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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
901
CALL
Raymond James Financial
RJF
$32.4B
| $248K | 0.01% |
426
-324
| -43% | -$14.3K |
|
902
Sibanye-Stillwater
SBSW
$5.97B
| $248K | 0.01% |
37,264
+17,834
| +92% | +$163K |
|
903
STMicroelectronics
STM
$47.7B
| $248K | 0.01% |
+21,915
| New | +$208K |
|
|
DD
904
CALL
DELISTED
Du Pont De Nemours E I
DD
| $248K | 0.01% |
1,418
+721
| +103% | +$51.2K |
|
|
BEAT
905
DELISTED
BioTelemetry, Inc.
BEAT
| $248K | 0.01% |
11,134
+7,885
| +243% | +$154K |
|
906
PUT
First Solar
FSLR
$22.1B
| $247K | 0.01% |
639
-477
| -43% | -$16.7K |
|
907
ProShares UltraShort QQQ
QID
$262M
| $247K | 0.01% |
+129
| New | +$252K |
|
908
Caterpillar
CAT
$412B
| $246K | 0.01% |
+2,659
| New | +$241K |
|
909
PUT
Cleveland-Cliffs
CLF
$6.25B
| $246K | 0.01% |
1,305
+240
| +23% | +$1.81K |
|
910
Rocket Pharmaceuticals
RCKT
$358M
| $246K | 0.01% |
10,091
+8,665
| +608% | +$247K |
|
911
PUT
UnitedHealth
UNH
$385B
| $246K | 0.01% |
3,857
+1,597
| +71% | +$239K |
|
912
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $246K | 0.01% |
748
+501
| +203% | +$40.8K |
|
|
OCLR
913
PUT
DELISTED
Oclaro Inc.
OCLR
| $246K | 0.01% |
1,045
+963
| +1,174% | +$8.32K |
|
914
CALL
MGM Resorts International
MGM
$11.5B
| $245K | 0.01% |
673
-1,556
| -70% | -$43.1K |
|
915
PUT
3M
MMM
$87.5B
| $245K | 0.01% |
2,941
-1,740
| -37% | -$251K |
|
|
MOMO
916
PUT
Hello Group
MOMO
$870M
| $245K | 0.01% |
569
-1,083
| -66% | -$23.9K |
|
917
CALL
Dave & Buster's
PLAY
$339M
| $245K | 0.01% |
154
-53
| -26% | -$2.46K |
|
918
Xylem
XYL
$27.8B
| $244K | 0.01% |
4,934
+4,626
| +1,502% | +$235K |
|
919
CALL
Intuitive Surgical
ISRG
$119B
| $243K | 0.01% |
2,088
+882
| +73% | +$64.8K |
|
920
CALL
Medtronic
MDT
$105B
| $243K | 0.01% |
2,224
+289
| +15% | +$22.7K |
|
|
MON
921
PUT
DELISTED
Monsanto Co
MON
| $243K | 0.01% |
717
-1,051
| -59% | -$108K |
|
922
AMN Healthcare
AMN
$1.28B
| $242K | 0.01% |
6,315
+538
| +9% | +$18.4K |
|
923
PUT
Skyworks Solutions
SWKS
$9.1B
| $242K | 0.01% |
1,240
-460
| -27% | -$35.4K |
|
924
Pan American Silver
PAAS
$18.6B
| $241K | 0.01% |
16,045
-53,464
| -77% | -$862K |
|
|
STZ.B
925
PUT
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $241K | 0.01% |
1,098
+276
| +34% | +$43.5K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.