Adage Capital Partners
MPWR icon

Adage Capital Partners’s Monolithic Power Systems MPWR Stock Holding History

Adage Capital Partners’s Portfolio MPWR Stock Details MPWR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$80.5M Sell
73,652
-4,200
-5% -$4.59M 0.12% 165
2025
Q4 		$70.6M Sell
77,852
-5,300
-6% -$5.1M 0.11% 184
2025
Q3 		$76.6M Buy
83,152
+7,200
+9% +$5.84M 0.12% 165
2025
Q2 		$55.5M Sell
75,952
-40,148
-35% -$25.6M 0.09% 212
2025
Q1 		$67.3M Buy
116,100
+22,500
+24% +$14.2M 0.12% 162
2024
Q4 		$55.4M Buy
93,600
+22,600
+32% +$16.4M 0.1% 201
2024
Q3 		$65.6M Buy
71,000
+29,300
+70% +$25.3M 0.12% 190
2024
Q2 		$34.3M Sell
41,700
-400
-1% -$289K 0.06% 301
2024
Q1 		$28.5M Sell
42,100
-4,400
-9% -$2.94M 0.05% 366
2023
Q4 		$29.3M Sell
46,500
-1,000
-2% -$522K 0.06% 326
2023
Q3 		$21.9M Buy
47,500
+12,600
+36% +$6.45M 0.05% 369
2023
Q2 		$18.9M Sell
34,900
-9,900
-22% -$4.7M 0.04% 423
2023
Q1 		$22.4M Buy
44,800
+10,400
+30% +$4.78M 0.05% 383
2022
Q4 		$12.2M Sell
34,400
-10,900
-24% -$3.92M 0.03% 586
2022
Q3 		$16.5M Sell
45,300
-23,285
-34% -$10.4M 0.04% 480
2022
Q2 		$26.3M Sell
68,585
-19,500
-22% -$8.24M 0.06% 335
2022
Q1 		$42.8M Sell
88,085
-7,715
-8% -$3.36M 0.08% 256
2021
Q4 		$47.3M Buy
95,800
+24,800
+35% +$12.8M 0.09% 239
2021
Q3 		$34.4M Buy
71,000
+24,300
+52% +$11.1M 0.07% 292
2021
Q2 		$17.4M Buy
46,700
+8,900
+24% +$3.13M 0.03% 522
2021
Q1 		$13.4M Buy
+37,800
New +$13.8M 0.03% 588
2020
Q2 		– Sell
-158,000
Closed -$26.5M – 778
2020
Q1 		$26.5M Buy
158,000
+91,000
+136% +$15.6M 0.08% 265
2019
Q4 		$11.9M Buy
+67,000
New +$10.7M 0.03% 505
2019
Q1 		– Sell
-101,868
Closed -$11.8M – 721
2018
Q4 		$11.8M Buy
+101,868
New +$12.2M 0.03% 466
2018
Q3 		– Sell
-88,605
Closed -$11.8M – 740
2018
Q2 		$11.8M Buy
88,605
+5,000
+6% +$637K 0.03% 531
2018
Q1 		$9.68M Buy
83,605
+12,676
+18% +$1.5M 0.02% 559
2017
Q4 		$7.97M Buy
70,929
+15,000
+27% +$1.74M 0.02% 593
2017
Q3 		$5.96M Sell
55,929
-95,000
-63% -$9.65M 0.01% 614
2017
Q2 		$14.6M Sell
150,929
-29,000
-16% -$2.76M 0.04% 491
2017
Q1 		$16.6M Sell
179,929
-544,165
-75% -$48.2M 0.04% 440
2016
Q4 		$59.3M Sell
724,094
-83,395
-10% -$6.7M 0.16% 174
2016
Q3 		$65M Sell
807,489
-276,367
-25% -$20.4M 0.18% 144
2016
Q2 		$74M Sell
1,083,856
-199,220
-16% -$13M 0.2% 140
2016
Q1 		$81.7M Buy
1,283,076
+835,200
+186% +$49.8M 0.22% 128
2015
Q4 		$28.5M Sell
447,876
-1,927,499
-81% -$120M 0.07% 297
2015
Q3 		$122M Buy
2,375,375
+218,593
+10% +$10.8M 0.34% 76
2015
Q2 		$109M Buy
2,156,782
+559,265
+35% +$29.6M 0.27% 104
2015
Q1 		$84.1M Sell
1,597,517
-395,952
-20% -$20M 0.21% 146
2014
Q4 		$99.2M Buy
1,993,469
+70,001
+4% +$3.14M 0.24% 113
2014
Q3 		$84.7M Sell
1,923,468
-141,194
-7% -$6.21M 0.21% 129
2014
Q2 		$87.4M Sell
2,064,662
-109,627
-5% -$4.25M 0.23% 124
2014
Q1 		$84.3M Buy
2,174,289
+101,864
+5% +$3.59M 0.23% 131
2013
Q4 		$71.8M Buy
2,072,425
+348,207
+20% +$11.1M 0.19% 152
2013
Q3 		$52.2M Sell
1,724,218
-1,122,894
-39% -$31.5M 0.15% 184
2013
Q2 		$68.6M Buy
+2,847,112
New +$67.6M 0.21% 142

Other funds holding MPWR

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $408B AUM 30.18% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

Adage Capital Partners's MPWR Position: Q1 2026 in Review

Adage Capital Partners reduced its Monolithic Power Systems (MPWR) stake by 5.4% in Q1 2026, selling an estimated $4.59M and leaving 73,652 shares worth $80.5M. The position accounts for 0.12% of the portfolio, ranked #165.

Adage Capital Partners first reported a position in MPWR in Q2 2013 and has held it in 45 quarters since. The position peaked at $122M in Q3 2015. 1,114 funds tracked by Wall St. Rank hold MPWR as of Q1 2026.

  • Adage Capital Partners held 73,652 shares of Monolithic Power Systems worth $80.5M as of Q1 2026.
  • Adage Capital Partners sold 4,200 Monolithic Power Systems shares in Q1 2026, an estimated $4.59M.
  • Monolithic Power Systems made up 0.12% of Adage Capital Partners's portfolio in Q1 2026, its #165 holding.
  • Adage Capital Partners first reported a position in Monolithic Power Systems in Q2 2013 and has held it in 45 quarters since.
  • Adage Capital Partners's Monolithic Power Systems position peaked at $122M in Q3 2015.
  • 1,114 funds tracked by Wall St. Rank held Monolithic Power Systems as of Q1 2026.

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