GENB · Generate Biomedicines, Inc. · Shareholders & Ownership

$13.06 +0.49 (+3.90%) At close · Nov 6

Russell 2000 member Rebalance outlook locked

Market Cap

$1.68B

128.35M

Volume · Nov 6 632.2K Avg daily vol (3M) 1.2M

Every disclosed holder of GENB 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 GENB

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)	103	102,109,290	79.55%	Yes
Insiders (Forms 3, 4, 5)	8	6,752,451	5.26%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	19,490,695	15.19%	Rest
Registered funds (N-PORT, not summed)	108	14,273,406	11.12%	No

Shares outstanding: 128,352,436, the issuer's latest cover-page count restated onto today's split basis.

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 GENB

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	Flagship Pioneering, LLC 13F CIK 1400240 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	62,673,117	48.83%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	AFEYAN NOUBAR Insider CIK 1222012 · Mar 2, 2026 Director, 10% Owner, issuer-wide, not summed	62,673,117	48.83%	0	Mar 2, 2026	Director, 10% Owner, issuer-wide, not summed
2	FMR LLC 13G CIK 315066 · Holding company · Sep 30, 2026 Rule 13d-1(b), qualified institution, not summed	7,186,203	5.60%	—	Sep 30, 2026	Rule 13d-1(b), qualified institution, not summed
2.1	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	5,221,599	4.07%	+1,004,075	Jun 30, 2026	carried, not yet filed for the newest quarter
2.2	Fidelity Growth Company Fund Fund S000007119 · Registered fund · Aug 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	2,186,392	1.70%	+1,551,692	Aug 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
2.3	Fidelity Growth Company K6 Fund Fund S000065696 · Registered fund · Aug 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	695,890	0.54%	+518,654	Aug 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
2.4	Fidelity Series Growth Company Fund Fund S000042626 · Registered fund · Aug 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	555,621	0.43%	+386,321	Aug 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
2.5	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	267,202	0.21%	—	Jul 31, 2026	Fidelity Salem Street Trust, not summed
3	Nally Michael 13G CIK 1763945 · Unknown · Mar 31, 2026 Rule 13d-1(d), exempt investor, not summed	6,919,051	5.39%	—	Mar 31, 2026	Rule 13d-1(d), exempt investor, not summed
3.1	Nally Michael Insider CIK 1763945 · Mar 4, 2026 EVP, Chief Marketing Officer, issuer-wide	2,889,154	2.25%	+20,000	Mar 4, 2026	EVP, Chief Marketing Officer, issuer-wide
4	Capital World Investors 13F CIK 1422849 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	4,215,632	3.28%	+211,483	Jun 30, 2026	carried, not yet filed for the newest quarter
5	SMALLCAP World Fund Inc Fund S000009599 · Registered fund · Jun 30, 2026 SMALLCAP World Fund Inc, not summed	3,752,630	2.92%	+102,596	Jun 30, 2026	SMALLCAP World Fund Inc, not summed
6	BRAIDWELL LP 13F CIK 1920938 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,283,844	2.56%	-309,155	Jun 30, 2026	carried, not yet filed for the newest quarter
7	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,156,627	1.68%	+46,994	Jun 30, 2026	carried, not yet filed for the newest quarter
7.1	T. Rowe Price Health Sciences Fund, Inc. Fund S000002088 · Registered fund · Jun 30, 2026 T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed	314,964	0.25%	+49,323	Jun 30, 2026	T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed
7.2	T. Rowe Price Health Sciences Portfolio Fund S000002083 · Registered fund · Jun 30, 2026 T. ROWE PRICE EQUITY SERIES, INC., not summed	19,115	0.01%	+3,072	Jun 30, 2026	T. ROWE PRICE EQUITY SERIES, INC., not summed
7.3	T. Rowe Price Small-Cap Index Fund Fund S000051327 · Registered fund · Jun 30, 2026 T. ROWE PRICE INDEX TRUST, INC., not summed	3,724	0.00%	—	Jun 30, 2026	T. ROWE PRICE INDEX TRUST, INC., not summed
8	NORGES BANK 13F CIK 1374170 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	2,094,616	1.63%	—	Jun 30, 2026	carried, not yet filed for the newest quarter
9	ARCH Venture Management, LLC 13F CIK 1274403 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,944,426	1.51%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
10	BANQUE PICTET & CIE SA 13F CIK 1535602 · Unknown · Sep 30, 2026	1,773,043	1.38%	+1,773,043	Sep 30, 2026
11	HarbourVest Partners LLC 13F CIK 1201001 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,722,210	1.34%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
12	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,659,966	1.29%	+1,659,966	Jun 30, 2026	carried, not yet filed for the newest quarter
12.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	617,886	0.48%	—	Jun 30, 2026	iShares Trust, not summed
12.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	157,860	0.12%	—	Jun 30, 2026	iShares Trust, not summed
12.3	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	66,087	0.05%	—	Jun 30, 2026	iShares Trust, not summed
12.4	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	45,633	0.04%	—	Jun 30, 2026	Quantitative Master Series LLC, not summed
12.5	iShares Russell Small/Mid-Cap Index Fund Fund S000050373 · Registered fund · Jul 31, 2026 BlackRock Funds, not summed	4,397	0.00%	—	Jul 31, 2026	BlackRock Funds, not summed
13	Pioneering Medicines 02, LLC Insider CIK 2117576 · Mar 2, 2026 10% Owner, issuer-wide	1,562,500	1.22%	—	Mar 2, 2026	10% Owner, issuer-wide
14	BAKER BROS. ADVISORS LP 13F CIK 1263508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,423,602	1.11%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
15	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,409,649	1.10%	-1,537,610	Jun 30, 2026	carried, not yet filed for the newest quarter
16	Deep Track Capital, LP 13F CIK 1856083 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,333,815	1.04%	+1,333,815	Jun 30, 2026	carried, not yet filed for the newest quarter
17	ARK Investment Management LLC 13F CIK 1697748 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,284,617	1.00%	+786,209	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	ARK Genomic Revolution ETF Fund S000042975 · Registered fund · Jul 31, 2026 ARK ETF Trust, not summed	1,237,891	0.96%	+734,360	Jul 31, 2026	ARK ETF Trust, not summed
18	Bancel Stephane Insider CIK 1443340 · Mar 2, 2026 Director, issuer-wide	1,184,989	0.92%	+724,160	Mar 2, 2026	Director, issuer-wide
19	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,132,750	0.88%	+1,001,431	Jun 30, 2026	carried, not yet filed for the newest quarter
20	HARVARD MANAGEMENT CO INC 13F CIK 1082621 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,111,100	0.87%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
21	NVIDIA CORP 13F CIK 1045810 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	833,325	0.65%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
22	Davern Capital Partners, LP 13F CIK 2003147 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	824,679	0.64%	+232,879	Jun 30, 2026	carried, not yet filed for the newest quarter
23	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	816,876	0.64%	+720,000	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
24	Siren, L.L.C. 13F CIK 2005245 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	736,104	0.57%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
25	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Sep 30, 2026	729,083	0.57%	-5,920	Sep 30, 2026
26	Grigoryan Gevorg Insider CIK 2108976 · Feb 26, 2026 Chief Technology Officer, issuer-wide	659,973	0.51%	—	Feb 26, 2026	Chief Technology Officer, issuer-wide
27	JPMorgan Small Cap Growth Fund Fund S000003859 · Registered fund · Jun 30, 2026 JPMorgan Trust II, not summed	580,246	0.45%	-16,222	Jun 30, 2026	JPMorgan Trust II, not summed
28	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	526,565	0.41%	+526,565	Jun 30, 2026	carried, not yet filed for the newest quarter
28.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	6,800	0.01%	—	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
28.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	616	0.00%	—	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
29	ARNOLD FRANCES Insider CIK 1665419 · Oct 29, 2026 Director, issuer-wide	452,535	0.35%	-11,409	Oct 29, 2026	Director, issuer-wide
30	ARK Venture Fund Fund · Registered fund · Jul 31, 2026 ARK Venture Fund, not summed	409,871	0.32%	—	Jul 31, 2026	ARK Venture Fund, not summed
31	Affinity Asset Advisors, LLC 13F CIK 1773195 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	400,000	0.31%	+50,000	Jun 30, 2026	carried, not yet filed for the newest quarter
32	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	377,994	0.29%	+40,692	Jun 30, 2026	carried, not yet filed for the newest quarter
33	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	326,273	0.25%	-30,431	Jun 30, 2026	carried, not yet filed for the newest quarter
34	Eaton Vance Worldwide Health Sciences Fund Fund S000005202 · Registered fund · Aug 31, 2026 Eaton Vance Growth Trust, not summed	308,946	0.24%	-3,554	Aug 31, 2026	Eaton Vance Growth Trust, not summed
35	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	296,479	0.23%	+265,256	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
36	SPHERA FUNDS MANAGEMENT LTD. 13F CIK 1496201 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	245,000	0.19%	+60,000	Jun 30, 2026	carried, not yet filed for the newest quarter
37	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	224,602	0.18%	+224,602	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · Aug 31, 2026 SCHWAB STRATEGIC TRUST, not summed	119,988	0.09%	—	Aug 31, 2026	SCHWAB STRATEGIC TRUST, not summed
37.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	59,231	0.05%	—	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
37.3	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	25,592	0.02%	—	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
37.4	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · Aug 31, 2026 SCHWAB STRATEGIC TRUST, not summed	18,814	0.01%	—	Aug 31, 2026	SCHWAB STRATEGIC TRUST, not summed
38	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	197,543	0.15%	+197,543	Jun 30, 2026	carried, not yet filed for the newest quarter
38.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	12,605	0.01%	—	Jun 30, 2026	Northern Funds, not summed
39	JPMorgan Small Cap Blend Fund Fund S000002767 · Registered fund · Jun 30, 2026 JPMorgan Trust I, not summed	184,432	0.14%	-8,323	Jun 30, 2026	JPMorgan Trust I, not summed
40	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	175,356	0.14%	+157,900	Jun 30, 2026	carried, not yet filed for the newest quarter
41	American Funds U.S. Small & Mid Cap Equity Fund Fund S000087820 · Registered fund · Aug 31, 2026 American Funds U.S. Small & Mid Cap Equity Fund, not summed	174,326	0.14%	0	Aug 31, 2026	American Funds U.S. Small & Mid Cap Equity Fund, not summed
42	ALPS ADVISORS INC 13F CIK 1376113 · Registered investment adviser · Sep 30, 2026	170,042	0.13%	+40,636	Sep 30, 2026
42.1	ALPS Medical Breakthroughs ETF Fund S000047823 · Registered fund · Aug 31, 2026 ALPS ETF TRUST, not summed	157,939	0.12%	—	Aug 31, 2026	ALPS ETF TRUST, not summed
43	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	167,285	0.13%	+167,285	Jun 30, 2026	carried, not yet filed for the newest quarter
44	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · Aug 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	139,555	0.11%	—	Aug 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
45	Savant Capital, LLC 13F CIK 1482880 · Registered investment adviser · Sep 30, 2026	139,418	0.11%	+139,418	Sep 30, 2026
46	SEVEN GRAND MANAGERS, LLC 13F CIK 1909126 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	125,000	0.10%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
47	BARCLAYS PLC 13F CIK 312069 · Bank · Sep 30, 2026	118,474	0.09%	+1,572	Sep 30, 2026
48	SMALLCAP World Fund Fund S000008790 · Registered fund · Jun 30, 2026 AMERICAN FUNDS INSURANCE SERIES, not summed	103,973	0.08%	—	Jun 30, 2026	AMERICAN FUNDS INSURANCE SERIES, not summed
49	LMR Partners LLP 13F CIK 1578621 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	100,000	0.08%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
50	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	91,100	0.07%	+3,765	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	Columbia Research Enhanced Small Cap ETF Fund S000095313 · Registered fund · Jun 30, 2026 Columbia ETF Trust I, not summed	64	0.00%	—	Jun 30, 2026	Columbia ETF Trust I, not summed

10 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.

Showing 1–50 of 181 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 2100782 CUSIP 370920100 13F (30d) 35 filings 35 filers Visit website Investor relations