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 |
Uber
UBER
|
+$42.8M |
| 2 |
Comcast
CMCSA
|
+$37.4M |
| 3 |
Vistra
VST
|
+$30.5M |
| 4 |
Caesars Entertainment
CZR
|
+$20M |
| 5 |
Shoals Technologies Group
SHLS
|
+$18.8M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Quanta Services
PWR
|
+$96.5M |
| 2 |
iShares MSCI Emerging Markets ETF
EEM
|
+$27.5M |
| 3 |
IBM
IBM
|
+$8.84M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Industrials | 92.63% |
| 2 | Technology | 2.87% |
| 3 | Communication Services | 1.37% |
| 4 | Utilities | 1.25% |
| 5 | Energy | 0.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
1
Quanta Services
PWR
$96.1B
| $1.64B | 66.78% |
5,198,565
-300,000
| -5% | -$96.5M |
|
2
Dycom Industries
DY
$11.8B
| $636M | 25.85% |
3,653,492
+35,000
| +1% | +$6.48M |
|
|
3
Uber
UBER
$161B
| $36.2M | 1.47% |
+600,000
| New | +$42.8M |
|
|
4
Comcast
CMCSA
$95.3B
| $33.8M | 1.37% |
+900,000
| New | +$37.4M |
|
|
5
Vistra
VST
$45.7B
| $30.3M | 1.23% |
+220,000
| New | +$30.5M |
|
|
6
Shoals Technologies Group
SHLS
$1.19B
| $20.5M | 0.83% |
+3,700,000
| New | +$18.8M |
|
7
EQT Corp
EQT
$33.6B
| $18.4M | 0.75% |
+400,000
| New | +$16.5M |
|
|
8
Caesars Entertainment
CZR
$6.06B
| $16.9M | 0.69% |
+504,844
| New | +$20M |
|
9
Nextpower Inc
NXT
$13.1B
| $13.9M | 0.56% |
+380,000
| New | +$13.9M |
|
10
Newell Brands
NWL
$2.59B
| $9.96M | 0.4% |
+1,000,000
| New | +$9.07M |
|
11
Amazon
AMZN
$2.79T
| $873K | 0.04% |
3,980
| – | – |
|
12
NextEra Energy
NEE
$174B
| $465K | 0.02% |
6,485
| – | – |
|
|
13
iShares MSCI Emerging Markets ETF
EEM
$30.7B
| – | – |
-600,000
| Closed | -$27.5M |
|
|
14
IBM
IBM
$222B
| – | – |
-40,000
| Closed | -$8.84M |
|
Similar funds
William Harnisch's Q4 2024 Portfolio in Review
As of Q4 2024, William Harnisch held 14 positions worth $2.46B, up 2.9% from $2.39B the previous quarter. Its ten largest holdings account for 100% of the portfolio.
William Harnisch's Q4 2024 filing shows 8 new, 1 increased, 1 reduced and 2 closed positions. Its largest new stake was Uber: 600,000 shares worth $36.2M. The largest sale was Quanta Services, an estimated $96.5M.
By sector, the portfolio is most concentrated in Industrials at 93% of assets, down from 98% a quarter earlier, followed by Technology and Communication Services.
- William Harnisch's largest Q4 2024 buy was Uber: 600,000 shares worth $36.2M.
- William Harnisch added most to Dycom Industries in Q4 2024, an estimated $6.48M increase.
- William Harnisch's biggest Q4 2024 reduction was Quanta Services, cutting an estimated $96.5M.
- William Harnisch fully exited iShares MSCI Emerging Markets ETF in Q4 2024, selling an estimated $27.5M.
- William Harnisch's ten largest holdings make up 100% of its $2.46B portfolio in Q4 2024.
- William Harnisch opened 8 new positions and closed 2 in Q4 2024.
- William Harnisch's portfolio value rose 2.9% quarter-over-quarter to $2.46B.
Based on Peconic Partners's 13F filing for Q4 2024, filed 14 Feb 2025.