Bain Capital GSS Investment Corp. - Class A ordinary shares, par value $0.0001 per share (BCSS)

Q: What does CUSIP G0R78B106 represent in this 13F holders report?

CUSIP G0R78B106 is the security identifier for BCSS - Bain Capital GSS Investment Corp. - Class A ordinary shares, par value $0.0001 per share used to aggregate holder disclosures.

Q: How many institutions held BCSS - Bain Capital GSS Investment Corp. - Class A ordinary shares, par value $0.0001 per share in Q1 2026?

63 institutional investors reported BCSS - Bain Capital GSS Investment Corp. - Class A ordinary shares, par value $0.0001 per share for Q1 2026. Use the holders table for investor-level position and value details.

CUSIP: G0R78B106

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Class A ordinary shares, par value $0.0001 per share
Total 13F shares: 40,172,756
Total 13F value: $406,202,081
Share change: +10,123,220
SEC-reported price per share: $10.11
Number of holders: 63
Value change: +$102,370,619
Number of buys: 25
Number of sells: 12
Shares outstanding: 46,875,173

Security key

G0R78B106

Report period

Q1 2026

Institutions

Top holders

BCSS full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2026 Previous quarter: Q4 2025 Bain Capital GSS Investment Corp. SEC filings Bain Capital GSS Investment Corp. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP G0R78B106

Newer quarter: Q2 2026 Previous quarter: Q4 2025

Recent filing periods:

Q2 2026 Q1 2026 Q4 2025

Ownership snapshot

Top reported holders of BCSS - Bain Capital GSS Investment Corp. - Class A ordinary shares, par value $0.0001 per share (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Bain Capital GSS Investme...

Disclosed value leader

Empyrean Capital Partners...

Comparable rows

15/15

Latest evidence

31 Mar 2026

3/4/5 13D/G 13F Lead comparable stake: 21% 13D/G row: Bain Capital GSS Investment Sponsor LLC Showing 1-6 of 15 holder rows.

Quick read

Bain Capital GSS Investment Sponsor LLC leads the comparable SEC ownership view at 21%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Bain Capital GSS Investment Sponsor LLC's linked filing trail.

Comparable ownership Top 5

Bain Capital GSS Investment Spons... 21%

Empyrean Capital Partners, LP 9.3%

Fort Baker Capital Management LP 8.5%

Adage Capital Management, L.P. 6.4%

ADAGE CAPITAL PARTNERS GP, L.L.C. 6.4%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Bain Capital GSS Investment Sponsor LLC	3/4/5 13D/G 10%+ Owner 3/4/5 13D/G	21% from 13D/G	— 12,340,000 shares mixed-class rows	—	18 Dec 2025
Empyrean Capital Partners, LP	13D/G 13F Company 13D/G 13F	9.3%	$43,891,694 4,340,641 shares	$0	31 Mar 2026
Fort Baker Capital Management LP	13D/G 13F Company 13D/G 13F	8.5%	$40,257,624 3,981,252 shares	+$12,150,400	31 Mar 2026
Adage Capital Management, L.P.	13D/G 13D/G	6.4%	$30,390,000 3,000,000 shares	$0	31 Dec 2025
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	6.4%	$30,240,000 3,000,000 shares	—	31 Dec 2025
Diameter Capital Partners LP	13F Company 13F	4.3%	$20,440,000 2,000,000 shares	—	31 Dec 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q1 2026

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

40,172,756

Rows available

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q1 2026 vs Q4 2025 Across Filers

Q4 2025 holders

Q1 2026 holders

Holder diff

Investor	Q4 2025 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q4 2025 value	Q1 2026 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend