MNTN in the 13F filings

MNTN Inc · CUSIP 55318A108

Quarter

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025

Quarter end: 31 Mar 2026; the date the book describes
Filed: 15 May 2026; latest of these filings; the earliest 12 May 2026
Managers listing it: 21; 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: 13,242,711; combined, among listed positions
Reported value: $117m; combined, at the quarter end

Among the 91 comparable managers: 17 buyers (opened or added shares) and 8 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,496,342.

Managers listing MNTN 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.

ActionShare of book at least

21 of 21 holders

				Action		Filing
Wellington Management Group LLP	6,209,188	$55m	under 0.1%	Added	+478,465	15 May 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	2,824,924	$25m	under 0.1%	Added	+1,957	15 May 2026 (the filing on sec.gov)
Renaissance Technologies LLC	646,217	$5.7m	under 0.1%	Added	+187,028	14 May 2026 (the filing on sec.gov)
Millennium Management LLC	632,097	$5.6m	under 0.1%	Added	+239,565	15 May 2026 (the filing on sec.gov)
Citadel Advisors LLC	630,719	$5.5m	under 0.1%	Added	+78,563	15 May 2026 (the filing on sec.gov)
Susquehanna International Group LLP	505,338	$4.4m	under 0.1%	Added	+460,772	15 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.	476,087	$4.2m	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Marshall Wace LLP	281,112	$2.5m	under 0.1%	Added	+248,026	15 May 2026 (the filing on sec.gov)
Man Group PLC	268,814	$2.4m	under 0.1%	Added	+143,500	15 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC	210,235	$1.9m	under 0.1%	New	new	15 May 2026 (the filing on sec.gov)
Point72 Asset Management LP	205,620	$1.8m	under 0.1%	Added	+6,441	15 May 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP	70,007	$616k	under 0.1%	Added	+55,495	15 May 2026 (the filing on sec.gov)
Acadian Asset Management LLC	55,995	$490k	under 0.1%	Added	+51,284	13 May 2026 (the filing on sec.gov)
Tudor Investment Corp	52,270	$460k	under 0.1%	Trimmed	-17,861	15 May 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC	51,674	$455k	under 0.1%	Added	+31,635	15 May 2026 (the filing on sec.gov)
PDT Partners LLC	36,848	$324k	under 0.1%	Added	+13,121	15 May 2026 (the filing on sec.gov)
Jane Street Group LLC	22,548	$198k	under 0.1%	Trimmed	-569,320	12 May 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP	20,841	$183k	under 0.1%	Added	+7,405	13 May 2026 (the filing on sec.gov)
Tiger Global Management LLC	20,000	$176k	under 0.1%	Held	0	15 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP	18,415	$162k	under 0.1%	New	new	14 May 2026 (the filing on sec.gov)
Quantbot Technologies LP	3,762	$33k	under 0.1%	Trimmed	-28,148	13 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

Wellington Management Group LLPexisting position · 6,209,188 shares now+478,465
D. E. Shaw & Co.new position · 476,087 shares now+476,087
Susquehanna International Group LLPexisting position · 505,338 shares now+460,772
Marshall Wace LLPexisting position · 281,112 shares now+248,026
Millennium Management LLCexisting position · 632,097 shares now+239,565

Reductions

Jane Street Group LLCexisting position · 22,548 shares now-569,320
Quantbot Technologies LPexisting position · 3,762 shares now-28,148
Tudor Investment Corpexisting position · 52,270 shares now-17,861

New positions and exits

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

New (3)

Exited (5)

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.

3 in Q2 2025 to 2 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.

MNTN and V →MNTN and MA →MNTN and MCO →Choose a stock to compare with MNTN →

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

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Quarter	Holders	Reported value	Buyers	Sellers
Q2 2025	3	$5.3m	3	0
Q3 2025	3	$7.0m	2	0
Q4 2025	3	$2.9m	19	5
Q1 2026	2	$500k	17	8
Q2 2026	2	$523k	8	15