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 | |
|---|---|---|---|---|---|---|
1551
PUT
Ball Corp
BALL
$17B
| $1.11M | ﹤0.01% |
241
-27
| -10% | -$1.26K |
|
1552
BP
BP
$113B
| $1.11M | ﹤0.01% |
+30,172
| New | +$1.2M |
|
1553
CALL
Equifax
EFX
$20.3B
| $1.11M | ﹤0.01% |
119
-24
| -17% | -$2.55K |
|
|
VCRA
1554
DELISTED
VOCERA COMMUNICATIONS, INC.
VCRA
| $1.11M | ﹤0.01% |
28,167
+24,176
| +606% | +$874K |
|
1555
CALL
Huntsman Corp
HUN
$2.24B
| $1.1M | ﹤0.01% |
573
-976
| -63% | -$20.9K |
|
|
HOME
1556
PUT
DELISTED
At Home Group Inc.
HOME
| $1.1M | ﹤0.01% |
592
+581
| +5,282% | +$14.8K |
|
|
SRG
1557
CALL
Seritage Growth Properties
SRG
$130M
| $1.1M | ﹤0.01% |
340
+134
| +65% | +$5.19K |
|
1558
Goodyear
GT
$2.07B
| $1.1M | ﹤0.01% |
53,809
+11,307
| +27% | +$245K |
|
1559
PUT
Southern Company
SO
$110B
| $1.1M | ﹤0.01% |
250
-725
| -74% | -$33K |
|
1560
CALL
MBIA
MBI
$288M
| $1.09M | ﹤0.01% |
1,228
+627
| +104% | +$5.97K |
|
1561
CALL
Baker Hughes
BKR
$56.8B
| $1.09M | ﹤0.01% |
509
+191
| +60% | +$4.88K |
|
1562
Ciena
CIEN
$55.3B
| $1.09M | ﹤0.01% |
32,291
+3,625
| +13% | +$115K |
|
|
JAG
1563
CALL
DELISTED
Jagged Peak Energy Inc.
JAG
| $1.09M | ﹤0.01% |
1,200
+152
| +15% | +$1.82K |
|
1564
Hilton Grand Vacations
HGV
$3.84B
| $1.09M | ﹤0.01% |
41,430
+37,836
| +1,053% | +$1.1M |
|
|
DM
1565
PUT
DELISTED
Dominion Energy Midstream Ptr LP
DM
| $1.09M | ﹤0.01% |
606
+20
| +3% | +$368 |
|
|
GBT
1566
CALL
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $1.09M | ﹤0.01% |
266
-155
| -37% | -$5.81K |
|
1567
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $1.09M | ﹤0.01% |
124
+74
| +148% | +$7.2K |
|
1568
Howmet Aerospace
HWM
$116B
| $1.09M | ﹤0.01% |
84,122
-31,575
| -27% | -$493K |
|
1569
PUT
Toll Brothers
TOL
$14B
| $1.08M | ﹤0.01% |
329
-186
| -36% | -$5.97K |
|
1570
PUT
Designer Brands
DBI
$277M
| $1.08M | ﹤0.01% |
437
+291
| +199% | +$7.81K |
|
1571
J.M. Smucker
SJM
$12.6B
| $1.08M | ﹤0.01% |
11,521
+7,104
| +161% | +$742K |
|
1572
PUT
Silgan Holdings
SLGN
$4.91B
| $1.08M | ﹤0.01% |
+456
| New | +$11.5K |
|
1573
CALL
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.08M | ﹤0.01% |
281
+153
| +120% | +$6.59K |
|
1574
PUT
Wheaton Precious Metals
WPM
$50.6B
| $1.08M | ﹤0.01% |
551
+443
| +410% | +$7.55K |
|
1575
PUT
Archer Daniels Midland
ADM
$41.4B
| $1.07M | ﹤0.01% |
262
+160
| +157% | +$7.46K |
|
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.