MNTN in the 13F filings

MNTN Inc · CUSIP 55318A108

Quarter

Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025

Quarter end: 30 Jun 2026; the date the book describes
Filed: 2 Sep 2026; latest of these filings; the earliest 3 Aug 2026
Managers listing it: 17; at least, of 95 tracked, among listed positions
Comparable managers: 91; filed both Q1 2026 and Q2 2026; 2 listed it in both
Shares listed: 12,450,483; combined, among listed positions
Reported value: $115m; 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: 8 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -792,228.

Managers listing MNTN 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

17 of 17 holders

				Action		Filing
Wellington Management Group LLP	5,630,486	$52m	under 0.1%	Trimmed	-578,702	14 Aug 2026 (the filing on sec.gov)
Fidelity (FMR LLC)	3,142,100	$29m	under 0.1%	Added	+317,176	13 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.	1,157,448	$11m	under 0.1%	Added	+681,361	14 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC	692,998	$6.4m	under 0.1%	Added	+637,003	13 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC	541,761	$5.0m	under 0.1%	Trimmed	-88,958	2 Sep 2026 (the filing on sec.gov)
Man Group PLC	341,836	$3.1m	under 0.1%	Added	+73,022	14 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC	214,589	$2.0m	under 0.1%	Trimmed	-431,628	13 Aug 2026 (the filing on sec.gov)
Walleye Capital LLC	178,836	$1.6m	under 0.1%	New	new	3 Aug 2026 (the filing on sec.gov)
Balyasny Asset Management LLC	178,624	$1.6m	under 0.1%	Trimmed	-31,611	14 Aug 2026 (the filing on sec.gov)
Millennium Management LLC	165,462	$1.5m	under 0.1%	Trimmed	-466,635	14 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP	60,457	$556k	under 0.1%	Trimmed	-145,163	14 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc	38,513	$355k	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
PDT Partners LLC	36,848	$339k	under 0.1%	Held	0	14 Aug 2026 (the filing on sec.gov)
Invesco Ltd	25,486	$234k	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Tiger Global Management LLC	20,000	$184k	under 0.1%	Held	0	14 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP	13,339	$123k	under 0.1%	Trimmed	-491,999	14 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP	11,700	$103k	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

D. E. Shaw & Co.existing position · 1,157,448 shares now+681,361
Acadian Asset Management LLCexisting position · 692,998 shares now+637,003
Fidelity (FMR LLC)existing position · 3,142,100 shares now+317,176
Walleye Capital LLCnew position · 178,836 shares now+178,836
Man Group PLCexisting position · 341,836 shares now+73,022

Reductions

Wellington Management Group LLPexisting position · 5,630,486 shares now-578,702
Susquehanna International Group LLPexisting position · 13,339 shares now-491,999
Millennium Management LLCexisting position · 165,462 shares now-466,635
Renaissance Technologies LLCexisting position · 214,589 shares now-431,628
Point72 Asset Management LPexisting position · 60,457 shares now-145,163

New positions and exits

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

New (4)

Exited (8)

Marshall Wace LLPwas $2.5m
Brevan Howard Capital Management LPwas $616k
Tudor Investment Corpwas $460k
Schonfeld Strategic Advisors LLCwas $455k
Jane Street Group LLCwas $198k
Hudson Bay Capital Management LPwas $183k
Arrowstreet Capital LPwas $162k
Quantbot Technologies LPwas $33k

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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Illustrative figures. Default values are plausible starting points chosen so a model has somewhere to begin. They are not data, not a view on any company, and not calibrated to anything. Outputs move with whatever you type in.

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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