KLRA · Kailera Therapeutics, Inc. · Shareholders & Ownership

$12.85 -0.42 (-3.17%) At close · Oct 23

Russell 2000 member Rebalance outlook locked

Market Cap

$1.67B

129.64M

Volume · Oct 23 1.56M Avg daily vol (3M) 1M

Every disclosed holder of KLRA 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 KLRA

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

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	104	116,995,704	90.24%	Yes
Insiders (Forms 3, 4, 5)	4	50,911,077	39.27%	Yes
13D/G-only blocks	2	48,838,849	37.67%	Yes
Remaining	—	87,101,954	-67.19%	Negative
Registered funds (N-PORT, not summed)	124	16,493,664	12.72%	No

Shares outstanding: 129,643,676, 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 KLRA

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	Bain Capital Investors LLC 13F CIK 1040508 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	26,255,581	20.25%	+26,255,581	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	BAIN CAPITAL INVESTORS LLC Insider CIK 1040508 · Apr 20, 2026 10% Owner, issuer-wide, not summed	26,255,581	20.25%	—	Apr 20, 2026	10% Owner, issuer-wide, not summed
2	BCPE Perseus Investor, LP 13D CIK 2100174 · Unknown · Apr 16, 2026 Item 4 purpose: Passive investment, Other	26,255,581	20.25%	—	Apr 16, 2026
3	Kaplan Andrew T. Insider CIK 1752059 · Apr 20, 2026 Director, 10% Owner, issuer-wide	26,255,581	20.25%	—	Apr 20, 2026	Director, 10% Owner, issuer-wide
4	Bain Capital Life Sciences Investors, LLC 13F CIK 1703031 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	22,583,268	17.42%	+22,583,268	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	Bain Capital Life Sciences Investors, LLC Insider CIK 1703031 · Apr 20, 2026 10% Owner, issuer-wide, not summed	22,583,268	17.42%	—	Apr 20, 2026	10% Owner, issuer-wide, not summed
5	BCLS Fund IV Investments, L.P. 13D CIK 2015454 · Unknown · Apr 16, 2026 Item 4 purpose: Passive investment, Other	22,583,268	17.42%	—	Apr 16, 2026
6	Koppel Adam Insider CIK 1578965 · Apr 20, 2026 Director, 10% Owner, issuer-wide	22,583,268	17.42%	—	Apr 20, 2026	Director, 10% Owner, issuer-wide
7	Jiangsu Hengrui Pharmaceuticals Co., Ltd. 13G CIK 2080343 · Unknown · Jun 30, 2026 Rule 13d-1(d), exempt investor, not summed	11,511,853	8.88%	—	Jun 30, 2026	Rule 13d-1(d), exempt investor, not summed
7.1	Jiangsu Hengrui Pharmaceuticals Co., Ltd. Insider CIK 2080343 · Apr 20, 2026 10% Owner, issuer-wide	2,034,134	1.57%	+2,034,133	Apr 20, 2026	10% Owner, issuer-wide
8	RTW INVESTMENTS, LP 13F CIK 1493215 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	10,776,820	8.31%	+10,776,820	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	RTW INVESTMENTS, LP Insider CIK 1493215 · Apr 20, 2026 10% Owner, issuer-wide, not summed	10,776,820	8.31%	—	Apr 20, 2026	10% Owner, issuer-wide, not summed
8.2	RTW INVESTMENTS, LP 13G CIK 1493215 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(b), qualified institution, not summed	10,776,820	8.31%	—	Jun 30, 2026	Rule 13d-1(b), qualified institution, not summed
9	CANADA PENSION PLAN INVESTMENT BOARD 13F CIK 1283718 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	7,304,688	5.63%	+7,304,688	Jun 30, 2026	carried, not yet filed for the newest quarter
9.1	CANADA PENSION PLAN INVESTMENT BOARD 13G CIK 1283718 · Non-US institution · Jun 30, 2026 Rule 13d-1(d), exempt investor, not summed	7,304,688	5.63%	—	Jun 30, 2026	Rule 13d-1(d), exempt investor, not summed
10	Atlas Venture Life Science Advisors, LLC 13F CIK 1917529 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	5,171,282	3.99%	+5,171,282	Jun 30, 2026	carried, not yet filed for the newest quarter
11	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	3,970,865	3.06%	+3,970,865	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	Fidelity Growth Company Fund Fund S000007119 · Registered fund · May 31, 2026 Fidelity Mt. Vernon Street Trust, not summed	752,900	0.58%	—	May 31, 2026	Fidelity Mt. Vernon Street Trust, not summed
11.2	Select Biotechnology Portfolio Fund S000007486 · Registered fund · May 31, 2026 Fidelity Select Portfolios, not summed	619,399	0.48%	—	May 31, 2026	Fidelity Select Portfolios, not summed
11.3	Fidelity Blue Chip Growth Fund Fund S000007195 · Registered fund · Jul 31, 2026 Fidelity Securities Fund, not summed	587,097	0.45%	0	Jul 31, 2026	Fidelity Securities Fund, not summed
11.4	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	503,961	0.39%	—	Jul 31, 2026	Fidelity Salem Street Trust, not summed
11.5	Fidelity Balanced Fund Fund S000007151 · Registered fund · May 31, 2026 Fidelity Puritan Trust, not summed	261,900	0.20%	—	May 31, 2026	Fidelity Puritan Trust, not summed
12	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	3,928,604	3.03%	+3,928,604	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	1,163,223	0.90%	—	Jun 30, 2026	iShares Trust, not summed
12.2	BlackRock Health Sciences Opportunities Portfolio Fund S000001877 · Registered fund · May 29, 2026 BlackRock Funds, not summed	464,174	0.36%	—	May 29, 2026	BlackRock Funds, not summed
12.3	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	291,357	0.22%	—	Jun 30, 2026	iShares Trust, not summed
12.4	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	136,594	0.11%	—	Jun 30, 2026	iShares Trust, not summed
12.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	86,313	0.07%	—	Jun 30, 2026	Quantitative Master Series LLC, not summed
13	PRICE T ROWE ASSOCIATES INC /MD/ 13F CIK 80255 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,534,410	2.73%	+3,534,410	Jun 30, 2026	carried, not yet filed for the newest quarter
13.1	T. Rowe Price Health Sciences Fund, Inc. Fund S000002088 · Registered fund · Jun 30, 2026 T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed	904,283	0.70%	—	Jun 30, 2026	T. ROWE PRICE HEALTH SCIENCES FUND, INC., not summed
13.2	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	635,206	0.49%	—	Jun 30, 2026	T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
13.3	T. Rowe Price New Horizons Fund, Inc. Fund S000002106 · Registered fund · Jun 30, 2026 T. ROWE PRICE NEW HORIZONS FUND, INC., not summed	367,899	0.28%	—	Jun 30, 2026	T. ROWE PRICE NEW HORIZONS FUND, INC., not summed
13.4	T. Rowe Price Health Sciences Portfolio Fund S000002083 · Registered fund · Jun 30, 2026 T. ROWE PRICE EQUITY SERIES, INC., not summed	55,664	0.04%	—	Jun 30, 2026	T. ROWE PRICE EQUITY SERIES, INC., not summed
13.5	T. Rowe Price Extended Equity Market Index Fund Fund S000002090 · Registered fund · Jun 30, 2026 T. ROWE PRICE INDEX TRUST, INC., not summed	11,970	0.01%	—	Jun 30, 2026	T. ROWE PRICE INDEX TRUST, INC., not summed
14	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,240,787	2.50%	+3,240,787	Jun 30, 2026	carried, not yet filed for the newest quarter
15	ADAGE CAPITAL PARTNERS GP, L.L.C. 13F CIK 1165408 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,208,286	2.47%	+3,208,286	Jun 30, 2026	carried, not yet filed for the newest quarter
16	WELLINGTON MANAGEMENT GROUP LLP 13F CIK 902219 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,919,110	2.25%	+2,919,110	Jun 30, 2026	carried, not yet filed for the newest quarter
16.1	VANGUARD HEALTH CARE FUND Fund S000002922 · Registered fund · Jul 31, 2026 VANGUARD SPECIALIZED FUNDS, not summed	2,191,928	1.69%	+64,664	Jul 31, 2026	VANGUARD SPECIALIZED FUNDS, not summed
17	Royalty Pharma Sub-Manager, LLC 13F CIK 2081668 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,455,357	1.89%	+2,455,357	Jun 30, 2026	carried, not yet filed for the newest quarter
18	Siren, L.L.C. 13F CIK 2005245 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	2,214,286	1.71%	+2,214,286	Jun 30, 2026	carried, not yet filed for the newest quarter
19	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,693,958	1.31%	+1,693,958	Jun 30, 2026	carried, not yet filed for the newest quarter
20	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,652,507	1.27%	+1,652,507	Jun 30, 2026	carried, not yet filed for the newest quarter
21	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,180,411	0.91%	—	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
22	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,133,115	0.87%	+1,133,115	Jun 30, 2026	carried, not yet filed for the newest quarter
23	FARALLON CAPITAL MANAGEMENT LLC 13F CIK 909661 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,100,000	0.85%	+1,100,000	Jun 30, 2026	carried, not yet filed for the newest quarter
24	Frazier Life Sciences Management, L.P. 13F CIK 1892134 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,100,000	0.85%	+1,100,000	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Trails Edge Capital Partners, LP 13F CIK 2077247 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	984,786	0.76%	+984,786	Jun 30, 2026	carried, not yet filed for the newest quarter
26	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	972,683	0.75%	+972,683	Jun 30, 2026	carried, not yet filed for the newest quarter
27	Jupiter Topco LLC 13F CIK 2146052 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	970,857	0.75%	+970,857	Jun 30, 2026	carried, not yet filed for the newest quarter
28	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	868,160	0.67%	+868,160	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	12,600	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	1,166	0.00%	—	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
28.3	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	328	0.00%	—	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
29	VANGUARD SMALL-CAP INDEX FUND Fund S000002845 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	850,042	0.66%	—	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
30	AMERIPRISE FINANCIAL INC 13F CIK 820027 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	821,331	0.63%	+821,331	Jun 30, 2026	carried, not yet filed for the newest quarter
30.1	Columbia Variable Portfolio - Small Company Growth Fund Fund S000010658 · Registered fund · Jun 30, 2026 COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed	44,521	0.03%	—	Jun 30, 2026	COLUMBIA FUNDS VARIABLE INSURANCE TRUST, not summed
30.2	Columbia Integrated Small Cap Growth Fund Fund S000074122 · Registered fund · May 31, 2026 Columbia Funds Series Trust II, not summed	2,048	0.00%	—	May 31, 2026	Columbia Funds Series Trust II, not summed
30.3	Columbia Research Enhanced Small Cap ETF Fund S000095313 · Registered fund · Jun 30, 2026 Columbia ETF Trust I, not summed	104	0.00%	—	Jun 30, 2026	Columbia ETF Trust I, not summed
31	Deep Track Capital, LP 13F CIK 1856083 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	700,000	0.54%	+700,000	Jun 30, 2026	carried, not yet filed for the newest quarter
32	Columbia Small Cap Growth Fund Fund S000012073 · Registered fund · May 31, 2026 COLUMBIA FUNDS SERIES TRUST I, not summed	652,308	0.50%	—	May 31, 2026	COLUMBIA FUNDS SERIES TRUST I, not summed
33	EVENTIDE ASSET MANAGEMENT, LLC 13F CIK 1442891 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	616,720	0.48%	+616,720	Jun 30, 2026	carried, not yet filed for the newest quarter
33.1	Eventide Healthcare & Life Sciences Fund Fund S000039514 · Registered fund · Jun 30, 2026 MUTUAL FUND SERIES TRUST, not summed	616,720	0.48%	—	Jun 30, 2026	MUTUAL FUND SERIES TRUST, not summed
34	Vestal Point Capital, LP 13F CIK 1974915 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	575,000	0.44%	+575,000	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Cormorant Asset Management, LP 13F CIK 1583977 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	550,000	0.42%	+550,000	Jun 30, 2026	carried, not yet filed for the newest quarter
36	VANGUARD SMALL-CAP GROWTH INDEX FUND Fund S000002846 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	487,994	0.38%	—	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
37	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	476,221	0.37%	—	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
38	Catalio Capital Management, LP 13F CIK 1958125 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	468,750	0.36%	+468,750	Jun 30, 2026	carried, not yet filed for the newest quarter
39	FEDERATED HERMES, INC. 13F CIK 1056288 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	434,069	0.33%	+434,069	Jun 30, 2026	carried, not yet filed for the newest quarter
40	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	421,034	0.32%	+421,034	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	Multi-Manager U.S. Small Cap Equity Fund Fund S000051363 · Registered fund · Apr 30, 2026 Goldman Sachs Trust II, not summed	2,000	0.00%	—	Apr 30, 2026	Goldman Sachs Trust II, not summed
41	Federated Hermes Kaufmann Small Cap Fund Fund S000009730 · Registered fund · Jul 31, 2026 Federated Hermes Equity Funds, not summed	403,600	0.31%	-96,400	Jul 31, 2026	Federated Hermes Equity Funds, not summed
42	FRANKLIN RESOURCES INC 13F CIK 38777 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	400,023	0.31%	+400,023	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	Franklin Biotechnology Discovery Fund Fund S000006882 · Registered fund · Jul 31, 2026 Franklin Strategic Series, not summed	146,385	0.11%	0	Jul 31, 2026	Franklin Strategic Series, not summed
43	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	362,910	0.28%	+362,910	Jun 30, 2026	carried, not yet filed for the newest quarter
43.1	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	111,358	0.09%	—	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
43.2	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	30,000	0.02%	—	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
44	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	354,431	0.27%	+354,431	Jun 30, 2026	carried, not yet filed for the newest quarter
44.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	23,283	0.02%	—	Jun 30, 2026	Northern Funds, not summed
45	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	290,128	0.22%	+290,128	Jun 30, 2026	carried, not yet filed for the newest quarter
46	SEVEN GRAND MANAGERS, LLC 13F CIK 1909126 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	175,000	0.14%	+175,000	Jun 30, 2026	carried, not yet filed for the newest quarter
47	VANGUARD EXPLORER FUND Fund S000002578 · Registered fund · Jul 31, 2026 VANGUARD EXPLORER FUND, not summed	160,675	0.12%	—	Jul 31, 2026	VANGUARD EXPLORER FUND, not summed
48	Balyasny Asset Management L.P. 13F CIK 1218710 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	154,838	0.12%	+154,838	Jun 30, 2026	carried, not yet filed for the newest quarter
49	EXCHANGE TRADED CONCEPTS, LLC 13F CIK 1457320 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	152,501	0.12%	+152,501	Jun 30, 2026	carried, not yet filed for the newest quarter
49.1	Roundhill GLP-1 & Weight Loss ETF Fund S000085000 · Registered fund · Jun 30, 2026 Roundhill ETF Trust, not summed	152,501	0.12%	—	Jun 30, 2026	Roundhill ETF Trust, not summed
50	MANUFACTURERS LIFE INSURANCE COMPANY, THE 13F CIK 928047 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	149,817	0.12%	+149,817	Jun 30, 2026	carried, not yet filed for the newest quarter

17 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 172 holders

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Key facts CIK 2096997 CUSIP 482931102 13F (30d) 10 filings 10 filers Visit website Investor relations