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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1576
Zymeworks
ZYME
$1.68B
| $1.79M | ﹤0.01% |
39,379
+23,547
| +149% | +$856K |
|
1577
PUT
Ultragenyx Pharmaceutical
RARE
$2.65B
| $1.79M | ﹤0.01% |
419
+204
| +95% | +$8.42K |
|
1578
Targa Resources
TRGP
$60.4B
| $1.79M | ﹤0.01% |
43,788
+27,807
| +174% | +$1.08M |
|
1579
CALL
Chemours
CC
$2.59B
| $1.78M | ﹤0.01% |
987
+159
| +19% | +$2.64K |
|
|
BERY
1580
DELISTED
Berry Global Group, Inc.
BERY
| $1.78M | ﹤0.01% |
+40,791
| New | +$1.62M |
|
|
GWPH
1581
CALL
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $1.78M | ﹤0.01% |
170
-74
| -30% | -$8.3K |
|
1582
PUT
Federal Realty Investment Trust
FRT
$10.9B
| $1.78M | ﹤0.01% |
138
+135
| +4,500% | +$17.9K |
|
1583
CALL
Wingstop
WING
$3.68B
| $1.78M | ﹤0.01% |
206
+162
| +368% | +$13.4K |
|
|
NLSN
1584
PUT
DELISTED
Nielsen Holdings plc
NLSN
| $1.78M | ﹤0.01% |
875
-1,184
| -58% | -$24.1K |
|
1585
CALL
Bread Financial
BFH
$4.21B
| $1.77M | ﹤0.01% |
198
-219
| -53% | -$19.3K |
|
1586
PUT
BlackBerry
BB
$5.01B
| $1.77M | ﹤0.01% |
2,754
+1,037
| +60% | +$5.69K |
|
|
1587
CALL
BlackBerry
BB
$5.01B
| $1.76M | ﹤0.01% |
2,747
+1,512
| +122% | +$8.3K |
|
1588
VF Corp
VFC
$6.68B
| $1.76M | ﹤0.01% |
+17,693
| New | +$1.59M |
|
|
NBIS
1589
Nebius Group N.V.
NBIS
$47.7B
| $1.76M | ﹤0.01% |
40,519
+30,065
| +288% | +$1.12M |
|
|
MIK
1590
CALL
DELISTED
Michaels Stores, Inc
MIK
| $1.76M | ﹤0.01% |
2,178
-211
| -9% | -$1.77K |
|
1591
PUT
Abercrombie & Fitch
ANF
$4.17B
| $1.76M | ﹤0.01% |
1,016
-104
| -9% | -$1.72K |
|
1592
CALL
Banco Macro
BMA
$5.7B
| $1.75M | ﹤0.01% |
484
+454
| +1,513% | +$12.2K |
|
1593
PUT
Dillards
DDS
$8.87B
| $1.75M | ﹤0.01% |
238
+80
| +51% | +$5.67K |
|
1594
Nektar Therapeutics
NKTR
$2.39B
| $1.75M | ﹤0.01% |
5,399
+2,149
| +66% | +$623K |
|
1595
CALL
Lamb Weston
LW
$6.85B
| $1.75M | ﹤0.01% |
203
+120
| +145% | +$9.67K |
|
1596
PUT
The Mosaic Company
MOS
$7.09B
| $1.75M | ﹤0.01% |
807
+110
| +16% | +$2.18K |
|
1597
CALL
Signet Jewelers
SIG
$3.55B
| $1.75M | ﹤0.01% |
803
+435
| +118% | +$7.72K |
|
|
FLG
1598
PUT
Flagstar Bank National Association
FLG
$5.77B
| $1.74M | ﹤0.01% |
483
+466
| +2,741% | +$17.2K |
|
|
XYZ
1599
Block Inc
XYZ
$45.9B
| $1.74M | ﹤0.01% |
27,820
-116,013
| -81% | -$7.41M |
|
1600
CALL
J.M. Smucker
SJM
$12.6B
| $1.74M | ﹤0.01% |
167
-227
| -58% | -$24K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.