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 | |
|---|---|---|---|---|---|---|
851
PUT
HubSpot
HUBS
$9.73B
| $2.95M | 0.01% |
235
-67
| -22% | -$8.78K |
|
852
PUT
CDW
CDW
$16.6B
| $2.95M | 0.01% |
364
+43
| +13% | +$3.7K |
|
|
APHA
853
PUT
DELISTED
Aphria Inc. Common Shares
APHA
| $2.94M | 0.01% |
+5,173
| New | +$40.8K |
|
854
CALL
Suncor Energy
SU
$78.4B
| $2.94M | 0.01% |
1,052
+90
| +9% | +$2.99K |
|
855
Direxion Daily Financial Bull 3x ETF
FAS
$2.35B
| $2.94M | 0.01% |
+65,655
| New | +$3.78M |
|
|
ZAYO
856
CALL
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $2.94M | 0.01% |
1,286
+1,057
| +462% | +$28.9K |
|
857
CALL
Enterprise Products Partners
EPD
$83.9B
| $2.94M | 0.01% |
1,194
+573
| +92% | +$15.3K |
|
858
PUT
Liberty Global Class C
LBTYK
$3.37B
| $2.93M | 0.01% |
1,389
+580
| +72% | +$13.9K |
|
859
Herbalife
HLF
$1.22B
| $2.93M | 0.01% |
49,747
+41,713
| +519% | +$2.3M |
|
860
CALL
Oneok
OKE
$58.7B
| $2.93M | 0.01% |
543
+326
| +150% | +$20.2K |
|
861
CALL
Plains All American Pipeline
PAA
$17.4B
| $2.93M | 0.01% |
1,462
+678
| +86% | +$15.5K |
|
862
CALL
Harley-Davidson
HOG
$2.79B
| $2.93M | 0.01% |
858
+550
| +179% | +$21.6K |
|
863
CALL
PTC
PTC
$13.1B
| $2.92M | 0.01% |
352
-48
| -12% | -$4.21K |
|
|
LM
864
PUT
DELISTED
Legg Mason, Inc.
LM
| $2.9M | 0.01% |
1,136
+896
| +373% | +$25.1K |
|
865
PUT
Trade Desk
TTD
$7.89B
| $2.89M | 0.01% |
2,490
-1,130
| -31% | -$14.1K |
|
866
Centene
CNC
$31.5B
| $2.88M | 0.01% |
+50,054
| New | +$3.35M |
|
867
PUT
Tyson Foods
TSN
$20B
| $2.88M | 0.01% |
540
+295
| +120% | +$17.3K |
|
868
PUT
A.O. Smith
AOS
$8.2B
| $2.88M | 0.01% |
674
+564
| +513% | +$25.9K |
|
|
ICPT
869
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $2.87M | 0.01% |
285
+50
| +21% | +$5.18K |
|
870
CALL
NRG Energy
NRG
$30.2B
| $2.87M | 0.01% |
725
+206
| +40% | +$7.88K |
|
|
GOLD
871
CALL
DELISTED
Randgold Resources Ltd
GOLD
| $2.87M | 0.01% |
351
-332
| -49% | -$26.8K |
|
872
CALL
Agnico Eagle Mines
AEM
$72.3B
| $2.87M | 0.01% |
710
+447
| +170% | +$16.5K |
|
873
PUT
Global Payments
GPN
$21.3B
| $2.87M | 0.01% |
278
+240
| +632% | +$26.4K |
|
874
PUT
Southwest Airlines
LUV
$21.9B
| $2.87M | 0.01% |
617
+455
| +281% | +$24.2K |
|
875
PUT
LyondellBasell Industries
LYB
$19.9B
| $2.86M | 0.01% |
344
-664
| -66% | -$60.7K |
|
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.