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 | |
|---|---|---|---|---|---|---|
3576
CALL
Dragonfly Energy
DFLI
$16.8M
| $383K | ﹤0.01% |
2,880
+2,664
| +1,233% | +$794K |
|
3577
CALL
Innoviz Technologies
INVZ
$99.5M
| $383K | ﹤0.01% |
135,100
+2,400
| +2% | +$6.62K |
|
3578
PUT
CarGurus
CARG
$3.28B
| $382K | ﹤0.01% |
16,900
+14,400
| +576% | +$273K |
|
3579
CoreCivic
CXW
$3.03B
| $382K | ﹤0.01% |
+40,621
| New | +$369K |
|
3580
PUT
IQVIA
IQV
$40.5B
| $382K | ﹤0.01% |
1,700
-20,700
| -92% | -$4.16M |
|
3581
CALL
Teekay Tankers
TNK
$2.66B
| $382K | ﹤0.01% |
10,000
-1,000
| -9% | -$38.9K |
|
3582
CALL
Ambev
ABEV
$48.4B
| $381K | ﹤0.01% |
120,000
-106,200
| -47% | -$312K |
|
|
GOL
3583
PUT
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $381K | ﹤0.01% |
69,800
-225,000
| -76% | -$761K |
|
3584
Groupon
GRPN
$1.07B
| $380K | ﹤0.01% |
+64,335
| New | +$285K |
|
|
KNDI
3585
CALL
Kandi Technologies Group
KNDI
$63.5M
| $380K | ﹤0.01% |
96,000
+44,800
| +88% | +$152K |
|
3586
Insulet
PODD
$11.6B
| $380K | ﹤0.01% |
+1,318
| New | +$400K |
|
3587
Rush Street Interactive
RSI
$3.16B
| $380K | ﹤0.01% |
121,975
+112,373
| +1,170% | +$347K |
|
3588
Vipshop
VIPS
$7.13B
| $380K | ﹤0.01% |
+23,034
| New | +$361K |
|
3589
CALL
Xeris Biopharma Holdings
XERS
$1.42B
| $380K | ﹤0.01% |
145,300
+53,300
| +58% | +$136K |
|
3590
CALL
BWX Technologies
BWXT
$15.5B
| $379K | ﹤0.01% |
5,300
-2,900
| -35% | -$189K |
|
3591
CAVA Group
CAVA
$7.57B
| $379K | ﹤0.01% |
+9,256
| New | +$381K |
|
3592
CALL
Performance Food Group
PFGC
$18.1B
| $379K | ﹤0.01% |
6,300
+5,300
| +530% | +$312K |
|
3593
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.7M
| $378K | ﹤0.01% |
3,100
+2,200
| +244% | +$265K |
|
|
SWN
3594
PUT
DELISTED
Southwestern Energy Company
SWN
| $378K | ﹤0.01% |
62,900
-23,200
| -27% | -$120K |
|
3595
Alpha and Omega Semiconductor
AOSL
$863M
| $377K | ﹤0.01% |
+11,499
| New | +$309K |
|
3596
CALL
Buckle
BKE
$2.35B
| $377K | ﹤0.01% |
10,900
-7,500
| -41% | -$252K |
|
3597
PUT
Coeur Mining
CDE
$15.4B
| $377K | ﹤0.01% |
132,800
-10,800
| -8% | -$36.7K |
|
3598
PUT
Kimbell Royalty Partners
KRP
$1.43B
| $376K | ﹤0.01% |
25,600
+12,100
| +90% | +$187K |
|
3599
CALL
OneWater Marine
ONEW
$217M
| $376K | ﹤0.01% |
10,400
-27,200
| -72% | -$803K |
|
3600
PUT
SFL Corp
SFL
$1.61B
| $376K | ﹤0.01% |
40,400
+14,700
| +57% | +$133K |
|
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.