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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1626
CALL
Tencent Music
TME
$14.5B
| $4.87M | ﹤0.01% |
435,400
+146,400
| +51% | +$1.44M |
|
1627
Caesars Entertainment
CZR
$6.1B
| $4.87M | ﹤0.01% |
111,349
+10,121
| +10% | +$438K |
|
1628
CALL
Keurig Dr Pepper
KDP
$40.4B
| $4.87M | ﹤0.01% |
158,800
-131,600
| -45% | -$4.05M |
|
1629
PUT
Camtek
CAMT
$6.9B
| $4.86M | ﹤0.01% |
58,000
+47,300
| +442% | +$3.72M |
|
|
GES
1630
CALL
DELISTED
Guess Inc
GES
| $4.85M | ﹤0.01% |
154,200
+44,900
| +41% | +$1.11M |
|
1631
PUT
Zoetis
ZTS
$31.6B
| $4.84M | ﹤0.01% |
28,600
+700
| +3% | +$131K |
|
1632
CALL
Lattice Semiconductor
LSCC
$17.6B
| $4.81M | ﹤0.01% |
61,500
+36,200
| +143% | +$2.59M |
|
1633
Charter Communications
CHTR
$14.7B
| $4.81M | ﹤0.01% |
+16,547
| New | +$5.32M |
|
1634
PUT
iShares Gold Trust
IAU
$63B
| $4.79M | ﹤0.01% |
114,100
+100,700
| +751% | +$3.95M |
|
1635
CALL
Baxter International
BAX
$11.6B
| $4.79M | ﹤0.01% |
112,100
-594,000
| -84% | -$24.2M |
|
1636
Vertex Pharmaceuticals
VRTX
$121B
| $4.78M | ﹤0.01% |
+11,435
| New | +$4.83M |
|
1637
CALL
Omega Healthcare
OHI
$15.4B
| $4.76M | ﹤0.01% |
150,400
+3,900
| +3% | +$119K |
|
1638
CALL
Extra Space Storage
EXR
$31.2B
| $4.76M | ﹤0.01% |
32,400
-52,000
| -62% | -$7.58M |
|
1639
Viking Therapeutics
VKTX
$4.04B
| $4.75M | ﹤0.01% |
+57,999
| New | +$2.58M |
|
1640
PUT
Cincinnati Financial
CINF
$28.3B
| $4.74M | ﹤0.01% |
38,200
+28,200
| +282% | +$3.18M |
|
1641
CALL
Nextpower Inc
NXT
$15.2B
| $4.74M | ﹤0.01% |
84,300
+27,100
| +47% | +$1.44M |
|
|
1642
CALL
Camtek
CAMT
$6.9B
| $4.74M | ﹤0.01% |
56,600
+36,300
| +179% | +$2.85M |
|
1643
CALL
Public Storage
PSA
$60.2B
| $4.73M | ﹤0.01% |
16,300
+5,900
| +57% | +$1.69M |
|
1644
CALL
TG Therapeutics
TGTX
$8.58B
| $4.73M | ﹤0.01% |
310,800
-23,300
| -7% | -$371K |
|
1645
CALL
Kinsale Capital Group
KNSL
$7.95B
| $4.72M | ﹤0.01% |
9,000
-8,500
| -49% | -$3.84M |
|
1646
CALL
Tilray
TLRY
$479M
| $4.72M | ﹤0.01% |
191,000
-112,160
| -37% | -$2.16M |
|
1647
PUT
Chord Energy
CHRD
$7.79B
| $4.71M | ﹤0.01% |
26,400
+23,200
| +725% | +$3.73M |
|
1648
PUT
Huntington Bancshares
HBAN
$35.1B
| $4.71M | ﹤0.01% |
337,300
+18,900
| +6% | +$245K |
|
1649
PUT
Rambus
RMBS
$10.4B
| $4.7M | ﹤0.01% |
76,000
+30,500
| +67% | +$1.93M |
|
1650
CALL
Old Dominion Freight Line
ODFL
$48.5B
| $4.69M | ﹤0.01% |
21,400
-55,200
| -72% | -$11.5M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.