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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5751
CALL
MasterCraft Boat Holdings
MCFT
$616M
| $84K | ﹤0.01% |
4,500
+3,800
| +543% | +$87.4K |
|
5752
Oceaneering
OII
$4.83B
| $84K | ﹤0.01% |
+10,665
| New | +$100K |
|
5753
CALL
Paysign
PAYS
$513M
| $84K | ﹤0.01% |
35,800
+22,200
| +163% | +$53.2K |
|
5754
PUT
Surgery Partners
SGRY
$2.03B
| $84K | ﹤0.01% |
3,600
+3,100
| +620% | +$99K |
|
5755
PUT
Silicon Motion
SIMO
$8.56B
| $84K | ﹤0.01% |
1,300
+1,000
| +333% | +$78.4K |
|
|
SOL
5756
CALL
DELISTED
Emeren Group
SOL
| $84K | ﹤0.01% |
16,700
-18,400
| -52% | -$105K |
|
5757
Tronox
TROX
$916M
| $84K | ﹤0.01% |
6,885
-1,085
| -14% | -$16.1K |
|
5758
PUT
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$259M
| $84K | ﹤0.01% |
11,400
-1,100
| -9% | -$12K |
|
|
GPUS
5759
CALL
Hyperscale Data Inc
GPUS
$54.4M
| $84K | ﹤0.01% |
3
+2
| +200% | +$92.5K |
|
|
HUSE
5760
CALL
DELISTED
Strategy Shares US Market Rotation Strategy ETF
HUSE
| $84K | ﹤0.01% |
4,400
+400
| +10% | +$7.64K |
|
5761
Antero Midstream
AM
$10.1B
| $83K | ﹤0.01% |
9,126
-53,286
| -85% | -$525K |
|
5762
CALL
Brixmor Property Group
BRX
$9.44B
| $83K | ﹤0.01% |
4,500
-26,700
| -86% | -$577K |
|
5763
CALL
Curtiss-Wright
CW
$27.8B
| $83K | ﹤0.01% |
600
| – | – |
|
5764
eHealth
EHTH
$40.9M
| $83K | ﹤0.01% |
21,470
+11,598
| +117% | +$80.9K |
|
|
EVAX
5765
CALL
Evaxion A/S
EVAX
$24.9M
| $83K | ﹤0.01% |
638
+16
| +3% | +$2.02K |
|
5766
PUT
Graco
GGG
$13.3B
| $83K | ﹤0.01% |
1,400
-24,300
| -95% | -$1.56M |
|
|
KZR
5767
DELISTED
Kezar Life Sciences
KZR
| $83K | ﹤0.01% |
970
-1,659
| -63% | -$161K |
|
5768
Morningstar
MORN
$7.41B
| $83K | ﹤0.01% |
+395
| New | +$93.9K |
|
5769
CALL
Navigator Holdings
NVGS
$1.29B
| $83K | ﹤0.01% |
7,300
+900
| +14% | +$10.2K |
|
5770
CALL
Palomar
PLMR
$3.57B
| $83K | ﹤0.01% |
1,000
+400
| +67% | +$29.4K |
|
5771
CALL
Vital Farms
VITL
$518M
| $83K | ﹤0.01% |
7,000
+2,300
| +49% | +$27.4K |
|
|
LLAP
5772
DELISTED
Terran Orbital Corporation
LLAP
| $83K | ﹤0.01% |
+47,246
| New | +$192K |
|
|
GTHX
5773
CALL
DELISTED
G1 Therapeutics, Inc. Common Stock
GTHX
| $83K | ﹤0.01% |
6,700
-9,400
| -58% | -$107K |
|
|
MRNS
5774
PUT
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $83K | ﹤0.01% |
12,500
+9,500
| +317% | +$58.5K |
|
5775
PUT
AtriCure
ATRC
$1.98B
| $82K | ﹤0.01% |
+2,100
| New | +$96.1K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.