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 | |
|---|---|---|---|---|---|---|
1851
CALL
Bitdeer Technologies
BTDR
$2.81B
| $3.27M | ﹤0.01% |
417,000
+408,800
| +4,985% | +$3.39M |
|
1852
Air Products & Chemicals
APD
$66.3B
| $3.26M | ﹤0.01% |
10,947
-23,501
| -68% | -$6.43M |
|
1853
CALL
Alliance Resource Partners
ARLP
$3.18B
| $3.26M | ﹤0.01% |
130,300
+5,900
| +5% | +$143K |
|
|
VSXY
1854
CALL
Victoria's Secret
VSXY
$6.64B
| $3.25M | ﹤0.01% |
126,500
-11,700
| -8% | -$248K |
|
1855
CALL
dLocal
DLO
$4.26B
| $3.25M | ﹤0.01% |
406,300
+105,100
| +35% | +$852K |
|
1856
CALL
Equity Residential
EQR
$25.4B
| $3.25M | ﹤0.01% |
43,600
-900
| -2% | -$65K |
|
1857
PUT
Motorola Solutions
MSI
$69.4B
| $3.24M | ﹤0.01% |
7,200
-1,100
| -13% | -$459K |
|
|
CTLT
1858
PUT
DELISTED
CATALENT, INC.
CTLT
| $3.23M | ﹤0.01% |
53,400
+1,700
| +3% | +$101K |
|
1859
PUT
Campbell Soup
CPB
$6.51B
| $3.23M | ﹤0.01% |
66,100
-18,100
| -21% | -$881K |
|
1860
CALL
Fluence Energy
FLNC
$1.78B
| $3.23M | ﹤0.01% |
142,300
+7,300
| +5% | +$132K |
|
1861
PUT
Roper Technologies
ROP
$36.3B
| $3.23M | ﹤0.01% |
5,800
-200
| -3% | -$110K |
|
1862
PUT
O'Reilly Automotive
ORLY
$72.4B
| $3.22M | ﹤0.01% |
42,000
| – | – |
|
|
ARR
1863
PUT
Armour Residential REIT
ARR
$2.02B
| $3.22M | ﹤0.01% |
157,900
-3,400
| -2% | -$69.3K |
|
1864
CALL
Tecnoglass
TGLS
$2.01B
| $3.22M | ﹤0.01% |
46,900
+42,000
| +857% | +$2.44M |
|
1865
PUT
Carlyle Group
CG
$16.3B
| $3.22M | ﹤0.01% |
74,700
+71,100
| +1,975% | +$2.98M |
|
1866
CALL
Neurocrine Biosciences
NBIX
$17.7B
| $3.21M | ﹤0.01% |
27,900
-12,200
| -30% | -$1.67M |
|
1867
CALL
Boyd Gaming
BYD
$6.47B
| $3.21M | ﹤0.01% |
49,700
-159,500
| -76% | -$9.41M |
|
|
EMBJ
1868
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $3.2M | ﹤0.01% |
90,600
+1,400
| +2% | +$44.4K |
|
1869
BHP
BHP
$213B
| $3.2M | ﹤0.01% |
51,503
+27,737
| +117% | +$1.53M |
|
1870
CALL
Louisiana-Pacific
LPX
$5.2B
| $3.19M | ﹤0.01% |
29,700
-20,300
| -41% | -$1.91M |
|
1871
CALL
Return Stacked Bonds & Managed Futures ETF
RSBT
$137M
| $3.19M | ﹤0.01% |
152,200
+67,400
| +79% | +$1.22M |
|
1872
CALL
JetBlue
JBLU
$1.96B
| $3.19M | ﹤0.01% |
485,700
-32,200
| -6% | -$181K |
|
1873
CALL
Nokia
NOK
$50.8B
| $3.17M | ﹤0.01% |
726,400
+339,300
| +88% | +$1.37M |
|
1874
CALL
Applied Industrial Technologies
AIT
$12.8B
| $3.17M | ﹤0.01% |
14,200
+8,600
| +154% | +$1.75M |
|
1875
CALL
Shake Shack
SHAK
$2.3B
| $3.17M | ﹤0.01% |
30,700
+6,800
| +28% | +$655K |
|
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.