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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2401
CALL
Monster Beverage
MNST
$91.4B
| $1.07M | ﹤0.01% |
21,000
-16,800
| -44% | -$814K |
|
2402
Camtek
CAMT
$6.9B
| $1.06M | ﹤0.01% |
48,476
-2,336
| -5% | -$53.9K |
|
|
AGNT
2403
PUT
AGNT Inc
AGNT
$664M
| $1.06M | ﹤0.01% |
96,100
+79,700
| +486% | +$966K |
|
2404
CALL
Masco
MAS
$16B
| $1.06M | ﹤0.01% |
22,800
+17,100
| +300% | +$824K |
|
|
GTLS
2405
CALL
DELISTED
Chart Industries
GTLS
| $1.06M | ﹤0.01% |
9,200
+7,200
| +360% | +$1.16M |
|
2406
CALL
ProShares UltraShort Industrials
SIJ
$5.74M
| $1.06M | ﹤0.01% |
16,675
-4,950
| -23% | -$326K |
|
2407
CALL
Gerdau
GGB
$9.44B
| $1.06M | ﹤0.01% |
240,912
-26,712
| -10% | -$115K |
|
2408
Kimberly-Clark
KMB
$36.4B
| $1.06M | ﹤0.01% |
+7,802
| New | +$991K |
|
2409
PUT
Valmont Industries
VMI
$9.44B
| $1.06M | ﹤0.01% |
+3,200
| New | +$1.01M |
|
2410
CALL
Clean Energy Fuels
CLNE
$447M
| $1.06M | ﹤0.01% |
203,200
+41,800
| +26% | +$257K |
|
2411
CALL
Park Hotels & Resorts
PK
$2.97B
| $1.06M | ﹤0.01% |
89,600
-7,200
| -7% | -$87.7K |
|
2412
CALL
Eastern Bankshares
EBC
$5.25B
| $1.05M | ﹤0.01% |
61,200
+15,200
| +33% | +$291K |
|
2413
CALL
Sprouts Farmers Market
SFM
$7.04B
| $1.05M | ﹤0.01% |
32,600
+2,200
| +7% | +$68.5K |
|
2414
PUT
W.P. Carey
WPC
$17.1B
| $1.05M | ﹤0.01% |
13,784
-10,312
| -43% | -$775K |
|
|
SLCA
2415
CALL
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $1.05M | ﹤0.01% |
84,400
+1,900
| +2% | +$24.3K |
|
2416
PUT
Chegg
CHGG
$108M
| $1.05M | ﹤0.01% |
41,700
-30,300
| -42% | -$770K |
|
2417
PUT
HF Sinclair
DINO
$15.9B
| $1.05M | ﹤0.01% |
20,300
-70,100
| -78% | -$4.03M |
|
2418
CALL
Gevo
GEVO
$397M
| $1.05M | ﹤0.01% |
553,600
-174,200
| -24% | -$367K |
|
2419
PUT
Sturm, Ruger & Co
RGR
$610M
| $1.05M | ﹤0.01% |
20,700
+12,500
| +152% | +$679K |
|
2420
Trip.com Group
TCOM
$27.5B
| $1.05M | ﹤0.01% |
30,465
+21,365
| +235% | +$614K |
|
2421
CALL
Sonic Automotive
SAH
$3.15B
| $1.04M | ﹤0.01% |
21,200
+15,700
| +285% | +$752K |
|
2422
Box
BOX
$4.02B
| $1.04M | ﹤0.01% |
33,425
-13,572
| -29% | -$387K |
|
2423
CALL
Brinker International
EAT
$8.02B
| $1.04M | ﹤0.01% |
32,600
-5,000
| -13% | -$157K |
|
2424
CALL
Planet Fitness
PLNT
$4.23B
| $1.04M | ﹤0.01% |
13,200
+2,500
| +23% | +$174K |
|
2425
Qiagen
QGEN
$8.53B
| $1.04M | ﹤0.01% |
19,678
-23,367
| -54% | -$1.15M |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.