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Super Investors STEELHEAD PARTNERS LLC
SP

STEELHEAD PARTNERS LLC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$1.4B
Positions
25
Quarter ended
June 30, 2026
Filed
August 14, 2026

Reported portfolio value by quarter (53 quarters reported)

$1.99B $814M
Q2 13 Q1 16 Q4 18 Q3 21 Q2 24 Q2 26

$1.11B in Q2 2013 → $1.4B now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Uber Technologies Inc 10.3% Added 20% 120,000,000 $144M
Bridgebio Pharma Inc 8.9% Unchanged 70,000,000 $125M
Akamai Technologies Inc 8.6% Added 150% 100,000,000 $120M
AC Alarm Com Hldgs Inc 6.1% Unchanged 90,000,000 $85.5M
LI Lci Inds 5.6% Added 2.2% 70,500,000 $79.1M
Alnylam Pharmaceuticals Inc 5.6% Added 8.3% 65,000,000 $78.2M
Dexcom Inc 5.5% Unchanged 82,850,000 $77.5M
Nutanix Inc 5.2% Unchanged 65,000,000 $73.5M
Cloudflare Inc 4.6% Trimmed 29% 50,000,000 $64.4M
VS Varonis Sys Inc 4.1% Added 48% 59,140,000 $57.6M
Workiva Inc 4.1% Added 6.1% 61,000,000 $57.3M
On Semiconductor Corp 3.5% New 40,226,000 $48.6M
Bill Holdings Inc 3.1% Added 49% 50,000,000 $43.3M
Datadog Inc 3.0% New 30,000,000 $42.6M
Irhythm Holdings Inc 3.0% Added 5.5% 38,122,000 $42.1M
PH Post Hldgs Inc 2.8% Added 30% 38,014,000 $39.5M
Halozyme Therapeutics Inc 2.8% Added 84% 35,000,000 $39.1M
Doordash Inc 2.5% New 35,000,000 $34.4M
Snowflake Inc 2.4% New 20,000,000 $33.3M
Penguin Solutions Inc 2.0% Trimmed 57% 10,000,000 $28.4M
Blackline Inc 1.8% Unchanged 28,000,000 $25.8M
DH Digitalocean Hldgs Inc 1.7% New 20,427,000 $23.1M
AE Advanced Energy Inds 1.5% New 55,174 $20.6M
Travere Therapeutics Inc 1.3% New 15,000,000 $17.7M
Neogenomics Inc 0.1% New 129,200 $1.89M

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 14, 2026

Company Action Shares changed Value of change % of portfolio
O0 On 0 05/01/27 Exited −97,703,000 −$126M —
A2 Aeis 2 1/2 09/15/28 Exited −40,500,000 −$97.5M —
A1 Akam 1 1/8 02/15/29 Exited −77,000,000 −$88M —
Akamai Technologies Inc Added +60,000,000 +$72.1M 8.6%
On Semiconductor Corp New +40,226,000 +$48.6M 3.5%
Datadog Inc New +30,000,000 +$42.6M 3.0%
Penguin Solutions Inc Trimmed −13,000,000 −$36.9M 2.0%
I1 Itri 1 3/8 07/15/30 Exited −35,000,000 −$35.4M —
Doordash Inc New +35,000,000 +$34.4M 2.5%
Snowflake Inc New +20,000,000 +$33.3M 2.4%

Showing the 10 largest of 27 changes.

Q1 2026

quarter ended March 31, 2026 · filed May 13, 2026

Company Action Shares changed Value of change % of portfolio
B2 Bbio 2 1/2 03/15/27 New +70,000,000 +$127M 9.1%
L3 Lcii 3 03/01/30 New +69,000,000 +$83.2M 6.0%
A1 Alny 1 09/15/27 New +60,000,000 +$77.1M 5.5%
JI Jazz Investments I Ltd Exited −60,000,000 −$69.6M —
Box Inc Exited −53,609,000 −$62.7M —
C Confluent Inc Exited −61,040,000 −$59.5M —
U0 Uber 0 7/8 12/01/28 Added +45,000,000 +$54.4M 8.7%
W1 Wk 1 1/4 08/15/28 New +57,500,000 +$53.9M 3.9%
Tripadvisor Inc Exited −47,901,000 −$47.2M —
B1 Bl 1 06/01/29 Trimmed −49,000,000 −$46.1M 1.9%

Showing the 10 largest of 26 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 13, 2026

Company Action Shares changed Value of change % of portfolio
H0 Halo 0 1/4 03/01/27 Exited −111,500,000 −$128M —
I0 Itri 0 03/15/26 Exited −95,000,000 −$101M —
U0 Uber 0 12/15/25 Exited −66,847,000 −$81.6M —
Nutanix Inc New +65,000,000 +$73.2M 5.4%
S0 Spot 0 03/15/26 Exited −53,000,000 −$72.6M —
On Semiconductor Corp Added +57,500,000 +$68.7M 8.8%
Bill Holdings Inc New +73,000,000 +$67.3M 5.0%
D0 Dbx 0 03/01/26 Exited −50,000,000 −$49.5M —
AE Advanced Energy Inds Trimmed −24,735,000 −$40.6M 4.8%
Cloudflare Inc Added +34,000,000 +$39.9M 7.3%

Showing the 10 largest of 28 changes.

Q3 2025

quarter ended September 30, 2025 · filed November 14, 2025

Company Action Shares changed Value of change % of portfolio
L0 Lite 0 1/2 12/15/26 Exited −73,000,000 −$85.8M —
S0 Spot 0 03/15/26 Trimmed −62,500,000 −$85.6M 4.4%
A1 Alny 1 09/15/27 Exited −65,000,000 −$84.6M —
H0 Halo 0 1/4 03/01/27 Added +46,500,000 +$53.4M 7.7%
P1 Pd 1 1/2 10/15/28 Exited −54,001,000 −$51.6M —
F0 Fvrr 0 11/01/25 Exited −50,000,000 −$49M —
O0 On 0 05/01/27 New +42,500,000 +$48.4M 2.9%
V1 Vrns 1 09/15/29 New +35,000,000 +$37.9M 2.3%
S2 Sgh 2 08/15/30 New +30,000,000 +$35.8M 2.1%
S0 Shopcn 0 1/8 11/01/25 Exited −35,000,000 −$35.6M —

Showing the 10 largest of 34 changes.

Q2 2025

quarter ended June 30, 2025 · filed August 14, 2025

Company Action Shares changed Value of change % of portfolio
B1 Bl 1 06/01/29 New +70,000,000 +$74.5M 3.8%
A2 Alrm 2 1/4 06/01/29 New +75,500,000 +$73.4M 3.7%
A1 Akam 1 1/8 02/15/29 New +70,000,000 +$66.5M 3.3%
H0 Halo 0 1/4 03/01/27 New +65,000,000 +$64.7M 3.3%
S0 Sealtd 0 1/4 09/15/26 Trimmed −54,451,000 −$51.4M 3.6%
A0 Alrm 0 01/15/26 Exited −48,000,000 −$46.2M —
I1 Itri 1 3/8 07/15/30 New +33,000,000 +$39.3M 2.0%
N0 Net 0 08/15/26 Trimmed −32,188,000 −$38.1M 2.9%
O0 On 0 1/2 03/01/29 New +40,000,000 +$37.1M 1.9%
D0 Dxcm 0 1/4 11/15/25 Exited −30,000,000 −$29.2M —

Showing the 10 largest of 37 changes.

Q1 2025

quarter ended March 31, 2025 · filed May 15, 2025

Company Action Shares changed Value of change % of portfolio
L1 Luv 1 1/4 05/01/25 Exited −80,000,000 −$82.5M —
A2 Aeis 2 1/2 09/15/28 Added +53,800,000 +$55.3M 4.1%
I0 Ions 0 04/01/26 Exited −50,000,000 −$48.4M —
G2 Gbx 2 7/8 04/15/28 Exited −35,692,000 −$43.2M —
A1 Alny 1 09/15/27 Added +36,500,000 +$42.1M 2.9%
S0 Sq 0 05/01/26 Exited −42,000,000 −$39.1M —
I1 Ions 1 3/4 06/15/28 Exited −38,000,000 −$37.6M —
S0 Sedg 0 09/15/25 Exited −38,000,000 −$35.6M —
D0 Dxcm 0 3/8 05/15/28 Added +39,000,000 +$34.8M 4.1%
P0 Pega 0 3/4 03/01/25 Exited −34,496,000 −$34.2M —

Showing the 10 largest of 40 changes.

Q4 2024

quarter ended December 31, 2024 · filed February 18, 2025

Company Action Shares changed Value of change % of portfolio
S0 Shopcn 0 1/8 11/01/25 New +60,000,000 +$61.2M 3.1%
I3 Idcc 3 1/2 06/01/27 Exited −30,500,000 −$56.6M —
S1 Srpt 1 1/4 09/15/27 Exited −45,000,000 −$51.2M —
A0 Akam 0 3/8 09/01/27 New +48,000,000 +$48.3M 2.4%
U0 Uber 0 7/8 12/01/28 New +43,000,000 +$47.5M 2.4%
B0 Bill 0 04/01/27 Exited −50,000,000 −$44.3M —
D0 Dbx 0 03/01/26 Added +40,000,000 +$39.7M 3.5%
L0 Lite 0 1/2 06/15/28 New +37,146,000 +$36M 1.8%
V2 Veco 2 7/8 06/01/29 Exited −25,000,000 −$34M —
J2 Jazz 2 06/15/26 Added +33,135,000 +$33.6M 2.5%

Showing the 10 largest of 52 changes.

Q3 2024

quarter ended September 30, 2024 · filed November 14, 2024

Company Action Shares changed Value of change % of portfolio
L0 Lite 0 1/2 12/15/26 Added +37,778,000 +$37.2M 3.2%
I0 Itri 0 03/15/26 Added +35,000,000 +$36.6M 3.5%
L1 Luv 1 1/4 05/01/25 Added +34,116,000 +$34.4M 3.5%
P0 Pega 0.75 03/01/25 New +34,496,000 +$33.8M 1.7%
A2 Aeis 2.5 09/15/28 New +29,600,000 +$31.3M 1.6%
Alnylam Pharmaceuticals Inc Exited −26,500,000 −$28.6M —
Array Technologies Inc Exited −32,500,000 −$26.3M —
Exact Sciences Corp Exited −29,500,000 −$25.8M —
Collegium Pharmaceutical Inc Exited −23,000,000 −$25.5M —
T0 Trip 0 1/4 04/01/26 Trimmed −26,500,000 −$24.7M 1.7%

Showing the 10 largest of 46 changes.

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