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
|
+$55.3M |
| 2 |
McDonald's
MCD
|
+$24.1M |
| 3 |
Williams Companies
WMB
|
+$10.1M |
| 4 |
Energy Transfer Partners
ET
|
+$9.6M |
| 5 |
Dycom Industries
DY
|
+$8.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Cleveland-Cliffs
CLF
|
+$71.9M |
| 2 |
ExxonMobil
XOM
|
+$25.2M |
| 3 |
Cracker Barrel
CBRL
|
+$11.4M |
| 4 |
Quanta Services
PWR
|
+$10.4M |
| 5 |
Silicon Laboratories
SLAB
|
+$8.67M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Industrials | 89.32% |
| 2 | Energy | 3.13% |
| 3 | Real Estate | 2.52% |
| 4 | Consumer Discretionary | 2.21% |
| 5 | Technology | 0.93% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Quanta Services
PWR
$96.1B
| $633M | 56.2% |
5,564,611
-104,043
| -2% | -$10.4M |
|
|
WCC
2
WESCO International
WCC
$17B
| $221M | 19.59% |
1,914,881
+45,197
| +2% | +$4.98M |
|
|
3
Dycom Industries
DY
$11.8B
| $78.3M | 6.95% |
1,099,227
+125,843
| +13% | +$8.9M |
|
|
4
MasTec
MTZ
$21.4B
| $74.1M | 6.58% |
859,139
+582,618
| +211% | +$55.3M |
|
|
5
McDonald's
MCD
$192B
| $24.4M | 2.16% |
101,165
+100,820
| +29,223% | +$24.1M |
|
6
SBA Communications
SBAC
$19.4B
| $24.4M | 2.16% |
73,774
| – | – |
|
|
7
Williams Companies
WMB
$86.2B
| $10.4M | 0.92% |
+400,000
| New | +$10.1M |
|
|
SWN
8
DELISTED
Southwestern Energy Company
SWN
| $9.7M | 0.86% |
1,750,000
+1,700,000
| +3,400% | +$8.3M |
|
|
9
Energy Transfer Partners
ET
$73B
| $9.58M | 0.85% |
+1,000,000
| New | +$9.6M |
|
|
10
Silicon Laboratories
SLAB
$7.27B
| $7.34M | 0.65% |
52,342
-57,762
| -52% | -$8.67M |
|
11
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$311M
| $4.59M | 0.41% |
+250,000
| New | +$4.38M |
|
12
Crown Castle
CCI
$32.1B
| $3.03M | 0.27% |
17,500
| – | – |
|
|
NVO
13
Novo Nordisk
NVO
$207B
| $2.44M | 0.22% |
+50,800
| New | +$2.46M |
|
14
Penumbra
PEN
$12.8B
| $2.24M | 0.2% |
+8,400
| New | +$2.26M |
|
15
Enterprise Products Partners
EPD
$82.1B
| $2.16M | 0.19% |
+100,000
| New | +$2.27M |
|
16
Intellia Therapeutics
NTLA
$1.8B
| $2.01M | 0.18% |
+15,000
| New | +$2.27M |
|
17
NXP Semiconductors
NXPI
$56.9B
| $1.96M | 0.17% |
10,000
| – | – |
|
18
CRISPR Therapeutics
CRSP
$5.75B
| $1.68M | 0.15% |
+15,000
| New | +$1.88M |
|
|
XIFR
19
XPLR Infrastructure LP
XIFR
$1.05B
| $1.51M | 0.13% |
20,000
| – | – |
|
|
ARCH
20
DELISTED
Arch Resources, Inc.
ARCH
| $1.39M | 0.12% |
+15,000
| New | +$1.05M |
|
21
Teck Resources
TECK
$33.9B
| $1.25M | 0.11% |
+50,000
| New | +$1.15M |
|
22
iShares Biotechnology ETF
IBB
$10.7B
| $1.21M | 0.11% |
7,500
| – | – |
|
23
Chevron
CVX
$403B
| $1.01M | 0.09% |
10,000
| – | – |
|
24
Diamondback Energy
FANG
$59B
| $947K | 0.08% |
10,000
-20,000
| -67% | -$1.61M |
|
25
Regeneron Pharmaceuticals
REGN
$85.9B
| $605K | 0.05% |
1,000
| – | – |
|
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William Harnisch's Q3 2021 Portfolio in Review
As of Q3 2021, William Harnisch held 65 positions worth $1.13B, up 13% from $999M the previous quarter. Its ten largest holdings account for 97% of the portfolio.
William Harnisch's Q3 2021 filing shows 14 new, 5 increased, 4 reduced and 17 closed positions. Its largest new stake was Williams Companies: 400,000 shares worth $10.4M. The largest sale was Cleveland-Cliffs, an estimated $71.9M.
By sector, the portfolio is most concentrated in Industrials at 89% of assets, up from 81% a quarter earlier, followed by Energy and Real Estate.
- William Harnisch's largest Q3 2021 buy was Williams Companies: 400,000 shares worth $10.4M.
- William Harnisch added most to MasTec in Q3 2021, an estimated $55.3M increase.
- William Harnisch's biggest Q3 2021 reduction was Quanta Services, cutting an estimated $10.4M.
- William Harnisch fully exited Cleveland-Cliffs in Q3 2021, selling an estimated $71.9M.
- William Harnisch's ten largest holdings make up 97% of its $1.13B portfolio in Q3 2021.
- William Harnisch opened 14 new positions and closed 17 in Q3 2021.
- William Harnisch's portfolio value rose 13% quarter-over-quarter to $1.13B.
Based on Peconic Partners's 13F filing for Q3 2021, filed 15 Nov 2021.