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.

Bain Capital GSS Investment Corp.

CIK 0002064355BCSSBCSS-UNBCSS-WT· quarter ending 2026-06-30

Shares outstanding

58,400,000

as of 2026-08-11 · 10-Q cover page, filed 2026-08-13

Held by 13F filers

6,791,149

selection includes debt or preferreds — no % of shares outstanding

Holders

-3 vs 2026-03-31 · 6 new, 9 exited

Value

$5.2M

shares +1.4% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-13, as of 2026-08-11)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	CUSIP
Class AOrdinary Shares	—	46,900,000	—	—
Common Class B	—	11,500,000	—	—
Not matched to a class			41,475,470	—	G0R78B106

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
G0R78B106	ORD CL A	59	41,475,470	—	—	$425.9M	2 call / 0 put	13DG	holders →
G0R78B122	COMnot common	14	2,334,089	—	—	$24.2M	—	13DG	holders →
G0R78B114	*W EXP 01/01/202not common	42	6,791,149	—	—	$5.2M	2 call / 0 put	prefix	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 (42 of 42 · G0R78B114)

change vs 2026-03-31

#	Filer	Shares / principal	% of class	Value	Change
1	Empyrean Capital Partners, LP	798,000	—	$543K	—
2	Fort Baker Capital Management LP	406,531	—	$276K	—
3	Weiss Asset Management LP	392,734	—	$267K	—
4	Sculptor Capital LP	344,771	—	$250K	—
5	Meteora Capital, LLC	331,796	—	$226K	+68,000 (+25.8%)
6	K2 PRINCIPAL FUND, L.P.	327,717	—	$223K	NEW
7	Alberta Investment Management Corp	320,000	—	$218K	NEW
8	MOORE CAPITAL MANAGEMENT, LP	300,000	—	$204K	—
9	Davidson Kempner Capital Management LP	280,000	—	$190K	—
10	AQR Arbitrage LLC	241,581	—	$164K	+2,935 (+1.2%)
11	Polar Asset Management Partners Inc.	200,000	—	$140K	—
12	ARISTEIA CAPITAL, L.L.C.	199,998	—	$145K	—
13	Lineage Point Capital LP	175,968	—	$120K	+81,968 (+87.2%)
14	Decagon Asset Management LLP	158,463	—	$108K	+18,001 (+12.8%)
15	Shaolin Capital Management LLC	143,401	—	$98K	+17,801 (+14.2%)
16	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND	140,000	—	$95K	—
17	PICTON MAHONEY ASSET MANAGEMENT	140,000	—	$95K	—
18	Periscope Capital Inc.	139,900	—	$98K	—
19	Verition Fund Management LLC	137,022	—	$93K	+8,635 (+6.7%)
20	TORONTO DOMINION BANK	136,749	—	$93K	+55,249 (+67.8%)
21	Linden Advisors LP	119,998	—	$87K	—
22	ADAGE CAPITAL PARTNERS GP, L.L.C.	116,393	—	$79K	-229,014 (-66.3%)
23	Saba Capital Management, L.P.	107,115	—	$78K	—
24	MORGAN STANLEY	102,651	—	$70K	—
25	Centiva Capital, LP	100,100	—	$68K	NEW
26	Jain Global LLC	100,000	—	$68K	+50,000 (+100.0%)
27	BOUSSARD & GAVAUDAN GESTION SAS	100,000	—	$68K	NEW
28	Clear Street Group Inc.	97,550	—	$66K	-801 (-0.8%)
29	Magnetar Financial LLC	90,000	—	$65K	—
30	HGC Investment Management Inc.	80,000	—	$54K	—
31	TENOR CAPITAL MANAGEMENT Co., L.P.	70,000	—	$48K	—
32	BNP PARIBAS FINANCIAL MARKETS	63,060	—	$43K	—
33	BOOTHBAY FUND MANAGEMENT, LLC	54,255	—	$557K	NEW
34	Schonfeld Strategic Advisors LLC	47,475	—	$32K	-2,500 (-5.0%)
35	Radcliffe Capital Management, L.P.	47,082	—	$34K	—
36	HBK INVESTMENTS L P	40,001	—	$27K	—
37	GLAZER CAPITAL, LLC	35,630	—	$24K	-23,098 (-39.3%)
38	Context Capital Management, LLC	30,000	—	$20K	—
39	WOLVERINE ASSET MANAGEMENT LLC	30,000	—	$20K	NEW
40	DLD Asset Management, LP	21,208	—	$14K	—
41	Walleye Capital LLC	20,000	—	$14K	—
42	Mint Tower Capital Management B.V.	4,000	—	$3K	—

Exited since 2026-03-31 (9 filers; largest 9 shown)

Mercuria Capital Strategies, LLC	−309,175
LuminArx Capital Management LP	−200,675
Lighthouse Investment Partners, LLC	−100,000
Boussard & Gavaudan Investment Management LLP	−100,000
CSS LLC/IL	−97,580
Ilex Capital Partners (UK) LLP	−40,000
BERKLEY W R CORP	−20,042
Hudson Bay Capital Management LP	−18,700
PenderFund Capital Management Ltd.	−2,000

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
Amos Meron	SCHEDULE 13G/A	2026-05-15	2026-03-31	4,340,641	9.26%
Empyrean Capital Partners, LP	SCHEDULE 13G/A	2026-05-15	2026-03-31	4,340,641	9.26%
Fort Baker Capital, LLC	SCHEDULE 13G/A	2026-05-15	2026-03-31	3,981,252	8.5%
Fort Baker Capital Management LP	SCHEDULE 13G/A	2026-05-15	2026-03-31	3,981,252	8.5%
Steven Patrick Pigott	SCHEDULE 13G/A	2026-05-15	2026-03-31	3,981,252	8.5%
Adage Capital Management, L.P.	SCHEDULE 13G	2026-02-12	2025-12-31	3,000,000	6.4%
Phillip Gross	SCHEDULE 13G	2026-02-12	2025-12-31	3,000,000	6.4%
Robert Atchinson	SCHEDULE 13G	2026-02-12	2025-12-31	3,000,000	6.4%
Bain Capital GSS Investment Sponsor LLC	SCHEDULE 13G	2025-10-15	2025-10-01	12,370,000	21.18%

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.