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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4526
PUT
PubMatic
PUBM
$608M
| $231K | ﹤0.01% |
11,400
-54,600
| -83% | -$1.22M |
|
4527
PUT
Bruker
BRKR
$9.4B
| $229K | ﹤0.01% |
3,600
+2,800
| +350% | +$211K |
|
|
CADE
4528
PUT
DELISTED
Cadence Bank
CADE
| $229K | ﹤0.01% |
8,100
| – | – |
|
4529
CALL
Carter's
CRI
$1.43B
| $229K | ﹤0.01% |
3,700
-28,600
| -89% | -$1.99M |
|
4530
CALL
CVRx
CVRX
$131M
| $229K | ﹤0.01% |
19,100
+17,000
| +810% | +$196K |
|
4531
CALL
Vital Farms
VITL
$586M
| $229K | ﹤0.01% |
4,900
-1,800
| -27% | -$62.1K |
|
4532
PUT
Brown-Forman Class B
BF.B
$13.5B
| $228K | ﹤0.01% |
5,300
+4,800
| +960% | +$226K |
|
|
EXK
4533
PUT
Endeavour Silver
EXK
$2.24B
| $228K | ﹤0.01% |
64,800
+53,800
| +489% | +$175K |
|
4534
CALL
Mitek Systems
MITK
$756M
| $228K | ﹤0.01% |
20,400
-34,700
| -63% | -$444K |
|
4535
CALL
MoonLake Immunotherapeutics
MLTX
$1.56B
| $228K | ﹤0.01% |
5,200
-9,700
| -65% | -$411K |
|
4536
CALL
Dana Inc
DAN
$2.88B
| $227K | ﹤0.01% |
18,800
+16,400
| +683% | +$213K |
|
4537
CALL
Future Fuel
FF
$205M
| $227K | ﹤0.01% |
44,300
-196,200
| -82% | -$1.06M |
|
|
GDEN
4538
CALL
DELISTED
Golden Entertainment
GDEN
| $227K | ﹤0.01% |
7,300
-100
| -1% | -$3.18K |
|
|
LKFT
4539
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $227K | ﹤0.01% |
9,178
+8,793
| +2,284% | +$250K |
|
4540
PUT
Grindr
GRND
$3.06B
| $227K | ﹤0.01% |
18,600
+9,100
| +96% | +$90.8K |
|
4541
PUT
Kodak
KODK
$809M
| $227K | ﹤0.01% |
42,300
-138,600
| -77% | -$702K |
|
4542
Lumen
LUMN
$6.43B
| $227K | ﹤0.01% |
207,166
-72,344
| -26% | -$91.7K |
|
4543
CALL
OptimizeRx
OPRX
$120M
| $227K | ﹤0.01% |
22,700
+22,500
| +11,250% | +$247K |
|
4544
CALL
Voyager Therapeutics
VYGR
$181M
| $227K | ﹤0.01% |
28,700
+25,300
| +744% | +$212K |
|
|
ARI
4545
PUT
Apollo Commercial Real Estate
ARI
$864M
| $226K | ﹤0.01% |
23,100
-4,600
| -17% | -$47.4K |
|
4546
CALL
Helix Energy Solutions
HLX
$1.34B
| $226K | ﹤0.01% |
19,000
+6,700
| +54% | +$74.7K |
|
4547
CALL
Prospect Capital
PSEC
$1.08B
| $226K | ﹤0.01% |
40,900
-100,700
| -71% | -$553K |
|
|
HA
4548
DELISTED
Hawaiian Holdings, Inc.
HA
| $226K | ﹤0.01% |
18,202
-40,098
| -69% | -$524K |
|
4549
AMC Global Media
AMCX
$450M
| $225K | ﹤0.01% |
23,315
+20,251
| +661% | +$267K |
|
4550
Brown & Brown
BRO
$25.1B
| $225K | ﹤0.01% |
+2,527
| New | +$219K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.