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PDT Partners’s Inspire Medical Systems INSP Stock Holding History

PDT Partners’s Portfolio INSP Stock Details INSP Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-4,800
Closed -$443K – 569
2025
Q4 		$443K Buy
+4,800
New +$459K 0.03% 439
2025
Q2 		– Sell
-18,044
Closed -$2.87M – 763
2025
Q1 		$2.87M Buy
18,044
+2
+0% +$362 0.2% 173
2024
Q4 		$3.34M Sell
18,042
-5,345
-23% -$1.04M 0.3% 111
2024
Q3 		$4.94M Buy
+23,387
New +$4.06M 0.44% 30
2023
Q3 		– Sell
-3,098
Closed -$1.01M – 633
2023
Q2 		$1.01M Sell
3,098
-12,130
-80% -$3.47M 0.14% 248
2023
Q1 		$3.56M Sell
15,228
-2,625
-15% -$664K 0.48% 41
2022
Q4 		$4.5M Buy
17,853
+6,070
+52% +$1.29M 0.73% 2
2022
Q3 		$2.09M Buy
11,783
+2,750
+30% +$553K 0.32% 60
2022
Q2 		$1.65M Buy
9,033
+214
+2% +$42.7K 0.15% 221
2022
Q1 		$2.26M Sell
8,819
-8,567
-49% -$1.96M 0.19% 143
2021
Q4 		$4M Sell
17,386
-6,714
-28% -$1.64M 0.3% 92
2021
Q3 		$5.61M Sell
24,100
-1,931
-7% -$403K 0.4% 37
2021
Q2 		$5.03M Buy
26,031
+20,931
+410% +$4.15M 0.33% 69
2021
Q1 		$1.06M Buy
5,100
+1,342
+36% +$285K 0.08% 363
2020
Q4 		$707K Buy
+3,758
New +$614K 0.05% 389
2020
Q1 		– Sell
-5,186
Closed -$385K – 752
2019
Q4 		$385K Buy
+5,186
New +$333K 0.02% 485

Other funds holding INSP

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
DM
Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
D.E. Shaw & Co
D.E. Shaw & Co New York $210B AUM 57.28% 1-Year Est. Return
William Blair Investment Management
William Blair Investment Management Chicago, Illinois $33.3B AUM 44.76% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Artisan Partners
Artisan Partners Milwaukee, Wisconsin $63.1B AUM 35.51% 1-Year Est. Return

PDT Partners's INSP Position: Q1 2026 in Review

PDT Partners sold out of Inspire Medical Systems (INSP) in Q1 2026, closing a stake of 4,800 shares — an estimated $443K sold.

PDT Partners first reported a position in INSP in Q4 2019 and held it in 16 quarters. The position peaked at $5.61M in Q3 2021. 301 funds tracked by Wall St. Rank hold INSP as of Q1 2026.

  • PDT Partners reported no remaining Inspire Medical Systems position as of Q1 2026 after selling out during the quarter.
  • PDT Partners sold 4,800 Inspire Medical Systems shares in Q1 2026, an estimated $443K.
  • PDT Partners first reported a position in Inspire Medical Systems in Q4 2019 and held it in 16 quarters.
  • PDT Partners's Inspire Medical Systems position peaked at $5.61M in Q3 2021.
  • 301 funds tracked by Wall St. Rank held Inspire Medical Systems as of Q1 2026.

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