Starling Oncology

DFPH
CUSIP 68236X100 OTC COMMON STOCK
Reported in filings as: STARLING ONCOLOGY INC COM
Option CUSIPs: 68236X900 68236X950
Starling Oncology profile

Institutional ownership · Q2 2026

Institutional holders 119 +4 (+3.5%) vs Q1 2026
Reported value $217.6M +83.0% vs Q1 2026
Shares held 40.1M +1.3M shares
Quarter Q2 2026 Period ended Jun 30, 2026

119 institutional managers reported holding 40,091,308 shares worth $217,594,640 on Form 13F for Q2 2026, against 115 in Q1 2026. Share positions on CUSIP 68236X100 only; option legs and principal-amount lines are not counted.

Top 25 institutional holders · Q2 2026

# Manager Shares Value % of portfolio Change
1 BlackRock Inc 4,749,030 $25.8M < 0.01% +333.2K Position
2 DEERFIELD MANAGEMENT COMPANY L P SERIES C 3,360,052 $18.2M 0.19% — Position
3 VANGUARD CAPITAL MANAGEMENT LLC 3,265,531 $17.7M < 0.01% -211.3K Position
4 JOSH ARNOLD INVESTMENT CONSULTANT LLC 2,464,359 $13.4M 8.42% — Position
5 GEODE CAPITAL MANAGEMENT LLC 1,899,998 $10.3M < 0.01% +142.2K Position
6 The Goldman Sachs Group Inc 1,735,337 $9.4M < 0.01% +383.4K Position
7 WEXFORD CAPITAL LP 1,711,323 $9.3M 1.19% — Position
8 STATE STREET CORPORATION 1,552,917 $8.4M < 0.01% +91.5K Position
9 Nuveen LLC 1,408,720 $7.6M < 0.01% +1.3M Position
10 RENAISSANCE TECHNOLOGIES LLC 1,365,913 $7.4M 0.01% +463.1K Position
11 CenterBook Partners LP 1,241,660 $6.7M 0.33% -326.8K Position
12 MARSHALL WACE LLP 1,222,498 $6.6M < 0.01% +880.2K Position
13 VANGUARD PORTFOLIO MANAGEMENT LLC 1,007,037 $5.5M < 0.01% +144.2K Position
14 CITADEL ADVISORS LLC 894,101 $4.9M < 0.01% +285.8K Position
15 JANE STREET GROUP LLC 852,163 $4.6M < 0.01% +427.3K Position
16 B RILEY FINANCIAL INC 742,593 $4.0M 0.93% -187.1K Position
17 ARROWSTREET CAPITAL LIMITED PARTNERSHIP 710,888 $3.9M < 0.01% +291.5K Position
18 TWO SIGMA INVESTMENTS LP 668,839 $3.6M < 0.01% +361.1K Position
19 NORTHERN TRUST CORPORATION 591,534 $3.2M < 0.01% +33.1K Position
20 ACADIAN ASSET MANAGEMENT LLC 567,001 $3.1M < 0.01% New Position
21 VANGUARD FIDUCIARY TRUST CO 502,049 $2.7M < 0.01% +19.0K Position
22 FourWorld Capital Management LLC 499,196 $2.7M 2.47% — Position
23 Manatuck Hill Partners LLC 450,000 $2.4M 0.81% New Position
24 Walleye Capital LLC 445,832 $2.4M < 0.01% New Position
25 Inspire Investing LLC 424,008 $2.3M 0.09% New Position

Values as reported on each manager's Q2 2026 Form 13F. Change is in shares against the manager's prior-quarter filing.

13F holders by quarter

Quarter Holders Shares Value
Q2 2026 119 +4 40.1M $217.6M
Q1 2026 115 -2 38.8M $118.9M
Q4 2025 117 +9 38.5M $137.1M
Q3 2025 108 +29 34.7M $121.0M
Q2 2025 79 +37 31.9M $65.5M
Q1 2025 42 +11 17.1M $19.4M
Q4 2024 31 -3 14.7M $4.6M
Q3 2024 34 -5 20.6M $7.0M
Q2 2024 39 -8 18.7M $8.8M
Q1 2024 47 +2 17.3M $28.2M
Q4 2023 45 +9 18.4M $38.2M
Q3 2023 36 -2 15.1M $21.2M
Q2 2023 38 -1 13.9M $7.7M
Q1 2023 39 -1 22.0M $15.3M
Q4 2022 40 +3 23.5M $39.2M
Q3 2022 37 +3 23.1M $107.3M
Q2 2022 34 +6 21.7M $110.0M
Q1 2022 28 +8 20.6M $155.8M
Q4 2021 20 +19 20.7M $195.3M
Q3 2021 1 252.4K $2.5M

Q3 2021–Q2 2026, as reported on Form 13F.

Across other SEC filings

Fund holders · N-PORT

112 funds
Fund Value % of fund As of
VANGUARD TOTAL STOCK MARKET INDEX FUND VTI $13.0M < 0.01% Jun 2026
iShares Russell 2000 ETF IWM $10.9M 0.01% Jun 2026
Nuveen Quant Small Cap Equity Fund $5.0M 0.12% Jul 2026
VANGUARD EXTENDED MARKET INDEX FUND $4.3M < 0.01% Jun 2026
Fidelity Small Cap Index Fund $4.1M 0.01% Jul 2026
iShares Russell 2000 Growth ETF IWO $3.0M 0.02% Jun 2026
Fidelity Extended Market Index Fund $2.0M < 0.01% Aug 2026
VANGUARD RUSSELL 2000 INDEX FUND VTWO $1.9M 0.01% May 2026
iShares Micro-Cap ETF IWC $1.4M 0.09% Jun 2026
VANGUARD U.S. MOMENTUM FACTOR ETF VFMO $1.3M 0.07% May 2026

112 funds reported holding $63,796,709 in total on their latest public Form N-PORT reports, the most recent dated August 2026.

Annual & quarterly reports

  • 10-K · FY2025 Filed 2026-03-12
    Business · Risk Factors · Management's Discussion and Analysis
  • 10-Q · Q2 FY2026 Filed 2026-08-06
    Management's Discussion and Analysis · Controls and Procedures · Legal Proceedings · Risk Factors
All Starling Oncology SEC filings

5%+ holders · 13D/G

1 filer
Filer % of class Filed
Ravi Sarin 13D 4.7% 2025-04-23

Latest Schedule 13D or 13G from each filer naming this CUSIP; stakes a filer has reported closed are left out.

Insiders · Form 4

Net insider transactions, 12 months -$123K 13 filings with purchases ($2.69M), 7 filings with sales ($2.81M)
Latest filings
All Starling Oncology insider filings

Ownership explorer

Security Details

CUSIP 68236X100
FIGI BBG00S5H21J0
Symbol DFPH
Type Common stock
Class COM as filed on 13F
Exchange OTC
Company Starling Oncology

Other securities from this issuer

Name Symbol CUSIP Type
ONCOLOGY INSTITUTE INC CW-22 TOIIW 68236X118 Warrant

Identifier History

Type Value From To
SYMBOL TOI 2026-08-22 2026-08-26
SYMBOL STLN 2026-08-19 Current
SYMBOL STLNW 2026-08-19 Current
SYMBOL TOI 2026-07-29 2026-08-19
SYMBOL TOI 2026-07-19 2026-07-27
SYMBOL DFPH 2026-07-18 Current
FIGI BBG00S5H21J0 2026-02-07 Current
CUSIP 68236X100 2021-11-16 Current

Listing History

Symbol Exchange From To
TOI 2026-08-22 2026-08-26
STLNW Nasdaq 2026-08-19 Current
STLN Nasdaq 2026-08-17 Current
TOIIW Nasdaq 2026-02-07 2026-07-18
TOI Nasdaq 2021-11-16 2026-08-19
DFPH OTC 2021-11-16 Current