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 | |
|---|---|---|---|---|---|---|
|
NEWR
2976
PUT
DELISTED
New Relic, Inc.
NEWR
| $234K | ﹤0.01% |
29
-74
| -72% | -$6.23K |
|
|
GTT
2977
CALL
DELISTED
GTT Communications, Inc.
GTT
| $234K | ﹤0.01% |
99
-27
| -21% | -$908 |
|
2978
Abercrombie & Fitch
ANF
$4.39B
| $233K | ﹤0.01% |
+11,642
| New | +$218K |
|
2979
BorgWarner
BWA
$12.9B
| $233K | ﹤0.01% |
7,644
+2,941
| +63% | +$98.6K |
|
2980
CALL
Harmony Gold Mining
HMY
$9.85B
| $233K | ﹤0.01% |
1,305
+1,243
| +2,005% | +$2.18K |
|
2981
PUT
Global X MSCI Norway ETF
NORW
$85M
| $233K | ﹤0.01% |
236
+7
| +3% | +$146 |
|
2982
ProShares Ultra QQQ
QLD
$12.4B
| $233K | ﹤0.01% |
+27,824
| New | +$280K |
|
|
CPE
2983
DELISTED
Callon Petroleum Company
CPE
| $233K | ﹤0.01% |
+3,605
| New | +$348K |
|
|
PVG
2984
PUT
DELISTED
PRETIUM RESOURCES INC.
PVG
| $233K | ﹤0.01% |
276
-1,356
| -83% | -$10.6K |
|
|
VAR
2985
DELISTED
Varian Medical Systems, Inc.
VAR
| $233K | ﹤0.01% |
2,063
-5,415
| -72% | -$619K |
|
2986
CALL
America Movil
AMX
$77.5B
| $232K | ﹤0.01% |
163
+131
| +409% | +$1.88K |
|
2987
CALL
Chord Energy
CHRD
$7.5B
| $232K | ﹤0.01% |
421
-273
| -39% | -$2.48K |
|
2988
Galicia Financial Group
GGAL
$8B
| $232K | ﹤0.01% |
8,416
-4,147
| -33% | -$105K |
|
2989
Stride
LRN
$3.88B
| $232K | ﹤0.01% |
+9,395
| New | +$200K |
|
2990
CALL
Toyota
TM
$214B
| $232K | ﹤0.01% |
20
-147
| -88% | -$17.4K |
|
2991
CALL
Varonis Systems
VRNS
$5.35B
| $232K | ﹤0.01% |
132
-129
| -49% | -$2.55K |
|
|
EMBJ
2992
Embraer S.A. ADS
EMBJ
$12B
| $231K | ﹤0.01% |
10,446
-14,386
| -58% | -$306K |
|
2993
CALL
ITT
ITT
$17.4B
| $231K | ﹤0.01% |
48
-15
| -24% | -$792 |
|
2994
PUT
Coherent
COHR
$50.9B
| $230K | ﹤0.01% |
71
-53
| -43% | -$1.98K |
|
2995
PUT
Republic Services
RSG
$67B
| $230K | ﹤0.01% |
32
-5
| -14% | -$366 |
|
2996
PUT
SPS Commerce
SPSC
$2.42B
| $230K | ﹤0.01% |
+56
| New | +$2.44K |
|
2997
PUT
Teekay
TK
$970M
| $230K | ﹤0.01% |
691
+469
| +211% | +$2.57K |
|
|
VTLE
2998
DELISTED
Vital Energy
VTLE
| $230K | ﹤0.01% |
+3,180
| New | +$334K |
|
|
GHDX
2999
DELISTED
Genomic Health, Inc.
GHDX
| $230K | ﹤0.01% |
+3,586
| New | +$251K |
|
3000
BGC Group
BGC
$5.59B
| $229K | ﹤0.01% |
44,465
-39,970
| -47% | -$263K |
|
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.