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 | |
|---|---|---|---|---|---|---|
2576
PUT
Howmet Aerospace
HWM
$116B
| $1.43M | ﹤0.01% |
14,300
-2,400
| -14% | -$217K |
|
2577
CALL
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $1.43M | ﹤0.01% |
41,500
-9,900
| -19% | -$318K |
|
|
TERN
2578
CALL
DELISTED
Terns Pharmaceuticals
TERN
| $1.43M | ﹤0.01% |
171,300
+145,200
| +556% | +$1.19M |
|
2579
PUT
Funko
FNKO
$323M
| $1.43M | ﹤0.01% |
116,800
-4,000
| -3% | -$40.2K |
|
2580
CALL
Flywire
FLYW
$1.96B
| $1.43M | ﹤0.01% |
87,000
+65,200
| +299% | +$1.14M |
|
2581
PUT
Global Ship Lease
GSL
$1.57B
| $1.43M | ﹤0.01% |
53,500
-11,100
| -17% | -$285K |
|
2582
PUT
Sundial Growers
SNDL
$325M
| $1.43M | ﹤0.01% |
692,000
+28,000
| +4% | +$58.5K |
|
2583
CALL
BorgWarner
BWA
$13.2B
| $1.42M | ﹤0.01% |
39,200
-50,800
| -56% | -$1.67M |
|
2584
CALL
DoubleVerify
DV
$1.62B
| $1.42M | ﹤0.01% |
84,400
-36,200
| -30% | -$690K |
|
2585
CALL
Leggett & Platt
LEG
$1.52B
| $1.42M | ﹤0.01% |
104,400
+33,200
| +47% | +$414K |
|
2586
PUT
CenterPoint Energy
CNP
$29.1B
| $1.42M | ﹤0.01% |
48,300
+43,900
| +998% | +$1.23M |
|
2587
iShares Global Clean Energy ETF
ICLN
$2.38B
| $1.41M | ﹤0.01% |
96,121
+58,473
| +155% | +$824K |
|
2588
CALL
Pinnacle Financial Partners Inc
PNFP
$15.5B
| $1.41M | ﹤0.01% |
14,400
+1,000
| +7% | +$92K |
|
2589
Axsome Therapeutics
AXSM
$12.4B
| $1.41M | ﹤0.01% |
15,656
+7,036
| +82% | +$614K |
|
|
OKLO
2590
PUT
Oklo
OKLO
$7B
| $1.4M | ﹤0.01% |
173,600
-180,100
| -51% | -$1.36M |
|
2591
Henry Schein
HSIC
$9.74B
| $1.4M | ﹤0.01% |
19,258
+18,425
| +2,212% | +$1.28M |
|
2592
CALL
Kratos Defense & Security Solutions
KTOS
$8.88B
| $1.4M | ﹤0.01% |
60,200
-114,800
| -66% | -$2.48M |
|
|
PPLC
2593
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $1.4M | ﹤0.01% |
12,500
+3,800
| +44% | +$426K |
|
|
AGEN
2594
CALL
Agenus
AGEN
$249M
| $1.4M | ﹤0.01% |
255,000
-81,900
| -24% | -$613K |
|
2595
Ralph Lauren
RL
$22.2B
| $1.39M | ﹤0.01% |
7,181
+3,811
| +113% | +$659K |
|
2596
CALL
Emergent Biosolutions
EBS
$375M
| $1.39M | ﹤0.01% |
166,300
+112,300
| +208% | +$1.02M |
|
2597
CALL
Valley National Bancorp
VLY
$7.93B
| $1.39M | ﹤0.01% |
153,300
-118,900
| -44% | -$966K |
|
2598
PUT
American Superconductor
AMSC
$1.48B
| $1.39M | ﹤0.01% |
58,800
-17,900
| -23% | -$413K |
|
2599
PUT
Vanguard Dividend Appreciation ETF
VIG
$111B
| $1.39M | ﹤0.01% |
7,000
+6,500
| +1,300% | +$1.24M |
|
2600
CALL
Sigma Lithium
SGML
$1.08B
| $1.39M | ﹤0.01% |
112,100
-84,700
| -43% | -$925K |
|
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.