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 | |
|---|---|---|---|---|---|---|
876
PUT
Goodyear
GT
$2.02B
| $2.85M | 0.01% |
1,398
-283
| -17% | -$6.13K |
|
|
HUYA
877
CALL
Huya Inc
HUYA
$551M
| $2.85M | 0.01% |
1,842
-272
| -13% | -$5.05K |
|
878
Las Vegas Sands
LVS
$30.5B
| $2.83M | 0.01% |
54,464
-16,271
| -23% | -$882K |
|
879
CALL
Jack Henry & Associates
JKHY
$10.5B
| $2.81M | 0.01% |
222
+189
| +573% | +$26.8K |
|
880
PUT
Under Armour Class C
UA
$2.81B
| $2.81M | 0.01% |
1,658
+225
| +16% | +$4.26K |
|
|
SBNY
881
PUT
DELISTED
Signature Bank
SBNY
| $2.81M | 0.01% |
273
-8
| -3% | -$900 |
|
882
CALL
Cboe Global Markets
CBOE
$29.8B
| $2.8M | 0.01% |
286
+125
| +78% | +$13K |
|
883
UnitedHealth
UNH
$385B
| $2.8M | 0.01% |
11,225
+545
| +5% | +$144K |
|
884
PUT
MongoDB
MDB
$24.1B
| $2.79M | 0.01% |
333
-245
| -42% | -$18.8K |
|
885
PUT
ArcelorMittal
MT
$49.9B
| $2.79M | 0.01% |
1,348
+1,012
| +301% | +$25K |
|
|
KFYP
886
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $2.78M | 0.01% |
743
+29
| +4% | +$784 |
|
887
PUT
NetApp
NTAP
$32.3B
| $2.77M | 0.01% |
465
-32
| -6% | -$2.3K |
|
888
CALL
AerCap
AER
$23.4B
| $2.77M | 0.01% |
700
-13
| -2% | -$651 |
|
889
CALL
Rithm Capital
RITM
$5.01B
| $2.77M | 0.01% |
1,949
+819
| +72% | +$13.8K |
|
890
PepsiCo
PEP
$184B
| $2.77M | 0.01% |
+25,038
| New | +$2.82M |
|
891
CALL
Hershey
HSY
$34.9B
| $2.75M | 0.01% |
257
+98
| +62% | +$10.4K |
|
892
PUT
Illinois Tool Works
ITW
$79.7B
| $2.75M | 0.01% |
217
+126
| +138% | +$16.6K |
|
893
CALL
Apollo Global Management
APO
$68.6B
| $2.75M | 0.01% |
1,119
+1,081
| +2,845% | +$31K |
|
|
KFYP
894
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $2.74M | 0.01% |
733
+155
| +27% | +$4.19K |
|
|
GAP
895
PUT
The Gap Inc
GAP
$6.8B
| $2.72M | 0.01% |
1,057
+172
| +19% | +$4.6K |
|
896
CALL
Exelixis
EXEL
$14B
| $2.72M | 0.01% |
1,382
+625
| +83% | +$11.1K |
|
897
PUT
IQVIA
IQV
$34.6B
| $2.72M | 0.01% |
234
+144
| +160% | +$17.4K |
|
|
CRC
898
CALL
DELISTED
California Resources Corporation
CRC
| $2.71M | 0.01% |
1,590
+774
| +95% | +$22K |
|
899
PUT
Bank OZK
OZK
$5.47B
| $2.71M | 0.01% |
1,186
+888
| +298% | +$24.6K |
|
900
CALL
Amdocs
DOX
$5.4B
| $2.69M | 0.01% |
459
-191
| -29% | -$12K |
|
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.