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 | |
|---|---|---|---|---|---|---|
3201
PUT
Skywest
SKYW
$4.36B
| $323K | ﹤0.01% |
50
+12
| +32% | +$731 |
|
3202
CALL
3D Systems Corp
DDD
$430M
| $322K | ﹤0.01% |
369
+203
| +122% | +$1.76K |
|
|
OPLN
3203
PUT
Openlane
OPLN
$4.25B
| $322K | ﹤0.01% |
148
+92
| +164% | +$2.1K |
|
3204
PUT
Urban Outfitters
URBN
$6.22B
| $322K | ﹤0.01% |
116
-8
| -6% | -$222 |
|
|
POLY
3205
DELISTED
Plantronics, Inc.
POLY
| $322K | ﹤0.01% |
11,811
+3,928
| +50% | +$118K |
|
3206
PUT
Delek US
DK
$3.91B
| $321K | ﹤0.01% |
96
+52
| +118% | +$1.88K |
|
|
FOLD
3207
CALL
DELISTED
Amicus Therapeutics
FOLD
| $321K | ﹤0.01% |
330
+261
| +378% | +$2.39K |
|
3208
CALL
Sibanye-Stillwater
SBSW
$6.05B
| $321K | ﹤0.01% |
324
-14
| -4% | -$108 |
|
3209
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.3B
| $321K | ﹤0.01% |
+1,243
| New | +$350K |
|
|
VER
3210
PUT
DELISTED
VEREIT, Inc.
VER
| $321K | ﹤0.01% |
70
+13
| +23% | +$623 |
|
3211
CALL
American States Water
AWR
$3.38B
| $320K | ﹤0.01% |
37
-19
| -34% | -$1.68K |
|
3212
Black Stone Minerals
BSM
$3.16B
| $320K | ﹤0.01% |
25,184
+2,625
| +12% | +$33.4K |
|
3213
CALL
Nordic American Tanker
NAT
$1.37B
| $320K | ﹤0.01% |
652
+346
| +113% | +$1.32K |
|
3214
Toronto Dominion Bank
TD
$197B
| $320K | ﹤0.01% |
5,711
+281
| +5% | +$15.9K |
|
|
AFTY
3215
PUT
DELISTED
Pacer CSOP FTSE China A50 ETF
AFTY
| $320K | ﹤0.01% |
184
-25
| -12% | -$434 |
|
|
APRN
3216
CALL
DELISTED
Blue Apron Holdings, Inc. Class A Common Stock
APRN
| $320K | ﹤0.01% |
41
-36
| -47% | -$3.27K |
|
3217
Chemours
CC
$2.54B
| $319K | ﹤0.01% |
17,642
+2,449
| +16% | +$40.7K |
|
3218
CALL
City Holding Co
CHCO
$2.03B
| $319K | ﹤0.01% |
39
-35
| -47% | -$2.77K |
|
3219
PUT
Freshpet
FRPT
$2.93B
| $319K | ﹤0.01% |
54
-224
| -81% | -$11.9K |
|
3220
CALL
Genesis Energy
GEL
$1.81B
| $319K | ﹤0.01% |
156
+44
| +39% | +$886 |
|
3221
CALL
Itron
ITRI
$3.7B
| $319K | ﹤0.01% |
38
+37
| +3,700% | +$2.91K |
|
3222
PUT
Upwork
UPWK
$1.15B
| $319K | ﹤0.01% |
299
-131
| -30% | -$1.65K |
|
3223
CALL
Gossamer Bio
GOSS
$96.5M
| $318K | ﹤0.01% |
204
-83
| -29% | -$1.67K |
|
3224
PUT
Lamb Weston
LW
$7.34B
| $318K | ﹤0.01% |
37
-79
| -68% | -$6.36K |
|
3225
CALL
Brown-Forman Class B
BF.B
$12.6B
| $317K | ﹤0.01% |
47
-73
| -61% | -$4.74K |
|
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.