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 | |
|---|---|---|---|---|---|---|
2851
CALL
TE Connectivity
TEL
$58.8B
| $30K | ﹤0.01% |
164
-149
| -48% | -$11K |
|
|
TGB
2852
Trekor Metals
TGB
$2.56B
| $30K | ﹤0.01% |
+22,994
| New | +$30.2K |
|
2853
PUT
Thor Industries
THO
$3.99B
| $30K | ﹤0.01% |
103
-97
| -49% | -$10.1K |
|
2854
CALL
ZTO Express
ZTO
$18.2B
| $30K | ﹤0.01% |
719
+655
| +1,023% | +$8.48K |
|
|
ATCO
2855
PUT
DELISTED
Atlas Corp.
ATCO
| $30K | ﹤0.01% |
96
+67
| +231% | +$554 |
|
|
DRE
2856
DELISTED
Duke Realty Corp.
DRE
| $30K | ﹤0.01% |
+1,179
| New | +$30.3K |
|
|
GNC
2857
CALL
DELISTED
GNC Holdings, Inc.
GNC
| $30K | ﹤0.01% |
629
-35
| -5% | -$301 |
|
|
ELLI
2858
CALL
DELISTED
Ellie Mae Inc
ELLI
| $30K | ﹤0.01% |
248
+108
| +77% | +$9.92K |
|
|
FINL
2859
DELISTED
Finish Line
FINL
| $30K | ﹤0.01% |
2,133
-21,657
| -91% | -$364K |
|
2860
PUT
Autodesk
ADSK
$44.3B
| $29K | ﹤0.01% |
184
-199
| -52% | -$16.7K |
|
2861
PUT
American Eagle Outfitters
AEO
$2.85B
| $29K | ﹤0.01% |
109
-63
| -37% | -$936 |
|
2862
Allegion
ALLE
$13B
| $29K | ﹤0.01% |
+391
| New | +$27.6K |
|
2863
PUT
Altisource Portfolio Solutions
ASPS
$65.4M
| $29K | ﹤0.01% |
9
-53
| -85% | -$11.7K |
|
|
BHR
2864
PUT
Braemar Hotels & Resorts
BHR
$153M
| $29K | ﹤0.01% |
+216
| New | +$2.69K |
|
2865
CALL
Bankunited
BKU
$3.38B
| $29K | ﹤0.01% |
258
+200
| +345% | +$7.61K |
|
2866
PUT
Clorox
CLX
$11.6B
| $29K | ﹤0.01% |
265
+221
| +502% | +$28.6K |
|
2867
Donaldson
DCI
$10.8B
| $29K | ﹤0.01% |
+642
| New | +$27.8K |
|
2868
PUT
DHT Holdings
DHT
$2.97B
| $29K | ﹤0.01% |
773
+706
| +1,054% | +$3.27K |
|
2869
CALL
DTE Energy
DTE
$31.1B
| $29K | ﹤0.01% |
157
+97
| +162% | +$8.21K |
|
2870
EnerSys
ENS
$6.95B
| $29K | ﹤0.01% |
+376
| New | +$29.3K |
|
2871
PUT
GSK
GSK
$103B
| $29K | ﹤0.01% |
371
-29
| -7% | -$1.47K |
|
2872
CALL
Hecla Mining
HL
$10.2B
| $29K | ﹤0.01% |
434
-111
| -20% | -$641 |
|
2873
CALL
Hovnanian Enterprises
HOV
$785M
| $29K | ﹤0.01% |
23
+16
| +229% | +$945 |
|
2874
CALL
Huntsman Corp
HUN
$2.24B
| $29K | ﹤0.01% |
201
-2,012
| -91% | -$43.3K |
|
2875
PUT
ING
ING
$93.8B
| $29K | ﹤0.01% |
+745
| New | +$10.9K |
|
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.