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 | |
|---|---|---|---|---|---|---|
926
State Street Communication Services Select Sector SPDR ETF
XLC
$21.7B
| $9.65M | 0.01% |
166,434
+104,998
| +171% | +$5.7M |
|
927
PUT
Ovintiv
OVV
$17.3B
| $9.64M | 0.01% |
267,100
-98,800
| -27% | -$4.36M |
|
928
CALL
Chubb
CB
$137B
| $9.63M | 0.01% |
49,600
-23,900
| -33% | -$5.02M |
|
|
MPT
929
CALL
Medical Properties Trust
MPT
$2.87B
| $9.62M | 0.01% |
1,170,100
+190,000
| +19% | +$2.1M |
|
930
CALL
LyondellBasell Industries
LYB
$19.9B
| $9.6M | 0.01% |
102,200
+61,300
| +150% | +$5.7M |
|
931
Workday
WDAY
$31.6B
| $9.57M | 0.01% |
+46,328
| New | +$8.43M |
|
932
CALL
Floor & Decor
FND
$5.73B
| $9.57M | 0.01% |
97,400
+22,800
| +31% | +$2.05M |
|
933
PUT
Mondelez International
MDLZ
$77.1B
| $9.54M | 0.01% |
136,900
-79,300
| -37% | -$5.25M |
|
934
CALL
Gaming and Leisure Properties
GLPI
$12.6B
| $9.54M | 0.01% |
183,300
+23,600
| +15% | +$1.23M |
|
935
CALL
QuantumScape Corp
QS
$3.15B
| $9.52M | 0.01% |
1,163,800
-649,200
| -36% | -$5.27M |
|
936
Marvell Technology
MRVL
$188B
| $9.51M | 0.01% |
219,701
+144,248
| +191% | +$6.07M |
|
937
PUT
Intercontinental Exchange
ICE
$81B
| $9.51M | 0.01% |
91,200
+28,100
| +45% | +$2.93M |
|
938
PUT
L3Harris
LHX
$55.8B
| $9.5M | 0.01% |
48,400
+36,200
| +297% | +$7.4M |
|
939
CALL
Cintas
CTAS
$81.3B
| $9.48M | 0.01% |
82,000
+31,600
| +63% | +$3.48M |
|
|
IPFF
940
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $9.45M | 0.01% |
222,400
-229,800
| -51% | -$9.76M |
|
941
iShares China Large-Cap ETF
FXI
$4.29B
| $9.43M | 0.01% |
319,302
-1,264,636
| -80% | -$38M |
|
942
CALL
Kohl's
KSS
$2.06B
| $9.42M | 0.01% |
400,000
+10,700
| +3% | +$302K |
|
943
PUT
Old Dominion Freight Line
ODFL
$48B
| $9.41M | 0.01% |
55,200
+31,200
| +130% | +$5.22M |
|
|
TWO
944
CALL
Two Harbors Investment
TWO
$1.27B
| $9.36M | 0.01% |
636,200
+104,300
| +20% | +$1.7M |
|
|
LSI
945
CALL
DELISTED
Life Storage, Inc.
LSI
| $9.33M | 0.01% |
71,200
+70,100
| +6,373% | +$8.11M |
|
946
CALL
Canadian Imperial Bank of Commerce
CM
$106B
| $9.31M | 0.01% |
219,600
+114,000
| +108% | +$5M |
|
947
CALL
iShares Convertible Bond ETF
ICVT
$7.37B
| $9.27M | 0.01% |
292,500
+159,700
| +120% | +$11.6M |
|
948
CALL
Logitech
LOGI
$14.8B
| $9.22M | 0.01% |
158,900
+69,500
| +78% | +$3.95M |
|
949
CALL
Darden Restaurants
DRI
$22.2B
| $9.2M | 0.01% |
59,300
-14,000
| -19% | -$2.07M |
|
950
PUT
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.3M
| $9.2M | 0.01% |
493,100
-74,900
| -13% | -$6.85M |
|
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.