William Harnisch Peconic Partners
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
MasTec
MTZ
|
+$51.2M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$33.9M |
| 3 |
Dycom Industries
DY
|
+$31.2M |
| 4 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$3.07M |
| 5 |
Freeport-McMoran
FCX
|
+$2.28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
McDonald's
MCD
|
+$25.1M |
| 2 |
Williams Companies
WMB
|
+$10.4M |
| 3 |
SWN
Southwestern Energy Company
SWN
|
+$9.7M |
| 4 |
Energy Transfer Partners
ET
|
+$9.58M |
| 5 |
Silicon Laboratories
SLAB
|
+$7.34M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Industrials | 92.92% |
| 2 | Real Estate | 2.37% |
| 3 | Materials | 0.38% |
| 4 | Technology | 0.33% |
| 5 | Energy | 0.3% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
Quanta Services
PWR
$96.1B
| $634M | 50.97% |
5,530,711
-33,900
| -0.6% | -$3.91M |
|
|
WCC
2
WESCO International
WCC
$17B
| $253M | 20.36% |
1,924,881
+10,000
| +0.5% | +$1.28M |
|
|
3
Dycom Industries
DY
$11.8B
| $138M | 11.06% |
1,468,230
+369,003
| +34% | +$31.2M |
|
|
4
MasTec
MTZ
$21.4B
| $131M | 10.53% |
1,419,139
+560,000
| +65% | +$51.2M |
|
|
5
iShares Russell 2000 ETF
IWM
$81.9B
| $33.4M | 2.68% |
+150,000
| New | +$33.9M |
|
6
SBA Communications
SBAC
$19.4B
| $28.1M | 2.25% |
72,109
-1,665
| -2% | -$585K |
|
7
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$311M
| $4.22M | 0.34% |
250,000
| – | – |
|
8
NXP Semiconductors
NXPI
$56.9B
| $3.42M | 0.27% |
15,000
+5,000
| +50% | +$1.06M |
|
|
9
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.93B
| $2.88M | 0.23% |
+30,000
| New | +$3.07M |
|
|
10
Freeport-McMoran
FCX
$110B
| $2.5M | 0.2% |
+60,000
| New | +$2.28M |
|
|
ARCH
11
DELISTED
Arch Resources, Inc.
ARCH
| $1.37M | 0.11% |
15,000
| – | – |
|
12
Chevron
CVX
$403B
| $1.17M | 0.09% |
10,000
| – | – |
|
13
Teck Resources
TECK
$33.9B
| $1.15M | 0.09% |
40,000
-10,000
| -20% | -$274K |
|
14
iShares Biotechnology ETF
IBB
$10.7B
| $1.15M | 0.09% |
7,500
| – | – |
|
15
Diamondback Energy
FANG
$59B
| $1.08M | 0.09% |
10,000
| – | – |
|
16
Crown Castle
CCI
$32.1B
| $861K | 0.07% |
4,126
-13,374
| -76% | -$2.47M |
|
|
XIFR
17
XPLR Infrastructure LP
XIFR
$1.05B
| $844K | 0.07% |
10,000
-10,000
| -50% | -$837K |
|
18
Alpha Metallurgical Resources
AMR
$2.66B
| $611K | 0.05% |
10,000
+7,295
| +270% | +$405K |
|
19
General Motors
GM
$77.2B
| $586K | 0.05% |
10,000
| – | – |
|
20
NextEra Energy
NEE
$174B
| $485K | 0.04% |
5,200
| – | – |
|
|
21
McDonald's
MCD
$192B
| $462K | 0.04% |
1,725
-99,440
| -98% | -$25.1M |
|
22
Walt Disney
DIS
$186B
| $460K | 0.04% |
2,970
| – | – |
|
23
Apple
AAPL
$4.51T
| $391K | 0.03% |
2,200
-1,800
| -45% | -$284K |
|
|
WTER
24
DELISTED
The Alkaline Water Company Inc. Common Stock
WTER
| $354K | 0.03% |
20,000
| – | – |
|
25
Idexx Laboratories
IDXX
$43.9B
| $290K | 0.02% |
440
-360
| -45% | -$226K |
|
Similar funds
William Harnisch's Q4 2021 Portfolio in Review
As of Q4 2021, William Harnisch held 54 positions worth $1.24B, up 10% from $1.13B the previous quarter. Its ten largest holdings account for 99% of the portfolio.
William Harnisch deployed $41.4M of net new capital in Q4 2021, opening 6 new positions and adding to 7 existing holdings. Its largest new stake was iShares Russell 2000 ETF: 150,000 shares worth $33.4M.
By sector, the portfolio is most concentrated in Industrials at 93% of assets, up from 89% a quarter earlier, followed by Real Estate and Materials.
On the sell side, the largest reduction was McDonald's, an estimated $25.1M trimmed.
- William Harnisch's largest Q4 2021 buy was iShares Russell 2000 ETF: 150,000 shares worth $33.4M.
- William Harnisch added most to MasTec in Q4 2021, an estimated $51.2M increase.
- William Harnisch's biggest Q4 2021 reduction was McDonald's, cutting an estimated $25.1M.
- William Harnisch fully exited Williams Companies in Q4 2021, selling an estimated $10.4M.
- William Harnisch's ten largest holdings make up 99% of its $1.24B portfolio in Q4 2021.
- William Harnisch opened 6 new positions and closed 12 in Q4 2021.
- William Harnisch's portfolio value rose 10% quarter-over-quarter to $1.24B.
Based on Peconic Partners's 13F filing for Q4 2021, filed 14 Feb 2022.