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 | |
|---|---|---|---|---|---|---|
2351
PUT
Comstock Resources
CRK
$3.97B
| $2.13M | ﹤0.01% |
229,800
+150,900
| +191% | +$1.24M |
|
2352
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $2.13M | ﹤0.01% |
34,802
-12,558
| -27% | -$784K |
|
2353
CALL
Bit Digital
BTBT
$484M
| $2.13M | ﹤0.01% |
742,000
+162,700
| +28% | +$448K |
|
2354
PUT
Schrodinger
SDGR
$1.12B
| $2.13M | ﹤0.01% |
78,800
+17,300
| +28% | +$484K |
|
2355
DexCom
DXCM
$27.6B
| $2.13M | ﹤0.01% |
+15,327
| New | +$1.93M |
|
2356
PUT
Otis Worldwide
OTIS
$27.4B
| $2.12M | ﹤0.01% |
21,400
+8,200
| +62% | +$758K |
|
2357
CALL
Plains GP Holdings
PAGP
$5.23B
| $2.12M | ﹤0.01% |
116,400
-97,500
| -46% | -$1.64M |
|
2358
PUT
Jacobs Solutions
J
$15.9B
| $2.12M | ﹤0.01% |
16,684
-7,495
| -31% | -$879K |
|
|
RAPT
2359
PUT
DELISTED
RAPT Therapeutics
RAPT
| $2.12M | ﹤0.01% |
29,525
+23,237
| +370% | +$3.23M |
|
|
AY
2360
PUT
DELISTED
Atlantica Sustainable Infrastructure plc Ordinary Shares
AY
| $2.12M | ﹤0.01% |
114,800
+97,000
| +545% | +$1.83M |
|
2361
PUT
Sweetgreen
SG
$713M
| $2.12M | ﹤0.01% |
83,800
-89,900
| -52% | -$1.31M |
|
2362
CALL
First Majestic Silver
AG
$8.05B
| $2.12M | ﹤0.01% |
359,800
-588,000
| -62% | -$2.95M |
|
2363
PUT
Chegg
CHGG
$108M
| $2.11M | ﹤0.01% |
278,700
-112,400
| -29% | -$1.03M |
|
2364
Direxion Daily Energy Bull 2X ETF
ERX
$249M
| $2.11M | ﹤0.01% |
29,749
-66,215
| -69% | -$3.9M |
|
2365
CALL
Chord Energy
CHRD
$7.79B
| $2.1M | ﹤0.01% |
11,800
+1,200
| +11% | +$193K |
|
2366
CALL
JELD-WEN Holding
JELD
$94.8M
| $2.1M | ﹤0.01% |
99,100
+98,100
| +9,810% | +$1.83M |
|
2367
CALL
Waters Corp
WAT
$36.8B
| $2.1M | ﹤0.01% |
6,100
+2,400
| +65% | +$789K |
|
2368
CALL
Joby Aviation
JOBY
$6.82B
| $2.1M | ﹤0.01% |
391,500
-87,800
| -18% | -$498K |
|
2369
Tower Semiconductor
TSEM
$26.4B
| $2.1M | ﹤0.01% |
+62,670
| New | +$1.95M |
|
2370
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$21.4B
| $2.1M | ﹤0.01% |
+22,788
| New | +$2.03M |
|
2371
CALL
Organon & Co
OGN
$3.55B
| $2.09M | ﹤0.01% |
111,300
-94,500
| -46% | -$1.62M |
|
2372
CALL
Fortrea Holdings
FTRE
$1.85B
| $2.09M | ﹤0.01% |
52,100
+11,000
| +27% | +$381K |
|
2373
CALL
VICI Properties
VICI
$29.4B
| $2.09M | ﹤0.01% |
70,200
-64,500
| -48% | -$1.94M |
|
2374
PUT
Amplify Online Retail ETF
IBUY
$106M
| $2.09M | ﹤0.01% |
147,100
+128,800
| +704% | +$6.92M |
|
2375
Lamar Advertising Co
LAMR
$16.2B
| $2.09M | ﹤0.01% |
17,497
+5,362
| +44% | +$588K |
|
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.