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 | |
|---|---|---|---|---|---|---|
4301
Freedom Holding
FRHC
$9.44B
| $324K | ﹤0.01% |
4,603
-11,956
| -72% | -$932K |
|
4302
PUT
First Watch Restaurant Group
FWRG
$814M
| $324K | ﹤0.01% |
+13,200
| New | +$299K |
|
4303
Jefferies Financial Group
JEF
$12.7B
| $323K | ﹤0.01% |
7,344
-27,291
| -79% | -$1.14M |
|
4304
CALL
Veeco
VECO
$2.62B
| $323K | ﹤0.01% |
9,200
+3,800
| +70% | +$127K |
|
4305
PUT
Avnet
AVT
$6.86B
| $322K | ﹤0.01% |
6,500
+900
| +16% | +$42.2K |
|
4306
CALL
Broadstone Net Lease
BNL
$4.25B
| $322K | ﹤0.01% |
20,600
+2,600
| +14% | +$41K |
|
|
BIG
4307
PUT
DELISTED
Big Lots, Inc.
BIG
| $322K | ﹤0.01% |
74,500
-212,800
| -74% | -$1.12M |
|
4308
PUT
Cactus
WHD
$3.63B
| $320K | ﹤0.01% |
6,400
-600
| -9% | -$26.6K |
|
4309
PUT
WillScot Mobile Mini Holdings
WSC
$4.37B
| $320K | ﹤0.01% |
6,900
+3,000
| +77% | +$139K |
|
4310
PUT
AbCellera Biologics
ABCL
$1.65B
| $319K | ﹤0.01% |
70,600
+3,300
| +5% | +$16.8K |
|
4311
Granite Construction
GVA
$5.16B
| $319K | ﹤0.01% |
5,599
-602
| -10% | -$30K |
|
|
AUGX
4312
DELISTED
Augmedix, Inc. Common Stock
AUGX
| $319K | ﹤0.01% |
+78,071
| New | +$349K |
|
4313
PUT
American Conservative Values ETF
ACVF
$148M
| $318K | ﹤0.01% |
9,300
-5,300
| -36% | -$203K |
|
4314
CALL
Ameren
AEE
$30.4B
| $318K | ﹤0.01% |
4,300
-4,800
| -53% | -$341K |
|
4315
PUT
Cerence
CRNC
$359M
| $318K | ﹤0.01% |
20,200
+19,900
| +6,633% | +$336K |
|
4316
Denison Mines
DNN
$2.43B
| $318K | ﹤0.01% |
163,353
+78,641
| +93% | +$149K |
|
4317
PUT
EXL Service
EXLS
$5.5B
| $318K | ﹤0.01% |
10,000
+4,400
| +79% | +$137K |
|
4318
PUT
Travel + Leisure Co
TNL
$4.76B
| $318K | ﹤0.01% |
6,500
+6,400
| +6,400% | +$273K |
|
4319
Cushman & Wakefield Ltd
CWK
$3.16B
| $317K | ﹤0.01% |
30,325
+28,710
| +1,778% | +$290K |
|
4320
CALL
Frontier Group Holdings
ULCC
$1.49B
| $317K | ﹤0.01% |
39,100
+38,900
| +19,450% | +$252K |
|
4321
CALL
Allogene Therapeutics
ALLO
$625M
| $316K | ﹤0.01% |
70,700
+69,400
| +5,338% | +$290K |
|
4322
CALL
Canadian National Railway
CNI
$78.5B
| $316K | ﹤0.01% |
2,400
-1,100
| -31% | -$141K |
|
4323
Fidelity MSCI Energy Index ETF
FENY
$1.97B
| $316K | ﹤0.01% |
12,233
+12,081
| +7,948% | +$284K |
|
4324
CALL
Outset Medical
OM
$86.4M
| $316K | ﹤0.01% |
9,513
+8,880
| +1,403% | +$450K |
|
4325
OneMain Financial
OMF
$7.27B
| $316K | ﹤0.01% |
+6,204
| New | +$296K |
|
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.