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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
KEUA
7576
DELISTED
KraneShares European Carbon Allowance Strategy ETF
KEUA
| $8K | ﹤0.01% |
261
-566
| -68% | -$18.6K |
|
7577
loanDepot
LDI
$542M
| $8K | ﹤0.01% |
+4,198
| New | +$7.72K |
|
7578
CALL
AEye
LIDR
$50M
| $8K | ﹤0.01% |
1,620
-353
| -18% | -$2.19K |
|
7579
PUT
Methanex
MEOH
$4.17B
| $8K | ﹤0.01% |
200
-1,200
| -86% | -$51.8K |
|
7580
PUT
Maximus
MMS
$3.23B
| $8K | ﹤0.01% |
100
-100
| -50% | -$8.22K |
|
|
MRCC
7581
CALL
DELISTED
Monroe Capital Corp
MRCC
| $8K | ﹤0.01% |
1,000
-2,300
| -70% | -$17.7K |
|
7582
PUT
Middlesex Water
MSEX
$1.05B
| $8K | ﹤0.01% |
+100
| New | +$7.83K |
|
|
BINI
7583
DELISTED
Bollinger Innovations
BINI
| – | – |
0
| – | – |
|
7584
PUT
Quanex
NX
$854M
| $8K | ﹤0.01% |
+300
| New | +$6.67K |
|
7585
OFG Bancorp
OFG
$2.22B
| $8K | ﹤0.01% |
+318
| New | +$7.98K |
|
7586
CALL
Oil States International
OIS
$513M
| $8K | ﹤0.01% |
1,200
-17,800
| -94% | -$130K |
|
7587
PUT
Open Text
OTEX
$5.77B
| $8K | ﹤0.01% |
200
-500
| -71% | -$20.1K |
|
|
OTRK
7588
DELISTED
Ontrak
OTRK
| $8K | ﹤0.01% |
212
+22
| +12% | +$950 |
|
|
OTRK
7589
PUT
DELISTED
Ontrak
OTRK
| $8K | ﹤0.01% |
204
+4
| +2% | +$173 |
|
7590
PUT
PAVmed
PAVM
$35.7M
| $8K | ﹤0.01% |
46
+34
| +283% | +$6.8K |
|
|
PKST
7591
CALL
DELISTED
Peakstone Realty Trust
PKST
| $8K | ﹤0.01% |
+300
| New | +$7.79K |
|
7592
PUT
Pilgrim's Pride
PPC
$7.02B
| $8K | ﹤0.01% |
400
-7,400
| -95% | -$167K |
|
7593
Perimeter Solutions
PRM
$5.47B
| $8K | ﹤0.01% |
1,386
+1,183
| +583% | +$7.92K |
|
7594
CALL
Pearson
PSO
$10.1B
| $8K | ﹤0.01% |
+800
| New | +$8.25K |
|
7595
Revolution Medicines
RVMD
$39.8B
| $8K | ﹤0.01% |
328
-3
| -0.9% | -$74 |
|
|
RYZ
7596
PUT
Ryerson Holding Corp
RYZ
$1.58B
| $8K | ﹤0.01% |
200
-5,100
| -96% | -$189K |
|
7597
Comscore
SCOR
$106M
| $8K | ﹤0.01% |
541
+350
| +183% | +$6.69K |
|
7598
PUT
Seadrill
SDRL
$2.71B
| $8K | ﹤0.01% |
200
+100
| +100% | +$3.71K |
|
|
OLOX
7599
CALL
Olenox Industries
OLOX
$7.03M
| $8K | ﹤0.01% |
1
-2
| -67% | -$10.5K |
|
7600
PUT
SGHC Ltd
SGHC
$7.48B
| $8K | ﹤0.01% |
2,900
-17,500
| -86% | -$61.9K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.