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 | |
|---|---|---|---|---|---|---|
3626
Estee Lauder
EL
$30.1B
| $225K | ﹤0.01% |
1,090
-4,794
| -81% | -$931K |
|
|
KW
3627
CALL
DELISTED
Kennedy-Wilson Holdings
KW
| $225K | ﹤0.01% |
101
-51
| -34% | -$1.14K |
|
|
CONN
3628
PUT
DELISTED
Conn's Inc.
CONN
| $225K | ﹤0.01% |
182
-125
| -41% | -$2.62K |
|
|
UFS
3629
CALL
DELISTED
DOMTAR CORPORATION (New)
UFS
| $225K | ﹤0.01% |
59
-103
| -64% | -$3.81K |
|
3630
PUT
Adtran
ADTN
$769M
| $224K | ﹤0.01% |
227
+73
| +47% | +$696 |
|
3631
Arcos Dorados Holdings
ARCO
$1.75B
| $224K | ﹤0.01% |
+28,516
| New | +$206K |
|
3632
CALL
Delek US
DK
$3.95B
| $224K | ﹤0.01% |
67
-237
| -78% | -$8.55K |
|
3633
CALL
Freshpet
FRPT
$2.92B
| $224K | ﹤0.01% |
38
-23
| -38% | -$1.23K |
|
|
HOUS
3634
CALL
DELISTED
Anywhere Real Estate
HOUS
| $224K | ﹤0.01% |
232
-175
| -43% | -$1.61K |
|
3635
CALL
Prospect Capital
PSEC
$1.12B
| $224K | ﹤0.01% |
348
+77
| +28% | +$502 |
|
3636
PUT
Caleres
CAL
$420M
| $223K | ﹤0.01% |
94
+12
| +15% | +$271 |
|
3637
Goodyear
GT
$2.04B
| $223K | ﹤0.01% |
14,382
-23,804
| -62% | -$372K |
|
3638
CALL
Rush Enterprises Class A
RUSHA
$5.98B
| $223K | ﹤0.01% |
108
-117
| -52% | -$2.28K |
|
|
SA
3639
Seabridge Gold
SA
$2.82B
| $223K | ﹤0.01% |
16,183
+5,411
| +50% | +$68.5K |
|
3640
PUT
AeroVironment
AVAV
$7.81B
| $222K | ﹤0.01% |
36
-20
| -36% | -$1.2K |
|
3641
BlackLine
BL
$1.8B
| $222K | ﹤0.01% |
+4,319
| New | +$216K |
|
3642
Sunrun
RUN
$2.38B
| $222K | ﹤0.01% |
16,146
-2,882
| -15% | -$43K |
|
|
QEP
3643
DELISTED
QEP RESOURCES, INC.
QEP
| $222K | ﹤0.01% |
+49,385
| New | +$172K |
|
3644
Ligand Pharmaceuticals
LGND
$5.96B
| $221K | ﹤0.01% |
3,411
+2,154
| +171% | +$144K |
|
|
MASI
3645
CALL
DELISTED
Masimo
MASI
| $221K | ﹤0.01% |
14
-85
| -86% | -$12.8K |
|
3646
iShares National Muni Bond ETF
MUB
$45.2B
| $221K | ﹤0.01% |
1,944
-455
| -19% | -$51.8K |
|
|
HEP
3647
CALL
DELISTED
Holly Energy Partners, L.P.
HEP
| $221K | ﹤0.01% |
100
-17
| -15% | -$386 |
|
|
BPYU
3648
CALL
DELISTED
Brookfield Property REIT Inc. Class A Common Stock
BPYU
| $221K | ﹤0.01% |
120
-80
| -40% | -$1.51K |
|
|
CLSD
3649
DELISTED
Clearside Biomedical
CLSD
| $220K | ﹤0.01% |
5,058
+5,028
| +16,760% | +$106K |
|
|
EMBJ
3650
CALL
Embraer S.A. ADS
EMBJ
$12.1B
| $220K | ﹤0.01% |
113
+1
| +0.9% | +$18 |
|
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.