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 | |
|---|---|---|---|---|---|---|
3726
CALL
ProPetro Holding
PUMP
$1.31B
| $303K | ﹤0.01% |
29,300
+21,800
| +291% | +$230K |
|
3727
CALL
TD Synnex
SNX
$19.8B
| $303K | ﹤0.01% |
3,200
-15,300
| -83% | -$1.43M |
|
3728
Varonis Systems
VRNS
$5.13B
| $303K | ﹤0.01% |
+12,694
| New | +$290K |
|
3729
CALL
Aviat Networks
AVNW
$264M
| $302K | ﹤0.01% |
9,700
-100
| -1% | -$3.04K |
|
3730
CALL
LPL Financial
LPLA
$27.4B
| $302K | ﹤0.01% |
1,400
+700
| +100% | +$164K |
|
3731
CALL
Progyny
PGNY
$2.41B
| $302K | ﹤0.01% |
9,700
-500
| -5% | -$18.1K |
|
3732
Mammoth Energy Services
TUSK
$125M
| $302K | ﹤0.01% |
34,978
+31,362
| +867% | +$179K |
|
3733
PUT
Eastman Chemical
EMN
$7.79B
| $301K | ﹤0.01% |
3,700
-200
| -5% | -$16.1K |
|
3734
Polestar Automotive Holding UK
PSNY
$2.03B
| $301K | ﹤0.01% |
1,896
+1,047
| +123% | +$169K |
|
3735
PUT
Cellebrite
CLBT
$3.7B
| $300K | ﹤0.01% |
69,000
-1,800
| -3% | -$8.04K |
|
|
DVAX
3736
PUT
DELISTED
Dynavax Technologies
DVAX
| $300K | ﹤0.01% |
28,200
-31,800
| -53% | -$369K |
|
|
FYBR
3737
PUT
DELISTED
Frontier Communications
FYBR
| $300K | ﹤0.01% |
11,800
+10,400
| +743% | +$250K |
|
3738
CALL
Sensus Healthcare
SRTS
$48.4M
| $300K | ﹤0.01% |
40,500
+7,700
| +23% | +$69.5K |
|
3739
CALL
EVgo
EVGO
$230M
| $299K | ﹤0.01% |
67,100
-80,300
| -54% | -$519K |
|
3740
PUT
Blue Owl Capital
OBDC
$5.47B
| $299K | ﹤0.01% |
25,900
-700
| -3% | -$8.39K |
|
3741
CALL
Oshkosh
OSK
$9.51B
| $299K | ﹤0.01% |
3,400
-28,300
| -89% | -$2.43M |
|
|
SOL
3742
DELISTED
Emeren Group
SOL
| $299K | ﹤0.01% |
66,231
-30,780
| -32% | -$142K |
|
3743
Teucrium Sugar Fund
CANE
$74.2M
| $297K | ﹤0.01% |
31,233
-3,423
| -10% | -$31.7K |
|
3744
CALL
Century Aluminum
CENX
$4.35B
| $297K | ﹤0.01% |
36,400
-35,600
| -49% | -$269K |
|
|
TGNA
3745
DELISTED
TEGNA Inc
TGNA
| $297K | ﹤0.01% |
14,029
+13,465
| +2,387% | +$271K |
|
3746
Coherus Oncology
CHRS
$222M
| $296K | ﹤0.01% |
37,415
+7,438
| +25% | +$57.2K |
|
3747
CALL
Kyndryl
KD
$2.94B
| $296K | ﹤0.01% |
26,700
-260,100
| -91% | -$2.62M |
|
|
BPT
3748
CALL
DELISTED
BP Prudhoe Bay Royalty Trust
BPT
| $295K | ﹤0.01% |
25,300
+3,000
| +13% | +$39.1K |
|
3749
CALL
Capital Southwest
CSWC
$1.48B
| $295K | ﹤0.01% |
17,300
+10,300
| +147% | +$184K |
|
3750
ProShares K-1 Free Crude Oil Strategy ETF
OILK
$200M
| $295K | ﹤0.01% |
6,584
+6,278
| +2,052% | +$279K |
|
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.