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 | |
|---|---|---|---|---|---|---|
1851
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $2.33M | ﹤0.01% |
53,100
-18,000
| -25% | -$698K |
|
1852
CALL
Lantheus
LNTH
$6.82B
| $2.32M | ﹤0.01% |
27,700
-4,800
| -15% | -$431K |
|
1853
PUT
Dave & Buster's
PLAY
$343M
| $2.32M | ﹤0.01% |
52,100
+13,200
| +34% | +$482K |
|
|
SRG
1854
CALL
Seritage Growth Properties
SRG
$130M
| $2.32M | ﹤0.01% |
259,800
-156,900
| -38% | -$1.25M |
|
1855
PUT
KE Holdings
BEKE
$16.8B
| $2.32M | ﹤0.01% |
156,000
-131,800
| -46% | -$2.15M |
|
1856
CALL
iShares Convertible Bond ETF
ICVT
$7.23B
| $2.31M | ﹤0.01% |
76,600
-215,900
| -74% | -$15.7M |
|
1857
CALL
Cracker Barrel
CBRL
$1.2B
| $2.31M | ﹤0.01% |
24,800
+19,800
| +396% | +$2.03M |
|
1858
CALL
Alliance Resource Partners
ARLP
$3.18B
| $2.31M | ﹤0.01% |
124,900
+33,800
| +37% | +$648K |
|
1859
PUT
Travelers Companies
TRV
$80.8B
| $2.31M | ﹤0.01% |
13,300
-19,700
| -60% | -$3.47M |
|
1860
CALL
Camping World
CWH
$363M
| $2.31M | ﹤0.01% |
76,700
+14,600
| +24% | +$368K |
|
1861
PUT
Ball Corp
BALL
$17B
| $2.31M | ﹤0.01% |
39,600
+18,900
| +91% | +$1.02M |
|
1862
CALL
Hyatt Hotels
H
$17.6B
| $2.3M | ﹤0.01% |
20,100
-13,300
| -40% | -$1.5M |
|
1863
CALL
FTAI Aviation
FTAI
$22.2B
| $2.3M | ﹤0.01% |
72,600
+15,700
| +28% | +$445K |
|
|
HTGCR
1864
PUT
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $2.29M | ﹤0.01% |
155,100
-232,200
| -60% | -$3.44M |
|
|
BGFV
1865
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $2.29M | ﹤0.01% |
250,000
+174,000
| +229% | +$1.39M |
|
1866
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $2.29M | ﹤0.01% |
14,100
-33,000
| -70% | -$5.17M |
|
1867
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $2.29M | ﹤0.01% |
36,500
-14,100
| -28% | -$945K |
|
1868
PUT
Credit Acceptance
CACC
$6B
| $2.29M | ﹤0.01% |
4,500
-4,700
| -51% | -$2.2M |
|
1869
CALL
Clean Harbors
CLH
$16.1B
| $2.29M | ﹤0.01% |
13,900
+13,200
| +1,886% | +$1.93M |
|
1870
CALL
Carlisle Companies
CSL
$13.6B
| $2.28M | ﹤0.01% |
8,900
+8,700
| +4,350% | +$1.93M |
|
1871
BJs Wholesale Club
BJ
$11.9B
| $2.28M | ﹤0.01% |
36,218
+7,966
| +28% | +$551K |
|
|
CBL
1872
CALL
DELISTED
CBL& Associates Properties, Inc.
CBL
| $2.27M | ﹤0.01% |
103,200
+16,300
| +19% | +$359K |
|
1873
CALL
Vermilion Energy
VET
$1.73B
| $2.27M | ﹤0.01% |
182,500
+21,500
| +13% | +$265K |
|
1874
PUT
Signet Jewelers
SIG
$3.55B
| $2.27M | ﹤0.01% |
34,800
-23,300
| -40% | -$1.61M |
|
1875
Vodafone
VOD
$34.9B
| $2.27M | ﹤0.01% |
240,408
-247,802
| -51% | -$2.6M |
|
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.