HTFL in the 13F filings

Heartflow Inc · CUSIP 42238D107

Sector · Medical devices and instruments Theme · Healthcare: biopharma and medtech· L3VLUP-defined Theme · Surgical, medical and electromedical devices

Quarter

Q2 2026 Q1 2026 Q4 2025 Q3 2025

Quarter end: 30 Jun 2026; the date the book describes
Filed: 27 Oct 2026; latest of these filings; the earliest 3 Aug 2026
Managers listing it: 22; at least, of 95 tracked, among listed positions
Comparable managers: 91; filed both Q1 2026 and Q2 2026; 3 listed it in both
Shares listed: 24,950,497; combined, among listed positions
Reported value: $722m; combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 15 buyers (opened or added shares) and 13 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -2,634,802.

Managers listing HTFL in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

ActionShare of book at least

22 of 22 holders

				Action		Filing
Wellington Management Group LLP	7,864,226	$231m	under 0.1%	Trimmed	-4,118,057	14 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	4,820,944	$141m	under 0.1%	Trimmed	-576,858	13 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd	2,419,336	$71m	under 0.1%	Added	+238,360	14 Aug 2026 (the filing on sec.gov)
Invesco Ltd	2,298,718	$67m	under 0.1%	Added	+385,628	14 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP	1,721,279	$51m	0.06%	Added	+1,182,928	14 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP	1,924,268	$47m	under 0.1%	Added	+699,942	14 Aug 2026 (the filing on sec.gov)
Millennium Management LLC	922,893	$27m	under 0.1%	Trimmed	-170,524	14 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC	799,883	$23m	under 0.1%	Added	+43,278	2 Sep 2026 (the filing on sec.gov)
MFS Investment Management	498,812	$15m	under 0.1%	New	new	3 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC	382,700	$11m	under 0.1%	New	new	13 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC	303,220	$8.9m	under 0.1%	Added	+94,406	14 Aug 2026 (the filing on sec.gov)
Walleye Capital LLC	298,568	$8.8m	under 0.1%	Added	+279,104	3 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc	238,268	$7.0m	under 0.1%	Added	+206,293	14 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP	136,584	$4.0m	under 0.1%	Added	+56,168	14 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC	106,115	$3.1m	under 0.1%	New	new	27 Oct 2026 (the filing on sec.gov)
Squarepoint Ops LLC	87,052	$2.6m	under 0.1%	Added	+36,441	14 Aug 2026 (the filing on sec.gov)
Balyasny Asset Management LLC	46,722	$1.4m	under 0.1%	Trimmed	-101,478	14 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP	41,128	$1.2m	under 0.1%	Trimmed	-79,719	12 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP	14,765	$433k	under 0.1%	Trimmed	-19,840	14 Aug 2026 (the filing on sec.gov)
Voloridge Investment Management LLC	9,209	$270k	under 0.1%	Trimmed	-166,836	14 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.	8,681	$255k	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP	7,126	$209k	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Point72 Asset Management LPexisting position · 1,721,279 shares now+1,182,928
AllianceBernstein LPexisting position · 1,924,268 shares now+699,942
MFS Investment Managementnew position · 498,812 shares now+498,812
Invesco Ltdexisting position · 2,298,718 shares now+385,628
Renaissance Technologies LLCnew position · 382,700 shares now+382,700

Reductions

Wellington Management Group LLPexisting position · 7,864,226 shares now-4,118,057
Fidelity (FMR LLC)existing position · 4,820,944 shares now-576,858
Millennium Management LLCexisting position · 922,893 shares now-170,524
Voloridge Investment Management LLCexisting position · 9,209 shares now-166,836
Balyasny Asset Management LLCexisting position · 46,722 shares now-101,478

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (5)

Exited (6)

Baillie Gifford & Cowas $26m
Freestone Grove Partners LPwas $8.8m
Jane Street Group LLCwas $2.5m
Holocene Advisors LPwas $1.1m
Hudson Bay Capital Management LPwas $544k
Verition Fund Management LLCwas $280k

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.

6 in Q3 2025 to 4 in Q2 2026

Tracked managers listing it, at least.

the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

HTFL and LLY →HTFL and JNJ →HTFL and VRTX →Choose a stock to compare with HTFL →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own HTFL, latest filings →Back to the 13F Explorer →

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Quarter	Holders	Reported value	Buyers	Sellers
Q3 2025	6	$320m	6	0
Q4 2025	3	$264m	7	11
Q1 2026	5	$383m	20	4
Q2 2026	4	$356m	15	13