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 | |
|---|---|---|---|---|---|---|
4826
PUT
Safe Bulkers
SB
$772M
| $124K | ﹤0.01% |
38,100
-22,700
| -37% | -$79.7K |
|
|
ZYXI
4827
PUT
DELISTED
Zynex
ZYXI
| $124K | ﹤0.01% |
13,000
+12,100
| +1,344% | +$126K |
|
|
IRD
4828
CALL
Opus Genetics
IRD
$287M
| $124K | ﹤0.01% |
28,800
+22,800
| +380% | +$108K |
|
|
AIRC
4829
DELISTED
Apartment Income REIT Corp.
AIRC
| $124K | ﹤0.01% |
3,458
-8,415
| -71% | -$300K |
|
|
SPPI
4830
CALL
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $124K | ﹤0.01% |
129,500
+11,400
| +10% | +$11.3K |
|
4831
PUT
Achieve Life Sciences
ACHV
$634M
| $123K | ﹤0.01% |
23,800
+17,400
| +272% | +$122K |
|
4832
Invesco CurrencyShares Euro Currency Trust
FXE
$344M
| $123K | ﹤0.01% |
1,230
+230
| +23% | +$23.1K |
|
4833
PUT
LivePerson
LPSN
$22M
| $123K | ﹤0.01% |
1,820
+673
| +59% | +$43.7K |
|
|
MAPS
4834
CALL
DELISTED
WM TECHNOLOGY INC A
MAPS
| $123K | ﹤0.01% |
147,400
-45,100
| -23% | -$36.9K |
|
|
SOL
4835
PUT
DELISTED
Emeren Group
SOL
| $123K | ﹤0.01% |
32,600
+12,400
| +61% | +$48.1K |
|
4836
PUT
Sphere Entertainment
SPHR
$5.02B
| $123K | ﹤0.01% |
5,300
+2,500
| +89% | +$82.9K |
|
|
FFAI
4837
CALL
Faraday Future Intelligent Electric
FFAI
$11.8M
| – | – |
0
| – | – |
|
|
VRAY
4838
PUT
DELISTED
ViewRay, Inc.
VRAY
| $123K | ﹤0.01% |
349,300
-399,700
| -53% | -$414K |
|
4839
PUT
Advanced Energy
AEIS
$10.1B
| $122K | ﹤0.01% |
+1,100
| New | +$105K |
|
4840
PUT
Coca-Cola Europacific Partners
CCEP
$49.1B
| $122K | ﹤0.01% |
1,900
+1,800
| +1,800% | +$114K |
|
4841
Cooper-Standard Automotive
CPS
$517M
| $122K | ﹤0.01% |
8,590
-3,839
| -31% | -$46.8K |
|
4842
Pitney Bowes
PBI
$2.39B
| $122K | ﹤0.01% |
+34,615
| New | +$120K |
|
4843
Riot Platforms
RIOT
$6.9B
| $122K | ﹤0.01% |
10,400
| – | – |
|
4844
CALL
Kartoon Studios
TOON
$34M
| $122K | ﹤0.01% |
63,900
+19,700
| +45% | +$52.2K |
|
4845
CALL
VOC Energy
VOC
$56.4M
| $122K | ﹤0.01% |
15,500
+7,600
| +96% | +$62.2K |
|
|
BLRX
4846
CALL
BioLineRX
BLRX
$12M
| $121K | ﹤0.01% |
+1,903
| New | +$105K |
|
4847
CALL
Douglas Emmett
DEI
$2.05B
| $121K | ﹤0.01% |
9,700
+8,800
| +978% | +$106K |
|
4848
PUT
Frontdoor
FTDR
$5.27B
| $121K | ﹤0.01% |
3,800
+3,700
| +3,700% | +$110K |
|
4849
CALL
Upwork
UPWK
$1.18B
| $121K | ﹤0.01% |
13,000
+10,800
| +491% | +$97.8K |
|
4850
PUT
Allegion
ALLE
$13.5B
| $120K | ﹤0.01% |
1,000
+700
| +233% | +$76.4K |
|
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.