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 | |
|---|---|---|---|---|---|---|
1676
ProShares UltraPro Short S&P 500
SPXU
$436M
| $1.59M | ﹤0.01% |
+794
| New | +$1.85M |
|
1677
Cheniere Energy
LNG
$56.5B
| $1.58M | ﹤0.01% |
25,948
+16,492
| +174% | +$1.02M |
|
1678
PUT
Allegiant Air
ALGT
$2.64B
| $1.58M | ﹤0.01% |
+91
| New | +$15.1K |
|
1679
CALL
Aecom
ACM
$9.07B
| $1.58M | ﹤0.01% |
367
-21
| -5% | -$870 |
|
1680
CALL
Invesco Aerospace & Defense ETF
PPA
$8.27B
| $1.58M | ﹤0.01% |
214
+185
| +638% | +$12.6K |
|
1681
PUT
Banco Bradesco
BBD
$38.1B
| $1.58M | ﹤0.01% |
2,304
+113
| +5% | +$708 |
|
1682
CALL
Cencora
COR
$60.3B
| $1.58M | ﹤0.01% |
186
+88
| +90% | +$7.54K |
|
1683
PUT
TechnipFMC
FTI
$30.6B
| $1.58M | ﹤0.01% |
991
-274
| -22% | -$4.25K |
|
1684
PUT
Manhattan Associates
MANH
$8.97B
| $1.58M | ﹤0.01% |
198
+4
| +2% | +$318 |
|
1685
State Street Technology Select Sector SPDR ETF
XLK
$115B
| $1.58M | ﹤0.01% |
+34,440
| New | +$1.47M |
|
1686
CALL
Western Union
WU
$2.57B
| $1.58M | ﹤0.01% |
589
+289
| +96% | +$7.49K |
|
1687
CALL
KB Home
KBH
$3.48B
| $1.58M | ﹤0.01% |
460
-515
| -53% | -$17.8K |
|
1688
CALL
TAL Education Group
TAL
$5.71B
| $1.58M | ﹤0.01% |
327
-443
| -58% | -$19K |
|
|
IPHI
1689
PUT
DELISTED
INPHI CORPORATION
IPHI
| $1.58M | ﹤0.01% |
213
+155
| +267% | +$10.6K |
|
1690
PUT
Canadian Natural Resources
CNQ
$96.9B
| $1.57M | ﹤0.01% |
994
+704
| +243% | +$9.56K |
|
|
LGF.A
1691
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $1.57M | ﹤0.01% |
147,643
-48,440
| -25% | -$446K |
|
1692
Advance Auto Parts
AAP
$3.37B
| $1.57M | ﹤0.01% |
9,817
-8,421
| -46% | -$1.35M |
|
|
SGMO
1693
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $1.57M | ﹤0.01% |
1,877
+1,218
| +185% | +$11.2K |
|
1694
PUT
Deckers Outdoor
DECK
$13.3B
| $1.57M | ﹤0.01% |
558
-1,314
| -70% | -$34.8K |
|
1695
CALL
Mattel
MAT
$4.17B
| $1.57M | ﹤0.01% |
1,158
+66
| +6% | +$783 |
|
|
NVO
1696
PUT
Novo Nordisk
NVO
$216B
| $1.57M | ﹤0.01% |
542
-836
| -61% | -$23.1K |
|
1697
PUT
Diageo
DEO
$46.2B
| $1.57M | ﹤0.01% |
93
-50
| -35% | -$8.13K |
|
1698
PUT
eHealth
EHTH
$42.5M
| $1.57M | ﹤0.01% |
163
+77
| +90% | +$5.98K |
|
1699
CALL
Masco
MAS
$16B
| $1.56M | ﹤0.01% |
326
-9
| -3% | -$409 |
|
1700
PUT
O-I Glass
OI
$1.39B
| $1.56M | ﹤0.01% |
1,307
+805
| +160% | +$8.03K |
|
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.