Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
ENLC
6751
PUT
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $24K | ﹤0.01% |
1,800
-1,800
| -50% | -$24K |
|
6752
CALL
Addus HomeCare
ADUS
$2.22B
| $23K | ﹤0.01% |
200
-3,000
| -94% | -$321K |
|
|
BRDG
6753
CALL
DELISTED
Bridge Investment Group
BRDG
| $23K | ﹤0.01% |
3,100
+2,500
| +417% | +$17.9K |
|
6754
Cadiz
CDZI
$251M
| $23K | ﹤0.01% |
7,681
+328
| +4% | +$891 |
|
6755
CALL
Cognyte Software
CGNT
$655M
| $23K | ﹤0.01% |
3,100
-13,800
| -82% | -$103K |
|
6756
CALL
CNA Financial
CNA
$14.9B
| $23K | ﹤0.01% |
500
-400
| -44% | -$17.7K |
|
6757
PUT
Columbia Sportswear
COLM
$3.25B
| $23K | ﹤0.01% |
300
-1,100
| -79% | -$88.9K |
|
6758
Distribution Solutions Group
DSGR
$1.6B
| $23K | ﹤0.01% |
769
+610
| +384% | +$20.3K |
|
6759
CALL
4D Molecular Therapeutics
FDMT
$502M
| $23K | ﹤0.01% |
1,100
-7,900
| -88% | -$198K |
|
6760
CALL
First Financial Bankshares
FFIN
$5.05B
| $23K | ﹤0.01% |
800
| – | – |
|
6761
PUT
First Industrial Realty Trust
FR
$8.66B
| $23K | ﹤0.01% |
+500
| New | +$23.9K |
|
6762
Global Partners
GLP
$1.65B
| $23K | ﹤0.01% |
506
-296
| -37% | -$13.7K |
|
6763
PUT
Harmonic Inc
HLIT
$1.15B
| $23K | ﹤0.01% |
2,000
-800
| -29% | -$9.03K |
|
6764
CALL
ICU Medical
ICUI
$4.16B
| $23K | ﹤0.01% |
+200
| New | +$21K |
|
6765
CALL
Inter&Co
INTR
$2.39B
| $23K | ﹤0.01% |
3,800
-900
| -19% | -$5.18K |
|
|
KALV
6766
CALL
DELISTED
KalVista Pharmaceuticals
KALV
| $23K | ﹤0.01% |
2,000
-5,500
| -73% | -$64.2K |
|
|
LGO
6767
Largo
LGO
$59.1M
| $23K | ﹤0.01% |
12,928
+7,462
| +137% | +$13K |
|
6768
LivePerson
LPSN
$22M
| $23K | ﹤0.01% |
2,674
-83
| -3% | -$797 |
|
6769
ManpowerGroup
MAN
$2.6B
| $23K | ﹤0.01% |
337
-417
| -55% | -$30.9K |
|
6770
PUT
Monro
MNRO
$414M
| $23K | ﹤0.01% |
1,000
-1,800
| -64% | -$48K |
|
6771
CALL
MoneyHero
MNY
$41.9M
| $23K | ﹤0.01% |
12,400
-8,400
| -40% | -$17.4K |
|
6772
PUT
NBT Bancorp
NBTB
$2.82B
| $23K | ﹤0.01% |
+600
| New | +$21.7K |
|
|
NEWP
6773
PUT
New Pacific Metals
NEWP
$809M
| $23K | ﹤0.01% |
15,400
+13,000
| +542% | +$24.7K |
|
6774
PUT
Puma Biotechnology
PBYI
$398M
| $23K | ﹤0.01% |
7,300
+5,700
| +356% | +$25K |
|
|
PTN
6775
Palatin Technologies
PTN
$14.4M
| $23K | ﹤0.01% |
241
-69
| -22% | -$6.66K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.