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 | |
|---|---|---|---|---|---|---|
2626
Pricesmart
PSMT
$5.75B
| $560K | ﹤0.01% |
7,894
-15,484
| -66% | -$1.11M |
|
2627
CALL
Unilever
UL
$131B
| $560K | ﹤0.01% |
87
-133
| -60% | -$8.83K |
|
|
LL
2628
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $559K | ﹤0.01% |
573
-123
| -18% | -$1.15K |
|
|
KEM
2629
PUT
DELISTED
KEMET Corporation
KEM
| $559K | ﹤0.01% |
207
-487
| -70% | -$11.8K |
|
|
ESPR
2630
DELISTED
Esperion Therapeutics
ESPR
| $558K | ﹤0.01% |
9,373
+3,472
| +59% | +$156K |
|
2631
CALL
Williams-Sonoma
WSM
$26.7B
| $558K | ﹤0.01% |
152
-290
| -66% | -$10.1K |
|
|
CBPO
2632
PUT
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $558K | ﹤0.01% |
48
-268
| -85% | -$31K |
|
2633
CALL
AudioCodes
AUDC
$244M
| $557K | ﹤0.01% |
217
+119
| +121% | +$2.6K |
|
2634
CALL
Denali Therapeutics
DNLI
$3.67B
| $557K | ﹤0.01% |
320
+305
| +2,033% | +$5.08K |
|
2635
CALL
PENN Entertainment
PENN
$2.74B
| $557K | ﹤0.01% |
218
+102
| +88% | +$2.27K |
|
2636
CALL
OGE Energy
OGE
$10.3B
| $555K | ﹤0.01% |
125
+55
| +79% | +$2.38K |
|
2637
PUT
Vicor
VICR
$9.62B
| $555K | ﹤0.01% |
119
-10
| -8% | -$381 |
|
|
QIWI
2638
PUT
DELISTED
QIWI PLC
QIWI
| $555K | ﹤0.01% |
287
+99
| +53% | +$1.93K |
|
2639
CALL
Cogent Communications
CCOI
$594M
| $552K | ﹤0.01% |
84
-80
| -49% | -$4.83K |
|
2640
PUT
Eversource Energy
ES
$28.2B
| $552K | ﹤0.01% |
65
+9
| +16% | +$748 |
|
|
PRO
2641
PUT
DELISTED
PROS Holdings
PRO
| $551K | ﹤0.01% |
92
+31
| +51% | +$1.79K |
|
|
TCF
2642
PUT
DELISTED
TCF Financial Corporation Common Stock
TCF
| $551K | ﹤0.01% |
118
-434
| -79% | -$18K |
|
|
GES
2643
PUT
DELISTED
Guess Inc
GES
| $550K | ﹤0.01% |
246
-107
| -30% | -$1.99K |
|
2644
Dave & Buster's
PLAY
$343M
| $550K | ﹤0.01% |
13,701
+8,675
| +173% | +$347K |
|
|
AVYA
2645
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $550K | ﹤0.01% |
40,775
-31,977
| -44% | -$393K |
|
2646
PUT
Avery Dennison
AVY
$12.3B
| $549K | ﹤0.01% |
+42
| New | +$5.3K |
|
2647
CALL
CVR Energy
CVI
$3.36B
| $549K | ﹤0.01% |
136
+52
| +62% | +$2.29K |
|
2648
CALL
Dana Inc
DAN
$2.91B
| $549K | ﹤0.01% |
302
-21
| -7% | -$350 |
|
2649
CALL
Levi Strauss
LEVI
$9.44B
| $549K | ﹤0.01% |
285
-762
| -73% | -$13.6K |
|
2650
PUT
Rithm Capital
RITM
$5.09B
| $549K | ﹤0.01% |
341
-138
| -29% | -$2.17K |
|
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.