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 | |
|---|---|---|---|---|---|---|
8551
Scansource
SCSC
$1.16B
| $7K | ﹤0.01% |
+286
| New | +$8.64K |
|
8552
PUT
SKYX Platforms
SKYX
$155M
| $7K | ﹤0.01% |
+1,900
| New | +$7.31K |
|
8553
PUT
Solid Biosciences
SLDB
$785M
| $7K | ﹤0.01% |
+1,040
| New | +$10.5K |
|
8554
CALL
SEACOR Marine Holdings
SMHI
$216M
| $7K | ﹤0.01% |
1,400
| – | – |
|
8555
PUT
E.W. Scripps
SSP
$282M
| $7K | ﹤0.01% |
700
+500
| +250% | +$7.08K |
|
8556
Teucrium Agricultural Fund
TAGS
$19.3M
| $7K | ﹤0.01% |
245
-107
| -30% | -$3.23K |
|
8557
CALL
TFS Financial
TFSL
$5.18B
| $7K | ﹤0.01% |
600
-5,700
| -90% | -$80.8K |
|
8558
CALL
TriNet
TNET
$3.14B
| $7K | ﹤0.01% |
100
-4,400
| -98% | -$358K |
|
8559
CALL
Tyra Biosciences
TYRA
$1.84B
| $7K | ﹤0.01% |
+800
| New | +$7.32K |
|
8560
AgEagle Aerial Systems
UAVS
$41M
| $7K | ﹤0.01% |
16
+8
| +100% | +$4.96K |
|
8561
INNOVATE Corp
VATE
$106M
| $7K | ﹤0.01% |
+1,079
| New | +$16.5K |
|
8562
Velocity Financial
VEL
$698M
| $7K | ﹤0.01% |
730
+61
| +9% | +$699 |
|
8563
Valens Semiconductor
VLN
$166M
| $7K | ﹤0.01% |
+1,700
| New | +$6.8K |
|
8564
Vanguard Total Corporate Bond ETF
VTC
$1.73B
| $7K | ﹤0.01% |
+100
| New | +$7.71K |
|
|
VIVO
8565
VivoPower PLC
VIVO
$119M
| $7K | ﹤0.01% |
1,001
-365
| -27% | -$4.13K |
|
8566
PUT
Workiva
WK
$3.28B
| $7K | ﹤0.01% |
100
-1,800
| -95% | -$123K |
|
8567
Worksport
WKSP
$8.84M
| $7K | ﹤0.01% |
443
-1,578
| -78% | -$32.1K |
|
8568
CALL
Weis Markets
WMK
$1.9B
| $7K | ﹤0.01% |
100
| – | – |
|
8569
CALL
Expro Ltd
XPRO
$1.75B
| $7K | ﹤0.01% |
+600
| New | +$7.28K |
|
|
8570
Expro Ltd
XPRO
$1.75B
| $7K | ﹤0.01% |
602
+55
| +10% | +$667 |
|
8571
State Street SPDR S&P Telecom ETF
XTL
$564M
| $7K | ﹤0.01% |
+98
| New | +$8.21K |
|
8572
CALL
cbdMD
YCBD
$5.25M
| $7K | ﹤0.01% |
95
+84
| +764% | +$12.1K |
|
8573
PUT
York Water
YORW
$517M
| $7K | ﹤0.01% |
+200
| New | +$8.58K |
|
|
YRD
8574
CALL
Yiren Digital
YRD
$98.9M
| $7K | ﹤0.01% |
7,100
-900
| -11% | -$1.13K |
|
8575
ZK International Group
ZKIN
$70.5M
| $7K | ﹤0.01% |
1,335
-2,464
| -65% | -$18K |
|
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.