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 | |
|---|---|---|---|---|---|---|
2376
CALL
Hormel Foods
HRL
$13.9B
| $1.79M | ﹤0.01% |
56,600
-63,100
| -53% | -$2M |
|
2377
CALL
Omega Healthcare
OHI
$15.4B
| $1.79M | ﹤0.01% |
44,100
-47,300
| -52% | -$1.79M |
|
|
GTM
2378
ZoomInfo Technologies
GTM
$861M
| $1.79M | ﹤0.01% |
173,881
-238,580
| -58% | -$2.5M |
|
2379
CALL
Axos Financial
AX
$5.45B
| $1.79M | ﹤0.01% |
28,500
-22,400
| -44% | -$1.47M |
|
2380
DexCom
DXCM
$27.6B
| $1.79M | ﹤0.01% |
26,729
+4,980
| +23% | +$409K |
|
2381
CALL
Eastman Chemical
EMN
$7.8B
| $1.79M | ﹤0.01% |
16,000
-11,100
| -41% | -$1.11M |
|
|
SRG
2382
CALL
Seritage Growth Properties
SRG
$130M
| $1.79M | ﹤0.01% |
385,200
-28,700
| -7% | -$134K |
|
2383
CorMedix
CRMD
$617M
| $1.79M | ﹤0.01% |
221,317
+140,170
| +173% | +$759K |
|
2384
CALL
Lattice Semiconductor
LSCC
$17.6B
| $1.78M | ﹤0.01% |
33,600
-25,400
| -43% | -$1.3M |
|
2385
GitLab
GTLB
$5.28B
| $1.77M | ﹤0.01% |
34,383
+11,039
| +47% | +$552K |
|
|
DQ
2386
CALL
Daqo New Energy
DQ
$790M
| $1.77M | ﹤0.01% |
86,900
+58,300
| +204% | +$941K |
|
2387
CALL
ZTO Express
ZTO
$18.2B
| $1.77M | ﹤0.01% |
71,400
+35,600
| +99% | +$737K |
|
2388
CALL
TC Energy
TRP
$73.5B
| $1.76M | ﹤0.01% |
37,100
-50,500
| -58% | -$2.19M |
|
2389
Abercrombie & Fitch
ANF
$4.17B
| $1.76M | ﹤0.01% |
+12,607
| New | +$1.92M |
|
2390
Organon & Co
OGN
$3.55B
| $1.76M | ﹤0.01% |
92,147
+20,561
| +29% | +$426K |
|
2391
PUT
Service Corp International
SCI
$11.4B
| $1.76M | ﹤0.01% |
22,300
+11,300
| +103% | +$859K |
|
2392
PUT
SBA Communications
SBAC
$18.4B
| $1.76M | ﹤0.01% |
7,300
+3,300
| +83% | +$731K |
|
2393
PUT
Ares Capital
ARCC
$13.5B
| $1.75M | ﹤0.01% |
83,800
-42,900
| -34% | -$891K |
|
2394
PUT
Murphy Oil
MUR
$5.58B
| $1.75M | ﹤0.01% |
51,900
-8,500
| -14% | -$321K |
|
2395
PUT
Polaris
PII
$4.15B
| $1.75M | ﹤0.01% |
21,000
-29,500
| -58% | -$2.4M |
|
2396
PUT
Royal Bank of Canada
RY
$291B
| $1.75M | ﹤0.01% |
14,000
-4,100
| -23% | -$471K |
|
|
HBI
2397
PUT
DELISTED
Hanesbrands
HBI
| $1.74M | ﹤0.01% |
237,200
+63,500
| +37% | +$380K |
|
2398
CALL
Gentex
GNTX
$4.88B
| $1.74M | ﹤0.01% |
58,700
+33,600
| +134% | +$1.04M |
|
2399
CALL
1st Source
SRCE
$2.07B
| $1.74M | ﹤0.01% |
29,100
+26,400
| +978% | +$1.56M |
|
2400
PUT
Western Union
WU
$2.57B
| $1.74M | ﹤0.01% |
145,900
+14,100
| +11% | +$170K |
|
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.