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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1451
PUT
Noodles & Co
NDLS
$90.5M
| $1.26M | ﹤0.01% |
225
+223
| +11,150% | +$16.6K |
|
1452
CALL
TAL Education Group
TAL
$5.71B
| $1.25M | ﹤0.01% |
469
+101
| +27% | +$2.68K |
|
|
SAFM
1453
PUT
DELISTED
Sanderson Farms Inc
SAFM
| $1.25M | ﹤0.01% |
126
+90
| +250% | +$9.2K |
|
|
WCG
1454
PUT
DELISTED
Wellcare Health Plans, Inc.
WCG
| $1.25M | ﹤0.01% |
53
+33
| +165% | +$8.84K |
|
1455
Illumina
ILMN
$29.4B
| $1.25M | ﹤0.01% |
4,279
-10,942
| -72% | -$3.39M |
|
|
USG
1456
DELISTED
Usg
USG
| $1.25M | ﹤0.01% |
29,243
+23,959
| +453% | +$1.03M |
|
1457
State Street SPDR S&P Bank ETF
KBE
$1.64B
| $1.25M | ﹤0.01% |
33,370
+30,835
| +1,216% | +$1.31M |
|
1458
CALL
Okta
OKTA
$24.1B
| $1.24M | ﹤0.01% |
195
+92
| +89% | +$5.45K |
|
|
DISCK
1459
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $1.24M | ﹤0.01% |
513
-516
| -50% | -$14.4K |
|
1460
PUT
United Therapeutics
UTHR
$26.3B
| $1.24M | ﹤0.01% |
114
-247
| -68% | -$28.6K |
|
|
CBPO
1461
CALL
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $1.24M | ﹤0.01% |
163
+4
| +3% | +$294 |
|
|
WUBA
1462
PUT
DELISTED
58.com Inc
WUBA
| $1.24M | ﹤0.01% |
228
-92
| -29% | -$5.61K |
|
1463
PUT
Ford
F
$57.3B
| $1.23M | ﹤0.01% |
1,610
+287
| +22% | +$2.56K |
|
1464
CALL
Jabil
JBL
$32.8B
| $1.23M | ﹤0.01% |
496
+340
| +218% | +$8.3K |
|
|
COUP
1465
DELISTED
Coupa Software Incorporated
COUP
| $1.23M | ﹤0.01% |
+19,554
| New | +$1.24M |
|
1466
CALL
Columbia Sportswear
COLM
$3.19B
| $1.23M | ﹤0.01% |
146
-1
| -0.7% | -$89 |
|
1467
CALL
PPG Industries
PPG
$25.9B
| $1.23M | ﹤0.01% |
120
-16
| -12% | -$1.66K |
|
1468
Valmont Industries
VMI
$9.44B
| $1.22M | ﹤0.01% |
+11,039
| New | +$1.38M |
|
1469
PUT
Eaton
ETN
$157B
| $1.22M | ﹤0.01% |
178
+95
| +114% | +$7.11K |
|
|
FDC
1470
DELISTED
First Data Corporation
FDC
| $1.22M | ﹤0.01% |
72,244
-11,521
| -14% | -$225K |
|
1471
PUT
Ambarella
AMBA
$2.99B
| $1.22M | ﹤0.01% |
349
-225
| -39% | -$7.97K |
|
1472
PUT
H&R Block
HRB
$5.18B
| $1.22M | ﹤0.01% |
481
+64
| +15% | +$1.71K |
|
1473
PUT
Qorvo
QRVO
$7.63B
| $1.22M | ﹤0.01% |
201
-403
| -67% | -$27.1K |
|
|
HBI
1474
PUT
DELISTED
Hanesbrands
HBI
| $1.22M | ﹤0.01% |
973
+671
| +222% | +$10.4K |
|
1475
Palo Alto Networks
PANW
$264B
| $1.22M | ﹤0.01% |
38,760
+21,546
| +125% | +$672K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.