Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Berto Acquisition Corp.

CIK 0002033122TACOTACOUTACOW· quarter ending 2026-06-30

Shares outstanding

37,518,750

as of 2026-08-14 · 10-Q cover page, filed 2026-08-14

Held by 13F filers

28,530,922

76.0% of shares outstanding

Holders

+2 vs 2026-03-31 · 8 new, 6 exited

Value

$299.1M

shares +4.4% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-14, as of 2026-08-14)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	TACO · NASDAQ	37,518,750	28,530,922	76.0%	63	G1051H101

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
G1051H101	COM	63	28,530,922	37,518,750	76.0%	$299.1M	—	13DG	holders →
G1051H119	COMnot common	48	12,243,895 $244K principal	—	—	$9.2M	1 call / 0 put	NPORT	holders →
G1051H127	UNIT 99/99/9999not common	4	304,472	—	—	$3.3M	—	NPORT	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (63 of 63 · G1051H101)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	Magnetar Financial LLC	1,650,000	4.40%	$17.3M	—
2	Centiva Capital, LP	1,538,392	4.10%	$16.1M	-252,802 (-14.1%)
3	Linden Advisors LP	1,500,000	4.00%	$15.7M	—
4	GLAZER CAPITAL, LLC	1,440,092	3.84%	$15.1M	-138,290 (-8.8%)
5	Governors Lane LP	1,350,000	3.60%	$14.2M	NEW
6	Hudson Bay Capital Management LP	1,266,599	3.38%	$13.3M	—
7	BERKLEY W R CORP	1,225,999	3.27%	$12.9M	-596,599 (-32.7%)
8	Polar Asset Management Partners Inc.	1,100,000	2.93%	$11.5M	—
9	AQR Arbitrage LLC	1,080,090	2.88%	$11.3M	+6,153 (+0.6%)
10	MOORE CAPITAL MANAGEMENT, LP	1,000,000	2.67%	$10.5M	—
11	Verbena Value LP	897,745	2.39%	$9.4M	—
12	TENOR CAPITAL MANAGEMENT Co., L.P.	800,000	2.13%	$8.4M	—
13	TWO SIGMA INVESTMENTS, LP	799,248	2.13%	$8.4M	—
14	LMR Partners LLP	772,757	2.06%	$8.1M	—
15	Verition Fund Management LLC	745,812	1.99%	$7.8M	+554,911 (+290.7%)
16	Westchester Capital Management, LLC	703,632	1.88%	$7.4M	—
17	Harraden Circle Investments, LLC	649,284	1.73%	$6.8M	NEW
18	HIGHBRIDGE CAPITAL MANAGEMENT LLC	619,514	1.65%	$6.5M	+119,514 (+23.9%)
19	Crossingbridge Advisors, LLC	615,000	1.64%	$6.5M	-20,000 (-3.1%)
20	WOLVERINE ASSET MANAGEMENT LLC	597,648	1.59%	$6.3M	-302,292 (-33.6%)
21	D. E. Shaw & Co., Inc.	534,490	1.42%	$5.6M	+175,000 (+48.7%)
22	MIZUHO SECURITIES USA LLC	517,139	1.38%	$5.3M	+175,096 (+51.2%)
23	SkyView Investment Advisors, LLC	433,649	1.16%	$4.5M	NEW
24	Mint Tower Capital Management B.V.	410,668	1.09%	$4.3M	—
25	GOLDMAN SACHS GROUP INC	405,124	1.08%	$4.2M	—
26	Radcliffe Capital Management, L.P.	392,553	1.05%	$4.1M	+20,789 (+5.6%)
27	First Trust Capital Management L.P.	352,000	0.94%	$3.7M	—
28	TORONTO DOMINION BANK	351,000	0.94%	$3.7M	+318,390 (+976.4%)
29	ARISTEIA CAPITAL, L.L.C.	348,250	0.93%	$3.7M	+10,600 (+3.1%)
30	DLD Asset Management, LP	300,008	0.80%	$3.1M	+131,202 (+77.7%)
31	Parallax Volatility Advisers, L.P.	294,700	0.79%	$3.1M	-336,666 (-53.3%)
32	Periscope Capital Inc.	275,000	0.73%	$2.9M	—
33	Mercuria Capital Strategies, LLC	270,908	0.72%	$2.8M	—
34	CSS LLC/IL	270,809	0.72%	$2.8M	-94,072 (-25.8%)
35	Lineage Point Capital LP	268,870	0.72%	$2.8M	-210,632 (-43.9%)
36	Alberta Investment Management Corp	250,000	0.67%	$2.6M	—
37	MILLENNIUM MANAGEMENT LLC	250,000	0.67%	$2.6M	NEW
38	Context Capital Management, LLC	250,000	0.67%	$2.6M	—
39	Shaolin Capital Management LLC	248,281	0.66%	$2.6M	-151,719 (-37.9%)
40	Massar Capital Management, LP	183,942	0.49%	$1.9M	+3,942 (+2.2%)
41	RIVERNORTH CAPITAL MANAGEMENT, LLC	173,606	0.46%	$1.8M	-300 (-0.2%)
42	SONA ASSET MANAGEMENT (US) LLC	165,606	0.44%	$1.7M	—
43	Schonfeld Strategic Advisors LLC	150,000	0.40%	$1.6M	-17,873 (-10.6%)
44	Wealthspring Capital LLC	148,765	0.40%	$1.6M	—
45	Jefferies Financial Group Inc.	130,774	0.35%	$1.4M	—
46	BlueCrest Capital Management Ltd	100,000	0.27%	$1.0M	—
47	O'Connor Alternative Investments LLC	100,000	0.27%	$1.0M	—
48	GRITSTONE ASSET MANAGEMENT LLC	98,853	0.26%	$1.0M	—
49	HEIGHTS CAPITAL MANAGEMENT, INC	95,473	0.25%	$1.0M	-4,527 (-4.5%)
50	StoneX Group Inc.	65,410	0.17%	$684K	NEW
51	GEODE CAPITAL MANAGEMENT, LLC	51,962	0.14%	$545K	-5,458 (-9.5%)
52	LEVIN CAPITAL STRATEGIES, L.P.	50,085	0.13%	$525K	+40,085 (+400.8%)
53	BNP PARIBAS FINANCIAL MARKETS	46,008	0.12%	$483K	—
54	Cannon Global Investment Management, LLC	42,100	0.11%	$442K	+400 (+1.0%)
55	HRT FINANCIAL LP	35,512	0.09%	$372K	NEW
56	Tuttle Capital Management, LLC	30,577	0.08%	$321K	-9,423 (-23.6%)
57	ABC ARBITRAGE SA	30,000	0.08%	$315K	—
58	Clear Street Group Inc.	24,327	0.06%	$255K	-81,074 (-76.9%)
59	READYSTATE ASSET MANAGEMENT LP	18,398	0.05%	$193K	—
60	Rangeley Capital, LLC	11,538	0.03%	$121K	NEW
61	FNY Investment Advisers, LLC	2,053	0.01%	$21K	-347 (-14.5%)
62	UBS Group AG	653	0.00%	$7K	NEW
63	MORGAN STANLEY	19	0.00%	$199	-3 (-13.6%)

Exited since 2026-03-31 (6 filers; largest 6 shown)

Logan Stone Capital, LLC	−323,861
BANK OF MONTREAL /CAN/	−260,000
K2 PRINCIPAL FUND, L.P.	−208,300
CITADEL ADVISORS LLC	−60,584
Diametric Capital, LP	−53,332
PRELUDE CAPITAL MANAGEMENT, LLC	−13,500

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Berto Acquisition Sponsor LLC	SCHEDULE 13G	2025-08-14	2025-06-30	2,688,300	7.2%
Harry L. You	SCHEDULE 13G	2025-08-14	2025-06-30	5,089,500	13.6%
Robert You	SCHEDULE 13G	2025-08-14	2025-06-30	2,101,050	5.6%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.