MIAX in the 13F filings

Miami Intl HLDGS Inc · CUSIP 59356Q108

Sector · Other financial services Theme · Financial services· L3VLUP-defined

Quarter

Q2 2026 Q1 2026 Q4 2025 Q3 2025

Quarter end: 31 Dec 2025; the date the book describes
Filed: 19 Feb 2026; latest of these filings; the earliest 22 Jan 2026
Managers listing it: 22; at least, of 95 tracked, among listed positions
Comparable managers: 92; filed both Q3 2025 and Q4 2025; 3 listed it in both
Shares listed: 8,227,248; combined, among listed positions
Reported value: $365m; combined, at the quarter end

Among the 92 comparable managers: 15 buyers (opened or added shares) and 12 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +514,015.

Managers listing MIAX in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, 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
Susquehanna International Group LLP	3,284,952	$146m	under 0.1%	Added	+100	17 Feb 2026 (the filing on sec.gov)
Invesco Ltd	1,278,966	$57m	under 0.1%	Added	+820,246	19 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC	638,050	$28m	under 0.1%	Added	+148,452	12 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC	619,580	$27m	under 0.1%	Trimmed	-355,470	17 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP	616,118	$27m	under 0.1%	Added	+32,998	17 Feb 2026 (the filing on sec.gov)
Millennium Management LLC	284,664	$13m	under 0.1%	Added	+126,182	17 Feb 2026 (the filing on sec.gov)
MFS Investment Management	273,908	$12m	under 0.1%	Trimmed	-23,806	22 Jan 2026 (the filing on sec.gov)
Woodline Partners LP	261,111	$12m	under 0.1%	Held	0	17 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC	195,099	$8.7m	under 0.1%	New	new	12 Feb 2026 (the filing on sec.gov)
Soros Fund Management LLC	154,560	$6.9m	0.08%	Added	+50,300	13 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP	140,331	$6.2m	under 0.1%	Added	+90,320	17 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc	130,486	$5.8m	under 0.1%	Trimmed	-268,296	17 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP	101,552	$4.5m	under 0.1%	Added	+60,407	13 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC	100,000	$4.4m	under 0.1%	Trimmed	-117,714	17 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp	56,006	$2.5m	under 0.1%	Added	+10,473	17 Feb 2026 (the filing on sec.gov)
Element Capital Management LLC	27,855	$1.2m	0.59%	New	new	17 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP	23,100	$1.0m	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP	10,970	$487k	under 0.1%	Trimmed	-43,634	17 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP	10,402	$462k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC	9,463	$420k	under 0.1%	Trimmed	-7,668	13 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd	8,600	$382k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	1,475	$65k	under 0.1%	Added	+1,400	17 Feb 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Invesco Ltdexisting position · 1,278,966 shares now+820,246
Renaissance Technologies LLCnew position · 195,099 shares now+195,099
Jane Street Group LLCexisting position · 638,050 shares now+148,452
Millennium Management LLCexisting position · 284,664 shares now+126,182
Two Sigma Investments LPexisting position · 140,331 shares now+90,320

Reductions

Citadel Advisors LLCexisting position · 619,580 shares now-355,470
T. Rowe Price Associates Incexisting position · 130,486 shares now-268,296
Schonfeld Strategic Advisors LLCexisting position · 100,000 shares now-117,714
ExodusPoint Capital Management LPexisting position · 10,970 shares now-43,634
MFS Investment Managementexisting position · 273,908 shares now-23,806

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)

Freestone Grove Partners LPwas $5.0m
Marshall Wace LLPwas $3.1m
Davidson Kempner Capital Management LPwas $1.0m
D. E. Shaw & Co.was $1.0m
Man Group PLCwas $443k
Squarepoint Ops LLCwas $415k

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.

5 in Q3 2025 to 3 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.

MIAX and V →MIAX and AXP →MIAX and BAC →Choose a stock to compare with MIAX →

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

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Quarter	Holders	Reported value	Buyers	Sellers
Q3 2025	5	$30m	5	0
Q4 2025	3	$20m	15	12
Q1 2026	3	$15m	21	7
Q2 2026	3	$97m	12	15