BLLN · BillionToOne, Inc. · Shareholders & Ownership

$103.50 +2.47 (+2.44%) At close · Oct 20

Market Cap

$4.86B

47.19M

Volume · Oct 20 398.77K Avg daily vol (3M) 666.88K

Every disclosed holder of BLLN in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns BLLN

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	160	15,270,536	32.36%	Yes
Insiders (Forms 3, 4, 5)	0	0	0.00%	No
13D/G-only blocks	4	18,489,370	39.18%	Yes
Remaining	—	13,427,132	28.46%	Rest
Registered funds (N-PORT, not summed)	106	6,267,366	13.28%	No

Shares outstanding: 47,187,038, the issuer's latest cover-page count restated onto today's split basis.

Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of BLLN

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Humming Bird Ventures Management NV Insider CIK 2099044 · Nov 7, 2025 10% Owner, issuer-wide, not summed	2,580,833	5.47%	—	Nov 7, 2025	10% Owner, issuer-wide, not summed
1.1	Hummingbird Ventures Management NV 13D CIK 2099044 · Unknown · Nov 6, 2025	7,887,237	16.71%	—	Nov 6, 2025
2	ADAMS STREET PARTNERS LLC 13F CIK 1193586 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,711,430	3.63%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
3	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,010,322	2.14%	+272,804	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	T. Rowe Price Health Sciences Fund, Inc. Fund S000002088 · Registered fund · Jun 30, 2026 T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed	377,575	0.80%	+113,100	Jun 30, 2026	T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed
3.2	T. Rowe Price New Horizons Fund, Inc. Fund S000002106 · Registered fund · Jun 30, 2026 T. ROWE PRICE NEW HORIZONS FUND, INC., not summed	138,948	0.29%	-62	Jun 30, 2026	T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
3.3	T. Rowe Price Integrated U.S. Small-Cap Growth Equity Fund Fund S000002074 · Registered fund · Jun 30, 2026 T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed	110,110	0.23%	0	Jun 30, 2026	T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
3.4	T. Rowe Price Small-Cap Stock Fund, Inc. Fund S000002120 · Registered fund · Jun 30, 2026 T. ROWE PRICE SMALL-CAP STOCK FUND, INC., not summed	26,190	0.06%	—	Jun 30, 2026	T. ROWE PRICE SMALL-CAP STOCK FUND, INC., not summed
3.5	T. Rowe Price Health Sciences Portfolio Fund S000002083 · Registered fund · Jun 30, 2026 T. ROWE PRICE EQUITY SERIES, INC., not summed	24,722	0.05%	+8,500	Jun 30, 2026	T. ROWE PRICE EQUITY SERIES, INC., not summed
4	BAILLIE GIFFORD & CO 13F CIK 1088875 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	901,420	1.91%	-358,573	Jun 30, 2026	carried, not yet filed for the newest quarter
5	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	840,970	1.78%	+689,757	Jun 30, 2026	carried, not yet filed for the newest quarter
6	Invesco Ltd. 13F CIK 914208 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	835,614	1.77%	+429,102	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	Invesco Discovery Fund Fund S000064618 · Registered fund · May 31, 2026 AIM Counselor Series Trust (Invesco Counselor Series Trust), not summed	190,331	0.40%	+7,983	May 31, 2026	AIM Counselor Series Trust (Invesco Counselor Series Trust), not summed
6.2	Invesco Small Cap Growth Fund Fund S000000476 · Registered fund · Jun 30, 2026 AIM Growth Series (Invesco Growth Series), not summed	83,090	0.18%	+22,424	Jun 30, 2026	AIM Growth Series (Invesco Growth Series), not summed
6.3	Invesco Health Care Fund Fund S000000235 · Registered fund · Jul 31, 2026 AIM Investment Funds (Invesco Investment Funds), not summed	33,606	0.07%	+18,838	Jul 31, 2026	AIM Investment Funds (Invesco Investment Funds), not summed
6.4	Invesco V.I. Health Care Fund Fund S000000193 · Registered fund · Jun 30, 2026 AIM Variable Insurance Funds (Invesco Variable Insurance Funds), not summed	4,385	0.01%	+2,464	Jun 30, 2026	AIM Variable Insurance Funds (Invesco Variable Insurance Funds), not summed
7	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	799,468	1.69%	+617,005	Jun 30, 2026	carried, not yet filed for the newest quarter
8	NEUBERGER BERMAN GROUP LLC 13F CIK 1465109 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	764,215	1.62%	+55,001	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	Neuberger Small Cap Growth Fund Fund S000007839 · Registered fund · May 31, 2026 NEUBERGER BERMAN EQUITY FUNDS, not summed	27,254	0.06%	+7,089	May 31, 2026	NEUBERGER BERMAN EQUITY FUNDS, not summed
9	BAMCO INC /NY/ 13F CIK 1017918 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	742,093	1.57%	+608	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	BARON DISCOVERY FUND Fund S000042178 · Registered fund · Jun 30, 2026 BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND), not summed	286,830	0.61%	0	Jun 30, 2026	BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND), not summed
9.2	BARON OPPORTUNITY FUND Fund S000000585 · Registered fund · Jun 30, 2026 BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND), not summed	87,803	0.19%	0	Jun 30, 2026	BARON INVESTMENT FUNDS TRUST (f/k/a BARON ASSET FUND), not summed
9.3	Baron Global Opportunity Fund Fund S000036767 · Registered fund · Jun 30, 2026 BARON SELECT FUNDS, not summed	79,967	0.17%	+21,673	Jun 30, 2026	BARON SELECT FUNDS, not summed
9.4	Baron Health Care Fund Fund S000061847 · Registered fund · Jun 30, 2026 BARON SELECT FUNDS, not summed	27,000	0.06%	0	Jun 30, 2026	BARON SELECT FUNDS, not summed
10	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	724,088	1.53%	+597,996	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
11	VANGUARD SMALL-CAP INDEX FUND Fund S000002845 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	522,864	1.11%	+430,658	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
12	WASATCH ADVISORS LP 13F CIK 814133 · Registered investment adviser · Sep 30, 2026	507,258	1.08%	-10,826	Sep 30, 2026
12.1	Wasatch Small Cap Growth Fund Fund S000000887 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	204,419	0.43%	+27,240	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
12.2	Wasatch Ultra Growth Fund Fund S000000879 · Registered fund · Jun 30, 2026 WASATCH FUNDS TRUST, not summed	88,572	0.19%	—	Jun 30, 2026	WASATCH FUNDS TRUST, not summed
13	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	425,032	0.90%	+425,032	Jun 30, 2026	carried, not yet filed for the newest quarter
14	FULLER & THALER ASSET MANAGEMENT, INC. 13F CIK 1082327 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	418,565	0.89%	+418,565	Jun 30, 2026	carried, not yet filed for the newest quarter
15	EMERALD ADVISERS, LLC 13F CIK 1015083 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	375,858	0.80%	+136,296	Jun 30, 2026	carried, not yet filed for the newest quarter
16	NEXT CENTURY GROWTH INVESTORS LLC 13F CIK 1134007 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	364,467	0.77%	+273,903	Jun 30, 2026	carried, not yet filed for the newest quarter
17	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	344,287	0.73%	+222,683	Jun 30, 2026	carried, not yet filed for the newest quarter
18	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	340,371	0.72%	+57,231	Jun 30, 2026	carried, not yet filed for the newest quarter
19	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	320,612	0.68%	+100,577	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	Columbia Acorn Fund Fund S000009184 · Registered fund · Jun 30, 2026 COLUMBIA ACORN TRUST, not summed	137,395	0.29%	-28,810	Jun 30, 2026	COLUMBIA ACORN TRUST, not summed
19.2	Columbia Variable Portfolio - Acorn Fund Fund S000008981 · Registered fund · Jun 30, 2026 COLUMBIA FUNDS VARIABLE SERIES TRUST, not summed	26,565	0.06%	-5,345	Jun 30, 2026	COLUMBIA FUNDS VARIABLE SERIES TRUST, not summed
19.3	Columbia Variable Portfolio - Small Company Growth Fund Fund S000010658 · Registered fund · Jun 30, 2026 COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed	6,940	0.01%	—	Jun 30, 2026	COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed
20	OBERWEIS ASSET MANAGEMENT INC/ 13F CIK 937886 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	299,030	0.63%	+299,030	Jun 30, 2026	carried, not yet filed for the newest quarter
20.1	Oberweis Small-Cap Opportunities Fund Fund S000010232 · Registered fund · Jun 30, 2026 OBERWEIS FUNDS, not summed	264,300	0.56%	—	Jun 30, 2026	OBERWEIS FUNDS, not summed
21	FULLERTHALER BEHAVIORAL SMALL-CAP GROWTH Fund S000060086 · Registered fund · Jun 30, 2026 Capitol Series Trust, not summed	275,000	0.58%	—	Jun 30, 2026	Capitol Series Trust, not summed
22	WELLS FARGO & COMPANY/MN 13F CIK 72971 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	271,554	0.58%	+270,446	Jun 30, 2026	carried, not yet filed for the newest quarter
23	ALLIANCEBERNSTEIN L.P. 13F CIK 1109448 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	262,103	0.56%	+38,852	Jun 30, 2026	carried, not yet filed for the newest quarter
23.1	AB Small Cap Growth Portfolio Fund S000010309 · Registered fund · Jun 30, 2026 AB CAP FUND, INC., not summed	134,048	0.28%	+28,286	Jun 30, 2026	AB CAP FUND, INC., not summed
23.2	AB Small Cap Growth Portfolio Fund S000010435 · Registered fund · Jun 30, 2026 AB VARIABLE PRODUCTS SERIES FUND, INC., not summed	2,420	0.01%	+361	Jun 30, 2026	AB VARIABLE PRODUCTS SERIES FUND, INC., not summed
24	ADAMS STREET PRIVATE EQUITY NAVIGATOR FUND LLC Fund · Registered fund · Jun 30, 2026 ADAMS STREET PRIVATE EQUITY NAVIGATOR FUND LLC, not summed	246,939	0.52%	—	Jun 30, 2026	ADAMS STREET PRIVATE EQUITY NAVIGATOR FUND LLC, not summed
25	Napean Trading & Investment Co (Singapore) PTE Ltd 13F CIK 2011874 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	233,333	0.49%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
26	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 13F CIK 861177 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	223,933	0.47%	-16,654	Jun 30, 2026	carried, not yet filed for the newest quarter
27	EMERALD MUTUAL FUND ADVISERS TRUST 13F CIK 1352895 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	203,990	0.43%	+71,784	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	Emerald Growth Fund Fund S000036390 · Registered fund · Apr 30, 2026 FINANCIAL INVESTORS TRUST, not summed	61,081	0.13%	+5,525	Apr 30, 2026	FINANCIAL INVESTORS TRUST, not summed
28	Sakakibara Shan Riku Insider CIK 2088547 · Sep 10, 2026 Chief Product Officer, issuer-wide, not summed	196,500	0.42%	-3,500	Sep 10, 2026	Chief Product Officer, issuer-wide, not summed
29	VANGUARD SMALL-CAP VALUE INDEX FUND Fund S000002847 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	165,569	0.35%	+106,617	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
30	VANGUARD SMALL-CAP GROWTH INDEX FUND Fund S000002846 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	149,863	0.32%	+124,190	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
31	Atay Oguzhan Insider CIK 2088549 · Oct 15, 2026 Director, See Remarks, issuer-wide, not summed	149,168	0.32%	-2,667	Oct 15, 2026	Director, See Remarks, issuer-wide, not summed
31.1	Oguzhan Atay 13G CIK 2088549 · Unknown · Dec 31, 2025 Rule 13d-1(d), exempt investor	3,206,861	6.80%	—	Dec 31, 2025	Rule 13d-1(d), exempt investor
32	JPMorgan Small Cap Growth Fund Fund S000003859 · Registered fund · Jun 30, 2026 JPMorgan Trust II, not summed	138,412	0.29%	-7,273	Jun 30, 2026	JPMorgan Trust II, not summed
33	SmallCap Growth Fund I Fund S000007175 · Registered fund · Jul 31, 2026 Principal Funds, Inc, not summed	130,577	0.28%	+46,394	Jul 31, 2026	Principal Funds, Inc, not summed
34	Penn Capital Management Company, LLC 13F CIK 1158202 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	129,602	0.27%	+3,267	Jun 30, 2026	carried, not yet filed for the newest quarter
35	BNP PARIBAS ARBITRAGE, SA 13F CIK 1166588 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	122,527	0.26%	+122,519	Jun 30, 2026	carried, not yet filed for the newest quarter
36	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	120,325	0.26%	+116,167	Jun 30, 2026	carried, not yet filed for the newest quarter
36.1	Goldman Sachs U.S. Tax-Managed Equity Fund Fund S000009340 · Registered fund · Jun 30, 2026 Goldman Sachs Trust, not summed	25,886	0.05%	—	Jun 30, 2026	Goldman Sachs Trust, not summed
37	NEW YORK STATE COMMON RETIREMENT FUND 13F CIK 810265 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	117,771	0.25%	+29,089	Jun 30, 2026	carried, not yet filed for the newest quarter
38	VOLORIDGE INVESTMENT MANAGEMENT, LLC 13F CIK 1556921 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	117,063	0.25%	+117,063	Jun 30, 2026	carried, not yet filed for the newest quarter
39	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	114,281	0.24%	+19,121	Jun 30, 2026	carried, not yet filed for the newest quarter
39.1	iShares U.S. Small-Cap Equity Factor ETF Fund S000048624 · Registered fund · Jul 31, 2026 iShares Trust, not summed	30,179	0.06%	+4,494	Jul 31, 2026	iShares Trust, not summed
39.2	iShares Morningstar Small-Cap Growth ETF Fund S000004434 · Registered fund · Jul 31, 2026 iShares Trust, not summed	1,962	0.00%	—	Jul 31, 2026	iShares Trust, not summed
39.3	iShares Morningstar Small-Cap ETF Fund S000004433 · Registered fund · Jul 31, 2026 iShares Trust, not summed	256	0.00%	—	Jul 31, 2026	iShares Trust, not summed
39.4	iShares Core S&P Total U.S. Stock Market ETF Fund S000004317 · Registered fund · Jun 30, 2026 iShares Trust, not summed	19	0.00%	—	Jun 30, 2026	iShares Trust, not summed
40	FRED ALGER MANAGEMENT, LLC 13F CIK 3520 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	114,123	0.24%	+114,123	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	ALGER SMALL CAP FOCUS FUND Fund S000020958 · Registered fund · Jul 31, 2026 ALGER FUNDS, not summed	144,165	0.31%	—	Jul 31, 2026	ALGER FUNDS, not summed
40.2	ALGER SMALL CAP GROWTH FUND Fund S000009160 · Registered fund · Jul 31, 2026 ALGER FUNDS, not summed	17,001	0.04%	—	Jul 31, 2026	ALGER FUNDS, not summed
40.3	ALGER SMALL CAP GROWTH INSTITUTIONAL FUND Fund S000009202 · Registered fund · Jul 31, 2026 ALGER INSTITUTIONAL FUNDS, not summed	6,629	0.01%	—	Jul 31, 2026	ALGER INSTITUTIONAL FUNDS, not summed
41	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	96,600	0.20%	+45,346	Jun 30, 2026	carried, not yet filed for the newest quarter
42	T. Rowe Price Investment Management, Inc. 13F CIK 1897612 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	92,957	0.20%	+92,957	Jun 30, 2026	carried, not yet filed for the newest quarter
43	JNL/Invesco Small Cap Growth Fund Fund S000001743 · Registered fund · Jun 30, 2026 JNL Series Trust, not summed	91,625	0.19%	+31,026	Jun 30, 2026	JNL Series Trust, not summed
44	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	87,934	0.19%	-1,180	Jun 30, 2026	carried, not yet filed for the newest quarter
45	NeoTribe Ventures I, L.P. Insider CIK 1696926 · Jun 9, 2026 10% Owner, issuer-wide, not summed	87,362	0.19%	—	Jun 9, 2026	10% Owner, issuer-wide, not summed
45.1	Krishna Kittu Kolluri ("Kolluri") 13G CIK 1696926 · Unknown · Nov 7, 2025 Rule 13d-1(d), exempt investor	4,359,505	9.24%	—	Nov 7, 2025	Rule 13d-1(d), exempt investor
46	PERCEPTIVE ADVISORS LLC 13F CIK 1224962 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	86,812	0.18%	-5,000	Jun 30, 2026	carried, not yet filed for the newest quarter
47	LORD, ABBETT & CO. LLC 13F CIK 728100 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	86,293	0.18%	+42,004	Jun 30, 2026	carried, not yet filed for the newest quarter
47.1	LORD ABBETT DEVELOPING GROWTH FUND INC Fund S000006834 · Registered fund · Jul 31, 2026 LORD ABBETT DEVELOPING GROWTH FUND, INC., not summed	151,245	0.32%	—	Jul 31, 2026	LORD ABBETT DEVELOPING GROWTH FUND, INC., not summed
47.2	Lord Abbett Micro-Cap Growth Fund Fund S000007142 · Registered fund · Jul 31, 2026 LORD ABBETT SECURITIES TRUST, not summed	23,434	0.05%	+10,585	Jul 31, 2026	LORD ABBETT SECURITIES TRUST, not summed
48	HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 13F CIK 1535845 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	83,300	0.18%	+83,300	Jun 30, 2026	carried, not yet filed for the newest quarter
49	HRT FINANCIAL LP 13F CIK 1475597 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	80,709	0.17%	+80,709	Jun 30, 2026	carried, not yet filed for the newest quarter
50	MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 13F CIK 912938 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	78,977	0.17%	-80,596	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	MFS New Discovery Fund Fund S000000765 · Registered fund · May 31, 2026 MFS SERIES TRUST I, not summed	53,322	0.11%	0	May 31, 2026	MFS SERIES TRUST I, not summed
50.2	MFS New Discovery Series Fund S000002680 · Registered fund · Jun 30, 2026 MFS VARIABLE INSURANCE TRUST, not summed	18,955	0.04%	0	Jun 30, 2026	MFS VARIABLE INSURANCE TRUST, not summed
50.3	MFS Blended Research Small Cap Equity Fund Fund S000050659 · Registered fund · May 31, 2026 MFS SERIES TRUST X, not summed	3,882	0.01%	-150	May 31, 2026	MFS SERIES TRUST X, not summed
50.4	MFS Blended Research Small Cap Equity Portfolio Fund S000008071 · Registered fund · Jun 30, 2026 MFS VARIABLE INSURANCE TRUST III, not summed	1,106	0.00%	+55	Jun 30, 2026	MFS VARIABLE INSURANCE TRUST III, not summed
50.5	MFS Global Alternative Strategy Fund Fund S000019515 · Registered fund · Jul 31, 2026 MFS Series Trust XV, not summed	160	0.00%	-15	Jul 31, 2026	MFS Series Trust XV, not summed

5 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

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Key facts CIK 2070849 CUSIP 090168105 13F (30d) 17 filings 17 filers Visit website Investor relations