66.0% 0.0% Reduced 33
AQR Capital Management 3 303.2K 208.8K +94.4K +45.2% 0.0% Increased 33
MILLENNIUM MANAGEMENT LLC 2 922.9K 1.1M -170.5K -15.6% 0.0% Reduced 32
CITADEL ADVISORS LLC 1 799.9K 756.6K +43.3K +5.7% 0.0% Increased 30
Rock Springs Capital Management 3 573.5K 572.5K +1.0K +0.2% 0.8% Increased 26
Ghisallo Capital Management 2 50.0K 50.0K 0 +0.0% 0.0% Unchanged 19

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.