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 | |
|---|---|---|---|---|---|---|
6626
ADC Therapeutics
ADCT
$134M
| $43K | ﹤0.01% |
+8,942
| New | +$64.8K |
|
6627
PUT
American Outdoor Brands
AOUT
$155M
| $43K | ﹤0.01% |
5,000
+3,500
| +233% | +$29.8K |
|
|
AVDX
6628
DELISTED
AvidXchange
AVDX
| $43K | ﹤0.01% |
5,162
+2,835
| +122% | +$22K |
|
6629
PUT
Avnet
AVT
$7.29B
| $43K | ﹤0.01% |
1,200
-5,200
| -81% | -$224K |
|
6630
PUT
Cohu
COHU
$2.26B
| $43K | ﹤0.01% |
1,700
-5,700
| -77% | -$158K |
|
6631
PUT
Consolidated Water Co
CWCO
$467M
| $43K | ﹤0.01% |
2,800
+1,800
| +180% | +$28.4K |
|
6632
Global X DAX Germany ETF
DAX
$230M
| $43K | ﹤0.01% |
+2,117
| New | +$48.4K |
|
|
IMMP
6633
PUT
Immutep
IMMP
$56.3M
| $43K | ﹤0.01% |
28,000
+19,300
| +222% | +$39.2K |
|
6634
PUT
Katapult Holdings
KPLT
$30.4M
| $43K | ﹤0.01% |
1,812
+996
| +122% | +$30.8K |
|
6635
PUT
Ligand Pharmaceuticals
LGND
$5.76B
| $43K | ﹤0.01% |
802
-641
| -44% | -$37.7K |
|
|
NCTY
6636
CALL
The9 Ltd
NCTY
$68.1M
| $43K | ﹤0.01% |
4,490
-370
| -8% | -$5.28K |
|
|
ORGN
6637
PUT
DELISTED
Origin Materials
ORGN
| $43K | ﹤0.01% |
283
-120
| -30% | -$21.3K |
|
6638
OraSure Technologies
OSUR
$279M
| $43K | ﹤0.01% |
11,520
+2,428
| +27% | +$8.78K |
|
6639
PUT
Otter Tail
OTTR
$3.71B
| $43K | ﹤0.01% |
700
-100
| -13% | -$7.21K |
|
6640
PUT
Paysign
PAYS
$501M
| $43K | ﹤0.01% |
18,300
+11,800
| +182% | +$28.3K |
|
6641
CALL
PROG Holdings
PRG
$1.75B
| $43K | ﹤0.01% |
2,900
+2,700
| +1,350% | +$50.7K |
|
6642
Rogers Communications
RCI
$18.3B
| $43K | ﹤0.01% |
+1,140
| New | +$50.4K |
|
6643
CALL
RCM Technologies
RCMT
$201M
| $43K | ﹤0.01% |
2,600
-1,900
| -42% | -$32.9K |
|
6644
CALL
Recursion Pharmaceuticals
RXRX
$1.59B
| $43K | ﹤0.01% |
4,100
-1,900
| -32% | -$19.2K |
|
6645
PUT
Sana Biotechnology
SANA
$871M
| $43K | ﹤0.01% |
7,200
+5,100
| +243% | +$36.8K |
|
6646
PUT
UFP Industries
UFPI
$4.9B
| $43K | ﹤0.01% |
600
| – | – |
|
6647
ProShares Ultra Gold
UGL
$650M
| $43K | ﹤0.01% |
3,672
-1,536
| -29% | -$19.6K |
|
6648
CALL
Xenon Pharmaceuticals
XENE
$6.06B
| $43K | ﹤0.01% |
1,200
-2,700
| -69% | -$97.1K |
|
6649
PUT
Clear Secure
YOU
$5.57B
| $43K | ﹤0.01% |
1,900
-800
| -30% | -$19.6K |
|
|
HLTH
6650
CALL
DELISTED
Cue Health Inc. Common Stock
HLTH
| $43K | ﹤0.01% |
14,500
+800
| +6% | +$2.84K |
|
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.