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Ardsley Advisory Partners Portfolio holdings

AUM $960M
1-Year Est. Return 207.76%
This Fund
S&P 500
This Quarter Est. Return
+11.5%
1 Year Est. Return
+207.76%
3 Year Est. Return
+554.53%
5 Year Est. Return
+728.66%
10 Year Est. Return
+4,084.52%
AUM
$784M
AUM Growth
-$127M
Cap. Flow
-$154M
Cap. Flow %
-19.68%
Top 10 Hldgs %
29.92%
Holding
214
New
72
Increased
33
Reduced
34
Closed
63

Top Buys

Rank Stock Value
1
UTHR icon
United Therapeutics
UTHR
+$24.9M
2
SHLS icon
Shoals Technologies Group
SHLS
+$18.3M
3
META icon
Meta Platforms (Facebook)
META
+$16.7M
4
MOD icon
Modine Manufacturing
MOD
+$16.5M
5
BSX icon
Boston Scientific
BSX
+$12M

Top Sells

Rank Stock Value
1
LITE icon
Lumentum
LITE
+$40.5M
2
LLY icon
Eli Lilly
LLY
+$35.5M
3
FSLR icon
First Solar
FSLR
+$30.7M
4
ARGX icon
argenx
ARGX
+$20.2M
5
AEIS icon
Advanced Energy
AEIS
+$19.7M

Sector Composition

Rank Sector Weight
1 Technology 33.08%
2 Healthcare 13.31%
3 Consumer Discretionary 7.84%
4 Financials 6.74%
5 Communication Services 6.07%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
XIFR
51
XPLR Infrastructure LP
XIFR
$1.11B
$5.04M 0.64%
475,000
+25,000
+6% +$257K
DNN icon
52
Denison Mines
DNN
$2.45B
$4.94M 0.63%
1,400,000
-2,700,000
-66% -$10.1M
MU icon
53
Micron Technology
MU
$906B
$4.73M 0.6%
+14,000
New +$5.48M
LLY icon
54
Eli Lilly
LLY
$1.09T
$4.6M 0.59%
5,000
-35,000
-88% -$35.5M
LITE icon
55
Lumentum
LITE
$48.6B
$4.36M 0.56%
6,200
-73,800
-92% -$40.5M
ATEX icon
56
Anterix
ATEX
$1.7B
$4.2M 0.54%
+110,000
New +$3.48M
VCYT icon
57
Veracyte
VCYT
$4.46B
$4.03M 0.51%
125,000
– –
ROKU icon
58
Roku
ROKU
$21.4B
$3.93M 0.5%
41,500
+32,500
+361% +$3.17M
EQIX icon
59
CALL
Equinix
EQIX
$101B
$3.92M 0.5%
+4,000
New +$3.56M
FLR icon
60
Fluor
FLR
$6.72B
$3.85M 0.49%
82,500
+2,514
+3% +$117K
NFLX icon
61
Netflix
NFLX
$300B
$3.85M 0.49%
40,000
+34,000
+567% +$3M
ADMA icon
62
ADMA Biologics
ADMA
$2B
$3.83M 0.49%
+425,000
New +$6.71M
HON icon
63
Honeywell
HON
$77B
$3.73M 0.48%
+16,500
New +$3.77M
PROF
64
Profound Medical
PROF
$262M
$3.73M 0.48%
575,000
+125,000
+28% +$863K
HPE icon
65
PUT
Hewlett Packard
HPE
$60.6B
$3.69M 0.47%
+155,000
New +$3.43M
WMB icon
66
Williams Companies
WMB
$86.7B
$3.64M 0.46%
50,000
– –
TAC icon
67
TransAlta
TAC
$3.96B
$3.62M 0.46%
275,000
+95,000
+53% +$1.22M
NXE icon
68
NexGen Energy
NXE
$6.06B
$3.48M 0.44%
300,000
-825,000
-73% -$9.85M
BKD icon
69
Brookdale Senior Living
BKD
$3.64B
$3.42M 0.44%
+250,000
New +$3.5M
ORA icon
70
Ormat Technologies
ORA
$5.94B
$3.36M 0.43%
30,000
– –
ENPH icon
71
Enphase Energy
ENPH
$4.84B
$3.21M 0.41%
85,000
+47,500
+127% +$1.97M
ANET icon
72
CALL
Arista Networks
ANET
$208B
$3.07M 0.39%
25,000
-15,000
-38% -$2.01M
DOCN icon
73
PUT
DigitalOcean
DOCN
$12.8B
$3M 0.38%
+35,000
New +$2.21M
MSFT icon
74
Microsoft
MSFT
$2.91T
$2.96M 0.38%
8,000
-14,200
-64% -$5.94M
BRBR icon
75
BellRing Brands
BRBR
$1.55B
$2.82M 0.36%
175,000
-65,000
-27% -$1.32M
1 2
3
4 5

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Ardsley Advisory Partners's Q1 2026 Portfolio in Review

As of Q1 2026, Ardsley Advisory Partners held 214 positions worth $784M, down 14% from $911M the previous quarter. Its ten largest holdings account for 30% of the portfolio.

Ardsley Advisory Partners withdrew a net $154M in Q1 2026, closing 63 positions and reducing 34 holdings. Its most notable exit was First Solar, an estimated $30.7M position sold in full.

By sector, the portfolio is most concentrated in Technology at 33% of assets, down from 37% a quarter earlier, followed by Healthcare and Consumer Discretionary.

Against the trend, Ardsley Advisory Partners opened a new position in United Therapeutics worth $29.6M.

  • Ardsley Advisory Partners's largest Q1 2026 buy was United Therapeutics: 50,000 shares worth $29.6M.
  • Ardsley Advisory Partners added most to Shoals Technologies Group in Q1 2026, an estimated $18.3M increase.
  • Ardsley Advisory Partners's biggest Q1 2026 reduction was Lumentum, cutting an estimated $40.5M.
  • Ardsley Advisory Partners fully exited First Solar in Q1 2026, selling an estimated $30.7M.
  • Ardsley Advisory Partners's ten largest holdings make up 30% of its $784M portfolio in Q1 2026.
  • Ardsley Advisory Partners opened 72 new positions and closed 63 in Q1 2026.
  • Ardsley Advisory Partners's portfolio value fell 14% quarter-over-quarter to $784M.

Based on Ardsley Advisory Partners's 13F filing for Q1 2026, filed 15 May 2026.