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 |
Dycom Industries
DY
|
+$9.09M |
| 2 |
Cinemark Holdings
CNK
|
+$5.02M |
| 3 |
Amazon
AMZN
|
+$4.69M |
| 4 |
Sweetgreen
SG
|
+$4.18M |
| 5 |
WCC
WESCO International
WCC
|
+$33.1K |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Uber
UBER
|
+$48.9M |
| 2 |
ETRN
Equitrans Midstream Corporation Common Stock
ETRN
|
+$38.7M |
| 3 |
MasTec
MTZ
|
+$34.8M |
| 4 |
Twilio
TWLO
|
+$6.68M |
| 5 |
Silicon Laboratories
SLAB
|
+$2.37M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Industrials | 98.9% |
| 2 | Consumer Discretionary | 0.49% |
| 3 | Communication Services | 0.32% |
| 4 | Technology | 0.3% |
| 5 | Energy | 0% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1
Quanta Services
PWR
$96.1B
| $1.03B | 60.27% |
5,528,365
| – | – |
|
|
WCC
2
WESCO International
WCC
$17B
| $352M | 20.54% |
2,450,348
+205
| +0% | +$33.1K |
|
|
3
Dycom Industries
DY
$11.8B
| $289M | 16.83% |
3,244,047
+91,093
| +3% | +$9.09M |
|
|
4
MasTec
MTZ
$21.4B
| $21.7M | 1.26% |
301,047
-348,953
| -54% | -$34.8M |
|
|
5
Cinemark Holdings
CNK
$4.24B
| $5.5M | 0.32% |
+300,000
| New | +$5.02M |
|
|
6
Uber
UBER
$161B
| $5.07M | 0.3% |
110,330
-1,070,107
| -91% | -$48.9M |
|
|
7
Amazon
AMZN
$2.79T
| $4.82M | 0.28% |
37,915
+35,000
| +1,201% | +$4.69M |
|
|
8
Sweetgreen
SG
$832M
| $3.52M | 0.21% |
+300,000
| New | +$4.18M |
|
9
Lumen
LUMN
$6.13B
| – | – |
-200,000
| Closed | -$452K |
|
10
Cloudflare
NET
$104B
| – | – |
-30,000
| Closed | -$1.96M |
|
11
Pool Corp
POOL
$6.83B
| – | – |
-6,000
| Closed | -$2.25M |
|
12
RH
RH
$2.9B
| – | – |
-3,000
| Closed | -$989K |
|
13
Shopify
SHOP
$192B
| – | – |
-30,000
| Closed | -$1.94M |
|
|
14
Silicon Laboratories
SLAB
$7.27B
| – | – |
-15,000
| Closed | -$2.37M |
|
15
Sensata Technologies
ST
$6.23B
| – | – |
-40,000
| Closed | -$1.8M |
|
|
16
Twilio
TWLO
$34.6B
| – | – |
-105,000
| Closed | -$6.68M |
|
17
Veeva Systems
VEEV
$40.3B
| – | – |
-10,000
| Closed | -$1.98M |
|
|
ETRN
18
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| – | – |
-4,051,061
| Closed | -$38.7M |
|
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William Harnisch's Q3 2023 Portfolio in Review
As of Q3 2023, William Harnisch held 18 positions worth $1.72B, down 17% from $2.07B the previous quarter. Its ten largest holdings account for 100% of the portfolio.
William Harnisch withdrew a net $120M in Q3 2023, closing 10 positions and reducing 2 holdings. Its most notable exit was Equitrans Midstream Corporation Common Stock, an estimated $38.7M position sold in full.
By sector, the portfolio is most concentrated in Industrials at 99% of assets, up from 95% a quarter earlier, followed by Consumer Discretionary and Communication Services.
Against the trend, William Harnisch opened a new position in Cinemark Holdings worth $5.5M.
- William Harnisch's largest Q3 2023 buy was Cinemark Holdings: 300,000 shares worth $5.5M.
- William Harnisch added most to Dycom Industries in Q3 2023, an estimated $9.09M increase.
- William Harnisch's biggest Q3 2023 reduction was Uber, cutting an estimated $48.9M.
- William Harnisch fully exited Equitrans Midstream Corporation Common Stock in Q3 2023, selling an estimated $38.7M.
- William Harnisch's ten largest holdings make up 100% of its $1.72B portfolio in Q3 2023.
- William Harnisch opened 2 new positions and closed 10 in Q3 2023.
- William Harnisch's portfolio value fell 17% quarter-over-quarter to $1.72B.
Based on Peconic Partners's 13F filing for Q3 2023, filed 14 Nov 2023.