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 | |
|---|---|---|---|---|---|---|
2926
PUT
Vera Bradley
VRA
$105M
| $998K | ﹤0.01% |
+182,900
| New | +$1.08M |
|
|
HOLX
2927
DELISTED
Hologic
HOLX
| $996K | ﹤0.01% |
12,229
+6,559
| +116% | +$525K |
|
2928
CALL
Ecopetrol
EC
$32.9B
| $993K | ﹤0.01% |
111,300
+8,300
| +8% | +$84K |
|
2929
CALL
Nabors Industries
NBR
$1.23B
| $992K | ﹤0.01% |
15,400
-400
| -3% | -$30.9K |
|
2930
CALL
Lifestance Health
LFST
$4.16B
| $991K | ﹤0.01% |
141,700
+14,100
| +11% | +$84.7K |
|
|
QLTB
2931
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $990K | ﹤0.01% |
5,800
-64,300
| -92% | -$11M |
|
2932
PUT
Pagaya Technologies
PGY
$1.32B
| $989K | ﹤0.01% |
93,600
+50,300
| +116% | +$661K |
|
2933
PUT
Amkor Technology
AMKR
$16.1B
| $988K | ﹤0.01% |
32,300
+11,700
| +57% | +$398K |
|
2934
CALL
Tanger
SKT
$4.82B
| $988K | ﹤0.01% |
29,800
-11,400
| -28% | -$333K |
|
2935
CALL
Organon & Co
OGN
$3.55B
| $987K | ﹤0.01% |
51,600
-15,300
| -23% | -$317K |
|
2936
CALL
Howard Hughes
HHH
$3.93B
| $986K | ﹤0.01% |
33,700
+1,286
| +4% | +$90.8K |
|
2937
CALL
LiveRamp
RAMP
$2.29B
| $986K | ﹤0.01% |
39,800
+19,900
| +100% | +$543K |
|
2938
CALL
XP
XP
$8.62B
| $984K | ﹤0.01% |
54,900
+16,900
| +44% | +$308K |
|
2939
Perrigo
PRGO
$1.4B
| $983K | ﹤0.01% |
37,498
+12,893
| +52% | +$355K |
|
2940
PUT
RCI Hospitality Holdings
RICK
$199M
| $975K | ﹤0.01% |
21,900
+7,200
| +49% | +$322K |
|
2941
TD Synnex
SNX
$19.4B
| $975K | ﹤0.01% |
+8,127
| New | +$940K |
|
2942
PUT
Comstock Resources
CRK
$3.97B
| $974K | ﹤0.01% |
87,600
-92,600
| -51% | -$950K |
|
2943
FMC
FMC
$1.42B
| $974K | ﹤0.01% |
+14,785
| New | +$906K |
|
|
FLG
2944
PUT
Flagstar Bank National Association
FLG
$5.77B
| $974K | ﹤0.01% |
1,812,800
+949,200
| +110% | +$10.1M |
|
2945
CALL
Remitly
RELY
$4.74B
| $973K | ﹤0.01% |
72,700
+18,500
| +34% | +$251K |
|
2946
PUT
Cinemark Holdings
CNK
$3.82B
| $971K | ﹤0.01% |
34,900
-37,400
| -52% | -$951K |
|
2947
Manhattan Associates
MANH
$8.97B
| $971K | ﹤0.01% |
+3,452
| New | +$878K |
|
2948
PUT
ACM Research
ACMR
$5.83B
| $964K | ﹤0.01% |
47,500
-109,600
| -70% | -$2.1M |
|
2949
Northern Trust
NTRS
$22.2B
| $964K | ﹤0.01% |
+10,709
| New | +$936K |
|
2950
CALL
Viasat
VSAT
$9.79B
| $964K | ﹤0.01% |
80,800
-12,200
| -13% | -$197K |
|
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.