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 | |
|---|---|---|---|---|---|---|
2901
CALL
Assembly Biosciences
ASMB
$506M
| $28K | ﹤0.01% |
2
+1
| +100% | +$245 |
|
2902
CALL
Buckle
BKE
$2.19B
| $28K | ﹤0.01% |
489
+395
| +420% | +$7.96K |
|
|
BRFS
2903
PUT
DELISTED
BRF SA
BRFS
| $28K | ﹤0.01% |
+315
| New | +$4.24K |
|
2904
PUT
Dycom Industries
DY
$12.9B
| $28K | ﹤0.01% |
410
+133
| +48% | +$11.3K |
|
2905
PUT
Estee Lauder
EL
$29B
| $28K | ﹤0.01% |
562
+189
| +51% | +$15.6K |
|
2906
Empire State Realty Trust
ESRT
$976M
| $28K | ﹤0.01% |
1,391
-397
| -22% | -$8.2K |
|
|
EXK
2907
Endeavour Silver
EXK
$2.32B
| $28K | ﹤0.01% |
8,816
+5,653
| +179% | +$22.1K |
|
|
DMC
2908
Del Monte Corp
DMC
$1.35B
| $28K | ﹤0.01% |
+484
| New | +$28.4K |
|
2909
CALL
GATX Corp
GATX
$6.55B
| $28K | ﹤0.01% |
218
+197
| +938% | +$11.6K |
|
2910
CALL
Greif
GEF
$4.47B
| $28K | ﹤0.01% |
91
-47
| -34% | -$2.61K |
|
2911
CALL
Graco
GGG
$12.9B
| $28K | ﹤0.01% |
114
+78
| +217% | +$2.35K |
|
2912
CALL
Hyatt Hotels
H
$17.6B
| $28K | ﹤0.01% |
193
+158
| +451% | +$8.51K |
|
2913
PUT
Harley-Davidson
HOG
$2.68B
| $28K | ﹤0.01% |
573
-485
| -46% | -$28.5K |
|
|
IMOS
2914
CALL
ChipMOS TECHNOLOGIES
IMOS
$1.92B
| $28K | ﹤0.01% |
+172
| New | +$3.24K |
|
2915
CALL
Jazz Pharmaceuticals
JAZZ
$15.9B
| $28K | ﹤0.01% |
47
-49
| -51% | -$6.38K |
|
|
LTC
2916
PUT
LTC Properties
LTC
$2.16B
| $28K | ﹤0.01% |
116
-5
| -4% | -$234 |
|
2917
CALL
Mohawk Industries
MHK
$6.9B
| $28K | ﹤0.01% |
60
+8
| +15% | +$1.76K |
|
2918
CALL
MillerKnoll
MLKN
$1.5B
| $28K | ﹤0.01% |
+146
| New | +$4.52K |
|
|
NGD
2919
PUT
DELISTED
New Gold Inc
NGD
| $28K | ﹤0.01% |
617
+441
| +251% | +$1.43K |
|
2920
PUT
Plains All American Pipeline
PAA
$17.4B
| $28K | ﹤0.01% |
206
+45
| +28% | +$1.42K |
|
|
TEF
2921
CALL
DELISTED
Telefonica
TEF
| $28K | ﹤0.01% |
787
+528
| +204% | +$4.35K |
|
2922
PUT
Travelers Companies
TRV
$80.8B
| $28K | ﹤0.01% |
50
-280
| -85% | -$33.7K |
|
2923
Global X Uranium ETF
URA
$5.54B
| $28K | ﹤0.01% |
1,877
+739
| +65% | +$12.1K |
|
2924
Vanguard Health Care ETF
VHT
$18.2B
| $28K | ﹤0.01% |
+205
| New | +$27.6K |
|
|
ATSG
2925
CALL
DELISTED
Air Transport Services Group
ATSG
| $28K | ﹤0.01% |
691
+516
| +295% | +$8.4K |
|
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.