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 | |
|---|---|---|---|---|---|---|
2801
PUT
Green Dot
GDOT
$753M
| $278K | ﹤0.01% |
35
-50
| -59% | -$3.95K |
|
|
COHR
2802
DELISTED
Coherent Inc
COHR
| $278K | ﹤0.01% |
+2,636
| New | +$339K |
|
|
SIVB
2803
DELISTED
SVB Financial Group
SIVB
| $278K | ﹤0.01% |
1,464
+692
| +90% | +$169K |
|
|
CERN
2804
PUT
DELISTED
Cerner Corp
CERN
| $277K | ﹤0.01% |
53
-7
| -12% | -$406 |
|
2805
DigitalBridge
DBRG
$2.94B
| $276K | ﹤0.01% |
14,761
+10,791
| +272% | +$247K |
|
2806
PUT
Gildan
GIL
$9.25B
| $276K | ﹤0.01% |
91
+89
| +4,450% | +$2.75K |
|
|
P
2807
Everpure Inc
P
$24.8B
| $276K | ﹤0.01% |
+17,221
| New | +$339K |
|
|
ENDP
2808
DELISTED
Endo International plc
ENDP
| $276K | ﹤0.01% |
37,889
+25,386
| +203% | +$348K |
|
|
CCMP
2809
PUT
DELISTED
CMC Materials, Inc. Common Stock
CCMP
| $276K | ﹤0.01% |
29
-96
| -77% | -$9.41K |
|
2810
PUT
Axogen
AXGN
$2.1B
| $275K | ﹤0.01% |
135
-219
| -62% | -$6.85K |
|
|
NUAN
2811
CALL
DELISTED
Nuance Communications, Inc.
NUAN
| $275K | ﹤0.01% |
240
-86
| -26% | -$1.21K |
|
2812
PUT
Brookdale Senior Living
BKD
$3.62B
| $274K | ﹤0.01% |
410
+129
| +46% | +$1.08K |
|
|
DMC
2813
PUT
Del Monte Corp
DMC
$1.35B
| $274K | ﹤0.01% |
97
+58
| +149% | +$1.82K |
|
2814
iShares MSCI China ETF
MCHI
$6.04B
| $274K | ﹤0.01% |
+5,214
| New | +$286K |
|
2815
PUT
Vanguard Dividend Appreciation ETF
VIG
$111B
| $274K | ﹤0.01% |
28
+15
| +115% | +$1.56K |
|
2816
PUT
Olin
OLN
$2.64B
| $273K | ﹤0.01% |
136
-147
| -52% | -$3.13K |
|
2817
PDF Solutions
PDFS
$2.13B
| $273K | ﹤0.01% |
32,461
-24,548
| -43% | -$208K |
|
2818
Tennant Co
TNC
$1.5B
| $273K | ﹤0.01% |
5,241
+4,837
| +1,197% | +$295K |
|
2819
PUT
Willis Towers Watson
WTW
$27.9B
| $273K | ﹤0.01% |
18
-54
| -75% | -$8.08K |
|
|
GWR
2820
CALL
DELISTED
Genesee & Wyoming Inc.
GWR
| $273K | ﹤0.01% |
37
+3
| +9% | +$240 |
|
2821
Boston Beer
SAM
$1.88B
| $272K | ﹤0.01% |
1,131
-443
| -28% | -$124K |
|
2822
CALL
Lincoln National
LNC
$7.91B
| $271K | ﹤0.01% |
53
-64
| -55% | -$3.89K |
|
2823
PUT
Dave & Buster's
PLAY
$343M
| $271K | ﹤0.01% |
61
-563
| -90% | -$31.6K |
|
|
NVRO
2824
DELISTED
NEVRO CORP.
NVRO
| $271K | ﹤0.01% |
+6,981
| New | +$310K |
|
|
BHVN
2825
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $271K | ﹤0.01% |
7,338
+3,152
| +75% | +$114K |
|
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.