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 | |
|---|---|---|---|---|---|---|
2901
CALL
The GEO Group
GEO
$4.11B
| $252K | ﹤0.01% |
128
+14
| +12% | +$318 |
|
2902
CALL
ICU Medical
ICUI
$4.01B
| $252K | ﹤0.01% |
11
-43
| -80% | -$10.6K |
|
2903
PUT
Southern Copper
SCCO
$138B
| $252K | ﹤0.01% |
88
+82
| +1,367% | +$2.77K |
|
2904
CALL
Goodyear
GT
$2.04B
| $251K | ﹤0.01% |
123
+23
| +23% | +$498 |
|
2905
PUT
Icahn Enterprises
IEP
$5.15B
| $251K | ﹤0.01% |
44
-236
| -84% | -$15.7K |
|
2906
Eversource Energy
ES
$28.2B
| $250K | ﹤0.01% |
+3,848
| New | +$251K |
|
|
SRDX
2907
CALL
DELISTED
Surmodics
SRDX
| $250K | ﹤0.01% |
53
+26
| +96% | +$1.56K |
|
|
HRC
2908
DELISTED
HILL-ROM HOLDINGS, INC.
HRC
| $250K | ﹤0.01% |
2,828
+2,515
| +804% | +$228K |
|
2909
CALL
Kite Realty
KRG
$6B
| $249K | ﹤0.01% |
177
-19
| -10% | -$299 |
|
2910
PUT
Tower Semiconductor
TSEM
$24.6B
| $249K | ﹤0.01% |
169
+112
| +196% | +$1.87K |
|
2911
ANI Pharmaceuticals
ANIP
$1.79B
| $248K | ﹤0.01% |
+5,524
| New | +$290K |
|
|
ARR
2912
CALL
Armour Residential REIT
ARR
$2.02B
| $248K | ﹤0.01% |
24
+15
| +167% | +$1.62K |
|
2913
Portland General Electric
POR
$5.97B
| $248K | ﹤0.01% |
+5,413
| New | +$254K |
|
2914
Shenandoah Telecom
SHEN
$632M
| $248K | ﹤0.01% |
+5,621
| New | +$240K |
|
2915
PUT
Glaukos
GKOS
$8.83B
| $247K | ﹤0.01% |
44
+41
| +1,367% | +$2.46K |
|
|
MOMO
2916
Hello Group
MOMO
$875M
| $247K | ﹤0.01% |
10,439
-40,886
| -80% | -$1.29M |
|
2917
Regions Financial
RF
$26.2B
| $247K | ﹤0.01% |
18,477
-6,753
| -27% | -$108K |
|
2918
PUT
Rithm Capital
RITM
$5.17B
| $247K | ﹤0.01% |
174
-114
| -40% | -$1.93K |
|
2919
PUT
Steven Madden
SHOO
$3.18B
| $247K | ﹤0.01% |
79
+71
| +888% | +$2.19K |
|
|
TWO
2920
PUT
Two Harbors Investment
TWO
$1.27B
| $247K | ﹤0.01% |
48
+44
| +1,100% | +$2.51K |
|
2921
CALL
Heron Therapeutics
HRTX
$87.4M
| $246K | ﹤0.01% |
95
-3
| -3% | -$82 |
|
2922
CALL
Huron Consulting
HURN
$1.86B
| $246K | ﹤0.01% |
48
+38
| +380% | +$1.93K |
|
2923
MongoDB
MDB
$25.1B
| $246K | ﹤0.01% |
2,940
-24,571
| -89% | -$1.89M |
|
2924
PUT
MSC Industrial Direct
MSM
$6.98B
| $246K | ﹤0.01% |
32
-14
| -30% | -$1.16K |
|
2925
Repligen
RGEN
$7.42B
| $246K | ﹤0.01% |
+4,680
| New | +$274K |
|
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.