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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2926
CALL
Genworth Financial
GNW
$3.8B
| $703K | ﹤0.01% |
140,100
+102,900
| +277% | +$570K |
|
2927
Rapid7
RPD
$634M
| $703K | ﹤0.01% |
15,331
+5,357
| +54% | +$228K |
|
2928
CALL
Global Ship Lease
GSL
$1.57B
| $702K | ﹤0.01% |
37,500
+800
| +2% | +$14.9K |
|
2929
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
$368M
| $702K | ﹤0.01% |
16,664
-4,183
| -20% | -$159K |
|
2930
PUT
Huazhu Hotels Group
HTHT
$12.4B
| $700K | ﹤0.01% |
14,300
-73,000
| -84% | -$3.54M |
|
2931
PUT
Howmet Aerospace
HWM
$116B
| $699K | ﹤0.01% |
16,500
+8,400
| +104% | +$344K |
|
2932
Olin
OLN
$2.64B
| $699K | ﹤0.01% |
+12,603
| New | +$721K |
|
|
DQ
2933
CALL
Daqo New Energy
DQ
$790M
| $697K | ﹤0.01% |
14,900
-20,900
| -58% | -$960K |
|
2934
CALL
Amplitude
AMPL
$1.07B
| $696K | ﹤0.01% |
56,000
+34,000
| +155% | +$452K |
|
2935
PUT
LoveSac
LOVE
$239M
| $696K | ﹤0.01% |
24,100
+16,300
| +209% | +$430K |
|
|
GRTX
2936
CALL
DELISTED
Galera Therapeutics, Inc. Common Stock
GRTX
| $695K | ﹤0.01% |
+271,700
| New | +$561K |
|
2937
CALL
Cal-Maine
CALM
$4.28B
| $694K | ﹤0.01% |
11,400
+6,400
| +128% | +$357K |
|
2938
USA Compression Partners
USAC
$3.82B
| $694K | ﹤0.01% |
32,885
+26,513
| +416% | +$545K |
|
2939
CALL
Payoneer
PAYO
$2.41B
| $692K | ﹤0.01% |
110,200
+39,900
| +57% | +$237K |
|
2940
CALL
Bread Financial
BFH
$4.21B
| $691K | ﹤0.01% |
22,800
+13,800
| +153% | +$517K |
|
2941
SIGA Technologies
SIGA
$223M
| $690K | ﹤0.01% |
+120,086
| New | +$802K |
|
|
BKI
2942
PUT
DELISTED
Black Knight, Inc. Common Stock
BKI
| $690K | ﹤0.01% |
12,000
+11,900
| +11,900% | +$712K |
|
2943
PUT
Collegium Pharmaceutical
COLL
$1.14B
| $688K | ﹤0.01% |
+28,700
| New | +$761K |
|
2944
PUT
Albertsons Companies
ACI
$5.4B
| $687K | ﹤0.01% |
33,100
-61,200
| -65% | -$1.26M |
|
2945
PUT
Alkermes
ALKS
$8.82B
| $687K | ﹤0.01% |
24,400
+19,600
| +408% | +$534K |
|
2946
PUT
Allot
ALLT
$374M
| $687K | ﹤0.01% |
255,500
+47,200
| +23% | +$153K |
|
2947
Ally Financial
ALLY
$13.1B
| $687K | ﹤0.01% |
+26,954
| New | +$773K |
|
2948
CALL
Tandem Diabetes Care
TNDM
$1.17B
| $686K | ﹤0.01% |
16,900
+8,800
| +109% | +$364K |
|
2949
CALL
CNX Resources
CNX
$4.85B
| $685K | ﹤0.01% |
42,800
-93,000
| -68% | -$1.48M |
|
2950
PUT
Vicor
VICR
$9.62B
| $685K | ﹤0.01% |
14,600
+14,000
| +2,333% | +$777K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.