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 |
GE Aerospace
GE
|
+$36M |
| 2 |
Advanced Micro Devices
AMD
|
+$19.4M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$10.2M |
| 4 |
Micron Technology
MU
|
+$6.31M |
| 5 |
Alibaba
BABA
|
+$6.19M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$25.9M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.3M |
| 3 |
Amazon
AMZN
|
+$9.53M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.03M |
| 5 |
State Street Technology Select Sector SPDR ETF
XLK
|
+$7.73M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.25% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TPGY
1276
PUT
DELISTED
TPG Pace Beneficial Finance Corp.
TPGY
| $4.61M | ﹤0.01% |
354,900
+5,600
| +2% | +$63.9K |
|
1277
CALL
New Oriental
EDU
$7.82B
| $4.61M | ﹤0.01% |
59,010
+2,460
| +4% | +$78.1K |
|
1278
PUT
Campbell Soup
CPB
$6.52B
| $4.6M | ﹤0.01% |
100,700
+900
| +0.9% | +$39.1K |
|
|
NUAN
1279
PUT
DELISTED
Nuance Communications, Inc.
NUAN
| $4.6M | ﹤0.01% |
84,400
| – | – |
|
1280
Tyson Foods
TSN
$20.1B
| $4.6M | ﹤0.01% |
62,339
+2,195
| +4% | +$166K |
|
1281
CALL
Church & Dwight Co
CHD
$23B
| $4.6M | ﹤0.01% |
54,200
| – | – |
|
1282
Ford
F
$56.9B
| $4.59M | ﹤0.01% |
307,763
-45,375
| -13% | -$617K |
|
1283
PUT
CoStar Group
CSGP
$11.4B
| $4.59M | ﹤0.01% |
55,100
| – | – |
|
1284
Bausch Health
BHC
$1.66B
| $4.59M | ﹤0.01% |
152,562
-1,688
| -1% | -$47.9K |
|
1285
PUT
JetBlue
JBLU
$1.95B
| $4.57M | ﹤0.01% |
267,200
+4,700
| +2% | +$72.1K |
|
1286
State Street SPDR S&P Biotech ETF
XBI
$10.1B
| $4.57M | ﹤0.01% |
33,018
+435
| +1% | +$56K |
|
1287
CALL
Ciena
CIEN
$54.8B
| $4.56M | ﹤0.01% |
78,900
+6,500
| +9% | +$361K |
|
1288
VanEck Junior Gold Miners ETF
GDXJ
$7.03B
| $4.55M | ﹤0.01% |
97,515
-5,430
| -5% | -$233K |
|
|
CERN
1289
CALL
DELISTED
Cerner Corp
CERN
| $4.54M | ﹤0.01% |
57,900
+900
| +2% | +$69.5K |
|
1290
CALL
Estee Lauder
EL
$29B
| $4.53M | ﹤0.01% |
14,300
+200
| +1% | +$65.3K |
|
|
HZON
1291
CALL
DELISTED
Horizon Acquisition Corporation II
HZON
| $4.52M | ﹤0.01% |
461,900
+7,400
| +2% | +$72.1K |
|
1292
PUT
ON Semiconductor
ON
$33.5B
| $4.51M | ﹤0.01% |
119,100
| – | – |
|
1293
PUT
FIVE9
FIVN
$1.79B
| $4.51M | ﹤0.01% |
24,400
+100
| +0.4% | +$18.2K |
|
1294
PUT
NetApp
NTAP
$32.7B
| $4.51M | ﹤0.01% |
55,000
+800
| +1% | +$67.6K |
|
1295
PUT
Service Corp International
SCI
$11.4B
| $4.5M | ﹤0.01% |
83,100
| – | – |
|
|
AGC
1296
CALL
DELISTED
Altimeter Growth Corp
AGC
| $4.5M | ﹤0.01% |
386,700
+200
| +0.1% | +$2.13K |
|
1297
PUT
Synaptics
SYNA
$4.39B
| $4.49M | ﹤0.01% |
29,200
+100
| +0.3% | +$16.8K |
|
|
CVAC
1298
PUT
DELISTED
CureVac
CVAC
| $4.46M | ﹤0.01% |
65,800
+6,600
| +11% | +$398K |
|
|
IPOD
1299
CALL
DELISTED
Social Capital Hedosophia Holdings Corp. IV
IPOD
| $4.46M | ﹤0.01% |
428,000
+6,300
| +1% | +$63.5K |
|
1300
PUT
Corsair Gaming
CRSR
$1.06B
| $4.44M | ﹤0.01% |
135,400
+7,200
| +6% | +$206K |
|
Similar funds
Simplex Trading's Q3 2021 Portfolio in Review
As of Q3 2021, Simplex Trading held 10,062 positions worth $107B, up 3.4% from $104B the previous quarter. Its ten largest holdings account for 41% of the portfolio.
Trading was light in Q3 2021: portfolio turnover was 3.5%. Simplex Trading opened 86 new positions and exited 271, leaving the 10,062-position portfolio largely intact.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.47% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q3 2021 buy was Olo Inc: 143,230 shares worth $4.91M.
- Simplex Trading added most to GE Aerospace in Q3 2021, an estimated $36M increase.
- Simplex Trading's biggest Q3 2021 reduction was NVIDIA, cutting an estimated $25.9M.
- Simplex Trading fully exited Amazon in Q3 2021, selling an estimated $9.53M.
- Simplex Trading's ten largest holdings make up 41% of its $107B portfolio in Q3 2021.
- Simplex Trading opened 86 new positions and closed 271 in Q3 2021.
- Simplex Trading's portfolio value rose 3.4% quarter-over-quarter to $107B.
Based on Simplex Trading's 13F filing for Q3 2021, filed 28 Oct 2021.