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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3501
PUT
Amcor
AMCR
$20.9B
| $546K | ﹤0.01% |
9,640
+280
| +3% | +$14.9K |
|
3502
CALL
Ramaco Resources Class A
METC
$664M
| $546K | ﹤0.01% |
48,269
+7,442
| +18% | +$88.7K |
|
3503
CALL
Teleflex
TFX
$5.8B
| $544K | ﹤0.01% |
2,200
| – | – |
|
|
PNNT
3504
CALL
Pennant Park Investment Corp
PNNT
$219M
| $543K | ﹤0.01% |
77,700
+47,100
| +154% | +$336K |
|
3505
Unum
UNM
$13.8B
| $543K | ﹤0.01% |
+9,141
| New | +$496K |
|
3506
CALL
Travere Therapeutics
TVTX
$5.27B
| $542K | ﹤0.01% |
38,800
+3,600
| +10% | +$37.5K |
|
3507
Valaris
VAL
$5.43B
| $542K | ﹤0.01% |
9,731
-15,483
| -61% | -$1.01M |
|
|
DRD
3508
PUT
DRDGold
DRD
$1.82B
| $540K | ﹤0.01% |
56,100
+19,700
| +54% | +$182K |
|
|
HPP
3509
PUT
Hudson Pacific Properties
HPP
$794M
| $540K | ﹤0.01% |
16,143
+7,186
| +80% | +$259K |
|
3510
CALL
Global X S&P 500 Tail Risk ETF
XTR
$4.77M
| $540K | ﹤0.01% |
22,000
+16,900
| +331% | +$528K |
|
3511
HF Sinclair
DINO
$16.4B
| $539K | ﹤0.01% |
12,102
+10,610
| +711% | +$506K |
|
|
GTLS
3512
DELISTED
Chart Industries
GTLS
| $539K | ﹤0.01% |
+4,349
| New | +$571K |
|
3513
CALL
Sabra Healthcare REIT
SBRA
$5.65B
| $539K | ﹤0.01% |
29,000
-3,700
| -11% | -$62.4K |
|
3514
PUT
Waters Corp
WAT
$36.4B
| $539K | ﹤0.01% |
1,500
-500
| -25% | -$163K |
|
3515
Teucrium Wheat Fund
WEAT
$293M
| $539K | ﹤0.01% |
20,598
+109
| +0.5% | +$2.77K |
|
|
ONC
3516
CALL
BeOne Medicines Ltd
ONC
$33.8B
| $538K | ﹤0.01% |
2,400
+2,000
| +500% | +$360K |
|
3517
CALL
Shutterstock
SSTK
$216M
| $537K | ﹤0.01% |
15,200
-14,300
| -48% | -$527K |
|
3518
Owens Corning
OC
$11.6B
| $536K | ﹤0.01% |
3,041
+1,644
| +118% | +$277K |
|
3519
CALL
Axogen
AXGN
$2.19B
| $535K | ﹤0.01% |
38,200
+33,700
| +749% | +$373K |
|
3520
PUT
Boise Cascade
BCC
$2.75B
| $535K | ﹤0.01% |
3,800
-600
| -14% | -$78.2K |
|
3521
ProShares UltraPro Dow 30
UDOW
$830M
| $535K | ﹤0.01% |
+11,146
| New | +$481K |
|
|
MSTX
3522
Defiance Daily Target 2x Long MSTR ETF
MSTX
$166M
| $535K | ﹤0.01% |
+1,845
| New | +$397K |
|
3523
Invesco CurrencyShares Euro Currency Trust
FXE
$341M
| $534K | ﹤0.01% |
+5,198
| New | +$527K |
|
3524
CALL
Medpace
MEDP
$16.5B
| $534K | ﹤0.01% |
1,600
+1,300
| +433% | +$494K |
|
|
KNGS
3525
CALL
DELISTED
Roundhill S&P Dividend Monarchs ETF
KNGS
| $534K | ﹤0.01% |
12,000
+11,100
| +1,233% | +$317K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.