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Institutional

ARDSLEY ADVISORY PARTNERS LP

CIK 0000900529
$784.4M
Reported AUM
127
Positions
Q1 2026
Period
2026-05-15
Filed

The Brief · ARDSLEY ADVISORY PARTNERS LP · Q1 2026

AI · grounded in 13F

ARDSLEY ADVISORY PARTNERS LP closed its position in FSLR, reducing exposure by $33.3M. The fund established new positions in SPY for $31.9M and UNITED THERAPEUTICS CORP DEL for $29.6M. Additionally, the manager increased share counts in MOD by 2,430.6% and META by 1,300%.

Portfolio · Q1 2026

AVGO$43.2MSNDKAMZNSPYUTHRANETSMTCMODSEZLNVDATEVAMETAOther$477.5MAL

Top holdings

QoQ vs Q4 2025

#StockIssuerPriceDay %1Y Gr.5Y Gr.Value% of bookΔ shares (QoQ)Status
1AVGOBROADCOM INC$385.73-7.92%57.48%771.51%$43.2M5.51%+5,500+4.1%
2SNDKSANDISK CORP$1559.32-11.39%3882.94%3175.19%$35.0M4.46%1,000−1.8%
3AMZNAMAZON COM INC$246.03-3.06%15.20%47.87%$32.1M4.09%+100,000+185.2%
4SPYSTATE STR SPDR S&P 500 ETF T$737.55-2.58%24.51%79.50%$31.9M4.06%+49,000NEW
5UTHRUNITED THERAPEUTICS CORP DEL$549.870.40%68.76%202.24%$29.6M3.78%+50,000NEW
6ANETARISTA NETWORKS INC$154.27-7.07%58.63%548.89%$24.4M3.11%+58,700+41.9%
7SMTCSEMTECH CORP$151.02-10.82%299.00%143.93%$22.2M2.83%+29,750+11.5%
8MODMODINE MFG CO$276.51-8.20%195.35%1552.78%$19.7M2.52%+87,500+2430.6%
9SEZLSEZZLE INC$116.01-4.10%-12.17%7634.00%$19.0M2.42%+45,000+17.6%
10NVDANVIDIA CORPORATION$205.10-6.20%44.92%955.49%$17.0M2.17%27,500−22.0%
11TEVATEVA PHARMACEUTICAL INDS LTD$34.19-0.70%92.40%254.30%$16.7M2.13%25,000−4.3%
12METAMETA PLATFORMS INC$593.00-5.51%-14.74%67.74%$16.0M2.04%+26,000+1300.0%
13RUNSUNRUN INC$13.35-9.89%56.93%-74.79%$15.4M1.96%345,000−23.3%
14WULFTERAWULF INC$24.00-8.36%451.72%29.32%$15.1M1.93%115,000−9.9%
15BTSGBRIGHTSPRING HEALTH SVCS INC$57.400.00%138.08%538.49%$14.9M1.90%HELD
16SHLSSHOALS TECHNOLOGIES GROUP IN$10.81-15.35%109.50%-62.84%$14.9M1.90%+2,235,000+8940.0%
17VIAVVIAVI SOLUTIONS INC$47.56-10.62%403.81%184.96%$13.3M1.70%40,000−9.1%
18BKDBROOKDALE SR LIVING INC$12.343.78%84.73%64.10%$12.9M1.64%+250,000+36.2%
19EBAYEBAY INC.$109.350.18%40.89%74.92%$12.8M1.63%+55,500+65.3%
20EQIXEQUINIX INC$1080.95-0.75%20.90%45.37%$11.7M1.49%+11,950NEW
21AMLPALPS ETF TR$52.77-0.90%17.34%132.43%$10.5M1.34%+200,000NEW
22MUMICRON TECHNOLOGY INC$864.01-13.25%697.79%1041.92%$10.5M1.33%+31,000NEW
23NUNU HLDGS LTD$11.97-1.24%-1.48%61.32%$9.7M1.24%+35,000+5.5%
24BSXBOSTON SCIENTIFIC CORP$48.55-0.61%-52.44%6.47%$9.4M1.20%+150,000NEW
25NOWSERVICENOW INC$112.45-5.79%-45.42%-4.36%$8.8M1.13%+46,150+120.3%
26GOOGALPHABET INC$365.76-0.95%109.82%172.71%$8.6M1.10%27,000−47.4%
27ZNGAZOOM COMMUNICATIONS INC$8.5M1.09%+106,000NEW
28AMATAPPLIED MATLS INC$453.01-9.71%173.68%237.67%$8.5M1.09%+25,000NEW
29LSCCLATTICE SEMICONDUCTOR CORP$135.57-10.76%182.32%138.89%$8.2M1.05%+2,500+2.9%
30BOXBOX INC$26.68-0.34%-28.68%11.54%$7.9M1.01%+336,000NEW
31AGIALAMOS GOLD INC$35.52-8.00%$7.8M0.99%125,000−41.7%
32AAPLAPPLE INC$307.34-1.25%$7.6M0.97%+30,000NEW
33HUTHUT 8 CORP$112.24-12.15%$7.0M0.90%210,000−58.3%
34AVYAVERY DENNISON CORP$155.181.26%$6.9M0.88%+19,000+90.5%
35XLUSELECT SECTOR SPDR TR$44.350.93%$6.9M0.88%+50,000+50.0%
36TWLOTWILIO INC$225.99-4.50%$6.6M0.84%10,300−16.5%
37VZVERIZON COMMUNICATIONS INC$45.371.11%$6.5M0.83%+130,000NEW
38WGSGENEDX HOLDINGS CORP$52.21-7.22%$6.4M0.82%+45,000+81.8%
39CVSCVS HEALTH CORP$95.931.17%$6.1M0.78%HELD
40ALKALASKA AIR GROUP INC$42.820.30%$6.1M0.77%+165,000NEW
41MIRMIRION TECHNOLOGIES INC$17.08-6.26%$6.0M0.77%HELD
42CIFRCIPHER DIGITAL INC$22.45-12.13%$5.8M0.74%+450,000NEW
43OKTAOKTA INC$118.72-3.85%$5.7M0.73%+72,600NEW
44CWENCLEARWAY ENERGY INC$39.74-1.58%$5.5M0.70%10,000−6.7%
45SKESKEENA RES LTD NEW$26.19-11.34%$5.2M0.66%+175,000NEW
46BWXTBWX TECHNOLOGIES INC$5.1M0.65%HELD
47ADIANALOG DEVICES INC$401.39-6.38%$5.1M0.65%+16,000NEW
48XIFRXPLR INFRASTRUCTURE LP$11.62-4.36%$5.0M0.64%+25,000+5.6%
49DNNDENISON MINES CORP$3.03-11.14%$4.9M0.63%2,700,000−65.9%
50LLYELI LILLY & CO$1131.420.55%$4.6M0.59%35,000−87.5%
51LITELUMENTUM HLDGS INC$863.66-8.62%$4.4M0.56%73,800−92.3%
52ATEXANTERIX INC$66.64-1.93%$4.2M0.54%+110,000NEW
53FTNTFORTINET INC$144.68-3.33%$4.1M0.53%+50,600NEW
54VCYTVERACYTE INC$48.73-2.42%$4.0M0.51%HELD
55ROKUROKU INC$122.26-2.65%$3.9M0.50%+32,500+361.1%
56FLRFLUOR CORP$47.56-5.65%$3.8M0.49%+2,514+3.1%
57NFLXNETFLIX INC.$82.180.76%$3.8M0.49%+11,000+37.9%
58ADMAADMA BIOLOGICS INC$7.97-0.13%$3.8M0.49%+425,000NEW
59HONHONEYWELL INTL INC$213.97-1.69%$3.7M0.48%+16,500NEW
60PROFPROFOUND MED CORP$6.66-1.91%$3.7M0.48%+125,000+27.8%
61HPEHEWLETT PACKARD ENTERPRISE C$49.20-8.36%$3.7M0.47%+155,000NEW
62WMBWILLIAMS COS INC$71.96-0.65%$3.6M0.46%HELD
63TACTRANSALTA CORP$12.68-2.16%$3.6M0.46%+95,000+52.8%
64NXENEXGEN ENERGY LTD$10.28-9.90%$3.5M0.44%825,000−73.3%
65ORAORMAT TECHNOLOGIES INC$140.00-1.72%$3.4M0.43%HELD
66ENPHENPHASE ENERGY INC$56.07-18.01%$3.2M0.41%+47,500+126.7%
67INTCINTEL CORP$99.17-11.28%$3.1M0.40%40,000−36.0%
68DOCNDIGITALOCEAN HLDGS INC$169.87-5.89%$3.0M0.38%+35,000NEW
69MSFTMICROSOFT CORP$416.67-2.66%$3.0M0.38%14,200−64.0%
70BRBRBELLRING BRANDS INC$8.770.92%$2.8M0.36%65,000−27.1%
71ARMARM HOLDINGS PLC$342.93-12.84%$2.7M0.35%67,000−78.8%
72FLNCFLUENCE ENERGY INC$22.91-15.62%$2.5M0.32%+185,000NEW
73METCRAMACO RES INC$15.65-8.26%$2.5M0.32%+130,000+433.3%
74TICTIC SOLUTIONS INC$8.38-0.95%$2.5M0.31%+225,000+150.0%
75CCJCAMECO CORP$103.44-9.28%$2.4M0.31%12,500−35.7%
76COHRCOHERENT CORP$376.99-10.64%$2.4M0.30%+3,000+42.9%
77WOLFWOLFSPEED INC$55.06-17.89%$2.3M0.29%25,000−15.2%
78NETCLOUDFLARE INC$250.11-6.90%$2.2M0.28%+10,800NEW
79TERTERADYNE INC$357.93-12.03%$2.2M0.28%52,500−87.5%
80ORNORION GROUP HLDGS INC$13.63-3.95%$2.2M0.28%200,000−50.0%
81XLFSELECT SECTOR SPDR TR$52.300.21%$2.1M0.27%+43,000NEW
82ALDXALDEYRA THERAPEUTICS INC$1.63-7.39%$2.1M0.27%250,000−16.7%
83RSPINVESCO EXCHANGE TRADED FD T$207.83-1.42%$2.1M0.27%+11,000NEW
84AMPXAMPRIUS TECHNOLOGIES INC$19.69-12.64%$2.1M0.27%+125,000NEW
85UPWKUPWORK INC$8.760.23%$2.1M0.27%+190,000NEW
86FFIVF5 INC$393.35-3.75%$2.1M0.26%+7,100NEW
87HASIHA SUSTAINABLE INFRA CAP INC$38.67-3.90%$2.0M0.26%HELD
88DIODDIODES INC$101.06-10.17%$2.0M0.26%+29,500NEW
89UBERUBER TECHNOLOGIES INC$70.71-2.08%$1.8M0.22%+24,500NEW
90BEBLOOM ENERGY CORP$263.61-9.53%$1.8M0.22%38,000−74.5%
91MGNIMAGNITE INC$14.68-1.21%$1.7M0.22%+143,000NEW
92AMDADVANCED MICRO DEVICES INC$466.38-10.86%$1.6M0.21%+8,000NEW
93AEISADVANCED ENERGY INDS$294.81-8.14%$1.6M0.21%68,000−93.2%
94MTZMASTEC INC$363.89-2.89%$1.6M0.21%10,000−66.7%
95EQTEQT CORP$53.75-2.70%$1.6M0.20%HELD
96TASKTASKUS INC$5.74-3.53%$1.6M0.20%+235,000NEW
97EOSEEOS ENERGY ENTERPRISES INC$7.08-12.38%$1.5M0.19%255,000−45.9%
98DTDYNATRACE INC$42.19-2.45%$1.5M0.19%+40,000NEW
99ETENERGY TRANSFER L P$1.4M0.18%+50,000+200.0%
100STKLSUNOPTA INC$6.500.00%$1.4M0.18%470,000−68.1%
101CEGCONSTELLATION ENERGY CORP$1.4M0.18%+5,000NEW
102ITRIITRON INC$1.3M0.17%+1,000+7.1%
103ESOAENERGY SERVICES OF AMER CORP$1.3M0.17%+50,000+100.0%
104MOSMOSAIC CO$1.3M0.16%+50,000NEW
105HIMXHIMAX TECHNOLOGIES INC$1.3M0.16%+159,000NEW
106SPWRSUNPOWER INC$1.2M0.16%+440,000+84.6%
107PIIMPINJ INC$1.2M0.15%+5,000+76.9%
108TXNTEXAS INSTRS INC$1.2M0.15%54,000−90.0%
109RAMPLIVERAMP HLDGS INC$1.1M0.14%+42,000NEW
110CNXCCONCENTRIX CORP$1.1M0.14%+40,000NEW
111LODECOMSTOCK INC$1.1M0.14%+350,000NEW
112DQDAQO NEW ENERGY CORP$1.1M0.14%185,000−78.7%
113PLXSPLEXUS CORP$911K0.12%+4,500NEW
114CRTOCRITEO S A$905K0.12%+50,500NEW
115AMSCAMERICAN SUPERCONDUCTOR CORP$846K0.11%+25,000NEW
116EXLSEXLSERVICE HLDGS INC$761K0.10%+25,000NEW
117MPMP MATERIALS CORP$724K0.09%+15,000NEW
118ARRYARRAY TECHNOLOGIES INC$723K0.09%+75,000+300.0%
119SSENTINELONE INC$592K0.08%+46,000NEW
120DISDISNEY WALT CO$578K0.07%+6,000NEW
121TDCTERADATA CORP DEL$461K0.06%+18,000NEW
122LXULSB INDS INC$373K0.05%+25,000NEW
123IEIVANHOE ELECTRIC INC$296K0.04%+25,000NEW
124FCELFUELCELL ENERGY INC$294K0.04%+45,000NEW
125ALBALBEMARLE CORP$269K0.03%+1,500NEW
126SNAPSNAP INC$230K0.03%380,000−88.4%
127BIOXBIOCERES CROP SOLUTIONS CORP$211K0.03%HELD
128FSLRFIRST SOLAR INC127,500EXITED
129ARGXARGENX SE24,000EXITED
130SLVISHARES SILVER TR295,000EXITED
131TELTE CONNECTIVITY PLC73,500EXITED
132ORCLORACLE CORP78,000EXITED
133CRMSALESFORCE INC51,000EXITED
134PANWPALO ALTO NETWORKS INC69,000EXITED
135SHOPSHOPIFY INC78,400EXITED
136ABNBAIRBNB INC81,000EXITED
137GSMFERROGLOBE PLC2,120,000EXITED
138SMINISHARES TR140,000EXITED
139SANMSANMINA CORPORATION65,200EXITED
140ONTOONTO INNOVATION INC58,500EXITED
141MDBMONGODB INC20,750EXITED
142JAZZJAZZ PHARMACEUTICALS PLC50,000EXITED
143ICLNISHARES TR450,000EXITED
144TTDTHE TRADE DESK INC165,000EXITED
145RHRH30,000EXITED
146THCTENET HEALTHCARE CORP25,000EXITED
147TANINVESCO EXCH TRADED FD TR II100,000EXITED
148OWLBLUE OWL CAPITAL INC325,000EXITED
149DELLDELL TECHNOLOGIES INC36,000EXITED
150BKRBAKER HUGHES COMPANY85,000EXITED
151NOKNOKIA CORP560,000EXITED
152DECKDECKERS OUTDOOR CORP35,000EXITED
153KWEBKRANESHARES TRUST100,000EXITED
154NXPINXP SEMICONDUCTORS N V14,500EXITED
155TRIPTRIPADVISOR INC214,000EXITED
156TET1 ENERGY INC465,000EXITED
157HALHALLIBURTON CO100,000EXITED
158INFYINFOSYS LTD140,000EXITED
159MELIMERCADOLIBRE INC1,200EXITED
160SLNHSOLUNA HOLDINGS INC1,725,000EXITED
161NEENEXTERA ENERGY INC25,000EXITED
162CTSHCOGNIZANT TECHNOLOGY SOLUTIO22,000EXITED
163GLWCORNING INC20,000EXITED
164AFRMAFFIRM HLDGS INC21,000EXITED
165GLBEGLOBAL E ONLINE LTD39,000EXITED
166AMRCAMERESCO INC50,000EXITED
167EPAMEPAM SYS INC7,000EXITED
168CWCURTISS WRIGHT CORP2,500EXITED
169COMPCOMPASS INC100,000EXITED
170UECURANIUM ENERGY CORP75,000EXITED
171AAOIAPPLIED OPTOELECTRONICS INC25,000EXITED
172MRVLMARVELL TECHNOLOGY INC10,000EXITED
173VSTVISTRA CORP5,000EXITED
174XMTRXOMETRY INC10,000EXITED
175WRBYWARBY PARKER INC26,500EXITED
176AAONAAON INC3,000EXITED
177NFENEW FORTRESS ENERGY INC150,000EXITED

Source: SEC EDGAR · accession 0001172661-26-002039. 13F discloses long positions only — shorts, foreign equities, and options are excluded.