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 | |
|---|---|---|---|---|---|---|
2576
PUT
Howard Hughes
HHH
$3.93B
| $595K | ﹤0.01% |
49
+8
| +20% | +$888 |
|
2577
CALL
Green Plains
GPRE
$1.19B
| $594K | ﹤0.01% |
385
+118
| +44% | +$1.6K |
|
2578
PUT
KBR
KBR
$4.68B
| $594K | ﹤0.01% |
195
+194
| +19,400% | +$5.46K |
|
2579
PUT
BlackLine
BL
$1.69B
| $592K | ﹤0.01% |
115
+88
| +326% | +$4.39K |
|
2580
PUT
Landstar System
LSTR
$6.8B
| $592K | ﹤0.01% |
52
+20
| +63% | +$2.26K |
|
|
ATRS
2581
PUT
DELISTED
Antares Pharma, Inc.
ATRS
| $592K | ﹤0.01% |
1,260
+94
| +8% | +$385 |
|
2582
CALL
Commerce Bancshares
CBSH
$8.5B
| $591K | ﹤0.01% |
113
-102
| -47% | -$4.76K |
|
2583
Canadian Natural Resources
CNQ
$96.9B
| $591K | ﹤0.01% |
37,318
+11,775
| +46% | +$160K |
|
2584
ProShares Ultra Silver
AGQ
$1.16B
| $590K | ﹤0.01% |
18,660
-7,913
| -30% | -$239K |
|
|
MYOK
2585
CALL
DELISTED
MyoKardia, Inc. Common Stock
MYOK
| $590K | ﹤0.01% |
81
+54
| +200% | +$3.27K |
|
|
ADVM
2586
CALL
DELISTED
Adverum Biotechnologies
ADVM
| $589K | ﹤0.01% |
51
-26
| -34% | -$2.29K |
|
2587
PUT
Tencent Music
TME
$14.5B
| $588K | ﹤0.01% |
501
-878
| -64% | -$11.3K |
|
|
TECD
2588
CALL
DELISTED
Tech Data Corp
TECD
| $588K | ﹤0.01% |
41
+34
| +486% | +$4.37K |
|
2589
Invesco S&P 500 Low Volatility ETF
SPLV
$7.2B
| $587K | ﹤0.01% |
10,075
+6,008
| +148% | +$345K |
|
2590
AstraZeneca
AZN
$263B
| $585K | ﹤0.01% |
5,872
-2,421
| -29% | -$228K |
|
2591
PUT
Genesis Energy
GEL
$1.84B
| $583K | ﹤0.01% |
285
+245
| +613% | +$4.93K |
|
2592
PUT
Vipshop
VIPS
$6.84B
| $582K | ﹤0.01% |
411
+1
| +0.2% | +$12 |
|
|
CPE
2593
CALL
DELISTED
Callon Petroleum Company
CPE
| $582K | ﹤0.01% |
121
-23
| -16% | -$952 |
|
2594
CALL
Gogo Inc
GOGO
$515M
| $581K | ﹤0.01% |
909
-118
| -11% | -$687 |
|
|
TIVO
2595
DELISTED
Tivo Inc
TIVO
| $581K | ﹤0.01% |
68,600
-40,703
| -37% | -$322K |
|
|
UFS
2596
PUT
DELISTED
DOMTAR CORPORATION (New)
UFS
| $581K | ﹤0.01% |
152
+58
| +62% | +$2.15K |
|
2597
PUT
Plains GP Holdings
PAGP
$5.23B
| $579K | ﹤0.01% |
306
+202
| +194% | +$3.79K |
|
|
AMRN
2598
Amarin Corp
AMRN
$284M
| $578K | ﹤0.01% |
1,349
-362
| -21% | -$137K |
|
|
HEES
2599
CALL
DELISTED
H&E Equipment Services
HEES
| $578K | ﹤0.01% |
173
+115
| +198% | +$3.73K |
|
2600
CALL
Loews
L
$24.3B
| $577K | ﹤0.01% |
110
+101
| +1,122% | +$5.09K |
|
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.