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 | |
|---|---|---|---|---|---|---|
4476
CALL
Cooper-Standard Automotive
CPS
$517M
| $241K | ﹤0.01% |
19,400
-74,000
| -79% | -$1.06M |
|
|
TDAY
4477
CALL
USA Today Co
TDAY
$1.29B
| $241K | ﹤0.01% |
52,300
+48,600
| +1,314% | +$163K |
|
4478
CALL
Vertex
VERX
$2.16B
| $241K | ﹤0.01% |
6,700
-13,700
| -67% | -$441K |
|
4479
PUT
VistaGen Therapeutics
VTGN
$9.98M
| $241K | ﹤0.01% |
69,300
-34,000
| -33% | -$147K |
|
|
AHRT
4480
CALL
AH Realty Trust
AHRT
$536M
| $240K | ﹤0.01% |
21,700
+14,600
| +206% | +$159K |
|
4481
CALL
Sphere 3D
ANY
$15.7M
| $240K | ﹤0.01% |
22,310
+10,610
| +91% | +$120K |
|
4482
CALL
Crescent Capital BDC
CCAP
$405M
| $240K | ﹤0.01% |
12,800
+5,400
| +73% | +$96.4K |
|
|
DAWN
4483
DELISTED
Day One Biopharmaceuticals
DAWN
| $240K | ﹤0.01% |
17,425
+14,667
| +532% | +$215K |
|
4484
Extreme Networks
EXTR
$3.8B
| $240K | ﹤0.01% |
17,870
+4,050
| +29% | +$46.5K |
|
4485
PUT
Ingles Markets
IMKTA
$1.72B
| $240K | ﹤0.01% |
3,500
+2,500
| +250% | +$181K |
|
4486
Sigma Lithium
SGML
$1.05B
| $240K | ﹤0.01% |
20,030
-50,577
| -72% | -$749K |
|
4487
CALL
Loar Holdings
LOAR
$6.23B
| $240K | ﹤0.01% |
+4,500
| New | +$244K |
|
4488
Hallador Energy
HNRG
$646M
| $239K | ﹤0.01% |
+30,875
| New | +$193K |
|
|
ATSG
4489
CALL
DELISTED
Air Transport Services Group
ATSG
| $239K | ﹤0.01% |
17,300
-11,900
| -41% | -$158K |
|
4490
Albertsons Companies
ACI
$5.91B
| $238K | ﹤0.01% |
12,058
-57,937
| -83% | -$1.18M |
|
4491
PUT
Deluxe
DLX
$1.25B
| $238K | ﹤0.01% |
10,600
+7,700
| +266% | +$165K |
|
4492
CALL
Gildan
GIL
$9.49B
| $238K | ﹤0.01% |
6,300
-4,600
| -42% | -$166K |
|
|
ITOS
4493
DELISTED
iTeos Therapeutics
ITOS
| $238K | ﹤0.01% |
+16,083
| New | +$230K |
|
4494
PUT
Travel + Leisure Co
TNL
$4.76B
| $238K | ﹤0.01% |
5,300
-1,200
| -18% | -$53.8K |
|
|
VERV
4495
PUT
DELISTED
Verve Therapeutics
VERV
| $238K | ﹤0.01% |
48,800
+5,500
| +13% | +$34.6K |
|
4496
PUT
Weyerhaeuser
WY
$17.6B
| $238K | ﹤0.01% |
8,400
-55,400
| -87% | -$1.71M |
|
4497
PUT
DHT Holdings
DHT
$2.99B
| $237K | ﹤0.01% |
20,500
-67,700
| -77% | -$795K |
|
4498
CALL
Ouster
OUST
$2.11B
| $237K | ﹤0.01% |
24,200
-13,600
| -36% | -$138K |
|
4499
PUT
Broadridge
BR
$18.4B
| $236K | ﹤0.01% |
1,200
-25,700
| -96% | -$5.1M |
|
4500
Cal-Maine
CALM
$4.43B
| $236K | ﹤0.01% |
+3,862
| New | +$229K |
|
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.