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 | |
|---|---|---|---|---|---|---|
2601
CALL
Hess Midstream
HESM
$5.22B
| $997K | ﹤0.01% |
32,500
-9,900
| -23% | -$286K |
|
2602
Morgan Stanley
MS
$337B
| $997K | ﹤0.01% |
+11,678
| New | +$999K |
|
2603
CALL
Trump Media & Technology Group
DJT
$2.37B
| $996K | ﹤0.01% |
79,300
-30,200
| -28% | -$396K |
|
|
MRNS
2604
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $996K | ﹤0.01% |
91,735
-19,182
| -17% | -$164K |
|
2605
JB Hunt Transport Services
JBHT
$27.1B
| $995K | ﹤0.01% |
5,500
-5,387
| -49% | -$937K |
|
2606
CALL
Impinj
PI
$3.89B
| $995K | ﹤0.01% |
11,100
-4,700
| -30% | -$501K |
|
|
ISEE
2607
CALL
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $995K | ﹤0.01% |
171,000
+81,800
| +92% | +$2.89M |
|
2608
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$263M
| $994K | ﹤0.01% |
15,400
-8,700
| -36% | -$451K |
|
2609
PUT
Molina Healthcare
MOH
$10.3B
| $994K | ﹤0.01% |
3,300
-33,200
| -91% | -$9.54M |
|
2610
PUT
Taylor Morrison
TMHC
| $994K | ﹤0.01% |
20,400
-15,700
| -43% | -$676K |
|
2611
CALL
Blackstone Secured Lending
BXSL
$5.41B
| $990K | ﹤0.01% |
36,200
-46,900
| -56% | -$1.21M |
|
2612
CALL
Trimble
TRMB
$12.3B
| $989K | ﹤0.01% |
18,700
+13,100
| +234% | +$641K |
|
2613
PUT
Agios Pharmaceuticals
AGIO
$2.16B
| $985K | ﹤0.01% |
34,800
+13,100
| +60% | +$326K |
|
2614
PUT
Cytokinetics
CYTK
$11B
| $985K | ﹤0.01% |
30,200
+29,700
| +5,940% | +$1.1M |
|
2615
GFL Environmental
GFL
$14.3B
| $985K | ﹤0.01% |
+25,398
| New | +$923K |
|
2616
NCR Voyix
VYX
$1.06B
| $985K | ﹤0.01% |
63,761
-7,780
| -11% | -$112K |
|
|
VTNR
2617
PUT
DELISTED
Vertex Energy, Inc
VTNR
| $982K | ﹤0.01% |
157,200
+78,600
| +100% | +$554K |
|
2618
PUT
Northern Oil and Gas
NOG
$2.3B
| $981K | ﹤0.01% |
28,600
+13,300
| +87% | +$431K |
|
2619
PUT
Synaptics
SYNA
$4.41B
| $981K | ﹤0.01% |
11,500
+4,900
| +74% | +$425K |
|
2620
PUT
Terex
TEX
$7.98B
| $981K | ﹤0.01% |
16,400
+400
| +3% | +$19.8K |
|
|
KDNY
2621
DELISTED
Chinook Therapeutics, Inc. Common Stock
KDNY
| $981K | ﹤0.01% |
+25,538
| New | +$656K |
|
2622
PUT
Cirrus Logic
CRUS
$6.74B
| $980K | ﹤0.01% |
12,100
+9,000
| +290% | +$745K |
|
2623
FTI Consulting
FCN
$4.82B
| $979K | ﹤0.01% |
5,148
+5,033
| +4,377% | +$951K |
|
2624
CALL
Atmos Energy
ATO
$29.9B
| $977K | ﹤0.01% |
8,400
-9,600
| -53% | -$1.11M |
|
2625
CALL
Xcel Energy
XEL
$51B
| $976K | ﹤0.01% |
15,700
+5,100
| +48% | +$340K |
|
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.