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 | |
|---|---|---|---|---|---|---|
4801
CALL
Progress Software
PRGS
$1.65B
| $4K | ﹤0.01% |
+111
| New | +$3.22K |
|
4802
Ring Energy
REI
$289M
| $4K | ﹤0.01% |
436
-45,741
| -99% | -$556K |
|
4803
PUT
Robert Half
RHI
$4.04B
| $4K | ﹤0.01% |
+30
| New | +$1.45K |
|
4804
PUT
Rithm Capital
RITM
$5.46B
| $4K | ﹤0.01% |
185
+29
| +19% | +$475 |
|
4805
PUT
Raymond James Financial
RJF
$33.8B
| $4K | ﹤0.01% |
69
+34
| +97% | +$1.73K |
|
4806
CALL
Rockwell Medical
RMTI
$27.2M
| $4K | ﹤0.01% |
1
-3
| -75% | -$1.98K |
|
4807
CALL
Rogers Corp
ROG
$2.17B
| $4K | ﹤0.01% |
+20
| New | +$1.64K |
|
4808
PUT
Red Robin
RRGB
$137M
| $4K | ﹤0.01% |
152
+113
| +290% | +$5.67K |
|
4809
ProShares Short Russell2000
RWM
$132M
| $4K | ﹤0.01% |
95
-147
| -61% | -$7.08K |
|
|
FLNA
4810
Filana Therapeutics
FLNA
$42.7M
| $4K | ﹤0.01% |
799
+699
| +699% | +$3.17K |
|
4811
Sibanye-Stillwater
SBSW
$5.93B
| $4K | ﹤0.01% |
555
-36,709
| -99% | -$291K |
|
4812
CALL
Stepan Co
SCL
$1.32B
| $4K | ﹤0.01% |
+26
| New | +$2.03K |
|
4813
Amplify Junior Silver Miners ETF
SILJ
$3.19B
| $4K | ﹤0.01% |
325
-927
| -74% | -$12.9K |
|
4814
abrdn Physical Silver Shares ETF
SIVR
$3.97B
| $4K | ﹤0.01% |
273
-2,539
| -90% | -$43.4K |
|
4815
CALL
Sunoco
SUN
$14.3B
| $4K | ﹤0.01% |
229
+33
| +17% | +$875 |
|
4816
PUT
Smith & Wesson
SWBI
$656M
| $4K | ﹤0.01% |
55
-104
| -65% | -$1.59K |
|
4817
PUT
Stryker
SYK
$132B
| $4K | ﹤0.01% |
34
-343
| -91% | -$43.3K |
|
4818
PUT
Teradata
TDC
$2.77B
| $4K | ﹤0.01% |
198
+193
| +3,860% | +$5.83K |
|
4819
CALL
Thomson Reuters
TRI
$45.3B
| $4K | ﹤0.01% |
48
-154
| -76% | -$7.86K |
|
4820
PUT
TC Energy
TRP
$70.7B
| $4K | ﹤0.01% |
34
-7
| -17% | -$326 |
|
4821
TransUnion
TRU
$16.2B
| $4K | ﹤0.01% |
+107
| New | +$3.76K |
|
4822
PUT
Titan International
TWI
$532M
| $4K | ﹤0.01% |
13
-267
| -95% | -$3.17K |
|
4823
CALL
TherapeuticsMD
TXMD
$23.7M
| $4K | ﹤0.01% |
4
-13
| -76% | -$4.02K |
|
4824
PUT
UDR
UDR
$12.8B
| $4K | ﹤0.01% |
+10
| New | +$358 |
|
|
UNIT
4825
PUT
Uniti Group
UNIT
$2.56B
| $4K | ﹤0.01% |
47
-253
| -84% | -$6.74K |
|
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.