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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
DCH
1901
Dauch Corp
DCH
$1.3B
| $84K | ﹤0.01% |
4,492
-19,189
| -81% | -$383K |
|
1902
CALL
Deutsche Bank
DB
$66.3B
| $84K | ﹤0.01% |
2,060
-2,100
| -50% | -$36.4K |
|
1903
PUT
Gogo Inc
GOGO
$515M
| $84K | ﹤0.01% |
1,323
+852
| +181% | +$8.57K |
|
1904
PUT
Southwest Airlines
LUV
$22.1B
| $84K | ﹤0.01% |
610
+361
| +145% | +$19.4K |
|
1905
CALL
Nucor
NUE
$56.4B
| $84K | ﹤0.01% |
1,573
+910
| +137% | +$55.6K |
|
1906
CALL
Prudential Financial
PRU
$41.7B
| $84K | ﹤0.01% |
163
-418
| -72% | -$45.1K |
|
1907
PUT
TJX Companies
TJX
$170B
| $84K | ﹤0.01% |
1,766
+1,034
| +141% | +$39.9K |
|
1908
Union Pacific
UNP
$183B
| $84K | ﹤0.01% |
800
-28,179
| -97% | -$3.01M |
|
|
EPZM
1909
CALL
DELISTED
Epizyme, Inc
EPZM
| $84K | ﹤0.01% |
278
+244
| +718% | +$3.25K |
|
|
XLRN
1910
PUT
DELISTED
Acceleron Pharma
XLRN
| $84K | ﹤0.01% |
70
+20
| +40% | +$527 |
|
|
TIF
1911
CALL
DELISTED
Tiffany & Co.
TIF
| $84K | ﹤0.01% |
191
-572
| -75% | -$48.8K |
|
|
ZAYO
1912
CALL
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $84K | ﹤0.01% |
474
+240
| +103% | +$7.65K |
|
|
SEMG
1913
DELISTED
SEMGROUP CORPORATION
SEMG
| $84K | ﹤0.01% |
+2,336
| New | +$88.8K |
|
|
P
1914
PUT
DELISTED
Pandora Media Inc
P
| $84K | ﹤0.01% |
1,008
+543
| +117% | +$6.82K |
|
|
RHT
1915
CALL
DELISTED
Red Hat Inc
RHT
| $84K | ﹤0.01% |
952
+820
| +621% | +$65.2K |
|
1916
Banco Bilbao Vizcaya Argentaria
BBVA
$144B
| $83K | ﹤0.01% |
10,979
-1,988
| -15% | -$13.5K |
|
1917
CALL
Canadian Natural Resources
CNQ
$96.9B
| $83K | ﹤0.01% |
1,221
+1,082
| +778% | +$16.4K |
|
1918
PUT
Melco Resorts & Entertainment
MLCO
$2.1B
| $83K | ﹤0.01% |
858
+640
| +294% | +$11K |
|
1919
Intellia Therapeutics
NTLA
$1.5B
| $83K | ﹤0.01% |
+5,920
| New | +$79.4K |
|
1920
Old Republic International
ORI
$10.3B
| $83K | ﹤0.01% |
+4,087
| New | +$82.5K |
|
1921
PUT
Piper Sandler
PIPR
$5.14B
| $83K | ﹤0.01% |
+440
| New | +$7.79K |
|
1922
CALL
ProShares UltraShort Industrials
SIJ
$5.74M
| $83K | ﹤0.01% |
133
-16
| -11% | -$6.28K |
|
1923
PUT
VF Corp
VFC
$6.68B
| $83K | ﹤0.01% |
390
+245
| +169% | +$12.1K |
|
1924
CALL
Viatris
VTRS
$20.1B
| $83K | ﹤0.01% |
3,630
+2,151
| +145% | +$86.7K |
|
|
WBA
1925
DELISTED
Walgreens Boots Alliance
WBA
| $83K | ﹤0.01% |
1,005
-35,019
| -97% | -$2.94M |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.