Starling Oncology, Inc.

STLN

Exchange: Nasdaq
Industry: Services-Offices & Clinics of Doctors of Medicine
SEC CIK: 0001799191

SEC filings (opens in a new tab)

In the last 90 days, Starling Oncology, Inc. insiders filed 3 open-market purchases and 2 sales; 119 institutions reported holding it in 13F filings for Q2 2026, worth $217.6M in total; no superinvestor holds it.

Other share classesDFPH STLNW

Q1 2026 vs. Q4 2025

How the institutions holding Starling Oncology, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of STLN: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	117	1	115	−1
Shares	38.5M	4.75M	38.8M	+5.03M (+14.9%)
Value	$137.1M	$16.9M	$118.9M	−$1.29M (−1.1%)

1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (25)

Institutions that held Starling Oncology, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to STLN in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Capital Management LLC	3,476,781	$10.7M	0.00%
Vanguard Portfolio Management LLC	862,839	$2.65M	0.00%
Ensign Peak Advisors, Inc	626,852	$1.92M	0.00%
Citadel Advisors LLC	608,267	$1.87M	0.00%
Vanguard Fiduciary Trust Co	483,060	$1.48M	0.00%
Dauntless Investment Group, LLC	462,057	$1.42M	3.99%
Centiva Capital, LP	224,245	$688.4K	0.03%
ADAR1 Capital Management, LLC	50,000	$153.5K	0.01%
Innovative Asset Advisors Group, LLC	47,250	$145.1K	0.08%
Graham Capital Management, L.P.	33,792	$103.7K	0.00%
Vanguard Global Advisers, LLC	28,874	$88.6K	0.00%
SRS Capital Advisors, Inc.	28,706	$88.1K	0.00%
Schonfeld Strategic Advisors LLC	21,234	$65.2K	0.00%
VestGen Advisors, LLC	12,000	$48.2K	0.00%
Granite Investment Partners, LLC	14,831	$45.5K	0.00%
Nine Masts Capital Ltd	14,018	$43.0K	0.01%
Virtu Financial LLC	13,213	$41.0K	0.00%
Quantbot Technologies LP	9,455	$29.0K	0.00%
Jones Financial Companies LLLP	578	$1.71K	0.00%
Twin Peaks Wealth Advisors, LLC	118	$362	0.00%
US Bancorp	96	$295	0.00%
Root Financial Partners, LLC	51	$157	0.00%
EverSource Wealth Advisors, LLC	13	$40	0.00%
Farther Finance Advisors, LLC	7	$22	0.00%
Keating Financial Advisory Services, Inc.	1	$3	0.00%

Sold out (26)

Institutions that held Starling Oncology, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of STLN in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Massar Capital Management, LP	400,000	$1.42M
GatePass Capital, LLC	360,000	$1.28M
FreeGulliver LLC	355,672	$1.27M
Maven Securities LTD	251,128	$894.0K
EAM Investors, LLC	182,509	$649.7K
SEI Investments Co	111,553	$397.1K
Gsa Capital Partners LLP	70,654	$252.0K
Point72 Asset Management, L.P.	69,275	$246.6K
Caption Management, LLC	50,100	$178.4K
nVerses Capital, LLC	31,595	$112.5K
Larson Financial Group LLC	31,468	$112.0K
GWM Advisors LLC	31,180	$111.0K
Mangrove Partners	30,581	$108.9K
National Bank of Canada	17,733	$63.0K
Adviser Investments LLC	15,633	$55.7K
Intrua Financial, LLC	11,676	$41.6K
Kestra Advisory Services, LLC	8,680	$30.9K
SBI Securities Co., Ltd.	3,500	$12.5K
Amalgamated Bank	2,144	$8.00K
Simplex Trading, LLC	1,806	$6.43K
Strive Financial Group ,LLC	1,584	$5.64K
SJS Investment Consulting Inc.	459	$1.64K
Signaturefd, LLC	186	$662
Parallel Advisors, LLC	39	$139
Northwestern Mutual Wealth Management Co	8	$28
Rothschild Investment LLC	1	$4

Not filed for Q1 2026 yet (1)

Institutions that held Starling Oncology, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding STLN in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	4,748,635	$16.9M