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 | |
|---|---|---|---|---|---|---|
2651
CALL
NeoGenomics
NEO
$1.81B
| $1.33M | ﹤0.01% |
90,000
+30,200
| +51% | +$473K |
|
|
XIFR
2652
XPLR Infrastructure LP
XIFR
$1.18B
| $1.33M | ﹤0.01% |
+48,062
| New | +$1.25M |
|
2653
CALL
Repligen
RGEN
$7.44B
| $1.32M | ﹤0.01% |
8,900
-8,000
| -47% | -$1.15M |
|
|
TGNA
2654
CALL
DELISTED
TEGNA Inc
TGNA
| $1.32M | ﹤0.01% |
83,800
+48,700
| +139% | +$711K |
|
2655
PUT
Acuity Brands
AYI
$9.88B
| $1.32M | ﹤0.01% |
4,800
-2,200
| -31% | -$547K |
|
|
PMT
2656
PUT
PennyMac Mortgage Investment
PMT
$849M
| $1.32M | ﹤0.01% |
92,500
+72,800
| +370% | +$1.01M |
|
2657
Equinor
EQNR
$95.9B
| $1.32M | ﹤0.01% |
51,994
+45,777
| +736% | +$1.21M |
|
2658
PUT
Clover Health Investments
CLOV
$2.28B
| $1.31M | ﹤0.01% |
466,400
+116,000
| +33% | +$266K |
|
2659
CALL
Root
ROOT
$917M
| $1.31M | ﹤0.01% |
34,800
-6,000
| -15% | -$310K |
|
2660
CALL
Equinox Gold
EQX
$7.32B
| $1.31M | ﹤0.01% |
215,500
-70,700
| -25% | -$399K |
|
2661
PUT
Patterson-UTI
PTEN
$3.87B
| $1.31M | ﹤0.01% |
171,400
-15,500
| -8% | -$143K |
|
2662
PUT
Core & Main
CNM
$8.17B
| $1.31M | ﹤0.01% |
29,500
-7,000
| -19% | -$335K |
|
2663
PUT
Gentex
GNTX
$4.88B
| $1.31M | ﹤0.01% |
44,100
+36,300
| +465% | +$1.13M |
|
2664
PUT
Huazhu Hotels Group
HTHT
$12.4B
| $1.31M | ﹤0.01% |
35,200
+17,000
| +93% | +$516K |
|
2665
Sable Offshore Corp
SOC
$903M
| $1.31M | ﹤0.01% |
+55,382
| New | +$997K |
|
2666
Green Plains
GPRE
$1.19B
| $1.31M | ﹤0.01% |
96,482
+67,532
| +233% | +$988K |
|
2667
PUT
Halozyme
HALO
$9.72B
| $1.3M | ﹤0.01% |
22,800
+22,300
| +4,460% | +$1.28M |
|
2668
CALL
Hertz
HTZ
$572M
| $1.3M | ﹤0.01% |
394,900
-2,100
| -0.5% | -$7.34K |
|
2669
CALL
M/I Homes
MHO
$3.83B
| $1.3M | ﹤0.01% |
7,600
-100
| -1% | -$15.2K |
|
|
GAP
2670
The Gap Inc
GAP
$6.84B
| $1.3M | ﹤0.01% |
+59,058
| New | +$1.31M |
|
2671
CALL
Ericsson
ERIC
$30.7B
| $1.3M | ﹤0.01% |
171,700
-72,300
| -30% | -$506K |
|
2672
PUT
Viking Holdings
VIK
$44.9B
| $1.3M | ﹤0.01% |
37,300
+14,700
| +65% | +$503K |
|
2673
PUT
Canadian National Railway
CNI
$78.3B
| $1.3M | ﹤0.01% |
11,100
-9,000
| -45% | -$1.05M |
|
2674
PUT
Franklin Resources
BEN
$16.9B
| $1.3M | ﹤0.01% |
64,500
+33,100
| +105% | +$713K |
|
2675
PUT
FS KKR Capital
FSK
$2.98B
| $1.3M | ﹤0.01% |
65,800
-16,600
| -20% | -$330K |
|
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.