CGEM · Cullinan Therapeutics, Inc. · Shareholders & Ownership
Every disclosed holder of CGEM 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.
Who Owns CGEM
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 71,580,194 | 111.23% |
| Insiders (Forms 3, 4, 5) | 1,209,085 | 1.88% |
| 13D/G-only blocks | 15,829,314 | 24.60% |
| Remaining | 24,263,899 | -37.70% |
| Registered funds (N-PORT, not summed) | 16,549,518 | 25.72% |
Shares outstanding: 64,354,694, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
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 CGEM
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
MPM BIOIMPACT LLC
13F
CIK 1687078 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
9,731,341 | ||
| 2 |
Lynx1 Capital Management LP
13F
CIK 1910456 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
8,963,500 | ||
| 2.1 |
|
8,963,500 | ||
| 3 |
BIOTECHNOLOGY VALUE FUND L P
13G
CIK 918923 · Unknown · Jun 30, 2026
Rule 13d-1(c), passive investor
|
6,491,123 | ||
| 4 |
|
5,750,683 | ||
| 5 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,232,766 | ||
| 5.1 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,577,982 | ||
| 5.2 |
iShares Russell 2000 Value ETF
Fund
S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
562,565 | ||
| 5.3 |
iShares Biotechnology ETF
Fund
S000004350 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
318,933 | ||
| 5.4 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
202,566 | ||
| 5.5 |
iShares U.S. Small-Cap Equity Factor ETF
Fund
S000048624 · Registered fund · Jul 31, 2026
iShares Trust, not summed
|
115,107 | ||
| 6 |
PRICE T ROWE ASSOCIATES INC /MD/
13F
CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,825,950 | ||
| 6.1 |
PRICE T ROWE ASSOCIATES INC /MD/
13G
CIK 80255 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
3,825,950 | ||
| 6.2 |
T. Rowe Price New Horizons Fund, Inc.
Fund
S000002106 · Registered fund · Jun 30, 2026
T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
|
1,019,356 | ||
| 6.3 |
T. Rowe Price Health Sciences Fund, Inc.
Fund
S000002088 · Registered fund · Jun 30, 2026
T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed
|
583,803 | ||
| 6.4 |
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
|
559,800 | ||
| 6.5 |
T. Rowe Price Small-Mid Cap ETF
Fund
S000079837 · Registered fund · Jun 30, 2026
T. Rowe Price Exchange-Traded Funds, Inc., not summed
|
156,443 | ||
| 7 |
|
3,668,627 | ||
| 7.1 |
STATE STREET CORP
13G
CIK 93751 · Bank · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
3,668,627 | ||
| 7.2 |
State Street(R) SPDR(R) S&P(R) Biotech ETF
Fund
S000010018 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
2,377,645 | ||
| 7.3 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
19,400 | ||
| 7.4 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
1,527 | ||
| 7.5 |
State Street Balanced Index Fund
Fund
S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
413 | ||
| 8 |
Kynam Capital Management, LP
13F
CIK 1907884 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,114,132 | ||
| 9 |
Deerfield Management Company, L.P.
13G
CIK 1352546 · Unknown · Sep 30, 2025
Rule 13d-1(c), passive investor
|
2,927,013 | ||
| 10 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,614,066 | ||
| 11 |
BlackRock Inc.
13G
CIK 1364742 · Holding company · Dec 31, 2023
Rule 13d-1(b), qualified institution
|
2,462,274 | ||
| 12 |
RTW INVESTMENTS, LP
13F
CIK 1493215 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,364,347 | ||
| 13 |
|
2,177,461 | ||
| 14 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,929,766 | ||
| 15 |
Siren, L.L.C.
13F
CIK 2005245 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,893,410 | ||
| 16 |
VANGUARD GROUP INC
13G
CIK 102909 · Registered investment adviser · Dec 29, 2023
Rule 13d-1(b), qualified institution
|
1,771,443 | ||
| 17 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,547,309 | ||
| 18 |
Blue Owl Capital Holdings LP
13F
CIK 1858703 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,539,764 | ||
| 19 |
Venrock Adviser, LLC
13F
CIK 1615982 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,379,965 | ||
| 20 |
BOOTHBAY FUND MANAGEMENT, LLC
13F
CIK 1549230 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,082,611 | ||
| 21 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,046,694 | ||
| 21.1 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
196,482 | ||
| 21.2 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
188,192 | ||
| 21.3 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
170,697 | ||
| 21.4 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
142,879 | ||
| 21.5 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
46,694 | ||
| 22 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,001,598 | ||
| 22.1 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
5,216 | ||
| 22.2 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
2,902 | ||
| 23 |
Affinity Asset Advisors, LLC
13F
CIK 1773195 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
875,760 | ||
| 24 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
738,741 | ||
| 25 |
BOONE CAPITAL MANAGEMENT LLC
13F
CIK 1882053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
704,442 | ||
| 26 |
Elmind Capital, LP
13F
CIK 2052213 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
690,000 | ||
| 27 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
629,035 | ||
| 28 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
621,218 | ||
| 29 |
TWIN FOCUS CAPITAL PARTNERS, LLC
13F
CIK 1387761 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
595,489 | ||
| 30 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
581,338 | ||
| 30.1 |
AQR Small Cap Multi-Style Fund
Fund
S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
18,923 | ||
| 31 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
571,080 | ||
| 31.1 |
Small Cap Value Fund
Fund
S000001246 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
41,929 | ||
| 31.2 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
30,582 | ||
| 31.3 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
7,121 | ||
| 31.4 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
3,792 | ||
| 32 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
510,325 | ||
| 33 |
|
471,947 | ||
| 33.1 |
Nuveen Quant Small Cap Equity Fund
Fund
S000005386 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
301,774 | ||
| 33.2 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
80,186 | ||
| 33.3 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
74,579 | ||
| 33.4 |
Nuveen Life Small Cap Equity Fund
Fund
S000005093 · Registered fund · Jun 30, 2026
TIAA-CREF Life Funds, not summed
|
6,276 | ||
| 33.5 |
TIAA Separate Account VA-1 - Stock Index Account
Fund
S000005098 · Registered fund · Jun 30, 2026
TIAA Separate Account VA-1, not summed
|
660 | ||
| 34 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
464,034 | ||
| 34.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
246,130 | ||
| 34.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
146,560 | ||
| 34.3 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
34,598 | ||
| 34.4 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
30,330 | ||
| 35 |
PERCEPTIVE ADVISORS LLC
13F
CIK 1224962 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
426,478 | ||
| 36 |
TCG Crossover Management, LLC
13F
CIK 1839948 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
406,786 | ||
| 37 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
397,484 | ||
| 38 |
|
390,803 | ||
| 39 |
DEUTSCHE BANK AG\
13F
CIK 948046 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
382,840 | ||
| 39.1 |
DWS Small Cap Index VIP
Fund
S000006223 · Registered fund · Jun 30, 2026
DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed
|
9,503 | ||
| 40 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
363,136 | ||
| 41 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
346,232 | ||
| 42 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
326,811 | ||
| 43 |
VANGUARD EXPLORER FUND
Fund
S000002578 · Registered fund · Jul 31, 2026
VANGUARD EXPLORER FUND, not summed
|
303,486 | ||
| 44 |
GREAT POINT PARTNERS LLC
13F
CIK 1281446 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
300,000 | ||
| 45 |
Connor, Clark & Lunn Investment Management Ltd.
13F
CIK 1596800 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
292,500 | ||
| 46 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
282,631 | ||
| 47 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
277,141 | ||
| 48 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
272,581 | ||
| 49 |
Bleichroeder LP
13F
CIK 1781002 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
250,000 | ||
| 50 |
|
248,627 |
23 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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