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WH

William Harnisch Peconic Partners

AUM $8.04B
1-Year Est. Return 107.18%
 

William Harnisch is the founder of Peconic Partners, a concentrated investment firm known for high-conviction equity positions. The firm’s portfolio often differs sharply from broad market benchmarks, reflecting a willingness to concentrate capital. Harnisch’s disclosures are tracked by investors interested in bold, research-driven concentration.

This Fund
S&P 500
This Quarter Est. Return
+20.05%
1 Year Est. Return
+107.18%
3 Year Est. Return
+300.02%
5 Year Est. Return
+691.8%
10 Year Est. Return
+3,202.62%
AUM
$953M
AUM Growth
+$119M
Cap. Flow
-$30M
Cap. Flow %
-3.15%
Top 10 Hldgs %
92.64%
Holding
79
New
12
Increased
11
Reduced
10
Closed
22

Top Buys

Rank Stock Value
1
CLF icon
Cleveland-Cliffs
CLF
+$25.2M
2
PWR icon
Quanta Services
PWR
+$23.2M
3
DY icon
Dycom Industries
DY
+$19.1M
4
SLAB icon
Silicon Laboratories
SLAB
+$11.5M
5
FCX icon
Freeport-McMoran
FCX
+$10.4M

Top Sells

Rank Stock Value
1
GM icon
General Motors
GM
+$32.3M
2
LNG icon
Cheniere Energy
LNG
+$25M
3
EOG icon
EOG Resources
EOG
+$15.6M
4
LVS icon
Las Vegas Sands
LVS
+$11.6M
5
LUV icon
Southwest Airlines
LUV
+$7.92M

Sector Composition

Rank Sector Weight
1 Industrials 79.57%
2 Materials 8.37%
3 Technology 2.84%
4 Real Estate 2.56%
5 Communication Services 2.17%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
XLE icon
26
State Street Energy Select Sector SPDR ETF
XLE
$41.7B
$491K 0.05%
+20,000
New +$461K
AAPL icon
27
Apple
AAPL
$4.51T
$489K 0.05%
4,000
– –
REGN icon
28
Regeneron Pharmaceuticals
REGN
$85.9B
$473K 0.05%
1,000
– –
PPLI
29
People Inc
PPLI
$2.86B
$433K 0.05%
3,664
– –
PRIM icon
30
Primoris Services
PRIM
$4.15B
$414K 0.04%
12,500
-12,500
-50% -$411K
EQIX icon
31
Equinix
EQIX
$105B
$408K 0.04%
600
– –
DIS icon
32
Walt Disney
DIS
$186B
$399K 0.04%
+2,165
New +$399K
NEE icon
33
NextEra Energy
NEE
$174B
$393K 0.04%
5,200
-5,000
-49% -$390K
IDXX icon
34
Idexx Laboratories
IDXX
$43.9B
$391K 0.04%
800
– –
SHOP icon
35
Shopify
SHOP
$192B
$387K 0.04%
3,500
– –
EOG icon
36
EOG Resources
EOG
$80.3B
$363K 0.04%
5,000
-245,000
-98% -$15.6M
AMT icon
37
American Tower
AMT
$81.9B
$359K 0.04%
1,500
– –
WTER
38
DELISTED
The Alkaline Water Company Inc. Common Stock
WTER
$327K 0.03%
20,000
– –
APHA
39
DELISTED
Aphria Inc. Common Shares
APHA
$276K 0.03%
15,000
-10,000
-40% -$162K
SPLK
40
DELISTED
Splunk Inc
SPLK
$271K 0.03%
2,000
– –
GOOGL icon
41
Alphabet (Google) Class A
GOOGL
$4.22T
$258K 0.03%
2,500
-30,000
-92% -$2.96M
IWM icon
42
iShares Russell 2000 ETF
IWM
$81.9B
$243K 0.03%
1,100
-1,600
-59% -$349K
YOLO icon
43
AdvisorShares Pure Cannabis ETF
YOLO
$35.9M
$236K 0.02%
10,000
– –
SWN
44
DELISTED
Southwestern Energy Company
SWN
$233K 0.02%
+50,000
New +$202K
VTRS icon
45
Viatris
VTRS
$18.7B
$210K 0.02%
15,000
– –
FANG icon
46
Diamondback Energy
FANG
$59B
$184K 0.02%
+2,500
New +$171K
VZ icon
47
Verizon
VZ
$205B
$174K 0.02%
3,000
– –
ZTS icon
48
Zoetis
ZTS
$32.1B
$157K 0.02%
1,000
– –
VMC icon
49
Vulcan Materials
VMC
$35.8B
$135K 0.01%
800
– –
CONE
50
DELISTED
CyrusOne Inc Common Stock
CONE
$135K 0.01%
2,000
– –
1
2
3 4

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William Harnisch's Q1 2021 Portfolio in Review

As of Q1 2021, William Harnisch held 79 positions worth $953M, up 14% from $834M the previous quarter. Its ten largest holdings account for 93% of the portfolio.

William Harnisch withdrew a net $30M in Q1 2021, closing 22 positions and reducing 10 holdings. Its most notable exit was Cheniere Energy, an estimated $25M position sold in full.

By sector, the portfolio is most concentrated in Industrials at 80% of assets, up from 72% a quarter earlier, followed by Materials and Technology.

Against the trend, William Harnisch opened a new position in Silicon Laboratories worth $11.3M.

  • William Harnisch's largest Q1 2021 buy was Silicon Laboratories: 80,104 shares worth $11.3M.
  • William Harnisch added most to Cleveland-Cliffs in Q1 2021, an estimated $25.2M increase.
  • William Harnisch's biggest Q1 2021 reduction was General Motors, cutting an estimated $32.3M.
  • William Harnisch fully exited Cheniere Energy in Q1 2021, selling an estimated $25M.
  • William Harnisch's ten largest holdings make up 93% of its $953M portfolio in Q1 2021.
  • William Harnisch opened 12 new positions and closed 22 in Q1 2021.
  • William Harnisch's portfolio value rose 14% quarter-over-quarter to $953M.

Based on Peconic Partners's 13F filing for Q1 2021, filed 17 May 2021.