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 | |
|---|---|---|---|---|---|---|
926
CALL
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $326K | 0.01% |
4,390
+3,038
| +225% | +$126K |
|
|
WRI
927
DELISTED
Weingarten Realty Investors
WRI
| $326K | 0.01% |
+9,767
| New | +$341K |
|
928
PUT
TripAdvisor
TRIP
$1.57B
| $325K | 0.01% |
801
+583
| +267% | +$27.6K |
|
929
Graphic Packaging
GPK
$3.25B
| $324K | 0.01% |
25,245
+23,923
| +1,810% | +$311K |
|
930
Live Nation Entertainment
LYV
$41B
| $324K | 0.01% |
10,692
-11,638
| -52% | -$333K |
|
931
CALL
XPO
XPO
$25.1B
| $324K | 0.01% |
1,758
+653
| +59% | +$10.7K |
|
932
Azenta
AZTA
$1.3B
| $323K | 0.01% |
+14,462
| New | +$287K |
|
933
Hormel Foods
HRL
$13.8B
| $323K | 0.01% |
9,329
+7,264
| +352% | +$259K |
|
|
934
PUT
Micron Technology
MU
$1.12T
| $323K | 0.01% |
7,383
+2,708
| +58% | +$66.1K |
|
935
Toronto Dominion Bank
TD
$197B
| $322K | 0.01% |
+6,439
| New | +$329K |
|
|
MBT
936
DELISTED
Mobile TeleSystems Public Joint Stock Company American Depositary Shares (Each representing 2 Shares
MBT
| $322K | 0.01% |
+29,233
| New | +$303K |
|
937
NETGEAR
NTGR
$672M
| $321K | 0.01% |
+6,495
| New | +$355K |
|
|
WWAV
938
CALL
DELISTED
The WhiteWave Foods Company
WWAV
| $320K | 0.01% |
790
-576
| -42% | -$31.8K |
|
939
Teleflex
TFX
$5.81B
| $319K | 0.01% |
1,650
-2,354
| -59% | -$424K |
|
940
Veeva Systems
VEEV
$29.2B
| $319K | 0.01% |
+6,235
| New | +$280K |
|
941
PUT
AutoZone
AZO
$47.7B
| $318K | 0.01% |
285
+94
| +49% | +$69.6K |
|
942
CALL
Stratasys
SSYS
$695M
| $318K | 0.01% |
593
-61
| -9% | -$1.21K |
|
|
CONE
943
DELISTED
CyrusOne Inc Common Stock
CONE
| $318K | 0.01% |
6,188
-3,481
| -36% | -$171K |
|
944
Eagle Materials
EXP
$6.4B
| $317K | 0.01% |
+3,266
| New | +$333K |
|
945
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.25B
| $317K | 0.01% |
8,728
-44,193
| -84% | -$1.53M |
|
946
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.3M
| $317K | 0.01% |
4,279
+2,280
| +114% | +$170K |
|
947
PUT
Tucows
TCX
$101M
| $317K | 0.01% |
822
+769
| +1,451% | +$35.3K |
|
|
TWTR
948
CALL
DELISTED
Twitter, Inc.
TWTR
| $316K | 0.01% |
4,124
-4,926
| -54% | -$80K |
|
949
PetMed Express
PETS
$43.8M
| $315K | 0.01% |
+15,664
| New | +$331K |
|
950
CALL
Electronic Arts
EA
$52.4B
| $314K | 0.01% |
973
-123
| -11% | -$10.5K |
|
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.