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 | |
|---|---|---|---|---|---|---|
2651
Griffon
GFF
$4.28B
| $985K | ﹤0.01% |
+33,398
| New | +$1.01M |
|
2652
Hecla Mining
HL
$10.2B
| $985K | ﹤0.01% |
250,068
+54,062
| +28% | +$220K |
|
2653
FLEX LNG
FLNG
$1.65B
| $984K | ﹤0.01% |
31,073
+20,881
| +205% | +$661K |
|
2654
CALL
West Pharmaceutical
WST
$23.3B
| $984K | ﹤0.01% |
4,000
+3,000
| +300% | +$914K |
|
2655
CALL
Castle Biosciences
CSTL
$741M
| $983K | ﹤0.01% |
37,700
+37,000
| +5,286% | +$1.04M |
|
2656
PUT
2x Long VIX Futures ETF
UVIX
$271M
| $982K | ﹤0.01% |
9
+7
| +350% | +$815K |
|
|
LOGC
2657
CALL
DELISTED
ContextLogic
LOGC
| $982K | ﹤0.01% |
44,610
+2,043
| +5% | +$84.7K |
|
2658
PUT
Getty Images
GETY
$173M
| $981K | ﹤0.01% |
+144,500
| New | +$2.73M |
|
2659
Lufax Holding
LU
$1.27B
| $981K | ﹤0.01% |
+96,614
| New | +$1.65M |
|
|
OLPX
2660
PUT
DELISTED
Olaplex Holdings
OLPX
| $981K | ﹤0.01% |
102,800
+79,900
| +349% | +$1.15M |
|
2661
CALL
Senseonics Holdings Inc
SENS
$262M
| $980K | ﹤0.01% |
37,135
-17,940
| -33% | -$549K |
|
|
TGH
2662
PUT
DELISTED
Textainer Group Holdings limited
TGH
| $980K | ﹤0.01% |
36,500
+5,800
| +19% | +$176K |
|
|
CRHC
2663
CALL
DELISTED
Cohn Robbins Holdings Corp.
CRHC
| $980K | ﹤0.01% |
98,600
-39,100
| -28% | -$379K |
|
|
SNV
2664
PUT
DELISTED
Synovus
SNV
| $979K | ﹤0.01% |
26,100
+7,000
| +37% | +$278K |
|
2665
CALL
IPG Photonics
IPGP
$3.81B
| $978K | ﹤0.01% |
11,600
-500
| -4% | -$47.5K |
|
2666
First Majestic Silver
AG
$8.01B
| $977K | ﹤0.01% |
128,225
-60,369
| -32% | -$450K |
|
2667
CALL
Camping World
CWH
$389M
| $977K | ﹤0.01% |
38,600
-82,500
| -68% | -$2.29M |
|
|
GOEV
2668
CALL
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $977K | ﹤0.01% |
1,133
+560
| +98% | +$817K |
|
2669
PUT
Alpha Pro Tech
APT
$50.2M
| $975K | ﹤0.01% |
240,900
-36,100
| -13% | -$157K |
|
2670
PubMatic
PUBM
$594M
| $975K | ﹤0.01% |
+58,655
| New | +$1.06M |
|
2671
JB Hunt Transport Services
JBHT
$26.4B
| $974K | ﹤0.01% |
6,230
+5,126
| +464% | +$895K |
|
|
TWNK
2672
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $973K | ﹤0.01% |
41,887
+37,570
| +870% | +$853K |
|
2673
XP
XP
$8.65B
| $972K | ﹤0.01% |
+51,134
| New | +$1.01M |
|
|
ITCI
2674
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $972K | ﹤0.01% |
20,900
-3,700
| -15% | -$193K |
|
|
BTWN
2675
CALL
DELISTED
Bridgetown Holdings Limited Class A Ordinary Shares
BTWN
| $972K | ﹤0.01% |
97,000
-7,300
| -7% | -$72.8K |
|
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.