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ION Fund Management Portfolio holdings

AUM $1.58B
This Fund
S&P 500
This Quarter Est. Return
+26.9%
1 Year Est. Return
–
3 Year Est. Return
–
5 Year Est. Return
–
10 Year Est. Return
–
AUM
$707M
AUM Growth
-$151M
Cap. Flow
-$251M
Cap. Flow %
-35.49%
Top 10 Hldgs %
67.45%
Holding
78
New
16
Increased
11
Reduced
18
Closed
16

Top Buys

Rank Stock Value
1
SHC icon
Sotera Health
SHC
+$19.6M
2
UCTT
Ultra Clean Holdings
UCTT
+$17.9M
3
FLS icon
Flowserve
FLS
+$15.6M
4
FLR icon
Fluor
FLR
+$13.9M
5
SEDG icon
SolarEdge
SEDG
+$11.6M

Top Sells

Rank Stock Value
1
CHKP icon
Check Point Software Technologies
CHKP
+$38.2M
2
TEAM icon
Atlassian
TEAM
+$37.4M
3
CSGP icon
CoStar Group
CSGP
+$31M
4
SLV icon
iShares Silver Trust
SLV
+$24.7M
5
PRGO icon
Perrigo
PRGO
+$24.5M

Sector Composition

Rank Sector Weight
1 Healthcare 25.68%
2 Technology 21.02%
3 Energy 19.05%
4 Industrials 17.35%
5 Consumer Discretionary 6.32%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TEVA icon
1
Teva Pharmaceuticals
TEVA
$44.4B
$116M 16.45%
3,859,443
-190,557
-5% -$6.13M
DK icon
2
Delek US
DK
$4.14B
$61.7M 8.74%
1,370,000
-397,601
-22% -$14.2M
SEDG icon
3
SolarEdge
SEDG
$1.84B
$56.3M 7.97%
1,103,690
+307,690
+39% +$11.6M
ILMN icon
4
Illumina
ILMN
$34B
$48.1M 6.81%
390,200
+58,200
+18% +$7.64M
DAC icon
5
Danaos Corp
DAC
$2.78B
$42.9M 6.07%
381,122
-38,693
-9% -$4.13M
PHIN icon
6
Phinia Inc
PHIN
$2.6B
$34.9M 4.94%
510,000
-5,000
-1% -$349K
NXE icon
7
NexGen Energy
NXE
$7.52B
$30.4M 4.3%
2,618,200
+621,260
+31% +$7.42M
RIG icon
8
Transocean
RIG
$6.42B
$29.8M 4.21%
4,488,400
+92,277
+2% +$520K
NMM icon
9
Navios Maritime Partners
NMM
$2.58B
$29.1M 4.12%
430,944
-35,056
-8% -$2.18M
VALE icon
10
CALL
Vale
VALE
$65.2B
$27.1M 3.84%
1,706,000
-601,100
-26% -$9.38M
Q
11
Qnity Electronics Inc
Q
$26.5B
$25.6M 3.62%
221,600
+17,300
+8% +$1.84M
UCTT
12
Ultra Clean Holdings
UCTT
$3.32B
$21.8M 3.08%
+349,852
New +$17.9M
AER icon
13
AerCap
AER
$23.2B
$17.1M 2.43%
125,000
-140,000
-53% -$20M
SHC icon
14
Sotera Health
SHC
$5.57B
$17.1M 2.42%
1,193,390
+1,183,390
+11,834% +$19.6M
FLS icon
15
Flowserve
FLS
$10.2B
$14.5M 2.05%
+197,000
New +$15.6M
FLR icon
16
Fluor
FLR
$6.86B
$14M 1.98%
+299,200
New +$13.9M
PBR icon
17
CALL
Petrobras
PBR
$115B
$12.4M 1.76%
+600,000
New +$9.6M
CRWV
18
PUT
CoreWeave
CRWV
$48.6B
$11.4M 1.61%
146,900
– –
CIEN icon
19
Ciena
CIEN
$54.9B
$10.7M 1.52%
27,665
-48,335
-64% -$14.8M
TTMI icon
20
TTM Technologies
TTMI
$11.8B
$9.74M 1.38%
100,000
-40,000
-29% -$3.81M
ONTO icon
21
Onto Innovation
ONTO
$17.8B
$6.15M 0.87%
+30,000
New +$6.14M
AMZN icon
22
Amazon
AMZN
$2.82T
$5M 0.71%
24,000
+4,000
+20% +$881K
XYZ
23
Block Inc
XYZ
$49.7B
$4.81M 0.68%
80,000
-100,000
-56% -$6.08M
GLBE icon
24
Global E Online
GLBE
$6.62B
$4.78M 0.68%
155,000
+55,000
+55% +$1.93M
CHKP icon
25
Check Point Software Technologies
CHKP
$13.2B
$3.71M 0.53%
26,000
-228,122
-90% -$38.2M
1
2 3 4

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ION Fund Management's Q1 2026 Portfolio in Review

As of Q1 2026, ION Fund Management held 78 positions worth $707M, down 18% from $857M the previous quarter. Its ten largest holdings account for 67% of the portfolio.

ION Fund Management withdrew a net $251M in Q1 2026, closing 16 positions and reducing 18 holdings. Its most notable exit was Atlassian, an estimated $37.4M position sold in full.

By sector, the portfolio is most concentrated in Healthcare at 26% of assets, up from 23% a quarter earlier, followed by Technology and Energy.

Against the trend, ION Fund Management opened a new position in Ultra Clean Holdings worth $21.8M.

  • ION Fund Management's largest Q1 2026 buy was Ultra Clean Holdings: 349,852 shares worth $21.8M.
  • ION Fund Management added most to Sotera Health in Q1 2026, an estimated $19.6M increase.
  • ION Fund Management's biggest Q1 2026 reduction was Check Point Software Technologies, cutting an estimated $38.2M.
  • ION Fund Management fully exited Atlassian in Q1 2026, selling an estimated $37.4M.
  • ION Fund Management's ten largest holdings make up 67% of its $707M portfolio in Q1 2026.
  • ION Fund Management opened 16 new positions and closed 16 in Q1 2026.
  • ION Fund Management's portfolio value fell 18% quarter-over-quarter to $707M.

Based on ION Fund Management's 13F filing for Q1 2026, filed 15 May 2026.