MNTN in the 13F filings

MNTN Inc · CUSIP 55318A108

Quarter

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025

Quarter end: 31 Dec 2025; the date the book describes
Filed: 17 Feb 2026; latest of these filings; the earliest 10 Feb 2026
Managers listing it: 24; at least, of 95 tracked, among listed positions
Comparable managers: 92; filed both Q3 2025 and Q4 2025; 2 listed it in both
Shares listed: 11,808,871; combined, among listed positions
Reported value: $141m; combined, at the quarter end

Among the 92 comparable managers: 19 buyers (opened or added shares) and 5 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +1,595,090.

Managers listing MNTN 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

24 of 24 holders

				Action		Filing
Wellington Management Group LLP	5,730,723	$68m	under 0.1%	Added	+385,421	17 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	2,822,967	$34m	under 0.1%	Trimmed	-787,560	17 Feb 2026 (the filing on sec.gov)
Jane Street Group LLC	591,868	$7.1m	under 0.1%	New	new	12 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC	552,156	$6.6m	under 0.1%	Added	+312,330	17 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC	459,189	$5.5m	under 0.1%	Added	+338,189	12 Feb 2026 (the filing on sec.gov)
Millennium Management LLC	392,532	$4.7m	under 0.1%	Added	+143,192	17 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP	199,621	$2.4m	under 0.1%	Trimmed	-26,481	17 Feb 2026 (the filing on sec.gov)
Point72 Asset Management LP	199,179	$2.4m	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP	158,598	$1.9m	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Man Group PLC	125,314	$1.5m	under 0.1%	Added	+110,416	17 Feb 2026 (the filing on sec.gov)
Walleye Capital LLC	112,739	$1.3m	under 0.1%	Added	+62,739	13 Feb 2026 (the filing on sec.gov)
Winton Group Ltd	73,748	$881k	under 0.1%	New	new	11 Feb 2026 (the filing on sec.gov)
Tudor Investment Corp	70,131	$837k	under 0.1%	Trimmed	-44,440	17 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP	62,502	$746k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Verition Fund Management LLC	51,617	$616k	under 0.1%	New	new	13 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP	44,566	$532k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP	33,086	$395k	under 0.1%	New	new	13 Feb 2026 (the filing on sec.gov)
Quantbot Technologies LP	31,910	$381k	under 0.1%	Added	+22,760	10 Feb 2026 (the filing on sec.gov)
PDT Partners LLC	23,727	$283k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC	20,039	$239k	under 0.1%	Trimmed	-62,096	17 Feb 2026 (the filing on sec.gov)
Tiger Global Management LLC	20,000	$239k	under 0.1%	Held	0	17 Feb 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP	14,512	$173k	under 0.1%	New	new	17 Feb 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP	13,436	$160k	under 0.1%	New	new	13 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC	4,711	$55k	under 0.1%	Added	+2,341	10 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

Jane Street Group LLCnew position · 591,868 shares now+591,868
Wellington Management Group LLPexisting position · 5,730,723 shares now+385,421
Renaissance Technologies LLCexisting position · 459,189 shares now+338,189
Citadel Advisors LLCexisting position · 552,156 shares now+312,330
Point72 Asset Management LPnew position · 199,179 shares now+199,179

Reductions

Fidelity (FMR LLC)existing position · 2,822,967 shares now-787,560
Schonfeld Strategic Advisors LLCexisting position · 20,039 shares now-62,096
Tudor Investment Corpexisting position · 70,131 shares now-44,440
Freestone Grove Partners LPexisting position · 199,621 shares now-26,481

New positions and exits

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

New (11)

Jane Street Group LLC$7.1m
Point72 Asset Management LP$2.4m
Two Sigma Investments LP$1.9m
Winton Group Ltd$881k
Two Sigma Advisers LP$746k
Verition Fund Management LLC$616k
Susquehanna International Group LLP$532k
Marshall Wace LLP$395k
PDT Partners LLC$283k
Brevan Howard Capital Management LP$173k

Exited (1)

Soros Fund Management LLCwas $2.4m

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