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
|
+$19.2M |
| 2 |
Uber
UBER
|
+$15.6M |
| 3 |
WCC
WESCO International
WCC
|
+$12.6M |
| 4 |
Caesars Entertainment
CZR
|
+$8.04M |
| 5 |
PENN Entertainment
PENN
|
+$6.16M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
ETRN
Equitrans Midstream Corporation Common Stock
ETRN
|
+$21.4M |
| 2 |
Warner Bros
WBD
|
+$19.3M |
| 3 |
Bumble
BMBL
|
+$11M |
| 4 |
Global Payments
GPN
|
+$10.8M |
| 5 |
Global X Uranium ETF
URA
|
+$7.93M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Industrials | 88.65% |
| 2 | Consumer Discretionary | 5.27% |
| 3 | Technology | 3.6% |
| 4 | Real Estate | 1.16% |
| 5 | Energy | 0.67% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
Quanta Services
PWR
$96.1B
| $807M | 52.07% |
5,562,947
+31,744
| +0.6% | +$4.51M |
|
|
WCC
2
WESCO International
WCC
$17B
| $311M | 20.08% |
2,485,143
+100,000
| +4% | +$12.6M |
|
3
Dycom Industries
DY
$11.8B
| $236M | 15.22% |
2,519,892
+37,905
| +2% | +$3.82M |
|
4
General Motors
GM
$77.2B
| $68.5M | 4.42% |
2,035,858
-94,142
| -4% | -$3.48M |
|
|
5
Uber
UBER
$161B
| $41.3M | 2.67% |
1,671,700
+571,700
| +52% | +$15.6M |
|
|
6
MasTec
MTZ
$21.4B
| $20M | 1.29% |
+234,300
| New | +$19.2M |
|
7
SBA Communications
SBAC
$19.4B
| $17.5M | 1.13% |
62,359
-10,250
| -14% | -$2.85M |
|
|
8
Caesars Entertainment
CZR
$6.06B
| $7.51M | 0.48% |
+180,447
| New | +$8.04M |
|
9
Diamondback Energy
FANG
$59B
| $6.84M | 0.44% |
50,000
| – | – |
|
|
10
PENN Entertainment
PENN
$2.5B
| $5.64M | 0.36% |
+190,000
| New | +$6.16M |
|
11
Enphase Energy
ENPH
$5.1B
| $5.3M | 0.34% |
+20,000
| New | +$5.82M |
|
12
Shoals Technologies Group
SHLS
$1.19B
| $4.93M | 0.32% |
+200,000
| New | +$4.83M |
|
13
AbbVie
ABBV
$468B
| $2.42M | 0.16% |
15,000
| – | – |
|
14
Array Technologies
ARRY
$722M
| $2.32M | 0.15% |
+120,000
| New | +$2.28M |
|
15
Teck Resources
TECK
$33.9B
| $2.27M | 0.15% |
+60,000
| New | +$2.08M |
|
|
ETRN
16
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $2.01M | 0.13% |
300,000
-2,753,680
| -90% | -$21.4M |
|
17
NXP Semiconductors
NXPI
$56.9B
| $1.58M | 0.1% |
10,000
| – | – |
|
18
iShares Biotechnology ETF
IBB
$10.7B
| $985K | 0.06% |
7,500
| – | – |
|
|
DEN
19
DELISTED
Denbury Inc.
DEN
| $870K | 0.06% |
+10,000
| New | +$908K |
|
20
Tilray
TLRY
$666M
| $807K | 0.05% |
+30,000
| New | +$1.05M |
|
21
AT&T
T
$173B
| $736K | 0.05% |
40,000
| – | – |
|
22
Alpha Metallurgical Resources
AMR
$2.66B
| $732K | 0.05% |
5,000
| – | – |
|
|
ARCH
23
DELISTED
Arch Resources, Inc.
ARCH
| $714K | 0.05% |
5,000
-5,000
| -50% | -$731K |
|
|
XIFR
24
XPLR Infrastructure LP
XIFR
$1.05B
| $701K | 0.05% |
10,000
| – | – |
|
25
Crown Castle
CCI
$32.1B
| $560K | 0.04% |
4,126
| – | – |
|
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William Harnisch's Q4 2022 Portfolio in Review
As of Q4 2022, William Harnisch held 43 positions worth $1.55B, up 7.1% from $1.45B the previous quarter. Its ten largest holdings account for 98% of the portfolio.
William Harnisch's Q4 2022 filing shows 9 new, 4 increased, 6 reduced and 10 closed positions. Its largest new stake was MasTec: 234,300 shares worth $20M. The largest sale was Equitrans Midstream Corporation Common Stock, an estimated $21.4M.
By sector, the portfolio is most concentrated in Industrials at 89% of assets, up from 85% a quarter earlier, followed by Consumer Discretionary and Technology.
- William Harnisch's largest Q4 2022 buy was MasTec: 234,300 shares worth $20M.
- William Harnisch added most to Uber in Q4 2022, an estimated $15.6M increase.
- William Harnisch's biggest Q4 2022 reduction was Equitrans Midstream Corporation Common Stock, cutting an estimated $21.4M.
- William Harnisch fully exited Bumble in Q4 2022, selling an estimated $11M.
- William Harnisch's ten largest holdings make up 98% of its $1.55B portfolio in Q4 2022.
- William Harnisch opened 9 new positions and closed 10 in Q4 2022.
- William Harnisch's portfolio value rose 7.1% quarter-over-quarter to $1.55B.
Based on Peconic Partners's 13F filing for Q4 2022, filed 14 Feb 2023.