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 | |
|---|---|---|---|---|---|---|
876
PUT
GoPro
GPRO
$121M
| $356K | 0.02% |
2,393
+673
| +39% | +$6.1K |
|
|
VMW
877
DELISTED
VMware, Inc
VMW
| $356K | 0.02% |
+3,867
| New | +$340K |
|
|
TWX
878
CALL
DELISTED
Time Warner Inc
TWX
| $356K | 0.02% |
2,422
+156
| +7% | +$15.1K |
|
879
PUT
BHP
BHP
$213B
| $355K | 0.02% |
1,616
+585
| +57% | +$20.2K |
|
880
State Street SPDR S&P Oil & Gas Equipment & Services ETF
XES
$383M
| $353K | 0.02% |
+1,759
| New | +$381K |
|
881
CALL
Check Point Software Technologies
CHKP
$13B
| $352K | 0.02% |
536
+513
| +2,230% | +$50.3K |
|
882
CALL
Altria Group
MO
$120B
| $352K | 0.02% |
1,966
-528
| -21% | -$38.2K |
|
883
iShares MSCI Malaysia ETF
EWM
$306M
| $351K | 0.02% |
11,545
+7,836
| +211% | +$232K |
|
884
Molson Coors Class B
TAP
$7.47B
| $351K | 0.02% |
+3,674
| New | +$359K |
|
885
CALL
Simon Property Group
SPG
$73.1B
| $349K | 0.02% |
406
+216
| +114% | +$38.6K |
|
|
GAP
886
PUT
The Gap Inc
GAP
$6.76B
| $348K | 0.02% |
2,465
+1,202
| +95% | +$28.7K |
|
887
PUT
Dollar Tree
DLTR
$22.7B
| $347K | 0.02% |
1,467
+899
| +158% | +$69.1K |
|
888
PUT
MetLife
MET
$59.6B
| $347K | 0.02% |
3,276
+819
| +33% | +$39K |
|
|
POT
889
CALL
DELISTED
Potash Corp Of Saskatchewan
POT
| $347K | 0.02% |
1,420
-1,371
| -49% | -$24.8K |
|
890
Allegiant Air
ALGT
$2.52B
| $346K | 0.02% |
2,162
+1,954
| +939% | +$329K |
|
|
RDS.B
891
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $346K | 0.02% |
+6,214
| New | +$353K |
|
892
CF Industries
CF
$19.3B
| $344K | 0.01% |
+11,731
| New | +$383K |
|
893
Enpro
NPO
$7.11B
| $344K | 0.01% |
+4,845
| New | +$321K |
|
|
OMED
894
DELISTED
OncoMed Pharmaceuticals, Inc.
OMED
| $344K | 0.01% |
37,436
+20,151
| +117% | +$177K |
|
895
CALL
Marathon Petroleum
MPC
$91.8B
| $341K | 0.01% |
2,004
+297
| +17% | +$14.8K |
|
|
ESRX
896
CALL
DELISTED
Express Scripts Holding Company
ESRX
| $341K | 0.01% |
1,770
+695
| +65% | +$47.8K |
|
897
Axcelis
ACLS
$4.33B
| $340K | 0.01% |
18,094
+12,791
| +241% | +$201K |
|
898
Invesco DB Agriculture Fund
DBA
$1.26B
| $340K | 0.01% |
17,222
+16,916
| +5,528% | +$345K |
|
899
PUT
General Mills
GIS
$19.1B
| $339K | 0.01% |
1,911
-299
| -14% | -$18.3K |
|
900
L3Harris
LHX
$55.7B
| $339K | 0.01% |
+3,055
| New | +$327K |
|
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.