L3VLUP
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 12 May 2026
Managers listing it
25
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 2 listed it in both
Shares listed
3,550,256
combined, among listed positions
Reported value
$74m
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: 18 buyers (opened or added shares) and 6 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +478,174.

Managers listing HSTM in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

25 of 25 holders

ActionFiling
Two Sigma Investments LP844,420$17munder 0.1%Added+624,86515 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC477,848$9.9munder 0.1%Added+2,38014 May 2026 (the filing on sec.gov)
First Eagle Investment Management LLC425,698$8.8munder 0.1%Added+12,00014 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP377,945$7.8munder 0.1%Added+65,80614 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC348,730$7.2munder 0.1%Trimmed-498,77413 May 2026 (the filing on sec.gov)
Invesco Ltd177,679$3.7munder 0.1%Added+25,98812 May 2026 (the filing on sec.gov)
Millennium Management LLC175,630$3.6munder 0.1%Added+111,12315 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)175,150$3.6munder 0.1%Trimmed-29,74815 May 2026 (the filing on sec.gov)
Jane Street Group LLC95,704$2.0munder 0.1%Trimmed-1,18312 May 2026 (the filing on sec.gov)
Citadel Advisors LLC78,765$1.6munder 0.1%Added+52,97415 May 2026 (the filing on sec.gov)
AQR Capital Management LLC58,842$1.2munder 0.1%Added+27,75815 May 2026 (the filing on sec.gov)
Quantbot Technologies LP54,180$1.1munder 0.1%Added+49,97413 May 2026 (the filing on sec.gov)
Walleye Capital LLC33,963$703kunder 0.1%Added+1,29213 May 2026 (the filing on sec.gov)
Marshall Wace LLP32,376$671kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc29,536$612kunder 0.1%Added+4,23915 May 2026 (the filing on sec.gov)
AllianceBernstein LP23,300$538kunder 0.1%Trimmed-88115 May 2026 (the filing on sec.gov)
Verition Fund Management LLC22,501$466kunder 0.1%Trimmed-27,44915 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP21,763$451kunder 0.1%Added+12,32015 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC20,326$421kunder 0.1%Added+8,78227 Oct 2026 (the filing on sec.gov)
Balyasny Asset Management LLC15,033$311kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.13,634$282kunder 0.1%Added+3,73015 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP12,723$263kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC12,672$262kunder 0.1%Newnew15 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd10,946$227kunder 0.1%Held018 May 2026 (the filing on sec.gov)
Man Group PLC10,892$226kunder 0.1%Trimmed-39,82615 May 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

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

Exited (0)

No exit shown by a manager’s own filing.

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.
2 in Q3 2024 to 2 in Q2 2026

Tracked managers listing it, at least.

012320142020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
HSTM by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20131$17mn.a.n.a.
Q1 20142$35mn.a.n.a.
Q2 20141$45mn.a.n.a.
Q3 20142$41mn.a.n.a.
Q4 20141$28mn.a.n.a.
Q2 20181$3.2mn.a.n.a.
Q3 20181$5.4mn.a.n.a.
Q4 20182$9.1mn.a.n.a.
Q2 20191$3.3mn.a.n.a.
Q1 20203$8.1mn.a.n.a.
Q2 20202$9.7mn.a.n.a.
Q3 20201$8.6mn.a.n.a.
Q4 20201$11mn.a.n.a.
Q1 20211$9.1mn.a.n.a.
Q2 20211$13mn.a.n.a.
Q3 20211$15mn.a.n.a.
Q4 20211$14mn.a.n.a.
Q1 20221$13mn.a.n.a.
Q2 20222$17mn.a.n.a.
Q3 20222$19mn.a.n.a.
Q4 20222$26mn.a.n.a.
Q1 20232$28mn.a.n.a.
Q2 20232$29mn.a.n.a.
Q3 20232$24mn.a.n.a.
Q4 20232$28m11
Q1 20242$30m11
Q2 20242$32m11
Q3 20242$38m20
Q4 20242$43m11
Q1 20252$37m02
Q2 20252$32m11
Q3 20252$32m11
Q4 20252$29m174
Q1 20261$8.8m186
Q2 20262$32m815

Compare with…

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

HSTM and GOOGL →HSTM and META →HSTM and SPCX →Choose a stock to compare with HSTM →

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 HSTM, latest filings →Back to the 13F Explorer →