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 | |
|---|---|---|---|---|---|---|
826
DexCom
DXCM
$27.1B
| $383K | 0.02% |
18,124
+6,988
| +63% | +$136K |
|
827
CALL
PNC Financial Services
PNC
$98.8B
| $383K | 0.02% |
1,144
+328
| +40% | +$40.2K |
|
|
AERI
828
DELISTED
Aerie Pharmaceuticals
AERI
| $383K | 0.02% |
8,466
+1,169
| +16% | +$52.1K |
|
829
CALL
Intel
INTC
$506B
| $382K | 0.02% |
3,112
-3,786
| -55% | -$137K |
|
830
CALL
Seagate
STX
$208B
| $382K | 0.02% |
1,068
-582
| -35% | -$25.8K |
|
831
State Street Technology Select Sector SPDR ETF
XLK
$116B
| $382K | 0.02% |
+14,336
| New | +$370K |
|
|
OIL
832
DELISTED
Barclays Bank PLC iPath Exchange Traded Notes Linked to Goldman Sachs Crude Oil Total Return In
OIL
| $382K | 0.02% |
68,460
+56,658
| +480% | +$334K |
|
833
CALL
Eaton
ETN
$160B
| $381K | 0.02% |
1,341
+503
| +60% | +$35.7K |
|
834
Fortive
FTV
$18.5B
| $380K | 0.02% |
10,030
+9,285
| +1,246% | +$333K |
|
|
LTC
835
LTC Properties
LTC
$2.17B
| $380K | 0.02% |
7,946
-371
| -4% | -$17.4K |
|
836
Terex
TEX
$7.88B
| $380K | 0.02% |
+12,110
| New | +$380K |
|
|
DDC
837
DELISTED
Dominion Diamond Corporation
DDC
| $380K | 0.02% |
30,119
+5,172
| +21% | +$52.2K |
|
838
CALL
Costco
COST
$408B
| $379K | 0.02% |
1,303
+723
| +125% | +$121K |
|
839
Ternium
TX
$9.22B
| $379K | 0.02% |
14,511
+12,986
| +852% | +$323K |
|
840
CALL
Coca-Cola
KO
$351B
| $377K | 0.02% |
5,470
+2,367
| +76% | +$98.7K |
|
|
BEAT
841
CALL
DELISTED
BioTelemetry, Inc.
BEAT
| $377K | 0.02% |
1,064
+851
| +400% | +$21.1K |
|
|
CRC
842
DELISTED
California Resources Corporation
CRC
| $376K | 0.02% |
25,035
+4,548
| +22% | +$83.5K |
|
843
Sunoco
SUN
$14.2B
| $375K | 0.02% |
15,530
-9,399
| -38% | -$249K |
|
|
TRCO
844
DELISTED
TRIBUNE MEDIA COMPANY CLASS A
TRCO
| $373K | 0.02% |
10,017
-1,933
| -16% | -$65.5K |
|
|
BNY
845
CALL
Bank of New York Mellon
BNY
$108B
| $372K | 0.02% |
821
-858
| -51% | -$40.1K |
|
846
CALL
iShares Silver Trust
SLV
$27.8B
| $372K | 0.02% |
3,751
+2,810
| +299% | +$46.5K |
|
847
PUT
BP
BP
$114B
| $371K | 0.02% |
1,406
-506
| -26% | -$15.4K |
|
848
Pentair
PNR
$10B
| $370K | 0.02% |
+8,778
| New | +$351K |
|
849
Myriad Genetics
MYGN
$538M
| $369K | 0.02% |
19,238
+15,106
| +366% | +$268K |
|
|
MNK
850
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $369K | 0.02% |
+8,283
| New | +$409K |
|
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.