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 | |
|---|---|---|---|---|---|---|
4551
PUT
Gold Fields
GFI
$29B
| $208K | ﹤0.01% |
25,800
-172,800
| -87% | -$1.49M |
|
4552
PUT
Insmed
INSM
$21.4B
| $208K | ﹤0.01% |
9,700
+7,400
| +322% | +$177K |
|
4553
Precigen
PGEN
$2.24B
| $208K | ﹤0.01% |
98,262
+41,484
| +73% | +$87.5K |
|
4554
CALL
Rogers Communications
RCI
$18.3B
| $208K | ﹤0.01% |
5,400
-1,400
| -21% | -$61.9K |
|
|
SPTN
4555
CALL
DELISTED
SpartanNash
SPTN
| $208K | ﹤0.01% |
7,200
-3,400
| -32% | -$106K |
|
4556
Sportsman's Warehouse
SPWH
$44.5M
| $208K | ﹤0.01% |
+25,064
| New | +$237K |
|
4557
PUT
Symbotic
SYM
$5.48B
| $208K | ﹤0.01% |
+18,100
| New | +$266K |
|
|
TRVG
4558
trivago
TRVG
$373M
| $208K | ﹤0.01% |
35,940
+1,045
| +3% | +$7.85K |
|
4559
CALL
VeriSign
VRSN
$26.2B
| $208K | ﹤0.01% |
1,200
-20,600
| -94% | -$3.81M |
|
4560
Establishment Labs
ESTA
$2.72B
| $207K | ﹤0.01% |
3,796
+395
| +12% | +$23.6K |
|
|
OPTN
4561
PUT
DELISTED
OptiNose
OPTN
| $207K | ﹤0.01% |
+3,780
| New | +$208K |
|
4562
Global X S&P 500 Covered Call ETF
XYLD
$3.24B
| $207K | ﹤0.01% |
5,455
-1,772
| -25% | -$75K |
|
|
ENLC
4563
PUT
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $207K | ﹤0.01% |
23,300
-8,600
| -27% | -$82.6K |
|
4564
AerSale
ASLE
$293M
| $206K | ﹤0.01% |
11,115
+4,788
| +76% | +$88.5K |
|
4565
CALL
Brookfield Renewable
BEP
$9.97B
| $206K | ﹤0.01% |
6,600
-10,100
| -60% | -$373K |
|
|
HOFV
4566
CALL
DELISTED
Hall of Fame Resort & Entertainment Co
HOFV
| $206K | ﹤0.01% |
17,009
+14,304
| +529% | +$249K |
|
4567
CALL
Robert Half
RHI
$3.87B
| $206K | ﹤0.01% |
2,700
+1,500
| +125% | +$117K |
|
4568
CALL
XPEL
XPEL
$1.22B
| $206K | ﹤0.01% |
3,200
-800
| -20% | -$52K |
|
|
PENG
4569
CALL
Penguin Solutions Inc
PENG
$2.7B
| $206K | ﹤0.01% |
13,000
+2,500
| +24% | +$45.6K |
|
|
IMGN
4570
CALL
DELISTED
Immunogen Inc
IMGN
| $206K | ﹤0.01% |
43,200
+21,200
| +96% | +$112K |
|
4571
CALL
Allison Transmission
ALSN
$9.5B
| $205K | ﹤0.01% |
6,100
-12,200
| -67% | -$456K |
|
|
4572
CALL
AerSale
ASLE
$293M
| $205K | ﹤0.01% |
11,100
+6,900
| +164% | +$128K |
|
4573
Health Catalyst
HCAT
$154M
| $205K | ﹤0.01% |
+21,206
| New | +$281K |
|
4574
HubSpot
HUBS
$12.2B
| $205K | ﹤0.01% |
762
-1,271
| -63% | -$404K |
|
|
OPLN
4575
PUT
Openlane
OPLN
$4.21B
| $205K | ﹤0.01% |
18,400
-73,900
| -80% | -$1.11M |
|
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.